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The core JMS Client implementation
/*
* 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.qpid.jms.provider.amqp;
import java.io.IOException;
import java.util.Map;
import javax.jms.JMSException;
import org.apache.qpid.jms.JmsDestination;
import org.apache.qpid.jms.message.JmsOutboundMessageDispatch;
import org.apache.qpid.jms.meta.JmsProducerId;
import org.apache.qpid.jms.meta.JmsProducerInfo;
import org.apache.qpid.jms.provider.AsyncResult;
import org.apache.qpid.jms.provider.WrappedAsyncResult;
import org.apache.qpid.jms.provider.amqp.builders.AmqpProducerBuilder;
import org.apache.qpid.jms.util.IdGenerator;
import org.apache.qpid.jms.util.LRUCache;
import org.apache.qpid.proton.engine.EndpointState;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Handles the case of anonymous JMS MessageProducers.
*
* In order to simulate the anonymous producer we must create a sender for each message
* send attempt and close it following a successful send.
*/
public class AmqpAnonymousFallbackProducer extends AmqpProducer {
private static final Logger LOG = LoggerFactory.getLogger(AmqpAnonymousFallbackProducer.class);
private static final IdGenerator producerIdGenerator = new IdGenerator();
private final AnonymousProducerCache producerCache;
private final String producerIdKey = producerIdGenerator.generateId();
private long producerIdCount;
/**
* Creates the Anonymous Producer object.
*
* @param session
* the session that owns this producer
* @param info
* the JmsProducerInfo for this producer.
*/
public AmqpAnonymousFallbackProducer(AmqpSession session, JmsProducerInfo info) {
super(session, info);
if (connection.isAnonymousProducerCache()) {
producerCache = new AnonymousProducerCache(10);
producerCache.setMaxCacheSize(connection.getAnonymousProducerCacheSize());
} else {
producerCache = null;
}
}
@Override
public void send(JmsOutboundMessageDispatch envelope, AsyncResult request) throws IOException, JMSException {
LOG.trace("Started send chain for anonymous producer: {}", getProducerId());
// Force sends marked as asynchronous to be sent synchronous so that the temporary
// producer instance can handle failures and perform necessary completion work on
// the send.
envelope.setSendAsync(false);
AmqpProducer producer = null;
if (connection.isAnonymousProducerCache()) {
producer = producerCache.get(envelope.getDestination());
}
if (producer == null) {
// Create a new ProducerInfo for the short lived producer that's created to perform the
// send to the given AMQP target.
JmsProducerInfo info = new JmsProducerInfo(getNextProducerId());
info.setDestination(envelope.getDestination());
info.setPresettle(this.getResourceInfo().isPresettle());
// We open a Fixed Producer instance with the target destination. Once it opens
// it will trigger the open event which will in turn trigger the send event.
// If caching is disabled the created producer will be closed immediately after
// the entire send chain has finished and the delivery has been acknowledged.
AmqpProducerBuilder builder = new AmqpProducerBuilder(session, info);
builder.buildResource(new AnonymousSendRequest(request, builder, envelope));
if (connection.isAnonymousProducerCache()) {
// Cache it in hopes of not needing to create large numbers of producers.
producerCache.put(envelope.getDestination(), builder.getResource());
}
getParent().getProvider().pumpToProtonTransport(request);
} else {
producer.send(envelope, request);
}
}
@Override
public void close(AsyncResult request) {
// Trigger an immediate close, the internal producers that are currently in the cache
// if the cache is enabled.
if (connection.isAnonymousProducerCache()) {
for (AmqpProducer producer : producerCache.values()) {
producer.close(new CloseRequest(producer));
}
}
request.onSuccess();
}
@Override
public boolean isAnonymous() {
return true;
}
@Override
public EndpointState getLocalState() {
return EndpointState.ACTIVE;
}
@Override
public EndpointState getRemoteState() {
return EndpointState.ACTIVE;
}
private JmsProducerId getNextProducerId() {
return new JmsProducerId(producerIdKey, -1, producerIdCount++);
}
//----- AsyncResult objects used to complete the sends -------------------//
private abstract class AnonymousRequest extends WrappedAsyncResult {
protected final JmsOutboundMessageDispatch envelope;
public AnonymousRequest(AsyncResult sendResult, JmsOutboundMessageDispatch envelope) {
super(sendResult);
this.envelope = envelope;
}
/**
* In all cases of the chain of events that make up the send for an anonymous
* producer a failure will trigger the original send request to fail.
