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arangodb/arangod/RestHandler/RestReplicationHandler.cpp

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////////////////////////////////////////////////////////////////////////////////
/// DISCLAIMER
///
/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
///
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///
/// http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
///
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
///
/// @author Jan Steemann
////////////////////////////////////////////////////////////////////////////////
#include "RestReplicationHandler.h"
#include "Aql/Query.h"
#include "Aql/QueryRegistry.h"
#include "Basics/ConditionLocker.h"
#include "Basics/ReadLocker.h"
#include "Basics/Result.h"
#include "Basics/RocksDBUtils.h"
#include "Basics/VelocyPackHelper.h"
#include "Cluster/ClusterComm.h"
#include "Cluster/ClusterFeature.h"
#include "Cluster/ClusterHelpers.h"
#include "Cluster/ClusterMethods.h"
#include "Cluster/FollowerInfo.h"
#include "Indexes/Index.h"
#include "Replication/DatabaseInitialSyncer.h"
#include "Replication/DatabaseReplicationApplier.h"
#include "Replication/GlobalInitialSyncer.h"
#include "Replication/GlobalReplicationApplier.h"
#include "Replication/ReplicationApplierConfiguration.h"
#include "Replication/ReplicationFeature.h"
#include "RestServer/QueryRegistryFeature.h"
#include "RestServer/ServerIdFeature.h"
#include "StorageEngine/EngineSelectorFeature.h"
#include "StorageEngine/PhysicalCollection.h"
#include "StorageEngine/StorageEngine.h"
#include "Transaction/StandaloneContext.h"
#include "Utils/CollectionGuard.h"
#include "Utils/OperationOptions.h"
#include "Utils/SingleCollectionTransaction.h"
#include "VocBase/LogicalCollection.h"
#include <velocypack/Builder.h>
#include <velocypack/Collection.h>
#include <velocypack/Iterator.h>
#include <velocypack/Parser.h>
#include <velocypack/Slice.h>
#include <velocypack/velocypack-aliases.h>
using namespace arangodb;
using namespace arangodb::basics;
using namespace arangodb::rest;
uint64_t const RestReplicationHandler::_defaultChunkSize = 128 * 1024;
uint64_t const RestReplicationHandler::_maxChunkSize = 128 * 1024 * 1024;
static Result restoreDataParser(char const* ptr, char const* pos,
std::string const& collectionName,
bool useRevision, std::string& key,
VPackBuilder& builder, VPackSlice& doc,
TRI_replication_operation_e& type) {
builder.clear();
try {
VPackParser parser(builder);
parser.parse(ptr, static_cast<size_t>(pos - ptr));
} catch (VPackException const&) {
// Could not parse the given string
return Result{
TRI_ERROR_HTTP_CORRUPTED_JSON,
"received invalid JSON data for collection " + collectionName};
} catch (std::exception const&) {
// Could not even build the string
return Result{
TRI_ERROR_HTTP_CORRUPTED_JSON,
"received invalid JSON data for collection " + collectionName};
} catch (...) {
return Result{TRI_ERROR_INTERNAL};
}
VPackSlice const slice = builder.slice();
if (!slice.isObject()) {
return Result{
TRI_ERROR_HTTP_CORRUPTED_JSON,
"received invalid JSON data for collection " + collectionName};
}
type = REPLICATION_INVALID;
for (auto const& pair : VPackObjectIterator(slice, true)) {
if (!pair.key.isString()) {
return Result{
TRI_ERROR_HTTP_CORRUPTED_JSON,
"received invalid JSON data for collection " + collectionName};
}
std::string const attributeName = pair.key.copyString();
if (attributeName == "type") {
if (pair.value.isNumber()) {
int v = pair.value.getNumericValue<int>();
if (v == 2301) {
// pre-3.0 type for edges
type = REPLICATION_MARKER_DOCUMENT;
} else {
type = static_cast<TRI_replication_operation_e>(v);
}
}
}
else if (attributeName == "data") {
if (pair.value.isObject()) {
doc = pair.value;
if (doc.hasKey(StaticStrings::KeyString)) {
key = doc.get(StaticStrings::KeyString).copyString();
}
}
}
else if (attributeName == "key") {
if (key.empty()) {
key = pair.value.copyString();
}
}
}
if (type == REPLICATION_MARKER_DOCUMENT && !doc.isObject()) {
return Result{TRI_ERROR_HTTP_BAD_PARAMETER,
"got document marker without contents"};
}
if (key.empty()) {
return Result{
TRI_ERROR_HTTP_BAD_PARAMETER,
"received invalid JSON data for collection " + collectionName};
}
return Result{TRI_ERROR_NO_ERROR};
}
RestReplicationHandler::RestReplicationHandler(GeneralRequest* request,
GeneralResponse* response)
: RestVocbaseBaseHandler(request, response) {}
RestReplicationHandler::~RestReplicationHandler() {}
////////////////////////////////////////////////////////////////////////////////
/// @brief creates an error if called on a coordinator server
////////////////////////////////////////////////////////////////////////////////
bool RestReplicationHandler::isCoordinatorError() {
if (_vocbase->type() == TRI_VOCBASE_TYPE_COORDINATOR) {
generateError(rest::ResponseCode::NOT_IMPLEMENTED,
TRI_ERROR_CLUSTER_UNSUPPORTED,
"replication API is not supported on a coordinator");
return true;
}
return false;
}
// main function that dispatches the different routes and commands
RestStatus RestReplicationHandler::execute() {
// extract the request type
auto const type = _request->requestType();
auto const& suffixes = _request->suffixes();
size_t const len = suffixes.size();
if (len >= 1) {
std::string const& command = suffixes[0];
if (command == "logger-state") {
if (type != rest::RequestType::GET) {
goto BAD_CALL;
}
handleCommandLoggerState();
} else if (command == "logger-tick-ranges") {
if (type != rest::RequestType::GET) {
goto BAD_CALL;
}
if (isCoordinatorError()) {
return RestStatus::DONE;
}
handleCommandLoggerTickRanges();
} else if (command == "logger-first-tick") {
if (type != rest::RequestType::GET) {
goto BAD_CALL;
}
if (isCoordinatorError()) {
return RestStatus::DONE;
}
handleCommandLoggerFirstTick();
} else if (command == "logger-follow") {
if (type != rest::RequestType::GET && type != rest::RequestType::PUT) {
goto BAD_CALL;
}
if (isCoordinatorError()) {
return RestStatus::DONE;
}
handleCommandLoggerFollow();
} else if (command == "determine-open-transactions") {
if (type != rest::RequestType::GET) {
goto BAD_CALL;
}
handleCommandDetermineOpenTransactions();
} else if (command == "batch") {
// access batch context in context manager
// example call: curl -XPOST --dump - --data '{}'
// http://localhost:5555/_api/replication/batch
// the object may contain a "ttl" for the context
// POST - create batch id / handle
// PUT - extend batch id / handle
// DEL - delete batchid
if (ServerState::instance()->isCoordinator()) {
handleTrampolineCoordinator();
} else {
handleCommandBatch();
}
} else if (command == "barrier") {
if (isCoordinatorError()) {
return RestStatus::DONE;
}
handleCommandBarrier();
} else if (command == "inventory") {
// get overview of collections and indexes followed by some extra data
// example call: curl --dump -
// http://localhost:5555/_api/replication/inventory?batchId=75
// {
// collections : [ ... ],
// "state" : {
// "running" : true,
// "lastLogTick" : "10528",
// "lastUncommittedLogTick" : "10531",
// "totalEvents" : 3782,
// "time" : "2017-07-19T21:50:59Z"
// },
// "tick" : "10531"
// }
if (type != rest::RequestType::GET) {
goto BAD_CALL;
}
if (ServerState::instance()->isCoordinator()) {
handleTrampolineCoordinator();
} else {
handleCommandInventory();
}
} else if (command == "keys") {
// preconditions for calling this route are unclear and undocumented --
// FIXME
if (type != rest::RequestType::GET && type != rest::RequestType::POST &&
type != rest::RequestType::PUT &&
type != rest::RequestType::DELETE_REQ) {
goto BAD_CALL;
}
if (isCoordinatorError()) {
return RestStatus::DONE;
}
if (type == rest::RequestType::POST) {
// has to be called first will bind the iterator to a collection
// example: curl -XPOST --dump -
// 'http://localhost:5555/_db/_system/_api/replication/keys/?collection=_users&batchId=169'
// ; echo
// returns
// { "id": <context id - int>,
// "count": <number of documents in collection - int>
// }
handleCommandCreateKeys();
} else if (type == rest::RequestType::GET) {
// curl --dump -
// 'http://localhost:5555/_db/_system/_api/replication/keys/123?collection=_users'
// ; echo # id is batchid
handleCommandGetKeys();
} else if (type == rest::RequestType::PUT) {
handleCommandFetchKeys();
} else if (type == rest::RequestType::DELETE_REQ) {
handleCommandRemoveKeys();
}
} else if (command == "dump") {
// works on collections
// example: curl --dump -
// 'http://localhost:5555/_db/_system/_api/replication/dump?collection=test&batchId=115'
// requires batch-id
// does internally an
// - get inventory
// - purge local
// - dump remote to local
if (type != rest::RequestType::GET) {
goto BAD_CALL;
}
if (ServerState::instance()->isCoordinator()) {
handleTrampolineCoordinator();
} else {
handleCommandDump();
}
} else if (command == "restore-collection") {
if (type != rest::RequestType::PUT) {
goto BAD_CALL;
}
handleCommandRestoreCollection();
} else if (command == "restore-indexes") {
