| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| package org.apache.giraph.comm.messages; |
| |
| import com.google.common.collect.Iterators; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| import java.util.concurrent.ConcurrentMap; |
| |
| import org.apache.giraph.bsp.CentralizedServiceWorker; |
| import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration; |
| import org.apache.giraph.conf.MessageClasses; |
| import org.apache.giraph.factories.MessageValueFactory; |
| import org.apache.giraph.utils.RepresentativeByteStructIterator; |
| import org.apache.giraph.utils.VerboseByteStructMessageWrite; |
| import org.apache.giraph.utils.VertexIdIterator; |
| import org.apache.giraph.utils.VertexIdMessageBytesIterator; |
| import org.apache.giraph.utils.VertexIdMessageIterator; |
| import org.apache.giraph.utils.VertexIdMessages; |
| import org.apache.giraph.utils.WritableUtils; |
| import org.apache.giraph.utils.io.DataInputOutput; |
| import org.apache.hadoop.io.Writable; |
| import org.apache.hadoop.io.WritableComparable; |
| |
| /** |
| * Implementation of {@link SimpleMessageStore} where multiple messages are |
| * stored per vertex as byte backed datastructures. |
| * Used when there is no combiner provided. |
| * |
| * @param <I> Vertex id |
| * @param <M> Message data |
| */ |
| public class ByteArrayMessagesPerVertexStore<I extends WritableComparable, |
| M extends Writable> extends SimpleMessageStore<I, M, DataInputOutput> { |
| /** |
| * Constructor |
| * |
| * @param messageValueFactory Message class held in the store |
| * @param partitionInfo Partition split info |
| * @param config Hadoop configuration |
| */ |
| public ByteArrayMessagesPerVertexStore( |
| MessageValueFactory<M> messageValueFactory, |
| PartitionSplitInfo<I> partitionInfo, |
| ImmutableClassesGiraphConfiguration<I, ?, ?> config) { |
| super(messageValueFactory, partitionInfo, config); |
| } |
| |
| @Override |
| public boolean isPointerListEncoding() { |
| return false; |
| } |
| |
| /** |
| * Get the extended data output for a vertex id from the iterator, creating |
| * if necessary. This method will take ownership of the vertex id from the |
| * iterator if necessary (if used in the partition map entry). |
| * |
| * @param partitionMap Partition map to look in |
| * @param iterator Special iterator that can release ownerhips of vertex ids |
| * @return Extended data output for this vertex id (created if necessary) |
| */ |
| private DataInputOutput getDataInputOutput( |
| ConcurrentMap<I, DataInputOutput> partitionMap, |
| VertexIdIterator<I> iterator) { |
| DataInputOutput dataInputOutput = |
| partitionMap.get(iterator.getCurrentVertexId()); |
| if (dataInputOutput == null) { |
| DataInputOutput newDataOutput = config.createMessagesInputOutput(); |
| dataInputOutput = partitionMap.putIfAbsent( |
| iterator.releaseCurrentVertexId(), newDataOutput); |
| if (dataInputOutput == null) { |
| dataInputOutput = newDataOutput; |
| } |
| } |
| return dataInputOutput; |
| } |
| |
| @Override |
| public void addPartitionMessages( |
| int partitionId, VertexIdMessages<I, M> messages) { |
| ConcurrentMap<I, DataInputOutput> partitionMap = |
| getOrCreatePartitionMap(partitionId); |
| VertexIdMessageBytesIterator<I, M> vertexIdMessageBytesIterator = |
| messages.getVertexIdMessageBytesIterator(); |
| // Try to copy the message buffer over rather than |
| // doing a deserialization of a message just to know its size. This |
| // should be more efficient for complex objects where serialization is |
| // expensive. If this type of iterator is not available, fall back to |
| // deserializing/serializing the messages |
| if (vertexIdMessageBytesIterator != null) { |
| while (vertexIdMessageBytesIterator.hasNext()) { |
| vertexIdMessageBytesIterator.next(); |
| DataInputOutput dataInputOutput = |
| getDataInputOutput(partitionMap, vertexIdMessageBytesIterator); |
| |
| synchronized (dataInputOutput) { |
| vertexIdMessageBytesIterator.writeCurrentMessageBytes( |
| dataInputOutput.getDataOutput()); |
| } |
| } |
| } else { |
| try { |
| VertexIdMessageIterator<I, M> vertexIdMessageIterator = |
| messages.getVertexIdMessageIterator(); |
