com.rabbitmq.client.impl.recovery.TopologyRecoveryRetryLogic Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of amqp-client Show documentation
Show all versions of amqp-client Show documentation
The RabbitMQ Java client library allows Java applications to interface with RabbitMQ.
// Copyright (c) 2018-2020 VMware, Inc. or its affiliates. All rights reserved.
//
// This software, the RabbitMQ Java client library, is triple-licensed under the
// Mozilla Public License 1.1 ("MPL"), the GNU General Public License version 2
// ("GPL") and the Apache License version 2 ("ASL"). For the MPL, please see
// LICENSE-MPL-RabbitMQ. For the GPL, please see LICENSE-GPL2. For the ASL,
// please see LICENSE-APACHE2.
//
// This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND,
// either express or implied. See the LICENSE file for specific language governing
// rights and limitations of this software.
//
// If you have any questions regarding licensing, please contact us at
// [email protected].
package com.rabbitmq.client.impl.recovery;
import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.ShutdownSignalException;
import com.rabbitmq.utility.Utility;
import static com.rabbitmq.client.impl.recovery.TopologyRecoveryRetryHandlerBuilder.builder;
/**
* Useful ready-to-use conditions and operations for {@link DefaultRetryHandler}.
* They're composed and used with the {@link TopologyRecoveryRetryHandlerBuilder}.
*
* @see DefaultRetryHandler
* @see RetryHandler
* @see TopologyRecoveryRetryHandlerBuilder
* @since 4.8.0
*/
public abstract class TopologyRecoveryRetryLogic {
/**
* Channel has been closed because of a resource that doesn't exist.
*/
public static final DefaultRetryHandler.RetryCondition CHANNEL_CLOSED_NOT_FOUND = new DefaultRetryHandler.RetryCondition() {
@Override
public boolean test(RecordedEntity entity, Exception e) {
if (e.getCause() instanceof ShutdownSignalException) {
ShutdownSignalException cause = (ShutdownSignalException) e.getCause();
if (cause.getReason() instanceof AMQP.Channel.Close) {
return ((AMQP.Channel.Close) cause.getReason()).getReplyCode() == 404;
}
}
return false;
}
};
/**
* Recover a channel.
*/
public static final DefaultRetryHandler.RetryOperation RECOVER_CHANNEL = new DefaultRetryHandler.RetryOperation() {
@Override
public Void call(RetryContext context) throws Exception {
if (!context.entity().getChannel().isOpen()) {
context.connection().recoverChannel(context.entity().getChannel());
}
return null;
}
};
/**
* Recover the destination queue of a binding.
*/
public static final DefaultRetryHandler.RetryOperation RECOVER_BINDING_QUEUE = new DefaultRetryHandler.RetryOperation() {
@Override
public Void call(RetryContext context) {
if (context.entity() instanceof RecordedQueueBinding) {
RecordedBinding binding = context.binding();
AutorecoveringConnection connection = context.connection();
RecordedQueue recordedQueue = connection.getRecordedQueues().get(binding.getDestination());
if (recordedQueue != null) {
connection.recoverQueue(
recordedQueue.getName(), recordedQueue, false
);
}
}
return null;
}
};
/**
* Recover a binding.
*/
public static final DefaultRetryHandler.RetryOperation RECOVER_BINDING = new DefaultRetryHandler.RetryOperation() {
@Override
public Void call(RetryContext context) throws Exception {
context.binding().recover();
return null;
}
};
/**
* Recover the queue of a consumer.
*/
public static final DefaultRetryHandler.RetryOperation RECOVER_CONSUMER_QUEUE = new DefaultRetryHandler.RetryOperation() {
@Override
public Void call(RetryContext context) {
if (context.entity() instanceof RecordedConsumer) {
RecordedConsumer consumer = context.consumer();
AutorecoveringConnection connection = context.connection();
RecordedQueue recordedQueue = connection.getRecordedQueues().get(consumer.getQueue());
if (recordedQueue != null) {
connection.recoverQueue(
recordedQueue.getName(), recordedQueue, false
);
}
}
return null;
}
};
/**
* Recover a consumer.
*/
public static final DefaultRetryHandler.RetryOperation RECOVER_CONSUMER = new DefaultRetryHandler.RetryOperation() {
@Override
public String call(RetryContext context) throws Exception {
return context.consumer().recover();
}
};
/**
* Recover all the bindings of the queue of a consumer.
*/
public static final DefaultRetryHandler.RetryOperation RECOVER_CONSUMER_QUEUE_BINDINGS = new DefaultRetryHandler.RetryOperation() {
@Override
public Void call(RetryContext context) throws Exception {
if (context.entity() instanceof RecordedConsumer) {
String queue = context.consumer().getQueue();
for (RecordedBinding recordedBinding : Utility.copy(context.connection().getRecordedBindings())) {
if (recordedBinding instanceof RecordedQueueBinding && queue.equals(recordedBinding.getDestination())) {
recordedBinding.recover();
}
}
}
return null;
}
};
/**
* Pre-configured {@link TopologyRecoveryRetryHandlerBuilder} that retries recovery of bindings and consumers
* when their respective queue is not found.
* This retry handler can be useful for long recovery processes, whereby auto-delete queues
* can be deleted between queue recovery and binding/consumer recovery.
*/
public static final TopologyRecoveryRetryHandlerBuilder RETRY_ON_QUEUE_NOT_FOUND_RETRY_HANDLER = builder()
.bindingRecoveryRetryCondition(CHANNEL_CLOSED_NOT_FOUND)
.consumerRecoveryRetryCondition(CHANNEL_CLOSED_NOT_FOUND)
.bindingRecoveryRetryOperation(RECOVER_CHANNEL.andThen(RECOVER_BINDING_QUEUE).andThen(RECOVER_BINDING))
.consumerRecoveryRetryOperation(RECOVER_CHANNEL.andThen(RECOVER_CONSUMER_QUEUE.andThen(RECOVER_CONSUMER)
.andThen(RECOVER_CONSUMER_QUEUE_BINDINGS)));
}