if (type != rest::RequestType::PUT) {
goto BAD_CALL;
}
handleCommandRestoreIndexes();
} else if (command == "restore-data") {
if (type != rest::RequestType::PUT) {
goto BAD_CALL;
}
handleCommandRestoreData();
} else if (command == "sync") {
if (type != rest::RequestType::PUT) {
goto BAD_CALL;
}
if (isCoordinatorError()) {
return RestStatus::DONE;
}
handleCommandSync();
} else if (command == "make-slave") {
if (type != rest::RequestType::PUT) {
goto BAD_CALL;
}
if (isCoordinatorError()) {
return RestStatus::DONE;
}
handleCommandMakeSlave();
} else if (command == "server-id") {
if (type != rest::RequestType::GET) {
goto BAD_CALL;
}
handleCommandServerId();
} else if (command == "applier-config") {
if (type == rest::RequestType::GET) {
handleCommandApplierGetConfig();
} else {
if (type != rest::RequestType::PUT) {
goto BAD_CALL;
}
handleCommandApplierSetConfig();
}
} else if (command == "applier-start") {
if (type != rest::RequestType::PUT) {
goto BAD_CALL;
}
if (isCoordinatorError()) {
return RestStatus::DONE;
}
handleCommandApplierStart();
} else if (command == "applier-stop") {
if (type != rest::RequestType::PUT) {
goto BAD_CALL;
}
if (isCoordinatorError()) {
return RestStatus::DONE;
}
handleCommandApplierStop();
} else if (command == "applier-state") {
if (type == rest::RequestType::DELETE_REQ) {
handleCommandApplierDeleteState();
} else {
if (type != rest::RequestType::GET) {
goto BAD_CALL;
}
handleCommandApplierGetState();
}
} else if (command == "clusterInventory") {
if (type != rest::RequestType::GET) {
goto BAD_CALL;
}
if (!ServerState::instance()->isCoordinator()) {
generateError(rest::ResponseCode::FORBIDDEN,
TRI_ERROR_CLUSTER_ONLY_ON_COORDINATOR);
} else {
handleCommandClusterInventory();
}
} else if (command == "addFollower") {
if (type != rest::RequestType::PUT) {
goto BAD_CALL;
}
if (!ServerState::instance()->isDBServer()) {
generateError(rest::ResponseCode::FORBIDDEN,
TRI_ERROR_CLUSTER_ONLY_ON_DBSERVER);
} else {
handleCommandAddFollower();
}
} else if (command == "removeFollower") {
if (type != rest::RequestType::PUT) {
goto BAD_CALL;
}
if (!ServerState::instance()->isDBServer()) {
generateError(rest::ResponseCode::FORBIDDEN,
TRI_ERROR_CLUSTER_ONLY_ON_DBSERVER);
} else {
handleCommandRemoveFollower();
}
} else if (command == "holdReadLockCollection") {
if (!ServerState::instance()->isDBServer()) {
generateError(rest::ResponseCode::FORBIDDEN,
TRI_ERROR_CLUSTER_ONLY_ON_DBSERVER);
} else {
if (type == rest::RequestType::POST) {
handleCommandHoldReadLockCollection();
} else if (type == rest::RequestType::PUT) {
handleCommandCheckHoldReadLockCollection();
} else if (type == rest::RequestType::DELETE_REQ) {
handleCommandCancelHoldReadLockCollection();
} else if (type == rest::RequestType::GET) {
handleCommandGetIdForReadLockCollection();
} else {
goto BAD_CALL;
}
}
} else {
generateError(rest::ResponseCode::BAD, TRI_ERROR_HTTP_BAD_PARAMETER,
std::string("invalid command '") + command + "'");
}
return RestStatus::DONE;
}
BAD_CALL:
if (len != 1) {
generateError(rest::ResponseCode::BAD, TRI_ERROR_HTTP_SUPERFLUOUS_SUFFICES,
"expecting URL /_api/replication/<command>");
} else {
generateError(rest::ResponseCode::METHOD_NOT_ALLOWED,
TRI_ERROR_HTTP_METHOD_NOT_ALLOWED);
}
return RestStatus::DONE;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief was docuBlock JSF_put_api_replication_makeSlave
////////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleCommandMakeSlave() {
bool isGlobal = false;
ReplicationApplier* applier = getApplier(isGlobal);
if (applier == nullptr) {
return;
}
bool success;
std::shared_ptr<VPackBuilder> parsedBody = parseVelocyPackBody(success);
if (!success) {
// error already created
return;
}
std::string databaseName;
if (!isGlobal) {
databaseName = _vocbase->name();
}
ReplicationApplierConfiguration configuration = ReplicationApplierConfiguration::fromVelocyPack(parsedBody->slice(), databaseName);
configuration._skipCreateDrop = false;
// will throw if invalid
configuration.validate();
std::unique_ptr<InitialSyncer> syncer;
if (isGlobal) {
syncer.reset(new GlobalInitialSyncer(configuration));
} else {
syncer.reset(new DatabaseInitialSyncer(_vocbase, configuration));
}
// forget about any existing replication applier configuration
applier->forget();
// start initial synchronization
TRI_voc_tick_t barrierId = 0;
TRI_voc_tick_t lastLogTick = 0;
try {
Result r = syncer->run(configuration._incremental);
if (r.fail()) {
THROW_ARANGO_EXCEPTION(r);
}
lastLogTick = syncer->getLastLogTick();
// steal the barrier from the syncer
barrierId = syncer->stealBarrier();
} catch (basics::Exception const& ex) {
THROW_ARANGO_EXCEPTION_MESSAGE(ex.code(), std::string("caught exception during slave creation: ") + ex.what());
} catch (std::exception const& ex) {
THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_INTERNAL, std::string("caught exception during slave creation: ") + ex.what());
} catch (...) {
THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_INTERNAL, "caught unknown exception during slave creation");
}
applier->reconfigure(configuration);
applier->start(lastLogTick, true, barrierId);
VPackBuilder result;
result.openObject();
applier->toVelocyPack(result);
result.close();
generateResult(rest::ResponseCode::OK, result.slice());
}
////////////////////////////////////////////////////////////////////////////////
/// @brief forward a command in the coordinator case
////////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleTrampolineCoordinator() {
bool useVst = false;
if (_request->transportType() == Endpoint::TransportType::VST) {
useVst = true;
}
if (_request == nullptr) {
THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_INTERNAL, "invalid request");
}
// First check the DBserver component of the body json:
ServerID DBserver = _request->value("DBserver");
if (DBserver.empty()) {
generateError(rest::ResponseCode::BAD, TRI_ERROR_HTTP_BAD_PARAMETER,
"need \"DBserver\" parameter");
return;
}
std::string const& dbname = _request->databaseName();
auto headers = std::make_shared<std::unordered_map<std::string, std::string>>(
arangodb::getForwardableRequestHeaders(_request.get()));
std::unordered_map<std::string, std::string> values = _request->values();
std::string params;
for (auto const& i : values) {
if (i.first != "DBserver") {
if (params.empty()) {
params.push_back('?');
} else {
params.push_back('&');
}
params.append(StringUtils::urlEncode(i.first));
params.push_back('=');
params.append(StringUtils::urlEncode(i.second));
}
}
// Set a few variables needed for our work:
auto cc = ClusterComm::instance();
if (cc == nullptr) {
// nullptr happens only during controlled shutdown
generateError(rest::ResponseCode::BAD, TRI_ERROR_SHUTTING_DOWN,
"shutting down server");
return;
}
std::unique_ptr<ClusterCommResult> res;
if (!useVst) {
HttpRequest* httpRequest = dynamic_cast<HttpRequest*>(_request.get());
if (httpRequest == nullptr) {
THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_INTERNAL,
"invalid request type");
}
// Send a synchronous request to that shard using ClusterComm:
res = cc->syncRequest("", TRI_NewTickServer(), "server:" + DBserver,
_request->requestType(),
"/_db/" + StringUtils::urlEncode(dbname) +
_request->requestPath() + params,
httpRequest->body(), *headers, 300.0);
} else {
// do we need to handle multiple payloads here - TODO
// here we switch vorm vst to http?!
// i am not allowed to change cluster comm!
res = cc->syncRequest("", TRI_NewTickServer(), "server:" + DBserver,
_request->requestType(),
"/_db/" + StringUtils::urlEncode(dbname) +
_request->requestPath() + params,
_request->payload().toJson(), *headers, 300.0);
}
if (res->status == CL_COMM_TIMEOUT) {
// No reply, we give up:
generateError(rest::ResponseCode::BAD, TRI_ERROR_CLUSTER_TIMEOUT,
"timeout within cluster");
return;
}
if (res->status == CL_COMM_BACKEND_UNAVAILABLE) {
// there is no result
generateError(rest::ResponseCode::BAD, TRI_ERROR_CLUSTER_CONNECTION_LOST,
"lost connection within cluster");
return;
}
if (res->status == CL_COMM_ERROR) {
// This could be a broken connection or an Http error:
TRI_ASSERT(nullptr != res->result && res->result->isComplete());
// In this case a proper HTTP error was reported by the DBserver,
// we simply forward the result.
// We intentionally fall through here.
}
bool dummy;
resetResponse(
static_cast<rest::ResponseCode>(res->result->getHttpReturnCode()));
_response->setContentType(
res->result->getHeaderField(StaticStrings::ContentTypeHeader, dummy));
if (!useVst) {
HttpResponse* httpResponse = dynamic_cast<HttpResponse*>(_response.get());
if (_response == nullptr) {
THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_INTERNAL,
"invalid response type");
}
httpResponse->body().swap(&(res->result->getBody()));
} else {
// TODO copy all payloads
VPackSlice slice = res->result->getBodyVelocyPack()->slice();
_response->setPayload(slice, true); // do we need to generate the body?!