| while (vertexIdMessageIterator.hasNext()) { |
| vertexIdMessageIterator.next(); |
| DataInputOutput dataInputOutput = |
| getDataInputOutput(partitionMap, vertexIdMessageIterator); |
| |
| synchronized (dataInputOutput) { |
| VerboseByteStructMessageWrite.verboseWriteCurrentMessage( |
| vertexIdMessageIterator, dataInputOutput.getDataOutput()); |
| } |
| } |
| } catch (IOException e) { |
| throw new RuntimeException("addPartitionMessages: IOException while" + |
| " adding messages for a partition: " + e); |
| } |
| } |
| } |
| |
| @Override |
| public void addMessage(I vertexId, M message) throws IOException { |
| ConcurrentMap<I, DataInputOutput> partitionMap = |
| getOrCreatePartitionMap(getPartitionId(vertexId)); |
| DataInputOutput dataInputOutput = partitionMap.get(vertexId); |
| if (dataInputOutput == null) { |
| DataInputOutput newDataOutput = config.createMessagesInputOutput(); |
| I copyId = WritableUtils.createCopy(vertexId); |
| dataInputOutput = partitionMap.putIfAbsent(copyId, newDataOutput); |
| if (dataInputOutput == null) { |
| dataInputOutput = newDataOutput; |
| } |
| } |
| |
| synchronized (dataInputOutput) { |
| VerboseByteStructMessageWrite.verboseWriteCurrentMessage( |
| vertexId, message, dataInputOutput.getDataOutput()); |
| } |
| } |
| |
| @Override |
| protected Iterable<M> getMessagesAsIterable( |
| DataInputOutput dataInputOutput) { |
| return new MessagesIterable<M>(dataInputOutput, messageValueFactory); |
| } |
| |
| @Override |
| protected int getNumberOfMessagesIn( |
| ConcurrentMap<I, DataInputOutput> partitionMap) { |
| int numberOfMessages = 0; |
| for (DataInputOutput dataInputOutput : partitionMap.values()) { |
| numberOfMessages += Iterators.size( |
| new RepresentativeByteStructIterator<M>( |
| dataInputOutput.createDataInput()) { |
| @Override |
| protected M createWritable() { |
| return messageValueFactory.newInstance(); |
| } |
| }); |
| } |
| return numberOfMessages; |
| } |
| |
| @Override |
| protected void writeMessages(DataInputOutput dataInputOutput, |
| DataOutput out) throws IOException { |
| dataInputOutput.write(out); |
| } |
| |
| @Override |
| protected DataInputOutput readFieldsForMessages(DataInput in) throws |
| IOException { |
| DataInputOutput dataInputOutput = config.createMessagesInputOutput(); |
| dataInputOutput.readFields(in); |
| return dataInputOutput; |
| } |
| |
| /** |
| * Create new factory for this message store |
| * |
| * @param service Worker service |
| * @param config Hadoop configuration |
| * @param <I> Vertex id |
| * @param <M> Message data |
| * @return Factory |
| */ |
| public static <I extends WritableComparable, M extends Writable> |
| MessageStoreFactory<I, M, MessageStore<I, M>> newFactory( |
| CentralizedServiceWorker<I, ?, ?> service, |
| ImmutableClassesGiraphConfiguration<I, ?, ?> config) { |
| return new Factory<I, M>(service, config); |
| } |
| |
| /** |
| * Factory for {@link ByteArrayMessagesPerVertexStore} |
| * |
| * @param <I> Vertex id |
| * @param <M> Message data |
| */ |
| public static class Factory<I extends WritableComparable, M extends Writable> |
| implements MessageStoreFactory<I, M, MessageStore<I, M>> { |
| /** Service worker */ |
| private PartitionSplitInfo<I> partitionInfo; |
| /** Hadoop configuration */ |
| private ImmutableClassesGiraphConfiguration<I, ?, ?> config; |
| |
| /** Constructor for reflection */ |
| public Factory() { } |
| |
| /** |
| * @param partitionInfo Partition split info |
| * @param config Hadoop configuration |
| */ |
| public Factory( |
| PartitionSplitInfo<I> partitionInfo, |
| ImmutableClassesGiraphConfiguration<I, ?, ?> config |
| ) { |
| this.partitionInfo = partitionInfo; |
| this.config = config; |
| } |
| |
| @Override |
| public MessageStore<I, M> newStore( |
| MessageClasses<I, M> messageClasses) { |
| return new ByteArrayMessagesPerVertexStore<I, M>( |
| messageClasses.createMessageValueFactory(config), |
| partitionInfo, config); |
| } |
| |
| @Override |
| public void initialize(PartitionSplitInfo<I> partitionInfo, |
| ImmutableClassesGiraphConfiguration<I, ?, ?> conf) { |
| this.partitionInfo = partitionInfo; |
| this.config = conf; |
| } |
| } |
| |
| } |