/*
* 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.requests;
import java.io.DataInput;
import java.io.IOException;
import org.apache.giraph.comm.GlobalCommType;
import org.apache.giraph.comm.ServerData;
import org.apache.giraph.comm.aggregators.OwnerAggregatorServerData;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Writable;
/**
* Request to send partial aggregated values for current superstep (values
* which were computed by one worker's vertices)
*/
public class SendWorkerAggregatorsRequest extends
ByteArrayWithSenderTaskIdRequest implements WorkerRequest {
/**
* Constructor
*
* @param data Serialized aggregator data
* @param senderTaskId Sender task id
*/
public SendWorkerAggregatorsRequest(byte[] data, int senderTaskId) {
super(data, senderTaskId);
}
/**
* Constructor used for reflection only
*/
public SendWorkerAggregatorsRequest() {
}
@Override
public void doRequest(ServerData serverData) {
DataInput input = getDataInput();
OwnerAggregatorServerData aggregatorData =
serverData.getOwnerAggregatorData();
try {
int num = input.readInt();
for (int i = 0; i < num; i++) {
String name = input.readUTF();
GlobalCommType type = GlobalCommType.values()[input.readByte()];
if (type == GlobalCommType.SPECIAL_COUNT) {
LongWritable value = new LongWritable();
value.readFields(input);
aggregatorData.receivedRequestCountFromWorker(
value.get(),
getSenderTaskId());
} else if (type == GlobalCommType.REDUCED_VALUE) {
Writable value = aggregatorData.createInitialValue(name);
value.readFields(input);
aggregatorData.reduce(name, value);
} else {
throw new IllegalStateException(
"SendWorkerAggregatorsRequest received " + type);
}
}
} catch (IOException e) {
throw new IllegalStateException("doRequest: " +
"IOException occurred while processing request", e);
}
aggregatorData.receivedRequestFromWorker();
}
@Override
public RequestType getType() {
return RequestType.SEND_WORKER_AGGREGATORS_REQUEST;
}
}