}
auto const& resultHeaders = res->result->getHeaderFields();
for (auto const& it : resultHeaders) {
_response->setHeader(it.first, it.second);
}
}
////////////////////////////////////////////////////////////////////////////////
/// @brief was docuBlock JSF_get_api_replication_cluster_inventory
////////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleCommandClusterInventory() {
std::string const& dbName = _request->databaseName();
bool found;
bool includeSystem = true;
std::string const& value = _request->value("includeSystem", found);
if (found) {
includeSystem = StringUtils::boolean(value);
}
ClusterInfo* ci = ClusterInfo::instance();
std::vector<std::shared_ptr<LogicalCollection>> cols =
ci->getCollections(dbName);
VPackBuilder resultBuilder;
resultBuilder.openObject();
resultBuilder.add(VPackValue("collections"));
resultBuilder.openArray();
for (auto const& c : cols) {
// We want to check if the collection is usable and all followers
// are in sync:
auto shardMap = c->shardIds();
// shardMap is an unordered_map from ShardId (string) to a vector of
// servers (strings), wrapped in a shared_ptr
auto cic =
ci->getCollectionCurrent(dbName, basics::StringUtils::itoa(c->cid()));
// Check all shards:
bool isReady = true;
for (auto const& p : *shardMap) {
auto currentServerList = cic->servers(p.first /* shardId */);
if (!ClusterHelpers::compareServerLists(p.second, currentServerList)) {
isReady = false;
}
}
c->toVelocyPackForClusterInventory(resultBuilder, includeSystem, isReady);
}
resultBuilder.close(); // collections
TRI_voc_tick_t tick = TRI_CurrentTickServer();
auto tickString = std::to_string(tick);
resultBuilder.add("tick", VPackValue(tickString));
resultBuilder.add("state", VPackValue("unused"));
resultBuilder.close(); // base
generateResult(rest::ResponseCode::OK, resultBuilder.slice());
}
////////////////////////////////////////////////////////////////////////////////
/// @brief restores the structure of a collection TODO MOVE
////////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleCommandRestoreCollection() {
std::shared_ptr<VPackBuilder> parsedRequest;
try {
parsedRequest = _request->toVelocyPackBuilderPtr();
} catch (arangodb::velocypack::Exception const& e) {
std::string errorMsg = "invalid JSON: ";
errorMsg += e.what();
generateError(rest::ResponseCode::BAD, TRI_ERROR_HTTP_BAD_PARAMETER,
errorMsg);
return;
} catch (...) {
generateError(rest::ResponseCode::BAD, TRI_ERROR_HTTP_BAD_PARAMETER,
"invalid JSON");
return;
}
auto pair = rocksutils::stripObjectIds(parsedRequest->slice());
VPackSlice const slice = pair.first;
bool overwrite = false;
bool found;
std::string const& value1 = _request->value("overwrite", found);
if (found) {
overwrite = StringUtils::boolean(value1);
}
bool recycleIds = false;
std::string const& value2 = _request->value("recycleIds", found);
if (found) {
recycleIds = StringUtils::boolean(value2);
}
bool force = false;
std::string const& value3 = _request->value("force", found);
if (found) {
force = StringUtils::boolean(value3);
}
std::string const& value9 =
_request->value("ignoreDistributeShardsLikeErrors", found);
bool ignoreDistributeShardsLikeErrors =
found ? StringUtils::boolean(value9) : false;
uint64_t numberOfShards = 0;
std::string const& value4 = _request->value("numberOfShards", found);
if (found) {
numberOfShards = StringUtils::uint64(value4);
}
uint64_t replicationFactor = 1;
std::string const& value5 = _request->value("replicationFactor", found);
if (found) {
replicationFactor = StringUtils::uint64(value5);
}
std::string errorMsg;
int res;
if (ServerState::instance()->isCoordinator()) {
res = processRestoreCollectionCoordinator(
slice, overwrite, recycleIds, force, numberOfShards, errorMsg,
replicationFactor, ignoreDistributeShardsLikeErrors);
} else {
res =
processRestoreCollection(slice, overwrite, recycleIds, force, errorMsg);
}
if (res != TRI_ERROR_NO_ERROR) {
THROW_ARANGO_EXCEPTION(res);
}
VPackBuilder result;
result.add(VPackValue(VPackValueType::Object));
result.add("result", VPackValue(true));
result.close();
generateResult(rest::ResponseCode::OK, result.slice());
}
////////////////////////////////////////////////////////////////////////////////
/// @brief restores the indexes of a collection
////////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleCommandRestoreIndexes() {
std::shared_ptr<VPackBuilder> parsedRequest;
try {
parsedRequest = _request->toVelocyPackBuilderPtr();
} catch (...) {
generateError(rest::ResponseCode::BAD, TRI_ERROR_HTTP_BAD_PARAMETER,
"invalid JSON");
return;
}
VPackSlice const slice = parsedRequest->slice();
bool found;
bool force = false;
std::string const& value = _request->value("force", found);
if (found) {
force = StringUtils::boolean(value);
}
std::string errorMsg;
int res;
if (ServerState::instance()->isCoordinator()) {
res = processRestoreIndexesCoordinator(slice, force, errorMsg);
} else {
res = processRestoreIndexes(slice, force, errorMsg);
}
if (res != TRI_ERROR_NO_ERROR) {
THROW_ARANGO_EXCEPTION(res);
}
VPackBuilder result;
result.openObject();
result.add("result", VPackValue(true));
result.close();
generateResult(rest::ResponseCode::OK, result.slice());
}
////////////////////////////////////////////////////////////////////////////////
/// @brief restores the data of a collection
////////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleCommandRestoreData() {
std::string const& colName = _request->value("collection");
if (colName.empty()) {
generateError(rest::ResponseCode::BAD, TRI_ERROR_HTTP_BAD_PARAMETER,
"invalid collection parameter, not given");
return;
}
bool recycleIds = false;
std::string const& value2 = _request->value("recycleIds");
if (!value2.empty()) {
recycleIds = StringUtils::boolean(value2);
}
Result res = processRestoreData(colName, recycleIds);
if (res.fail()) {
if (res.errorMessage().empty()) {
generateError(GeneralResponse::responseCode(res.errorNumber()),
res.errorNumber());
} else {
generateError(GeneralResponse::responseCode(res.errorNumber()),
res.errorNumber(),
std::string(TRI_errno_string(res.errorNumber())) + ": " +
res.errorMessage());
}
} else {
VPackBuilder result;
result.add(VPackValue(VPackValueType::Object));
result.add("result", VPackValue(true));
result.close();
generateResult(rest::ResponseCode::OK, result.slice());
}
}
////////////////////////////////////////////////////////////////////////////////
/// @brief restores the structure of a collection TODO MOVE
////////////////////////////////////////////////////////////////////////////////
int RestReplicationHandler::processRestoreCollection(
VPackSlice const& collection, bool dropExisting, bool reuseId, bool force,
std::string& errorMsg) {
if (!collection.isObject()) {
errorMsg = "collection declaration is invalid";
return TRI_ERROR_HTTP_BAD_PARAMETER;
}
VPackSlice const parameters = collection.get("parameters");
if (!parameters.isObject()) {
errorMsg = "collection parameters declaration is invalid";
return TRI_ERROR_HTTP_BAD_PARAMETER;
}
VPackSlice const indexes = collection.get("indexes");
if (!indexes.isArray()) {
errorMsg = "collection indexes declaration is invalid";
return TRI_ERROR_HTTP_BAD_PARAMETER;
}
std::string const name = arangodb::basics::VelocyPackHelper::getStringValue(
parameters, "name", "");
if (name.empty()) {
errorMsg = "collection name is missing";
return TRI_ERROR_HTTP_BAD_PARAMETER;
}
if (arangodb::basics::VelocyPackHelper::getBooleanValue(parameters, "deleted",
false)) {
// we don't care about deleted collections
return TRI_ERROR_NO_ERROR;
}
grantTemporaryRights();
LogicalCollection* col = nullptr;
if (reuseId) {
TRI_voc_cid_t const cid =
arangodb::basics::VelocyPackHelper::extractIdValue(parameters);
if (cid == 0) {
errorMsg = "collection id is missing";
return TRI_ERROR_HTTP_BAD_PARAMETER;
}
// first look up the collection by the cid
col = _vocbase->lookupCollection(cid);
}
if (col == nullptr) {
// not found, try name next
col = _vocbase->lookupCollection(name);
}
// drop an existing collection if it exists
if (col != nullptr) {
if (dropExisting) {
Result res = _vocbase->dropCollection(col, true, -1.0);
if (res.errorNumber() == TRI_ERROR_FORBIDDEN) {
// some collections must not be dropped
// instead, truncate them
auto ctx = transaction::StandaloneContext::Create(_vocbase);
SingleCollectionTransaction trx(ctx, col->cid(),
AccessMode::Type::EXCLUSIVE);
// to turn off waitForSync!
