/*
* 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.map.impl.client;
import static com.hazelcast.map.impl.MapService.SERVICE_NAME;
import com.hazelcast.client.ClientEndpoint;
import com.hazelcast.client.impl.client.InvocationClientRequest;
import com.hazelcast.client.impl.client.RetryableRequest;
import com.hazelcast.client.impl.client.SecureRequest;
import com.hazelcast.instance.MemberImpl;
import com.hazelcast.map.impl.MapPortableHook;
import com.hazelcast.map.impl.MapService;
import com.hazelcast.map.impl.QueryResult;
import com.hazelcast.map.impl.operation.QueryOperation;
import com.hazelcast.map.impl.operation.QueryPartitionOperation;
import com.hazelcast.nio.serialization.Portable;
import com.hazelcast.nio.serialization.PortableReader;
import com.hazelcast.nio.serialization.PortableWriter;
import com.hazelcast.query.Predicate;
import com.hazelcast.security.permission.ActionConstants;
import com.hazelcast.security.permission.MapPermission;
import com.hazelcast.util.ExceptionUtil;
import com.hazelcast.util.IterationType;
import com.hazelcast.util.QueryResultSet;
import java.io.IOException;
import java.security.Permission;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.Future;
abstract class AbstractMapQueryRequest extends InvocationClientRequest implements Portable,
RetryableRequest, SecureRequest {
protected IterationType iterationType;
private String name;
public AbstractMapQueryRequest() {
}
public AbstractMapQueryRequest(String name, IterationType iterationType) {
this.name = name;
this.iterationType = iterationType;
}
@Override
protected final void invoke() {
Collection<MemberImpl> members = getClientEngine().getClusterService().getMemberList();
int partitionCount = getClientEngine().getPartitionService().getPartitionCount();
Set<Integer> plist = new HashSet<Integer>(partitionCount);
final ClientEndpoint endpoint = getEndpoint();
QueryResultSet result = new QueryResultSet(null, iterationType, true);
try {
List<Future> futures = new ArrayList<Future>();
final Predicate predicate = getPredicate();
createInvocations(members, futures, predicate);
collectResults(plist, result, futures);
if (hasMissingPartitions(partitionCount, plist)) {
List<Integer> missingList = findMissingPartitions(partitionCount, plist);
List<Future> missingFutures = new ArrayList<Future>(missingList.size());
createInvocationsForMissingPartitions(predicate, missingList, missingFutures);
collectResultsFromMissingPartitions(result, missingFutures);
}
} catch (Throwable t) {
throw ExceptionUtil.rethrow(t);
}
endpoint.sendResponse(result, getCallId());
}
private boolean hasMissingPartitions(int partitionCount, Set<Integer> plist) {
return plist.size() != partitionCount;
}
private void collectResultsFromMissingPartitions(QueryResultSet result, List<Future> futures)
throws InterruptedException, java.util.concurrent.ExecutionException {
for (Future future : futures) {
QueryResult queryResult = (QueryResult) future.get();
result.addAll(queryResult.getResult());
}
}
private void createInvocationsForMissingPartitions(Predicate predicate, List<Integer> missingList,
List<Future> futures) {
for (Integer pid : missingList) {
QueryPartitionOperation queryPartitionOperation = new QueryPartitionOperation(name, predicate);
queryPartitionOperation.setPartitionId(pid);
try {
Future f = createInvocationBuilder(SERVICE_NAME, queryPartitionOperation, pid).invoke();
futures.add(f);
} catch (Throwable t) {
throw ExceptionUtil.rethrow(t);
}
}
}
private List<Integer> findMissingPartitions(int partitionCount, Set<Integer> plist) {
List<Integer> missingList = new ArrayList<Integer>();
for (int i = 0; i < partitionCount; i++) {
if (!plist.contains(i)) {
missingList.add(i);
}
}
return missingList;
}
private void collectResults(Set<Integer> plist, QueryResultSet result, List<Future> flist)
throws InterruptedException, java.util.concurrent.ExecutionException {
for (Future future : flist) {
QueryResult queryResult = (QueryResult) future.get();
if (queryResult != null) {
final Collection<Integer> partitionIds = queryResult.getPartitionIds();
if (partitionIds != null) {
plist.addAll(partitionIds);
result.addAll(queryResult.getResult());
}
}
}
}
private void createInvocations(Collection<MemberImpl> members, List<Future> flist, Predicate predicate) {
for (MemberImpl member : members) {
Future future = createInvocationBuilder(SERVICE_NAME, new QueryOperation(name, predicate),
member.getAddress()).invoke();
flist.add(future);
}
}
protected abstract Predicate getPredicate();
public final String getServiceName() {
return MapService.SERVICE_NAME;
}
public final int getFactoryId() {
return MapPortableHook.F_ID;
}
public void write(PortableWriter writer) throws IOException {
writer.writeUTF("n", name);
writer.writeUTF("t", iterationType.toString());
writePortableInner(writer);
}
protected abstract void writePortableInner(PortableWriter writer) throws IOException;
public void read(PortableReader reader) throws IOException {
name = reader.readUTF("n");
iterationType = IterationType.valueOf(reader.readUTF("t"));
readPortableInner(reader);
}
protected abstract void readPortableInner(PortableReader reader) throws IOException;
public Permission getRequiredPermission() {
return new MapPermission(name, ActionConstants.ACTION_READ);
}
@Override
public String getDistributedObjectName() {
return name;
}
}