*/
@Override
public void onFailure(Throwable result) {
LOG.debug("Send failed during {} step in chain: {}", this.getClass().getName(), getProducerId());
super.onFailure(result);
}
public abstract AmqpProducer getProducer();
}
private final class AnonymousSendRequest extends AnonymousRequest {
private final AmqpProducerBuilder producerBuilder;
public AnonymousSendRequest(AsyncResult sendResult, AmqpProducerBuilder producerBuilder, JmsOutboundMessageDispatch envelope) {
super(sendResult, envelope);
this.producerBuilder = producerBuilder;
}
@Override
public void onSuccess() {
LOG.trace("Open phase of anonymous send complete: {} ", getProducerId());
AnonymousSendCompleteRequest send = new AnonymousSendCompleteRequest(this);
try {
getProducer().send(envelope, send);
} catch (Exception e) {
super.onFailure(e);
}
}
@Override
public AmqpProducer getProducer() {
return producerBuilder.getResource();
}
}
private final class AnonymousSendCompleteRequest extends AnonymousRequest {
private final AmqpProducer producer;
public AnonymousSendCompleteRequest(AnonymousSendRequest open) {
super(open.getWrappedRequest(), open.envelope);
this.producer = open.getProducer();
}
@Override
public void onFailure(Throwable result) {
LOG.trace("Send phase of anonymous send failed: {} ", getProducerId());
if (!connection.isAnonymousProducerCache()) {
AnonymousCloseRequest close = new AnonymousCloseRequest(this);
producer.close(close);
}
super.onFailure(result);
}
@Override
public void onSuccess() {
LOG.trace("Send phase of anonymous send complete: {} ", getProducerId());
if (!connection.isAnonymousProducerCache()) {
AnonymousCloseRequest close = new AnonymousCloseRequest(this);
producer.close(close);
} else {
super.onSuccess();
}
}
@Override
public AmqpProducer getProducer() {
return producer;
}
}
private final class AnonymousCloseRequest extends AnonymousRequest {
private final AmqpProducer producer;
public AnonymousCloseRequest(AnonymousSendCompleteRequest sendComplete) {
super(sendComplete.getWrappedRequest(), sendComplete.envelope);
this.producer = sendComplete.getProducer();
}
@Override
public void onSuccess() {
LOG.trace("Close phase of anonymous send complete: {} ", getProducerId());
super.onSuccess();
}
@Override
public AmqpProducer getProducer() {
return producer;
}
}
private final class CloseRequest implements AsyncResult {
private final AmqpProducer producer;
public CloseRequest(AmqpProducer producer) {
this.producer = producer;
}
@Override
public void onFailure(Throwable result) {
AmqpAnonymousFallbackProducer.this.connection.getProvider().fireProviderException(result);
}
@Override
public void onSuccess() {
LOG.trace("Close of anonymous producer {} complete", producer);
}
@Override
public boolean isComplete() {
return producer.isClosed();
}
}
private final class AnonymousProducerCache extends LRUCache {
private static final long serialVersionUID = 1L;
public AnonymousProducerCache(int cacheSize) {
super(cacheSize);
}
@Override
protected void onCacheEviction(Map.Entry cached) {
LOG.trace("Producer: {} evicted from producer cache", cached.getValue());
cached.getValue().close(new CloseRequest(cached.getValue()));
}
}
}
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