trx.addHint(transaction::Hints::Hint::RECOVERY);
res = trx.begin();
if (!res.ok()) {
return res.errorNumber();
}
OperationOptions options;
OperationResult opRes = trx.truncate(name, options);
res = trx.finish(opRes.code);
return res.errorNumber();
}
if (!res.ok()) {
errorMsg =
"unable to drop collection '" + name + "': " + res.errorMessage();
res.reset(res.errorNumber(), errorMsg);
return res.errorNumber();
}
} else {
Result res = TRI_ERROR_ARANGO_DUPLICATE_NAME;
errorMsg =
"unable to create collection '" + name + "': " + res.errorMessage();
res.reset(res.errorNumber(), errorMsg);
return res.errorNumber();
}
}
// now re-create the collection
int res = createCollection(parameters, &col, reuseId);
if (res != TRI_ERROR_NO_ERROR) {
errorMsg =
"unable to create collection: " + std::string(TRI_errno_string(res));
return res;
}
return TRI_ERROR_NO_ERROR;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief restores the structure of a collection, coordinator case
////////////////////////////////////////////////////////////////////////////////
int RestReplicationHandler::processRestoreCollectionCoordinator(
VPackSlice const& collection, bool dropExisting, bool reuseId, bool force,
uint64_t numberOfShards, std::string& errorMsg, uint64_t replicationFactor,
bool ignoreDistributeShardsLikeErrors) {
if (!collection.isObject()) {
errorMsg = "collection declaration is invalid";
return TRI_ERROR_HTTP_BAD_PARAMETER;
}
VPackSlice const parameters = collection.get("parameters");
if (!parameters.isObject()) {
errorMsg = "collection parameters declaration is invalid";
return TRI_ERROR_HTTP_BAD_PARAMETER;
}
std::string const name = arangodb::basics::VelocyPackHelper::getStringValue(
parameters, "name", "");
if (name.empty()) {
errorMsg = "collection name is missing";
return TRI_ERROR_HTTP_BAD_PARAMETER;
}
if (arangodb::basics::VelocyPackHelper::getBooleanValue(parameters, "deleted",
false)) {
// we don't care about deleted collections
return TRI_ERROR_NO_ERROR;
}
std::string dbName = _vocbase->name();
ClusterInfo* ci = ClusterInfo::instance();
try {
// in a cluster, we only look up by name:
std::shared_ptr<LogicalCollection> col = ci->getCollection(dbName, name);
// drop an existing collection if it exists
if (dropExisting) {
int res = ci->dropCollectionCoordinator(dbName, col->cid_as_string(),
errorMsg, 0.0);
if (res == TRI_ERROR_FORBIDDEN ||
res ==
TRI_ERROR_CLUSTER_MUST_NOT_DROP_COLL_OTHER_DISTRIBUTESHARDSLIKE) {
// some collections must not be dropped
res = truncateCollectionOnCoordinator(dbName, name);
if (res != TRI_ERROR_NO_ERROR) {
errorMsg =
"unable to truncate collection (dropping is forbidden): " + name;
}
return res;
}
if (res != TRI_ERROR_NO_ERROR) {
errorMsg = "unable to drop collection '" + name + "': " +
std::string(TRI_errno_string(res));
return res;
}
} else {
int res = TRI_ERROR_ARANGO_DUPLICATE_NAME;
errorMsg = "unable to create collection '" + name + "': " +
std::string(TRI_errno_string(res));
return res;
}
} catch (...) {
}
// now re-create the collection
// Build up new information that we need to merge with the given one
VPackBuilder toMerge;
toMerge.openObject();
// We always need a new id
TRI_voc_tick_t newIdTick = ci->uniqid(1);
std::string newId = StringUtils::itoa(newIdTick);
toMerge.add("id", VPackValue(newId));
// Number of shards. Will be overwritten if not existent
VPackSlice const numberOfShardsSlice = parameters.get("numberOfShards");
if (!numberOfShardsSlice.isInteger()) {
// The information does not contain numberOfShards. Overwrite it.
VPackSlice const shards = parameters.get("shards");
if (shards.isObject()) {
numberOfShards = static_cast<uint64_t>(shards.length());
} else {
// "shards" not specified
// now check if numberOfShards property was given
if (numberOfShards == 0) {
// We take one shard if no value was given
numberOfShards = 1;
}
}
TRI_ASSERT(numberOfShards > 0);
toMerge.add("numberOfShards", VPackValue(numberOfShards));
}
// Replication Factor. Will be overwritten if not existent
VPackSlice const replFactorSlice = parameters.get("replicationFactor");
if (!replFactorSlice.isInteger()) {
if (replicationFactor == 0) {
replicationFactor = 1;
}
TRI_ASSERT(replicationFactor > 0);
toMerge.add("replicationFactor", VPackValue(replicationFactor));
}
// always use current version number when restoring a collection,
// because the collection is effectively NEW
toMerge.add("version", VPackValue(LogicalCollection::VERSION_31));
if (!name.empty() && name[0] == '_' && !parameters.hasKey("isSystem")) {
// system collection?
toMerge.add("isSystem", VPackValue(true));
}
toMerge.close(); // TopLevel
VPackSlice const type = parameters.get("type");
TRI_col_type_e collectionType;
if (type.isNumber()) {
collectionType = static_cast<TRI_col_type_e>(type.getNumericValue<int>());
} else {
errorMsg = "collection type not given or wrong";
return TRI_ERROR_HTTP_BAD_PARAMETER;
}
VPackSlice const sliceToMerge = toMerge.slice();
VPackBuilder mergedBuilder =
VPackCollection::merge(parameters, sliceToMerge, false);
VPackSlice const merged = mergedBuilder.slice();
try {
bool createWaitsForSyncReplication =
application_features::ApplicationServer::getFeature<ClusterFeature>(
"Cluster")
->createWaitsForSyncReplication();
auto col = ClusterMethods::createCollectionOnCoordinator(
collectionType, _vocbase, merged, ignoreDistributeShardsLikeErrors,
createWaitsForSyncReplication);
TRI_ASSERT(col != nullptr);
} catch (basics::Exception const& e) {
// Error, report it.
errorMsg = e.message();
return e.code();
}
// All other errors are thrown to the outside.
return TRI_ERROR_NO_ERROR;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief restores the data of a collection
////////////////////////////////////////////////////////////////////////////////
Result RestReplicationHandler::processRestoreData(std::string const& colName,
bool useRevision) {
grantTemporaryRights();
if (colName == "_users") {
// We need to handle the _users in a special way
return processRestoreUsersBatch(colName, useRevision);
}
auto ctx =
transaction::StandaloneContext::Create(_vocbase);
SingleCollectionTransaction trx(ctx, colName, AccessMode::Type::WRITE);
trx.addHint(transaction::Hints::Hint::RECOVERY); // to turn off waitForSync!
Result res = trx.begin();
if (!res.ok()) {
res.reset(res.errorNumber(), std::string("unable to start transaction (") +
std::string(__FILE__) + std::string(":") +
std::to_string(__LINE__) +
std::string("): ") + res.errorMessage());
return res;
}
res = processRestoreDataBatch(trx, colName, useRevision);
res = trx.finish(res);
return res;
}
Result RestReplicationHandler::parseBatch(
std::string const& collectionName, bool useRevision,
std::unordered_map<std::string, VPackValueLength>& latest,
VPackBuilder& allMarkers) {
VPackBuilder builder;
allMarkers.clear();
HttpRequest* httpRequest = dynamic_cast<HttpRequest*>(_request.get());
if (httpRequest == nullptr) {
THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_INTERNAL, "invalid request type");
}
std::string const& bodyStr = httpRequest->body();
char const* ptr = bodyStr.c_str();
char const* end = ptr + bodyStr.size();
VPackValueLength currentPos = 0;
// First parse and collect all markers, we assemble everything in one
// large builder holding an array. We keep for each key the latest
// entry.
{
VPackArrayBuilder guard(&allMarkers);
std::string key;
while (ptr < end) {
char const* pos = strchr(ptr, '\n');
if (pos == nullptr) {
pos = end;
} else {
*((char*)pos) = '\0';
}
if (pos - ptr > 1) {
// found something
key.clear();
VPackSlice doc;
TRI_replication_operation_e type = REPLICATION_INVALID;
Result res = restoreDataParser(ptr, pos, collectionName, useRevision,
key, builder, doc, type);
if (res.fail()) {
return res;
}
// Put into array of all parsed markers:
allMarkers.add(builder.slice());
auto it = latest.find(key);
if (it != latest.end()) {
// Already found, overwrite:
it->second = currentPos;
} else {
latest.emplace(std::make_pair(key, currentPos));
}
++currentPos;
}
ptr = pos + 1;
}
}
return Result{TRI_ERROR_NO_ERROR};
}
////////////////////////////////////////////////////////////////////////////////
/// @brief restores the data of _users collection
/// Special case, we shall allow to import in this collection,
/// however it is not sharded by key and we need to replace by name instead of
/// by key
////////////////////////////////////////////////////////////////////////////////
Result RestReplicationHandler::processRestoreUsersBatch(
std::string const& collectionName, bool useRevision) {
std::unordered_map<std::string, VPackValueLength> latest;
VPackBuilder allMarkers;
parseBatch(collectionName, useRevision, latest, allMarkers);
VPackSlice allMarkersSlice = allMarkers.slice();
std::string aql(
"FOR u IN @restored UPSERT {name: u.name} INSERT u REPLACE u "
"INTO @@collection OPTIONS {ignoreErrors: true, silent: true, "
"waitForSync: false, isRestore: true}");
auto bindVars = std::make_shared<VPackBuilder>();
bindVars->openObject();
bindVars->add("@collection", VPackValue(collectionName));
bindVars->add(VPackValue("restored"));
bindVars->openArray();
// Now loop over the markers and insert the docs, ignoring _key and _id
for (auto const& p : latest) {
VPackSlice const marker = allMarkersSlice.at(p.second);
VPackSlice const typeSlice = marker.get("type");
TRI_replication_operation_e type = REPLICATION_INVALID;
if (typeSlice.isNumber()) {
int typeInt = typeSlice.getNumericValue<int>();
if (typeInt == 2301) { // pre-3.0 type for edges
type = REPLICATION_MARKER_DOCUMENT;
} else {
type = static_cast<TRI_replication_operation_e>(typeInt);
}
}
if (type == REPLICATION_MARKER_DOCUMENT) {
VPackSlice const doc = marker.get("data");
TRI_ASSERT(doc.isObject());
// In the _users case we silently remove the _key value.
