mirror of https://gitee.com/bigwinds/arangodb
467 lines
16 KiB
C++
467 lines
16 KiB
C++
////////////////////////////////////////////////////////////////////////////////
|
|
/// DISCLAIMER
|
|
///
|
|
/// Copyright 2014-2017 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 Daniel H. Larkin
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include "RocksDBEngine/RocksDBReplicationTailing.h"
|
|
#include "Basics/StaticStrings.h"
|
|
#include "Basics/StringRef.h"
|
|
#include "Logger/Logger.h"
|
|
#include "RocksDBEngine/RocksDBCommon.h"
|
|
#include "RocksDBEngine/RocksDBLogValue.h"
|
|
#include "VocBase/replication-common.h"
|
|
#include "VocBase/ticks.h"
|
|
|
|
#include <rocksdb/utilities/transaction_db.h>
|
|
#include <rocksdb/utilities/write_batch_with_index.h>
|
|
#include <rocksdb/write_batch.h>
|
|
|
|
using namespace arangodb;
|
|
using namespace arangodb::rocksutils;
|
|
using namespace arangodb::velocypack;
|
|
|
|
/// an incomplete convert function, basically only use for DDL ops
|
|
static TRI_replication_operation_e convertLogType(RocksDBLogType t) {
|
|
switch (t) {
|
|
// case Rocks:
|
|
// return REPLICATION_MARKER_DOCUMENT;
|
|
// case TRI_DF_MARKER_VPACK_REMOVE:
|
|
// return REPLICATION_MARKER_REMOVE;
|
|
// case RocksDBLogType::BeginTransaction:
|
|
// return REPLICATION_TRANSACTION_START;
|
|
// case TRI_DF_MARKER_VPACK_COMMIT_TRANSACTION:
|
|
// return REPLICATION_TRANSACTION_COMMIT;
|
|
// case TRI_DF_MARKER_VPACK_ABORT_TRANSACTION:
|
|
// return REPLICATION_TRANSACTION_ABORT;
|
|
case RocksDBLogType::CollectionCreate:
|
|
return REPLICATION_COLLECTION_CREATE;
|
|
case RocksDBLogType::CollectionDrop:
|
|
return REPLICATION_COLLECTION_DROP;
|
|
case RocksDBLogType::CollectionRename:
|
|
return REPLICATION_COLLECTION_RENAME;
|
|
case RocksDBLogType::CollectionChange:
|
|
return REPLICATION_COLLECTION_CHANGE;
|
|
case RocksDBLogType::IndexCreate:
|
|
return REPLICATION_INDEX_CREATE;
|
|
case RocksDBLogType::IndexDrop:
|
|
return REPLICATION_INDEX_DROP;
|
|
case RocksDBLogType::ViewCreate:
|
|
return REPLICATION_VIEW_CREATE;
|
|
case RocksDBLogType::ViewDrop:
|
|
return REPLICATION_VIEW_DROP;
|
|
case RocksDBLogType::ViewChange:
|
|
return REPLICATION_VIEW_CHANGE;
|
|
|
|
default:
|
|
return REPLICATION_INVALID;
|
|
}
|
|
}
|
|
|
|
/// WAL parser
|
|
class WALParser : public rocksdb::WriteBatch::Handler {
|
|
public:
|
|
explicit WALParser(TRI_vocbase_t* vocbase, uint64_t from, size_t& limit,
|
|
bool includeSystem, VPackBuilder& builder)
|
|
: _vocbase(vocbase),
|
|
_from(from),
|
|
_limit(limit),
|
|
_includeSystem(includeSystem),
|
|
_builder(builder) {}
|
|
|
|
void LogData(rocksdb::Slice const& blob) override {
|
|
RocksDBLogType type = RocksDBLogValue::type(blob);
|
|
TRI_DEFER(_lastLogType = type);
|
|
switch (type) {
|
|
case RocksDBLogType::DatabaseCreate: {
|
|
// FIXME: do we have to print something?
|
|
break;
|
|
}
|
|
case RocksDBLogType::DatabaseDrop: {
|
|
_currentDbId = RocksDBLogValue::databaseId(blob);
|
|
// FIXME: do we have to print something?
