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/*
* Copyright (c) 2008-2020, 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.client.proxy;
import com.hazelcast.client.impl.clientside.ClientMessageDecoder;
import com.hazelcast.client.impl.protocol.ClientMessage;
import com.hazelcast.client.impl.protocol.codec.DurableExecutorDisposeResultCodec;
import com.hazelcast.client.impl.protocol.codec.DurableExecutorIsShutdownCodec;
import com.hazelcast.client.impl.protocol.codec.DurableExecutorRetrieveAndDisposeResultCodec;
import com.hazelcast.client.impl.protocol.codec.DurableExecutorRetrieveResultCodec;
import com.hazelcast.client.impl.protocol.codec.DurableExecutorShutdownCodec;
import com.hazelcast.client.impl.protocol.codec.DurableExecutorSubmitToPartitionCodec;
import com.hazelcast.client.spi.ClientContext;
import com.hazelcast.client.spi.ClientPartitionService;
import com.hazelcast.client.spi.ClientProxy;
import com.hazelcast.client.spi.impl.ClientInvocation;
import com.hazelcast.client.spi.impl.ClientInvocationFuture;
import com.hazelcast.client.util.ClientDelegatingFuture;
import com.hazelcast.core.ExecutionCallback;
import com.hazelcast.core.PartitionAware;
import com.hazelcast.durableexecutor.DurableExecutorService;
import com.hazelcast.durableexecutor.DurableExecutorServiceFuture;
import com.hazelcast.executor.impl.RunnableAdapter;
import com.hazelcast.nio.Bits;
import com.hazelcast.spi.serialization.SerializationService;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Random;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Executor;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import static com.hazelcast.util.Preconditions.checkNotNull;
/**
* Proxy implementation of {@link DurableExecutorService}.
*/
public final class ClientDurableExecutorServiceProxy extends ClientProxy implements DurableExecutorService {
private static final ClientMessageDecoder RETRIEVE_RESPONSE_DECODER = new ClientMessageDecoder() {
@Override
public T decodeClientMessage(ClientMessage clientMessage) {
return (T) DurableExecutorRetrieveResultCodec.decodeResponse(clientMessage).response;
}
};
private final Random random = new Random();
private int partitionCount;
public ClientDurableExecutorServiceProxy(String serviceName, String name, ClientContext context) {
super(serviceName, name, context);
}
@Override
protected void onInitialize() {
ClientPartitionService partitionService = getContext().getPartitionService();
partitionCount = partitionService.getPartitionCount();
}
@Override
public Future retrieveResult(long taskId) {
int partitionId = Bits.extractInt(taskId, false);
int sequence = Bits.extractInt(taskId, true);
ClientMessage clientMessage = DurableExecutorRetrieveResultCodec.encodeRequest(name, sequence);
ClientInvocationFuture future = new ClientInvocation(getClient(), clientMessage, getName(), partitionId).invoke();
return new ClientDelegatingFuture(future, getSerializationService(), RETRIEVE_RESPONSE_DECODER);
}
@Override
public void disposeResult(long taskId) {
int partitionId = Bits.extractInt(taskId, false);
int sequence = Bits.extractInt(taskId, true);
ClientMessage clientMessage = DurableExecutorDisposeResultCodec.encodeRequest(name, sequence);
invokeOnPartition(clientMessage, partitionId);
}
@Override
public Future retrieveAndDisposeResult(long taskId) {
int partitionId = Bits.extractInt(taskId, false);
int sequence = Bits.extractInt(taskId, true);
ClientMessage clientMessage = DurableExecutorRetrieveAndDisposeResultCodec.encodeRequest(name, sequence);
ClientInvocationFuture future = new ClientInvocation(getClient(), clientMessage, getName(), partitionId).invoke();
return new ClientDelegatingFuture(future, getSerializationService(), RETRIEVE_RESPONSE_DECODER);
}
@Override
public void execute(Runnable task) {
int partitionId = getTaskPartitionId(task);
Callable callable = createRunnableAdapter(task);
submitToPartition(callable, partitionId, null);
}
@Override
public void executeOnKeyOwner(Runnable task, Object key) {
int partitionId = getPartitionId(key);
Callable callable = createRunnableAdapter(task);
submitToPartition(callable, partitionId, null);
}
@Override
public DurableExecutorServiceFuture submitToKeyOwner(Callable task, Object key) {
int partitionId = getPartitionId(key);
return submitToPartition(task, partitionId, null);
}
@Override
public DurableExecutorServiceFuture submitToKeyOwner(Runnable task, Object key) {
int partitionId = getPartitionId(key);
Callable callable = createRunnableAdapter(task);
return submitToPartition(callable, partitionId, null);
}
@Override
public DurableExecutorServiceFuture submit(Callable task) {
int partitionId = getTaskPartitionId(task);
return submitToPartition(task, partitionId, null);
}
@Override
public DurableExecutorServiceFuture submit(Runnable task, T result) {
int partitionId = getTaskPartitionId(task);
Callable callable = createRunnableAdapter(task);
return submitToPartition(callable, partitionId, result);
}
@Override
public DurableExecutorServiceFuture submit(Runnable task) {