bindVars->openObject();
for (auto const& it : VPackObjectIterator(doc)) {
if (StringRef(it.key) != StaticStrings::KeyString &&
StringRef(it.key) != StaticStrings::IdString) {
bindVars->add(it.key);
bindVars->add(it.value);
}
}
bindVars->close();
}
}
bindVars->close(); // restored
bindVars->close(); // bindVars
arangodb::aql::Query query(false, _vocbase, arangodb::aql::QueryString(aql),
bindVars, nullptr, arangodb::aql::PART_MAIN);
auto queryRegistry = QueryRegistryFeature::QUERY_REGISTRY;
TRI_ASSERT(queryRegistry != nullptr);
auto queryResult = query.execute(queryRegistry);
return Result{queryResult.code};
}
////////////////////////////////////////////////////////////////////////////////
/// @brief restores the data of a collection
////////////////////////////////////////////////////////////////////////////////
Result RestReplicationHandler::processRestoreDataBatch(
transaction::Methods& trx, std::string const& collectionName,
bool useRevision) {
VPackBuilder builder;
std::unordered_map<std::string, VPackValueLength> latest;
VPackBuilder allMarkers;
parseBatch(collectionName, useRevision, latest, allMarkers);
// First remove all keys of which the last marker we saw was a deletion
// marker:
VPackSlice allMarkersSlice = allMarkers.slice();
VPackBuilder oldBuilder;
{
VPackArrayBuilder guard(&oldBuilder);
for (auto const& p : latest) {
VPackSlice const marker = allMarkersSlice.at(p.second);
VPackSlice const typeSlice = marker.get("type");
TRI_replication_operation_e type = REPLICATION_INVALID;
if (typeSlice.isNumber()) {
int typeInt = typeSlice.getNumericValue<int>();
if (typeInt == 2301) { // pre-3.0 type for edges
type = REPLICATION_MARKER_DOCUMENT;
} else {
type = static_cast<TRI_replication_operation_e>(typeInt);
}
}
if (type == REPLICATION_MARKER_REMOVE) {
oldBuilder.add(VPackValue(p.first)); // Add _key
} else if (type != REPLICATION_MARKER_DOCUMENT) {
return Result{TRI_ERROR_REPLICATION_UNEXPECTED_MARKER,
"unexpected marker type " + StringUtils::itoa(type)};
}
}
}
// Note that we ignore individual errors here, as long as the main
// operation did not fail. In particular, we intentionally ignore
// individual "DOCUMENT NOT FOUND" errors, because they can happen!
try {
OperationOptions options;
options.silent = true;
options.ignoreRevs = true;
options.isRestore = true;
options.waitForSync = false;
OperationResult opRes =
trx.remove(collectionName, oldBuilder.slice(), options);
if (!opRes.successful()) {
return opRes.code;
}
} catch (arangodb::basics::Exception const& ex) {
return ex.code();
} catch (...) {
return TRI_ERROR_INTERNAL;
}
// Now try to insert all keys for which the last marker was a document
// marker, note that these could still be replace markers!
builder.clear();
if (ServerState::instance()->isCoordinator() && collectionName == "_users") {
// Special-case for _users, we need to remove the _key and _id from the
// marker
VPackArrayBuilder guard(&builder);
for (auto const& p : latest) {
VPackSlice const marker = allMarkersSlice.at(p.second);
VPackSlice const typeSlice = marker.get("type");
TRI_replication_operation_e type = REPLICATION_INVALID;
if (typeSlice.isNumber()) {
int typeInt = typeSlice.getNumericValue<int>();
if (typeInt == 2301) { // pre-3.0 type for edges
type = REPLICATION_MARKER_DOCUMENT;
} else {
type = static_cast<TRI_replication_operation_e>(typeInt);
}
}
if (type == REPLICATION_MARKER_DOCUMENT) {
VPackSlice const doc = marker.get("data");
TRI_ASSERT(doc.isObject());
// In the _users case we silently remove the _key value.
builder.openObject();
for (auto const& it : VPackObjectIterator(doc)) {
if (StringRef(it.key) != StaticStrings::KeyString &&
StringRef(it.key) != StaticStrings::IdString) {
builder.add(it.key);
builder.add(it.value);
}
}
builder.close();
builder.add(doc);
}
}
} else {
VPackArrayBuilder guard(&builder);
for (auto const& p : latest) {
VPackSlice const marker = allMarkersSlice.at(p.second);
VPackSlice const typeSlice = marker.get("type");
TRI_replication_operation_e type = REPLICATION_INVALID;
if (typeSlice.isNumber()) {
int typeInt = typeSlice.getNumericValue<int>();
if (typeInt == 2301) { // pre-3.0 type for edges
type = REPLICATION_MARKER_DOCUMENT;
} else {
type = static_cast<TRI_replication_operation_e>(typeInt);
}
}
if (type == REPLICATION_MARKER_DOCUMENT) {
VPackSlice const doc = marker.get("data");
TRI_ASSERT(doc.isObject());
builder.add(doc);
}
}
}
VPackSlice requestSlice = builder.slice();
OperationResult opRes;
try {
OperationOptions options;
options.silent = false;
options.ignoreRevs = true;
options.isRestore = true;
options.waitForSync = false;
opRes = trx.insert(collectionName, requestSlice, options);
if (!opRes.successful()) {
return opRes.code;
}
} catch (arangodb::basics::Exception const& ex) {
return ex.code();
} catch (...) {
return TRI_ERROR_INTERNAL;
}
// Now go through the individual results and check each error, if it was
// TRI_ERROR_ARANGO_UNIQUE_CONSTRAINT_VIOLATED, then we have to call
// replace on the document:
VPackSlice resultSlice = opRes.slice();
VPackBuilder replBuilder; // documents for replace operation
{
VPackArrayBuilder guard(&oldBuilder);
VPackArrayBuilder guard2(&replBuilder);
VPackArrayIterator itRequest(requestSlice);
VPackArrayIterator itResult(resultSlice);
while (itRequest.valid()) {
VPackSlice result = *itResult;
VPackSlice error = result.get("error");
if (error.isTrue()) {
error = result.get("errorNum");
if (error.isNumber()) {
int code = error.getNumericValue<int>();
if (code == TRI_ERROR_ARANGO_UNIQUE_CONSTRAINT_VIOLATED) {
replBuilder.add(*itRequest);
} else {
return code;
}
} else {
return TRI_ERROR_INTERNAL;
}
}
itRequest.next();
itResult.next();
}
}
try {
OperationOptions options;
options.silent = true;
options.ignoreRevs = true;
options.isRestore = true;
options.waitForSync = false;
opRes = trx.replace(collectionName, replBuilder.slice(), options);
if (!opRes.successful()) {
return opRes.code;
}
} catch (arangodb::basics::Exception const& ex) {
return ex.code();
} catch (...) {
return TRI_ERROR_INTERNAL;
}
return TRI_ERROR_NO_ERROR;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief restores the indexes of a collection
////////////////////////////////////////////////////////////////////////////////
int RestReplicationHandler::processRestoreIndexes(VPackSlice const& collection,
bool force,
std::string& errorMsg) {
if (!collection.isObject()) {
errorMsg = "collection declaration is invalid";
return TRI_ERROR_HTTP_BAD_PARAMETER;
}
VPackSlice const parameters = collection.get("parameters");
if (!parameters.isObject()) {
errorMsg = "collection parameters declaration is invalid";
return TRI_ERROR_HTTP_BAD_PARAMETER;
}
VPackSlice const indexes = collection.get("indexes");
if (!indexes.isArray()) {
errorMsg = "collection indexes declaration is invalid";
return TRI_ERROR_HTTP_BAD_PARAMETER;
}
VPackValueLength const n = indexes.length();
if (n == 0) {
// nothing to do
return TRI_ERROR_NO_ERROR;
}
std::string const name = arangodb::basics::VelocyPackHelper::getStringValue(
parameters, "name", "");
if (name.empty()) {
errorMsg = "collection name is missing";
return TRI_ERROR_HTTP_BAD_PARAMETER;
}
if (arangodb::basics::VelocyPackHelper::getBooleanValue(parameters, "deleted",
false)) {
// we don't care about deleted collections
return TRI_ERROR_NO_ERROR;
}
int res = TRI_ERROR_NO_ERROR;
grantTemporaryRights();
READ_LOCKER(readLocker, _vocbase->_inventoryLock);
// look up the collection
try {
CollectionGuard guard(_vocbase, name.c_str());
LogicalCollection* collection = guard.collection();
auto ctx = transaction::StandaloneContext::Create(_vocbase);
SingleCollectionTransaction trx(ctx, collection->cid(),
AccessMode::Type::EXCLUSIVE);
Result res = trx.begin();
if (!res.ok()) {
errorMsg = "unable to start transaction: " + res.errorMessage();
res.reset(res.errorNumber(), errorMsg);
THROW_ARANGO_EXCEPTION(res);
}
auto physical = collection->getPhysical();
TRI_ASSERT(physical != nullptr);
for (VPackSlice const& idxDef : VPackArrayIterator(indexes)) {
std::shared_ptr<arangodb::Index> idx;
// {"id":"229907440927234","type":"hash","unique":false,"fields":["x","Y"]}
res = physical->restoreIndex(&trx, idxDef, idx);
if (res.errorNumber() == TRI_ERROR_NOT_IMPLEMENTED) {
continue;
}
if (res.fail()) {
errorMsg = "could not create index: " + res.errorMessage();
res.reset(res.errorNumber(), errorMsg);
break;
}
TRI_ASSERT(idx != nullptr);
}
if (res.fail()) {
return res.errorNumber();
}
res = trx.commit();
} catch (arangodb::basics::Exception const& ex) {
// fix error handling
errorMsg =
"could not create index: " + std::string(TRI_errno_string(ex.code()));
} catch (...) {
errorMsg = "could not create index: unknown error";
}
return res;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief restores the indexes of a collection, coordinator case