|
|
break;
|
|
}
|
|
case RocksDBLogType::CollectionRename: {
|
|
_oldCollectionName =
|
|
RocksDBLogValue::newCollectionName(blob).toString();
|
|
// intentional fallthrough
|
|
}
|
|
case RocksDBLogType::CollectionCreate:
|
|
case RocksDBLogType::CollectionChange:
|
|
case RocksDBLogType::CollectionDrop: {
|
|
if (_lastLogType == RocksDBLogType::IndexCreate) {
|
|
TRI_ASSERT(_currentDbId == RocksDBLogValue::databaseId(blob));
|
|
TRI_ASSERT(_currentCollectionId ==
|
|
RocksDBLogValue::collectionId(blob));
|
|
}
|
|
_currentDbId = RocksDBLogValue::databaseId(blob);
|
|
_currentCollectionId = RocksDBLogValue::collectionId(blob);
|
|
break;
|
|
}
|
|
case RocksDBLogType::IndexCreate: {
|
|
_currentDbId = RocksDBLogValue::databaseId(blob);
|
|
_currentCollectionId = RocksDBLogValue::collectionId(blob);
|
|
VPackSlice indexSlice = RocksDBLogValue::indexSlice(blob);
|
|
_builder.openObject();
|
|
_builder.add(
|
|
"type",
|
|
VPackValue(static_cast<uint64_t>(REPLICATION_INDEX_CREATE)));
|
|
_builder.add("database", VPackValue(std::to_string(_currentDbId)));
|
|
_builder.add("cid", VPackValue(std::to_string(_currentCollectionId)));
|
|
_builder.add("data", indexSlice);
|
|
_builder.close();
|
|
break;
|
|
}
|
|
case RocksDBLogType::IndexDrop: {
|
|
_currentDbId = RocksDBLogValue::databaseId(blob);
|
|
_currentCollectionId = RocksDBLogValue::collectionId(blob);
|
|
TRI_idx_iid_t iid = RocksDBLogValue::indexId(blob);
|
|
_builder.openObject();
|
|
_builder.add(
|
|
"type",
|
|
VPackValue(static_cast<uint64_t>(REPLICATION_INDEX_DROP)));
|
|
_builder.add("database", VPackValue(std::to_string(_currentDbId)));
|
|
_builder.add("cid", VPackValue(std::to_string(_currentCollectionId)));
|
|
_builder.add("data", VPackValue(VPackValueType::Object));
|
|
_builder.add("id", VPackValue(std::to_string(iid)));
|
|
_builder.close();
|
|
_builder.close();
|
|
break;
|
|
}
|
|
case RocksDBLogType::ViewCreate: {
|
|
// TODO
|
|
break;
|
|
}
|
|
case RocksDBLogType::ViewDrop: {
|
|
// TODO
|
|
break;
|
|
}
|
|
case RocksDBLogType::ViewChange: {
|
|
// TODO
|
|
break;
|
|
}
|
|
case RocksDBLogType::BeginTransaction: {
|
|
_seenBeginTransaction = true;
|
|
_currentDbId = RocksDBLogValue::databaseId(blob);
|
|
_currentTrxId = RocksDBLogValue::transactionId(blob);
|
|
|
|
_builder.openObject();
|
|
_builder.add("tick", VPackValue(std::to_string(_currentSequence)));
|
|
_builder.add(
|
|
"type",
|
|
VPackValue(static_cast<uint64_t>(REPLICATION_TRANSACTION_START)));
|
|
_builder.add("database", VPackValue(std::to_string(_currentDbId)));
|
|
_builder.add("tid", VPackValue(std::to_string(_currentTrxId)));
|
|
_builder.close();
|
|
break;
|
|
}
|
|
case RocksDBLogType::DocumentOperationsPrologue: {
|
|
_currentCollectionId = RocksDBLogValue::collectionId(blob);
|
|
break;
|
|
}
|
|
case RocksDBLogType::DocumentRemove: {
|
|
