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The RabbitMQ Java client library allows Java applications to interface with RabbitMQ.

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// Copyright (c) 2018 Pivotal Software, Inc.  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;

/**
 * Builder to ease creation of {@link DefaultRetryHandler} instances.
 * 

* Just override what you need. By default, retry conditions don't trigger retry, * retry operations are no-op, the number of retry attempts is 1, and the backoff * policy doesn't wait at all. * * @see DefaultRetryHandler * @see TopologyRecoveryRetryLogic * @since 4.8.0 */ public class TopologyRecoveryRetryHandlerBuilder { private DefaultRetryHandler.RetryCondition queueRecoveryRetryCondition = new DefaultRetryHandler.RetryCondition() { @Override public boolean test(RecordedQueue entity, Exception ex) { return false; } }; private DefaultRetryHandler.RetryCondition exchangeRecoveryRetryCondition = new DefaultRetryHandler.RetryCondition() { @Override public boolean test(RecordedExchange entity, Exception ex) { return false; } }; private DefaultRetryHandler.RetryCondition bindingRecoveryRetryCondition = new DefaultRetryHandler.RetryCondition() { @Override public boolean test(RecordedBinding entity, Exception ex) { return false; } }; private DefaultRetryHandler.RetryCondition consumerRecoveryRetryCondition = new DefaultRetryHandler.RetryCondition() { @Override public boolean test(RecordedConsumer entity, Exception ex) { return false; } }; private DefaultRetryHandler.RetryOperation queueRecoveryRetryOperation = new DefaultRetryHandler.RetryOperation() { @Override public Object call(RetryContext context) { return null; } }; private DefaultRetryHandler.RetryOperation exchangeRecoveryRetryOperation = new DefaultRetryHandler.RetryOperation() { @Override public Object call(RetryContext context) { return null; } }; private DefaultRetryHandler.RetryOperation bindingRecoveryRetryOperation = new DefaultRetryHandler.RetryOperation() { @Override public Object call(RetryContext context) { return null; } }; private DefaultRetryHandler.RetryOperation consumerRecoveryRetryOperation = new DefaultRetryHandler.RetryOperation() { @Override public Object call(RetryContext context) { return null; } }; private int retryAttempts = 2; private BackoffPolicy backoffPolicy = new BackoffPolicy() { @Override public void backoff(int attemptNumber) { } }; public static TopologyRecoveryRetryHandlerBuilder builder() { return new TopologyRecoveryRetryHandlerBuilder(); } public TopologyRecoveryRetryHandlerBuilder queueRecoveryRetryCondition( DefaultRetryHandler.RetryCondition queueRecoveryRetryCondition) { this.queueRecoveryRetryCondition = queueRecoveryRetryCondition; return this; } public TopologyRecoveryRetryHandlerBuilder exchangeRecoveryRetryCondition( DefaultRetryHandler.RetryCondition exchangeRecoveryRetryCondition) { this.exchangeRecoveryRetryCondition = exchangeRecoveryRetryCondition; return this; } public TopologyRecoveryRetryHandlerBuilder bindingRecoveryRetryCondition( DefaultRetryHandler.RetryCondition bindingRecoveryRetryCondition) { this.bindingRecoveryRetryCondition = bindingRecoveryRetryCondition; return this; } public TopologyRecoveryRetryHandlerBuilder consumerRecoveryRetryCondition( DefaultRetryHandler.RetryCondition consumerRecoveryRetryCondition) { this.consumerRecoveryRetryCondition = consumerRecoveryRetryCondition; return this; } public TopologyRecoveryRetryHandlerBuilder queueRecoveryRetryOperation(DefaultRetryHandler.RetryOperation queueRecoveryRetryOperation) { this.queueRecoveryRetryOperation = queueRecoveryRetryOperation; return this; } public TopologyRecoveryRetryHandlerBuilder exchangeRecoveryRetryOperation(DefaultRetryHandler.RetryOperation exchangeRecoveryRetryOperation) { this.exchangeRecoveryRetryOperation = exchangeRecoveryRetryOperation; return this; } public TopologyRecoveryRetryHandlerBuilder bindingRecoveryRetryOperation(DefaultRetryHandler.RetryOperation bindingRecoveryRetryOperation) { this.bindingRecoveryRetryOperation = bindingRecoveryRetryOperation; return this; } public TopologyRecoveryRetryHandlerBuilder consumerRecoveryRetryOperation(DefaultRetryHandler.RetryOperation consumerRecoveryRetryOperation) { this.consumerRecoveryRetryOperation = consumerRecoveryRetryOperation; return this; } public TopologyRecoveryRetryHandlerBuilder backoffPolicy(BackoffPolicy backoffPolicy) { this.backoffPolicy = backoffPolicy; return this; } public TopologyRecoveryRetryHandlerBuilder retryAttempts(int retryAttempts) { this.retryAttempts = retryAttempts; return this; } public RetryHandler build() { return new DefaultRetryHandler( queueRecoveryRetryCondition, exchangeRecoveryRetryCondition, bindingRecoveryRetryCondition, consumerRecoveryRetryCondition, queueRecoveryRetryOperation, exchangeRecoveryRetryOperation, bindingRecoveryRetryOperation, consumerRecoveryRetryOperation, retryAttempts, backoffPolicy); } }