com.hazelcast.spi.impl.PartitionIteratingOperation Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2013, Hazelcast, Inc. All Rights Reserved.
*
* 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.
*/
package com.hazelcast.spi.impl;
import com.hazelcast.logging.ILogger;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.IdentifiedDataSerializable;
import com.hazelcast.spi.AbstractOperation;
import com.hazelcast.spi.NodeEngine;
import com.hazelcast.spi.Operation;
import com.hazelcast.spi.OperationAccessor;
import com.hazelcast.spi.OperationFactory;
import com.hazelcast.spi.ResponseHandler;
import com.hazelcast.util.ResponseQueueFactory;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.BlockingQueue;
public final class PartitionIteratingOperation extends AbstractOperation implements IdentifiedDataSerializable {
private List partitions;
private OperationFactory operationFactory;
private Map results;
public PartitionIteratingOperation(List partitions, OperationFactory operationFactory) {
this.partitions = partitions != null ? partitions : Collections.emptyList();
this.operationFactory = operationFactory;
}
public PartitionIteratingOperation() {
}
public final void run() throws Exception {
final NodeEngine nodeEngine = getNodeEngine();
results = new HashMap(partitions.size());
try {
Map responses = new HashMap(partitions.size());
for (final int partitionId : partitions) {
ResponseQueue responseQueue = new ResponseQueue();
final Operation op = operationFactory.createOperation();
op.setNodeEngine(nodeEngine)
.setPartitionId(partitionId)
.setReplicaIndex(getReplicaIndex())
.setResponseHandler(responseQueue)
.setServiceName(getServiceName())
.setService(getService())
.setCallerUuid(getCallerUuid());
OperationAccessor.setCallerAddress(op, getCallerAddress());
responses.put(partitionId, responseQueue);
nodeEngine.getOperationService().executeOperation(op);
}
for (Map.Entry responseQueueEntry : responses.entrySet()) {
final ResponseQueue queue = responseQueueEntry.getValue();
final Integer key = responseQueueEntry.getKey();
final Object result = queue.get();
if (result instanceof NormalResponse) {
results.put(key, ((NormalResponse) result).getValue());
} else {
results.put(key, result);
}
}
} catch (Exception e) {
getLogger(nodeEngine).severe(e);
}
}
@Override
public void afterRun() throws Exception {
}
private ILogger getLogger(NodeEngine nodeEngine) {
return nodeEngine.getLogger(PartitionIteratingOperation.class.getName());
}
@Override
public final Object getResponse() {
return new PartitionResponse(results);
}
@Override
public final boolean returnsResponse() {
return true;
}
private static class ResponseQueue implements ResponseHandler {
final BlockingQueue b = ResponseQueueFactory.newResponseQueue();
@Override
public void sendResponse(Object obj) {
b.offer(obj);
}
public Object get() throws InterruptedException {
return b.take();
}
@Override
public boolean isLocal() {
return true;
}
}
// To make serialization of HashMap faster.
public final static class PartitionResponse implements IdentifiedDataSerializable {
private Map results;
public PartitionResponse() {
}
public PartitionResponse(Map results) {
this.results = results != null ? results : Collections.emptyMap();
}
@Override
public void writeData(ObjectDataOutput out) throws IOException {
int len = results != null ? results.size() : 0;
out.writeInt(len);
if (len > 0) {
for (Map.Entry entry : results.entrySet()) {
out.writeInt(entry.getKey());
out.writeObject(entry.getValue());
}
}
}
@Override
public void readData(ObjectDataInput in) throws IOException {
int len = in.readInt();
if (len > 0) {
results = new HashMap(len);
for (int i = 0; i < len; i++) {
int pid = in.readInt();
Object value = in.readObject();
results.put(pid, value);
}
} else {
results = Collections.emptyMap();
}
}
public Map asMap() {
return results;
}
@Override
public int getFactoryId() {
return SpiDataSerializerHook.F_ID;
}
@Override
public int getId() {
return SpiDataSerializerHook.PARTITION_RESPONSE;
}
}
@Override
protected void writeInternal(ObjectDataOutput out) throws IOException {
super.writeInternal(out);
int pCount = partitions.size();
out.writeInt(pCount);
for (Integer partition : partitions) {
out.writeInt(partition);
}
out.writeObject(operationFactory);
}
@Override
protected void readInternal(ObjectDataInput in) throws IOException {
super.readInternal(in);
int pCount = in.readInt();
partitions = new ArrayList(pCount);
for (int i = 0; i < pCount; i++) {
partitions.add(in.readInt());
}
operationFactory = in.readObject();
}
@Override
public int getFactoryId() {
return SpiDataSerializerHook.F_ID;
}
@Override
public int getId() {
return SpiDataSerializerHook.PARTITION_ITERATOR;
}
}