_removeDocumentKey = RocksDBLogValue::documentKey(blob).toString();
|
|
break;
|
|
}
|
|
case RocksDBLogType::SingleRemove: {
|
|
_removeDocumentKey = RocksDBLogValue::documentKey(blob).toString();
|
|
// intentional fall through
|
|
}
|
|
case RocksDBLogType::SinglePut: {
|
|
_singleOpTransaction = true;
|
|
_currentDbId = RocksDBLogValue::databaseId(blob);
|
|
_currentCollectionId = RocksDBLogValue::collectionId(blob);
|
|
_currentTrxId = 0;
|
|
break;
|
|
}
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
void Put(rocksdb::Slice const& key, rocksdb::Slice const& value) override {
|
|
if (!shouldHandleKey(key)) {
|
|
return;
|
|
}
|
|
switch (RocksDBKey::type(key)) {
|
|
case RocksDBEntryType::Collection: {
|
|
if (_lastLogType == RocksDBLogType::IndexCreate ||
|
|
_lastLogType == RocksDBLogType::IndexDrop) {
|
|
return;
|
|
}
|
|
TRI_ASSERT(_lastLogType == RocksDBLogType::CollectionCreate ||
|
|
_lastLogType == RocksDBLogType::CollectionChange ||
|
|
_lastLogType == RocksDBLogType::CollectionRename);
|
|
TRI_ASSERT(_currentDbId != 0 && _currentCollectionId != 0);
|
|
_builder.openObject();
|
|
_builder.add("tick", VPackValue(std::to_string(_currentSequence)));
|
|
_builder.add("type", VPackValue(convertLogType(_lastLogType)));
|
|
_builder.add("database", VPackValue(std::to_string(_currentDbId)));
|
|
_builder.add("cid", VPackValue(std::to_string(_currentCollectionId)));
|
|
|
|
if (_lastLogType == RocksDBLogType::CollectionRename) {
|
|
VPackSlice collectionData(value.data());
|
|
_builder.add("data", VPackValue(VPackValueType::Object));
|
|
_builder.add("id", VPackValue(std::to_string(_currentCollectionId)));
|
|
_builder.add("oldName", VPackValue(_oldCollectionName));
|
|
_builder.add("name", collectionData.get("name"));
|
|
_builder.close();
|
|
} else { // change and create need full data
|
|
_builder.add("data", RocksDBValue::data(value));
|
|
}
|
|
_builder.close();
|
|
break;
|
|
}
|
|
case RocksDBEntryType::Document: {
|
|
TRI_ASSERT(_seenBeginTransaction || _singleOpTransaction);
|
|
TRI_ASSERT(!_seenBeginTransaction || _currentTrxId != 0);
|
|
TRI_ASSERT(_currentDbId != 0 && _currentCollectionId != 0);
|
|
|
|
_builder.openObject();
|
|
_builder.add("tick", VPackValue(std::to_string(_currentSequence)));
|
|
_builder.add("type", VPackValue(REPLICATION_MARKER_DOCUMENT));
|
|
// auto containers = getContainerIds(key);
|
|
_builder.add("database", VPackValue(std::to_string(_currentDbId)));
|
|
_builder.add("cid", VPackValue(std::to_string(_currentCollectionId)));
|
|
if (_singleOpTransaction) { // single op is defined to 0
|
|
_builder.add("tid", VPackValue("0"));
|
|
} else {
|
|
_builder.add("tid", VPackValue(std::to_string(_currentTrxId)));
|
|
}
|
|
_builder.add("data", RocksDBValue::data(value));
|
|
_builder.close();
|
|
|
|
break;
|
|
}
|
|
default:
|
|
break; // shouldn't get here?
