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// Copyright 2012,2013 Vaughn Vernon
//
// 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 io.dddspring.common.port.adapter.messaging.rabbitmq;
import io.dddspring.common.port.adapter.messaging.MessageException;
import java.io.IOException;
/**
* I am an exchange that simplifies RabbitMQ exchanges.
*
* @author Vaughn Vernon
*/
public class Exchange extends BrokerChannel {
/** My type, which is the type of exchange. */
private String type;
/**
* Answers a new instance of a direct Exchange with the name aName. The
* underlying exchange has the isDurable quality, and is not auto-deleted.
* @param aConnectionSettings the ConnectionSettings
* @param aName the String name of the exchange
* @param isDurable the boolean indicating whether or not I am durable
* @return Exchange
*/
public static Exchange directInstance(
ConnectionSettings aConnectionSettings,
String aName,
boolean isDurable) {
return new Exchange(aConnectionSettings, aName, "direct", isDurable);
}
/**
* Answers a new instance of a fan-out Exchange with the name aName. The
* underlying exchange has the isDurable quality, and is not auto-deleted.
* @param aConnectionSettings the ConnectionSettings
* @param aName the String name of the exchange
* @param isDurable the boolean indicating whether or not I am durable
* @return Exchange
*/
public static Exchange fanOutInstance(
ConnectionSettings aConnectionSettings,
String aName,
boolean isDurable) {
return new Exchange(aConnectionSettings, aName, "fanout", isDurable);
}
/**
* Answers a new instance of a headers Exchange with the name aName. The
* underlying exchange has the isDurable quality, and is not auto-deleted.
* @param aConnectionSettings the ConnectionSettings
* @param aName the String name of the exchange
* @param isDurable the boolean indicating whether or not I am durable
* @return Exchange
*/
public static Exchange headersInstance(
ConnectionSettings aConnectionSettings,
String aName,
boolean isDurable) {
return new Exchange(aConnectionSettings, aName, "headers", isDurable);
}
/**
* Answers a new instance of a topic Exchange with the name aName. The
* underlying exchange has the isDurable quality, and is not auto-deleted.
* @param aConnectionSettings the ConnectionSettings
* @param aName the String name of the exchange
* @param isDurable the boolean indicating whether or not I am durable
* @return Exchange
*/
public static Exchange topicInstance(
ConnectionSettings aConnectionSettings,
String aName,
boolean isDurable) {
return new Exchange(aConnectionSettings, aName, "topic", isDurable);
}
/**
* Constructs my default state.
* @param aConnectionSettings the ConnectionSettings
* @param aName the String name of the exchange
* @param aType the String type of the exchange
* @param isDurable the boolean indicating whether or not I am durable
*/
protected Exchange(
ConnectionSettings aConnectionSettings,
String aName,
String aType,
boolean isDurable) {
super(aConnectionSettings, aName);
this.setDurable(isDurable);
this.setType(aType);
try {
this.channel().exchangeDeclare(aName, aType, isDurable);
} catch (IOException e) {
throw new MessageException("Failed to create/open the exchange.", e);
}
}
/**
* @see BrokerChannel#isExchange()
*/
@Override
protected boolean isExchange() {
return true;
}
/**
* Answers my type.
* @return String
*/
protected String type() {
return this.type;
}
/**
* Sets my type.
* @param aType the String to set as my type
*/
private void setType(String aType) {
this.type = aType;
}
}