////////////////////////////////////////////////////////////////////////////////
int RestReplicationHandler::processRestoreIndexesCoordinator(
VPackSlice const& collection, bool force, std::string& errorMsg) {
if (!collection.isObject()) {
errorMsg = "collection declaration is invalid";
return TRI_ERROR_HTTP_BAD_PARAMETER;
}
VPackSlice const parameters = collection.get("parameters");
if (!parameters.isObject()) {
errorMsg = "collection parameters declaration is invalid";
return TRI_ERROR_HTTP_BAD_PARAMETER;
}
VPackSlice indexes = collection.get("indexes");
if (!indexes.isArray()) {
errorMsg = "collection indexes declaration is invalid";
return TRI_ERROR_HTTP_BAD_PARAMETER;
}
size_t const n = static_cast<size_t>(indexes.length());
if (n == 0) {
// nothing to do
return TRI_ERROR_NO_ERROR;
}
std::string name = arangodb::basics::VelocyPackHelper::getStringValue(
parameters, "name", "");
if (name.empty()) {
errorMsg = "collection name is missing";
return TRI_ERROR_HTTP_BAD_PARAMETER;
}
if (arangodb::basics::VelocyPackHelper::getBooleanValue(parameters, "deleted",
false)) {
// we don't care about deleted collections
return TRI_ERROR_NO_ERROR;
}
std::string dbName = _vocbase->name();
// in a cluster, we only look up by name:
ClusterInfo* ci = ClusterInfo::instance();
std::shared_ptr<LogicalCollection> col;
try {
col = ci->getCollection(dbName, name);
} catch (...) {
errorMsg = "could not find collection '" + name + "'";
return TRI_ERROR_ARANGO_COLLECTION_NOT_FOUND;
}
TRI_ASSERT(col != nullptr);
int res = TRI_ERROR_NO_ERROR;
for (VPackSlice const& idxDef : VPackArrayIterator(indexes)) {
VPackSlice type = idxDef.get("type");
if (type.isString() &&
(type.copyString() == "primary" || type.copyString() == "edge")) {
// must ignore these types of indexes during restore
continue;
}
VPackBuilder tmp;
res = ci->ensureIndexCoordinator(dbName, col->cid_as_string(), idxDef, true,
arangodb::Index::Compare, tmp, errorMsg,
3600.0);
if (res != TRI_ERROR_NO_ERROR) {
errorMsg =
"could not create index: " + std::string(TRI_errno_string(res));
break;
}
}
return res;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief was docuBlock JSF_put_api_replication_serverID
////////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleCommandServerId() {
VPackBuilder result;
result.add(VPackValue(VPackValueType::Object));
std::string const serverId = StringUtils::itoa(ServerIdFeature::getId());
result.add("serverId", VPackValue(serverId));
result.close();
generateResult(rest::ResponseCode::OK, result.slice());
}
////////////////////////////////////////////////////////////////////////////////
/// @brief was docuBlock JSF_put_api_replication_synchronize
////////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleCommandSync() {
bool isGlobal;
ReplicationApplier* applier = getApplier(isGlobal);
if (applier == nullptr) {
return;
}
bool success;
std::shared_ptr<VPackBuilder> parsedBody = parseVelocyPackBody(success);
if (!success) {
// error already created
return;
}
VPackSlice const body = parsedBody->slice();
std::string const endpoint =
VelocyPackHelper::getStringValue(body, "endpoint", "");
if (endpoint.empty()) {
generateError(rest::ResponseCode::BAD, TRI_ERROR_HTTP_BAD_PARAMETER,
"<endpoint> must be a valid endpoint");
return;
}
std::string dbname = isGlobal ? "" : _vocbase->name();
auto config = ReplicationApplierConfiguration::fromVelocyPack(body, dbname);
// will throw if invalid
config.validate();
// wait until all data in current logfile got synced
StorageEngine* engine = EngineSelectorFeature::ENGINE;
TRI_ASSERT(engine != nullptr);
engine->waitForSyncTimeout(5.0);
TRI_ASSERT(!config._skipCreateDrop);
std::unique_ptr<InitialSyncer> syncer;
if (isGlobal) {
syncer.reset(new GlobalInitialSyncer(config));
} else {
syncer.reset(new DatabaseInitialSyncer(_vocbase, config));
}
Result r = syncer->run(config._incremental);
if (r.fail()) {
LOG_TOPIC(ERR, Logger::REPLICATION)
<< "failed to sync: " << r.errorMessage();
generateError(r);
return;
}
// FIXME: change response for databases
VPackBuilder result;
result.add(VPackValue(VPackValueType::Object));
result.add("collections", VPackValue(VPackValueType::Array));
for (auto const& it : syncer->getProcessedCollections()) {
std::string const cidString = StringUtils::itoa(it.first);
// Insert a collection
result.add(VPackValue(VPackValueType::Object));
result.add("id", VPackValue(cidString));
result.add("name", VPackValue(it.second));
result.close(); // one collection
}
result.close(); // collections
auto tickString = std::to_string(syncer->getLastLogTick());
result.add("lastLogTick", VPackValue(tickString));
bool const keepBarrier =
VelocyPackHelper::getBooleanValue(body, "keepBarrier", false);
if (keepBarrier) {
auto barrierId = std::to_string(syncer->stealBarrier());
result.add("barrierId", VPackValue(barrierId));
}
result.close(); // base
generateResult(rest::ResponseCode::OK, result.slice());
}
////////////////////////////////////////////////////////////////////////////////
/// @brief was docuBlock JSF_put_api_replication_applier
////////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleCommandApplierGetConfig() {
bool isGlobal;
ReplicationApplier* applier = getApplier(isGlobal);
if (applier == nullptr) {
return;
}
auto configuration = applier->configuration();
VPackBuilder builder;
builder.openObject();
configuration.toVelocyPack(builder, false, false);
builder.close();
generateResult(rest::ResponseCode::OK, builder.slice());
}
////////////////////////////////////////////////////////////////////////////////
/// @brief was docuBlock JSF_put_api_replication_applier_adjust
////////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleCommandApplierSetConfig() {
bool isGlobal;
ReplicationApplier* applier = getApplier(isGlobal);
if (applier == nullptr) {
return;
}
bool success;
std::shared_ptr<VPackBuilder> parsedBody = parseVelocyPackBody(success);
if (!success) {
// error already created
return;
}
std::string databaseName;
if (!isGlobal) {
databaseName = _vocbase->name();
}
auto config = ReplicationApplierConfiguration::fromVelocyPack(applier->configuration(),
parsedBody->slice(), databaseName);
// will throw if invalid
config.validate();
applier->reconfigure(config);
handleCommandApplierGetConfig();
}
////////////////////////////////////////////////////////////////////////////////
/// @brief was docuBlock JSF_put_api_replication_applier_start
////////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleCommandApplierStart() {
bool isGlobal;
ReplicationApplier* applier = getApplier(isGlobal);
if (applier == nullptr) {
return;
}
bool found;
std::string const& value1 = _request->value("from", found);
TRI_voc_tick_t initialTick = 0;
bool useTick = false;
if (found) {
// query parameter "from" specified
initialTick = static_cast<TRI_voc_tick_t>(StringUtils::uint64(value1));
useTick = true;
}
TRI_voc_tick_t barrierId = 0;
std::string const& value2 = _request->value("barrierId", found);
if (found) {
// query parameter "barrierId" specified
barrierId = static_cast<TRI_voc_tick_t>(StringUtils::uint64(value2));
}
applier->start(initialTick, useTick, barrierId);
handleCommandApplierGetState();
}
////////////////////////////////////////////////////////////////////////////////
/// @brief was docuBlock JSF_put_api_replication_applier_stop
////////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleCommandApplierStop() {
bool isGlobal;
ReplicationApplier* applier = getApplier(isGlobal);
if (applier == nullptr) {
return;
}
applier->stopAndJoin();
handleCommandApplierGetState();
}
////////////////////////////////////////////////////////////////////////////////
/// @brief was docuBlock JSF_get_api_replication_applier_state
////////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleCommandApplierGetState() {
bool isGlobal;
ReplicationApplier* applier = getApplier(isGlobal);
if (applier == nullptr) {
return;
}
VPackBuilder builder;
builder.openObject();
applier->toVelocyPack(builder);
builder.close();
generateResult(rest::ResponseCode::OK, builder.slice());
}
////////////////////////////////////////////////////////////////////////////////
/// @brief delete the state of the replication applier
////////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleCommandApplierDeleteState() {
bool isGlobal;
ReplicationApplier* applier = getApplier(isGlobal);
if (applier == nullptr) {
return;
}
applier->forget();
handleCommandApplierGetState();
}
////////////////////////////////////////////////////////////////////////////////
/// @brief add a follower of a shard to the list of followers
////////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleCommandAddFollower() {
bool success = false;
std::shared_ptr<VPackBuilder> parsedBody = parseVelocyPackBody(success);
if (!success) {
// error already created
return;
}