|
|
}
|
|
|
|
if (_limit > 0) {
|
|
_limit--;
|
|
}
|
|
}
|
|
|
|
void Delete(rocksdb::Slice const& key) override { handleDeletion(key); }
|
|
|
|
void SingleDelete(rocksdb::Slice const& key) override { handleDeletion(key); }
|
|
|
|
void handleDeletion(rocksdb::Slice const& key) {
|
|
switch (RocksDBKey::type(key)) {
|
|
case RocksDBEntryType::Collection: {
|
|
TRI_ASSERT(_lastLogType == RocksDBLogType::CollectionDrop);
|
|
TRI_ASSERT(_currentDbId != 0 && _currentCollectionId != 0);
|
|
|
|
_builder.openObject();
|
|
_builder.add("tick", VPackValue(std::to_string(_currentSequence)));
|
|
_builder.add("type", VPackValue(REPLICATION_COLLECTION_DROP));
|
|
_builder.add("database", VPackValue(std::to_string(_currentDbId)));
|
|
_builder.add("cid", VPackValue(std::to_string(_currentCollectionId)));
|
|
_builder.add("data", VPackValue(VPackValueType::Object));
|
|
_builder.add("id", VPackValue(std::to_string(_currentCollectionId)));
|
|
_builder.add("name", VPackValue("")); // not used at all
|
|
_builder.close();
|
|
_builder.close();
|
|
break;
|
|
}
|
|
case RocksDBEntryType::Document: {
|
|
// document removes, because of a drop is not transactional and
|
|
// should not appear in the WAL
|
|
if (!shouldHandleKey(key) ||
|
|
!(_seenBeginTransaction || _singleOpTransaction)) {
|
|
return;
|
|
}
|
|
|
|
TRI_ASSERT(!_seenBeginTransaction || _currentTrxId != 0);
|
|
TRI_ASSERT(_currentDbId != 0 && _currentCollectionId != 0);
|
|
TRI_ASSERT(!_removeDocumentKey.empty());
|
|
|
|
uint64_t revisionId = RocksDBKey::revisionId(key);
|
|
_builder.openObject();
|
|
_builder.add("tick", VPackValue(std::to_string(_currentSequence)));
|
|
_builder.add(
|
|
"type",
|
|
VPackValue(static_cast<uint64_t>(REPLICATION_MARKER_REMOVE)));
|
|
_builder.add("database", VPackValue(std::to_string(_currentDbId)));
|
|
_builder.add("cid", VPackValue(std::to_string(_currentCollectionId)));
|
|
if (_singleOpTransaction) { // single op is defined to 0
|
|
_builder.add("tid", VPackValue("0"));
|
|
} else {
|
|
_builder.add("tid", VPackValue(std::to_string(_currentTrxId)));
|
|
}
|
|
_builder.add("data", VPackValue(VPackValueType::Object));
|
|
_builder.add(StaticStrings::KeyString, VPackValue(_removeDocumentKey));
|
|
_builder.add(StaticStrings::RevString,
|
|
VPackValue(std::to_string(revisionId)));
|
|
_builder.close();
|
|
_builder.close();
|
|
break;
|
|
}
|
|
default:
|
|
break; // shouldn't get here?
|
|
}
|
|
|
|
if (_limit > 0) {
|
|
_limit--;
|
|
}
|
|
}
|
|
|
|
void startNewBatch(rocksdb::SequenceNumber currentSequence) {
|
|
// starting new write batch
|
|
// TODO: reset state?
|
|
_lastLogType = RocksDBLogType::Invalid;
|
|
_seenBeginTransaction = false;
|
|
_singleOpTransaction = false;
|
|
_currentSequence = currentSequence;
|
|
_currentDbId = 0;
|
|
_currentTrxId = 0;
|
|
_currentCollectionId = 0;
|
|
_oldCollectionName.clear();
|
|
_removeDocumentKey.clear();
|
|
}
|
|
|
|
void endBatch() {
|
|
if (_seenBeginTransaction) {
|
|
_builder.openObject();
|
|
_builder.add("tick", VPackValue(std::to_string(_currentSequence)));
|
|
_builder.add(
|
|
"type",
|
|
VPackValue(static_cast<uint64_t>(REPLICATION_TRANSACTION_COMMIT)));
|
|
_builder.add("database", VPackValue(std::to_string(_currentDbId)));
|
|
_builder.add("tid", VPackValue(std::to_string(_currentTrxId)));
|
|
_builder.close();
|
|
}
|
|
_seenBeginTransaction = false;
|
|
_singleOpTransaction = false;
|
|
}
|
|
|
|
private:
|
|
bool shouldHandleKey(rocksdb::Slice const& key) {
|
|
if (_limit == 0) {
|
|
return false;
|
|
} else if (_includeSystem) {
|
|
return true;
|
|
}
|
|
|
|
TRI_voc_cid_t cid;
|
|
switch (RocksDBKey::type(key)) {
|
|
case RocksDBEntryType::Collection: {
|
|
cid = RocksDBKey::collectionId(key);
|
|
break;
|
|
}
|
|
case RocksDBEntryType::Document: {
|
|
uint64_t objectId = RocksDBKey::objectId(key);
|
|
auto mapping = mapObjectToCollection(objectId);
|
|
if (mapping.first != _vocbase->id()) {
|
|
return false;
|
|
}
|
|
cid = mapping.second;
|
|
}
|
|
case RocksDBEntryType::View: // should handle these eventually?
