/*
* 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.core.HazelcastException;
import com.hazelcast.logging.ILogger;
import com.hazelcast.nio.Connection;
import com.hazelcast.nio.Packet;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.spi.*;
import com.hazelcast.spi.exception.ResponseAlreadySentException;
import java.util.concurrent.atomic.AtomicBoolean;
/**
* @author mdogan 8/2/12
*/
public final class ResponseHandlerFactory {
private static final NoResponseHandler NO_RESPONSE_HANDLER = new NoResponseHandler();
public static void setLocalResponseHandler(Operation op, Callback<Object> callback) {
op.setResponseHandler(createLocalResponseHandler(op, callback));
}
public static ResponseHandler createLocalResponseHandler(Operation op, Callback<Object> callback) {
return new LocalInvocationResponseHandler(callback, op.getCallId());
}
public static void setRemoteResponseHandler(NodeEngine nodeEngine, Operation op) {
op.setResponseHandler(createRemoteResponseHandler(nodeEngine, op));
}
public static ResponseHandler createRemoteResponseHandler(NodeEngine nodeEngine, Operation op) {
if (op.getCallId() == 0) {
if (op.returnsResponse()) {
throw new HazelcastException("Op: " + op.getClass().getName() + " can not return response without call-id!");
}
return NO_RESPONSE_HANDLER;
}
return new RemoteInvocationResponseHandler(nodeEngine, op);
}
public static ResponseHandler createEmptyResponseHandler() {
return NO_RESPONSE_HANDLER;
}
private static class NoResponseHandler implements ResponseHandler {
public void sendResponse(final Object obj) {
}
public boolean isLocal() {
return false;
}
}
public static ResponseHandler createErrorLoggingResponseHandler(ILogger logger) {
return new ErrorLoggingResponseHandler(logger);
}
private static class ErrorLoggingResponseHandler implements ResponseHandler {
private final ILogger logger;
private ErrorLoggingResponseHandler(ILogger logger) {
this.logger = logger;
}
public void sendResponse(final Object obj) {
if (obj instanceof Throwable) {
Throwable t = (Throwable) obj;
logger.severe(t);
}
}
public boolean isLocal() {
return true;
}
}
private static class RemoteInvocationResponseHandler implements ResponseHandler {
private final NodeEngine nodeEngine;
private final Operation op;
private final AtomicBoolean sent = new AtomicBoolean(false);
private RemoteInvocationResponseHandler(NodeEngine nodeEngine, Operation op) {
this.nodeEngine = nodeEngine;
this.op = op;
}
public void sendResponse(Object obj) {
long callId = op.getCallId();
Connection conn = op.getConnection();
if (!sent.compareAndSet(false, true)) {
throw new ResponseAlreadySentException("NormalResponse already sent for call: " + callId
+ " to " + conn.getEndPoint() + ", current-response: " + obj);
}
NormalResponse response;
if(!(obj instanceof NormalResponse)){
response = new NormalResponse(obj, op.getCallId(),0, op.isUrgent());
}else{
response = (NormalResponse)obj;
}
nodeEngine.getOperationService().send(response, op.getCallerAddress());
}
public boolean isLocal() {
return false;
}
}
private static class LocalInvocationResponseHandler implements ResponseHandler {
private final Callback<Object> callback;
private final long callId;
private final AtomicBoolean sent = new AtomicBoolean(false);
private LocalInvocationResponseHandler(Callback<Object> callback, long callId) {
this.callback = callback;
this.callId = callId;
}
public void sendResponse(Object obj) {
if (!sent.compareAndSet(false, true)) {
throw new ResponseAlreadySentException("NormalResponse already sent for callback: " + callback
+ ", current-response: : " + obj);
}
callback.notify(obj);
}
public boolean isLocal() {
return true;
}
}
private ResponseHandlerFactory() {
}
}