VPackSlice const body = parsedBody->slice();
if (!body.isObject()) {
generateError(rest::ResponseCode::BAD, TRI_ERROR_HTTP_BAD_PARAMETER,
"body needs to be an object with attributes 'followerId' "
"and 'shard'");
return;
}
VPackSlice const followerId = body.get("followerId");
VPackSlice const readLockId = body.get("readLockId");
VPackSlice const shard = body.get("shard");
if (!followerId.isString() || !shard.isString()) {
generateError(rest::ResponseCode::BAD, TRI_ERROR_HTTP_BAD_PARAMETER,
"'followerId' and 'shard' attributes must be strings");
return;
}
auto col = _vocbase->lookupCollection(shard.copyString());
if (col == nullptr) {
generateError(rest::ResponseCode::SERVER_ERROR,
TRI_ERROR_ARANGO_COLLECTION_NOT_FOUND,
"did not find collection");
return;
}
VPackSlice const checksum = body.get("checksum");
// optional while introducing this bugfix. should definitely be required with
// 3.4
// and throw a 400 then when no checksum is provided
if (checksum.isString() && readLockId.isString()) {
std::string referenceChecksum;
{
CONDITION_LOCKER(locker, _condVar);
auto it = _holdReadLockJobs.find(readLockId.copyString());
if (it == _holdReadLockJobs.end()) {
// Entry has been removed since, so we cancel the whole thing
// right away and generate an error:
generateError(rest::ResponseCode::SERVER_ERROR,
TRI_ERROR_TRANSACTION_INTERNAL,
"read transaction was cancelled");
return;
}
auto trx = it->second;
if (!trx) {
generateError(rest::ResponseCode::SERVER_ERROR,
TRI_ERROR_TRANSACTION_INTERNAL,
"Read lock not yet acquired!");
return;
}
// referenceChecksum is the stringified number of documents in the
// collection
uint64_t num = col->numberDocuments(trx.get());
referenceChecksum = std::to_string(num);
}
auto result = col->compareChecksums(checksum, referenceChecksum);
if (result.fail()) {
auto errorNumber = result.errorNumber();
rest::ResponseCode code;
if (errorNumber == TRI_ERROR_REPLICATION_WRONG_CHECKSUM ||
errorNumber == TRI_ERROR_REPLICATION_WRONG_CHECKSUM_FORMAT) {
code = rest::ResponseCode::BAD;
} else {
code = rest::ResponseCode::SERVER_ERROR;
}
generateError(code, errorNumber, result.errorMessage());
return;
}
}
col->followers()->add(followerId.copyString());
VPackBuilder b;
{
VPackObjectBuilder bb(&b);
b.add("error", VPackValue(false));
}
generateResult(rest::ResponseCode::OK, b.slice());
}
////////////////////////////////////////////////////////////////////////////////
/// @brief remove a follower of a shard from the list of followers
////////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleCommandRemoveFollower() {
bool success = false;
std::shared_ptr<VPackBuilder> parsedBody = parseVelocyPackBody(success);
if (!success) {
// error already created
return;
}
VPackSlice const body = parsedBody->slice();
if (!body.isObject()) {
generateError(rest::ResponseCode::BAD, TRI_ERROR_HTTP_BAD_PARAMETER,
"body needs to be an object with attributes 'followerId' "
"and 'shard'");
return;
}
VPackSlice const followerId = body.get("followerId");
VPackSlice const shard = body.get("shard");
if (!followerId.isString() || !shard.isString()) {
generateError(rest::ResponseCode::BAD, TRI_ERROR_HTTP_BAD_PARAMETER,
"'followerId' and 'shard' attributes must be strings");
return;
}
auto col = _vocbase->lookupCollection(shard.copyString());
if (col == nullptr) {
generateError(rest::ResponseCode::SERVER_ERROR,
TRI_ERROR_ARANGO_COLLECTION_NOT_FOUND,
"did not find collection");
return;
}
col->followers()->remove(followerId.copyString());
VPackBuilder b;
{
VPackObjectBuilder bb(&b);
b.add("error", VPackValue(false));
}
generateResult(rest::ResponseCode::OK, b.slice());
}
////////////////////////////////////////////////////////////////////////////////
/// @brief hold a read lock on a collection to stop writes temporarily
////////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleCommandHoldReadLockCollection() {
bool success = false;
std::shared_ptr<VPackBuilder> parsedBody = parseVelocyPackBody(success);
if (!success) {
// error already created
return;
}
VPackSlice const body = parsedBody->slice();
if (!body.isObject()) {
generateError(rest::ResponseCode::BAD, TRI_ERROR_HTTP_BAD_PARAMETER,
"body needs to be an object with attributes 'collection', "
"'ttl' and 'id'");
return;
}
VPackSlice const collection = body.get("collection");
VPackSlice const ttlSlice = body.get("ttl");
VPackSlice const idSlice = body.get("id");
if (!collection.isString() || !ttlSlice.isNumber() || !idSlice.isString()) {
generateError(rest::ResponseCode::BAD, TRI_ERROR_HTTP_BAD_PARAMETER,
"'collection' must be a string and 'ttl' a number and "
"'id' a string");
return;
}
std::string id = idSlice.copyString();
auto col = _vocbase->lookupCollection(collection.copyString());
if (col == nullptr) {
generateError(rest::ResponseCode::SERVER_ERROR,
TRI_ERROR_ARANGO_COLLECTION_NOT_FOUND,
"did not find collection");
return;
}
double ttl = 0.0;
if (ttlSlice.isInteger()) {
try {
ttl = static_cast<double>(ttlSlice.getInt());
} catch (...) {
}
} else {
try {
ttl = ttlSlice.getDouble();
} catch (...) {
}
}
if (col->getStatusLocked() != TRI_VOC_COL_STATUS_LOADED) {
generateError(rest::ResponseCode::SERVER_ERROR,
TRI_ERROR_ARANGO_COLLECTION_NOT_LOADED,
"collection not loaded");
return;
}
{
CONDITION_LOCKER(locker, _condVar);
_holdReadLockJobs.emplace(
id, std::shared_ptr<SingleCollectionTransaction>(nullptr));
}
AccessMode::Type access = AccessMode::Type::READ;
if (StringRef(EngineSelectorFeature::ENGINE->typeName()) == "rocksdb") {
// we need to lock in EXCLUSIVE mode here, because simply locking
// in READ mode will not stop other writers in RocksDB. In order
// to stop other writers, we need to fetch the EXCLUSIVE lock
access = AccessMode::Type::EXCLUSIVE;
}
auto ctx =
transaction::StandaloneContext::Create(_vocbase);
auto trx =
std::make_shared<SingleCollectionTransaction>(ctx, col->cid(), access);
trx->addHint(transaction::Hints::Hint::LOCK_ENTIRELY);
Result res = trx->begin();
if (!res.ok()) {
generateError(rest::ResponseCode::SERVER_ERROR,
TRI_ERROR_TRANSACTION_INTERNAL,
"cannot begin read transaction");
return;
}
{
CONDITION_LOCKER(locker, _condVar);
auto it = _holdReadLockJobs.find(id);
if (it == _holdReadLockJobs.end()) {
// Entry has been removed since, so we cancel the whole thing
// right away and generate an error:
generateError(rest::ResponseCode::SERVER_ERROR,
TRI_ERROR_TRANSACTION_INTERNAL,
"read transaction was cancelled");
return;
}
it->second = trx; // mark the read lock as acquired
}
double now = TRI_microtime();
double startTime = now;
double endTime = startTime + ttl;
bool stopping = false;
{
CONDITION_LOCKER(locker, _condVar);
while (now < endTime) {
_condVar.wait(100000);
auto it = _holdReadLockJobs.find(id);
if (it == _holdReadLockJobs.end()) {
break;
}
if (application_features::ApplicationServer::isStopping()) {
stopping = true;
break;
}
now = TRI_microtime();
}
auto it = _holdReadLockJobs.find(id);
if (it != _holdReadLockJobs.end()) {
_holdReadLockJobs.erase(it);
}
}
if (stopping) {
generateError(rest::ResponseCode::SERVER_ERROR, TRI_ERROR_SHUTTING_DOWN);
return;
}
VPackBuilder b;
{
VPackObjectBuilder bb(&b);
b.add("error", VPackValue(false));
}
generateResult(rest::ResponseCode::OK, b.slice());
}
////////////////////////////////////////////////////////////////////////////////
/// @brief check the holding of a read lock on a collection
////////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleCommandCheckHoldReadLockCollection() {
bool success = false;
std::shared_ptr<VPackBuilder> parsedBody = parseVelocyPackBody(success);
if (!success) {
// error already created
return;
}
VPackSlice const body = parsedBody->slice();
if (!body.isObject()) {
generateError(rest::ResponseCode::BAD, TRI_ERROR_HTTP_BAD_PARAMETER,
"body needs to be an object with attribute 'id'");
return;
}
VPackSlice const idSlice = body.get("id");
if (!idSlice.isString()) {
generateError(rest::ResponseCode::BAD, TRI_ERROR_HTTP_BAD_PARAMETER,
"'id' needs to be a string");
return;
}
std::string id = idSlice.copyString();
bool lockHeld = false;
{
CONDITION_LOCKER(locker, _condVar);
auto it = _holdReadLockJobs.find(id);
if (it == _holdReadLockJobs.end()) {
generateError(rest::ResponseCode::NOT_FOUND, TRI_ERROR_HTTP_NOT_FOUND,
"no hold read lock job found for 'id'");
return;
}
if (it->second) {
lockHeld = true;
}
}
VPackBuilder b;
{
VPackObjectBuilder bb(&b);
b.add("error", VPackValue(false));
b.add("lockHeld", VPackValue(lockHeld));
}
generateResult(rest::ResponseCode::OK, b.slice());
}
////////////////////////////////////////////////////////////////////////////////
/// @brief cancel the holding of a read lock on a collection
////////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleCommandCancelHoldReadLockCollection() {
bool success = false;
std::shared_ptr<VPackBuilder> parsedBody = parseVelocyPackBody(success);