|
|
default:
|
|
return false;
|
|
}
|
|
|
|
// allow document removes of dropped collections
|
|
std::string const collectionName = _vocbase->collectionName(cid);
|
|
if (collectionName.size() == 0) {
|
|
return true;
|
|
}
|
|
if (!_includeSystem && collectionName[0] == '_') {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
private:
|
|
TRI_vocbase_t* _vocbase;
|
|
uint64_t _from;
|
|
size_t& _limit;
|
|
bool _includeSystem;
|
|
VPackBuilder& _builder;
|
|
|
|
rocksdb::SequenceNumber _currentSequence;
|
|
RocksDBLogType _lastLogType = RocksDBLogType::Invalid;
|
|
bool _seenBeginTransaction = false;
|
|
bool _singleOpTransaction = false;
|
|
TRI_voc_tick_t _currentDbId = 0;
|
|
TRI_voc_tick_t _currentTrxId = 0;
|
|
TRI_voc_cid_t _currentCollectionId = 0;
|
|
std::string _oldCollectionName;
|
|
std::string _removeDocumentKey;
|
|
VPackSlice _indexSlice;
|
|
};
|
|
|
|
// iterates over WAL starting at 'from' and returns up to 'limit' documents
|
|
// from the corresponding database
|
|
RocksDBReplicationResult rocksutils::tailWal(TRI_vocbase_t* vocbase,
|
|
uint64_t from, size_t limit,
|
|
bool includeSystem,
|
|
VPackBuilder& builder) {
|
|
|
|
uint64_t lastTick = from;
|
|
std::unique_ptr<WALParser> handler(
|
|
new WALParser(vocbase, from, limit, includeSystem, builder));
|
|
std::unique_ptr<rocksdb::TransactionLogIterator> iterator; // reader();
|
|
rocksdb::Status s = static_cast<rocksdb::DB*>(globalRocksDB())
|
|
->GetUpdatesSince(from, &iterator);
|
|
if (!s.ok()) { // TODO do something?
|
|
auto converted = convertStatus(s);
|
|
return {converted.errorNumber(), lastTick};
|
|
}
|
|
|
|
bool fromTickIncluded = false;
|
|
while (iterator->Valid() && limit > 0) {
|
|
s = iterator->status();
|
|
if (s.ok()) {
|
|
rocksdb::BatchResult batch = iterator->GetBatch();
|
|
lastTick = batch.sequence;
|
|
if (lastTick == from) {
|
|
fromTickIncluded = true;
|
|
}
|
|
handler->startNewBatch(batch.sequence);
|
|
s = batch.writeBatchPtr->Iterate(handler.get());
|
|
if (s.ok()) {
|
|
handler->endBatch();
|
|
}
|
|
} else {
|
|
LOG_TOPIC(ERR, Logger::ENGINES) << "error during WAL scan";
|
|
auto converted = convertStatus(s);
|
|
auto result = RocksDBReplicationResult(converted.errorNumber(), lastTick);
|
|
if (fromTickIncluded) {
|
|
result.includeFromTick();
|
|
}
|
|
return result;
|
|
}
|
|
|
|
iterator->Next();
|
|
}
|
|
|
|
auto result = RocksDBReplicationResult(TRI_ERROR_NO_ERROR, lastTick);
|
|
if (fromTickIncluded) {
|
|
result.includeFromTick();
|
|
}
|
|
|
|
return result;
|
|
}
|