int partitionId = getTaskPartitionId(task);
Callable callable = createRunnableAdapter(task);
return submitToPartition(callable, partitionId, null);
}
@Override
public List> invokeAll(Collection> tasks) throws InterruptedException {
throw new UnsupportedOperationException();
}
@Override
public List> invokeAll(Collection> tasks, long timeout, TimeUnit unit)
throws InterruptedException {
throw new UnsupportedOperationException();
}
@Override
public T invokeAny(Collection> tasks) throws InterruptedException, ExecutionException {
throw new UnsupportedOperationException();
}
@Override
public T invokeAny(Collection> tasks, long timeout, TimeUnit unit)
throws InterruptedException, ExecutionException, TimeoutException {
throw new UnsupportedOperationException();
}
@Override
public boolean awaitTermination(long timeout, TimeUnit unit) throws InterruptedException {
return false;
}
@Override
public void shutdown() {
ClientMessage request = DurableExecutorShutdownCodec.encodeRequest(name);
invoke(request);
}
@Override
public List shutdownNow() {
shutdown();
return Collections.emptyList();
}
@Override
public boolean isShutdown() {
ClientMessage request = DurableExecutorIsShutdownCodec.encodeRequest(name);
ClientMessage response = invoke(request);
DurableExecutorIsShutdownCodec.ResponseParameters resultParameters =
DurableExecutorIsShutdownCodec.decodeResponse(response);
return resultParameters.response;
}
@Override
public boolean isTerminated() {
return isShutdown();
}
private DurableExecutorServiceFuture submitToPartition(Callable task, int partitionId, T result) {
checkNotNull(task, "task should not be null");
ClientMessage request = DurableExecutorSubmitToPartitionCodec.encodeRequest(name, toData(task));
int sequence;
try {
ClientMessage response = invokeOnPartition(request, partitionId);
sequence = DurableExecutorSubmitToPartitionCodec.decodeResponse(response).response;
} catch (Throwable t) {
return new ClientDurableExecutorServiceCompletedFuture(t, getUserExecutor());
}
ClientMessage clientMessage = DurableExecutorRetrieveResultCodec.encodeRequest(name, sequence);
ClientInvocationFuture future = new ClientInvocation(getClient(), clientMessage, getName(), partitionId).invoke();
long taskId = Bits.combineToLong(partitionId, sequence);
return new ClientDurableExecutorServiceDelegatingFuture(future, getSerializationService(), RETRIEVE_RESPONSE_DECODER,
result, taskId);
}
private Executor getUserExecutor() {
return getContext().getExecutionService().getUserExecutor();
}
private RunnableAdapter createRunnableAdapter(Runnable command) {
if (command == null) {
throw new NullPointerException();
}
return new RunnableAdapter(command);
}
private int getTaskPartitionId(Object task) {
if (task instanceof PartitionAware) {
Object partitionKey = ((PartitionAware) task).getPartitionKey();
if (partitionKey != null) {
return getPartitionId(partitionKey);
}
}
return random.nextInt(partitionCount);
}
private int getPartitionId(Object key) {
return getContext().getPartitionService().getPartitionId(key);
}
private static class ClientDurableExecutorServiceDelegatingFuture extends ClientDelegatingFuture
implements DurableExecutorServiceFuture {
private final long taskId;
public ClientDurableExecutorServiceDelegatingFuture(ClientInvocationFuture clientInvocationFuture,
SerializationService serializationService,
ClientMessageDecoder clientMessageDecoder,
T defaultValue, long taskId) {
super(clientInvocationFuture, serializationService, clientMessageDecoder, defaultValue);
this.taskId = taskId;
}
@Override
public long getTaskId() {
return taskId;
}
}
private static final class ClientDurableExecutorServiceCompletedFuture implements DurableExecutorServiceFuture {
private final Object result;
private final Executor executor;
private ClientDurableExecutorServiceCompletedFuture(Object result, Executor executor) {
this.result = result;
this.executor = executor;
}
@Override
public long getTaskId() {
throw new IllegalStateException("Task failed to execute!");
}
@Override
public void andThen(ExecutionCallback callback) {
andThen(callback, executor);
}
@Override
public void andThen(final ExecutionCallback callback, Executor executor) {
executor.execute(new Runnable() {
@Override
public void run() {
if (result instanceof Throwable) {
callback.onFailure((Throwable) result);
} else {
callback.onResponse((T) result);
}
}
});
}
@Override
public boolean cancel(boolean mayInterruptIfRunning) {
return false;
}
@Override
public boolean isCancelled() {
return false;
}
@Override
public boolean isDone() {
return true;
}
@Override
public T get() throws InterruptedException, ExecutionException {
if (result instanceof Throwable) {
if (result instanceof ExecutionException) {
throw (ExecutionException) result;
}
if (result instanceof InterruptedException) {
throw (InterruptedException) result;
}
throw new ExecutionException((Throwable) result);
}
return (T) result;
}
@Override
public T get(long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException {
return get();
}
}
}