if (!success) {
// error already created
return;
}
VPackSlice const body = parsedBody->slice();
if (!body.isObject()) {
generateError(rest::ResponseCode::BAD, TRI_ERROR_HTTP_BAD_PARAMETER,
"body needs to be an object with attribute 'id'");
return;
}
VPackSlice const idSlice = body.get("id");
if (!idSlice.isString()) {
generateError(rest::ResponseCode::BAD, TRI_ERROR_HTTP_BAD_PARAMETER,
"'id' needs to be a string");
return;
}
std::string id = idSlice.copyString();
bool lockHeld = false;
{
CONDITION_LOCKER(locker, _condVar);
auto it = _holdReadLockJobs.find(id);
if (it != _holdReadLockJobs.end()) {
// Note that this approach works if the lock has been acquired
// as well as if we still wait for the read lock, in which case
// it will eventually be acquired but immediately released:
if (it->second) {
lockHeld = true;
}
_holdReadLockJobs.erase(it);
_condVar.broadcast();
}
}
VPackBuilder b;
{
VPackObjectBuilder bb(&b);
b.add("error", VPackValue(false));
b.add("lockHeld", VPackValue(lockHeld));
}
generateResult(rest::ResponseCode::OK, b.slice());
}
////////////////////////////////////////////////////////////////////////////////
/// @brief get ID for a read lock job
////////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleCommandGetIdForReadLockCollection() {
std::string id = std::to_string(TRI_NewTickServer());
VPackBuilder b;
{
VPackObjectBuilder bb(&b);
b.add("id", VPackValue(id));
}
generateResult(rest::ResponseCode::OK, b.slice());
}
////////////////////////////////////////////////////////////////////////////////
/// @brief was docuBlock JSF_get_api_replication_logger_return_state
////////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleCommandLoggerState() {
StorageEngine* engine = EngineSelectorFeature::ENGINE;
TRI_ASSERT(engine);
engine->waitForSyncTimeout(10.0); // only for mmfiles
VPackBuilder builder;
auto res = engine->createLoggerState(_vocbase, builder);
if (res.fail()) {
LOG_TOPIC(DEBUG, Logger::REPLICATION) << "failed to create logger-state" << res.errorMessage();
generateError(rest::ResponseCode::BAD, res.errorNumber(),
res.errorMessage());
return;
}
generateResult(rest::ResponseCode::OK, builder.slice());
}
//////////////////////////////////////////////////////////////////////////////
/// @brief return the first tick available in a logfile
/// @route GET logger-first-tick
/// @caller js/client/modules/@arangodb/replication.js
/// @response VPackObject with minTick of LogfileManager->ranges()
//////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleCommandLoggerFirstTick() {
TRI_voc_tick_t tick = UINT64_MAX;
Result res = EngineSelectorFeature::ENGINE->firstTick(tick);
VPackBuilder b;
b.add(VPackValue(VPackValueType::Object));
if (tick == UINT64_MAX || res.fail()) {
b.add("firstTick", VPackValue(VPackValueType::Null));
} else {
auto tickString = std::to_string(tick);
b.add("firstTick", VPackValue(tickString));
}
b.close();
generateResult(rest::ResponseCode::OK, b.slice());
}
//////////////////////////////////////////////////////////////////////////////
/// @brief return the available logfile range
/// @route GET logger-tick-ranges
/// @caller js/client/modules/@arangodb/replication.js
/// @response VPackArray, containing info about each datafile
/// * filename
/// * status
/// * tickMin - tickMax
//////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::handleCommandLoggerTickRanges() {
StorageEngine* engine = EngineSelectorFeature::ENGINE;
TRI_ASSERT(engine);
VPackBuilder b;
Result res = engine->createTickRanges(b);
if (res.ok()) {
generateResult(rest::ResponseCode::OK, b.slice());
} else {
generateError(res);
}
}
////////////////////////////////////////////////////////////////////////////////
/// @brief creates a collection, based on the VelocyPack provided
////////////////////////////////////////////////////////////////////////////////
int RestReplicationHandler::createCollection(VPackSlice slice,
arangodb::LogicalCollection** dst,
bool reuseId) {
if (dst != nullptr) {
*dst = nullptr;
}
if (!slice.isObject()) {
return TRI_ERROR_HTTP_BAD_PARAMETER;
}
std::string const name =
arangodb::basics::VelocyPackHelper::getStringValue(slice, "name", "");
if (name.empty()) {
return TRI_ERROR_HTTP_BAD_PARAMETER;
}
TRI_voc_cid_t cid = 0;
if (reuseId) {
cid = arangodb::basics::VelocyPackHelper::extractIdValue(slice);
if (cid == 0) {
return TRI_ERROR_HTTP_BAD_PARAMETER;
}
}
TRI_col_type_e const type = static_cast<TRI_col_type_e>(
arangodb::basics::VelocyPackHelper::getNumericValue<int>(
slice, "type", (int)TRI_COL_TYPE_DOCUMENT));
arangodb::LogicalCollection* col = nullptr;
if (cid > 0) {
col = _vocbase->lookupCollection(cid);
}
if (col != nullptr && col->type() == type) {
// collection already exists. TODO: compare attributes
return TRI_ERROR_NO_ERROR;
}
// always use current version number when restoring a collection,
// because the collection is effectively NEW
VPackBuilder patch;
patch.openObject();
patch.add("version", VPackValue(LogicalCollection::VERSION_31));
if (!name.empty() && name[0] == '_' && !slice.hasKey("isSystem")) {
// system collection?
patch.add("isSystem", VPackValue(true));
}
StorageEngine* engine = EngineSelectorFeature::ENGINE;
TRI_ASSERT(engine != nullptr);
engine->addParametersForNewCollection(patch, slice);
patch.close();
VPackBuilder builder = VPackCollection::merge(slice, patch.slice(), false);
slice = builder.slice();
col = _vocbase->createCollection(slice);
if (col == nullptr) {
return TRI_ERROR_INTERNAL;
}
TRI_ASSERT(col != nullptr);
/* Temporary ASSERTS to prove correctness of new constructor */
TRI_ASSERT(col->isSystem() == (name[0] == '_'));
#ifdef ARANGODB_ENABLE_MAINTAINER_MODE
TRI_voc_cid_t planId = 0;
VPackSlice const planIdSlice = slice.get("planId");
if (planIdSlice.isNumber()) {
planId =
static_cast<TRI_voc_cid_t>(planIdSlice.getNumericValue<uint64_t>());
} else if (planIdSlice.isString()) {
std::string tmp = planIdSlice.copyString();
planId = static_cast<TRI_voc_cid_t>(StringUtils::uint64(tmp));
} else if (planIdSlice.isNone()) {
// There is no plan ID it has to be equal to collection id
planId = col->cid();
}
TRI_ASSERT(col->planId() == planId);
#endif
if (dst != nullptr) {
*dst = col;
}
return TRI_ERROR_NO_ERROR;
}
////////////////////////////////////////////////////////////////////////////////
/// @brief determine the chunk size
////////////////////////////////////////////////////////////////////////////////
uint64_t RestReplicationHandler::determineChunkSize() const {
// determine chunk size
uint64_t chunkSize = _defaultChunkSize;
bool found;
std::string const& value = _request->value("chunkSize", found);
if (found) {
// query parameter "chunkSize" was specified
chunkSize = StringUtils::uint64(value);
// don't allow overly big allocations
if (chunkSize > _maxChunkSize) {
chunkSize = _maxChunkSize;
}
}
return chunkSize;
}
//////////////////////////////////////////////////////////////////////////////
/// @brief Grant temporary restore rights
//////////////////////////////////////////////////////////////////////////////
void RestReplicationHandler::grantTemporaryRights() {
if (ExecContext::CURRENT != nullptr) {
if (ExecContext::CURRENT->canUseDatabase(_vocbase->name(), AuthLevel::RW) ) {
// If you have administrative access on this database,
// we grant you everything for restore.
ExecContext::CURRENT = nullptr;
}
}
}
ReplicationApplier* RestReplicationHandler::getApplier(bool& global) {
global = false;
bool found = false;
std::string const& value = _request->value("global", found);
if (found) {
global = StringUtils::boolean(value);
}
if (global &&
_request->databaseName() != StaticStrings::SystemDatabase) {
generateError(rest::ResponseCode::FORBIDDEN, TRI_ERROR_FORBIDDEN,
"global inventory can only be created from within _system database");
return nullptr;
}
if (global) {
auto replicationFeature = application_features::ApplicationServer::
getFeature<ReplicationFeature>("Replication");
return replicationFeature->globalReplicationApplier();
} else {
return _vocbase->replicationApplier();
}
}
//////////////////////////////////////////////////////////////////////////////
/// @brief condition locker to wake up holdReadLockCollection jobs
//////////////////////////////////////////////////////////////////////////////
arangodb::basics::ConditionVariable RestReplicationHandler::_condVar;
//////////////////////////////////////////////////////////////////////////////
/// @brief global table of flags to cancel holdReadLockCollection jobs, if
/// the flag is set of the ID of a job, the job is cancelled
//////////////////////////////////////////////////////////////////////////////
std::unordered_map<std::string, std::shared_ptr<SingleCollectionTransaction>>
RestReplicationHandler::_holdReadLockJobs;
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