mirror of https://gitee.com/bigwinds/arangodb
109 lines
3.1 KiB
C++
109 lines
3.1 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2016 ArangoDB GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Simon Grätzer
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////////////////////////////////////////////////////////////////////////////////
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#include "IncomingCache.h"
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#include "Utils.h"
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#include "Basics/MutexLocker.h"
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#include "Basics/StaticStrings.h"
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#include "Basics/VelocyPackHelper.h"
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#include <velocypack/Iterator.h>
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#include <velocypack/velocypack-aliases.h>
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using namespace arangodb;
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using namespace arangodb::pregel;
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template <typename M>
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IncomingCache<M>::~IncomingCache() {
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LOG(INFO) << "~IncomingCache";
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_messages.clear();
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}
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template <typename M>
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void IncomingCache<M>::clear() {
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/*for (auto const& it : _messages) {
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it.second->clear();
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}*/
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_receivedMessageCount = 0;
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_messages.clear();
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}
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template <typename M>
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void IncomingCache<M>::parseMessages(VPackSlice incomingMessages) {
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VPackValueLength length = incomingMessages.length();
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if (length % 2) {
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THROW_ARANGO_EXCEPTION_MESSAGE(
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TRI_ERROR_BAD_PARAMETER,
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"There must always be an even number of entries in messages");
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}
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VPackValueLength i = 0;
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std::string toValue;
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for (i = 0; i < length; i++) {
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VPackSlice current = incomingMessages.at(i);
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if (i % 2 == 0) { // TODO support multiple recipients
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toValue = current.copyString();
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} else {
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M newValue;
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bool sucess = _format->unwrapValue(current, newValue);
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if (!sucess) {
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LOG(WARN) << "Invalid message format supplied";
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continue;
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}
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setDirect(toValue, newValue);
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}
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}
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}
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template <typename M>
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void IncomingCache<M>::setDirect(std::string const& toValue,
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M const& newValue) {
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{
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CONDITION_LOCKER(guard, _writeCondition);
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_receivedMessageCount++;
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auto vmsg = _messages.find(toValue);
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if (vmsg != _messages.end()) { // got a message for the same vertex
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vmsg->second = _combiner->combine(vmsg->second, newValue);
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} else {
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_messages[toValue] = newValue;
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}
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}
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_writeCondition.signal();
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}
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template <typename M>
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MessageIterator<M> IncomingCache<M>::getMessages(std::string const& vertexId) {
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LOG(INFO) << "Querying messages for " << vertexId;
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auto vmsg = _messages.find(vertexId);
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if (vmsg != _messages.end()) {
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return MessageIterator<M>(&vmsg->second);
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} else {
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return MessageIterator<M>();
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}
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}
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// template types to create
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template class arangodb::pregel::IncomingCache<int64_t>;
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template class arangodb::pregel::IncomingCache<float>;
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