qpid/java/common/src/main/java/org/apache/qpid/exchange/ExchangeDefaults.java

/*
 *
 * 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
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 * KIND, either express or implied.  See the License for the
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 */
package org.apache.qpid.exchange;

import org.apache.qpid.framing.AMQShortString;

/**
 * Defines the names of the standard AMQP exchanges that every AMQP broker should provide. These exchange names
 * and type are given in the specification.
 *
 * <p/><table id="crc"><caption>CRC Card</caption>
 * <tr><th> Responsibilities <th> Collaborations
 * <tr><td> Defines the standard AMQP exchange names.
 * <tr><td> Defines the standard AMQP exchange types.
 * </table>
 *
 * @todo A type safe enum, might be more appropriate for the exchange types.
 */
public class ExchangeDefaults
{
    private ExchangeDefaults()
    {
    }

    /** The default direct exchange, which is a special internal exchange that cannot be explicitly bound to. */
    public static final AMQShortString DEFAULT_EXCHANGE_NAME = new AMQShortString("<<default>>");

    /** The pre-defined topic exchange, the broker SHOULD provide this. */
    public static final AMQShortString TOPIC_EXCHANGE_NAME = new AMQShortString("amq.topic");

    /** Defines the identifying type name of topic exchanges. */
    public static final AMQShortString TOPIC_EXCHANGE_CLASS = new AMQShortString("topic");

    /** The pre-defined direct exchange, the broker MUST provide this. */
    public static final AMQShortString DIRECT_EXCHANGE_NAME = new AMQShortString("amq.direct");

    /** Defines the identifying type name of direct exchanges. */
    public static final AMQShortString DIRECT_EXCHANGE_CLASS = new AMQShortString("direct");

    /** The pre-defined headers exchange, the specification does not say this needs to be provided. */
    public static final AMQShortString HEADERS_EXCHANGE_NAME = new AMQShortString("amq.match");

    /** Defines the identifying type name of headers exchanges. */
    public static final AMQShortString HEADERS_EXCHANGE_CLASS = new AMQShortString("headers");

    /** The pre-defined fanout exchange, the boker MUST provide this. */
    public static final AMQShortString FANOUT_EXCHANGE_NAME = new AMQShortString("amq.fanout");

    /** Defines the identifying type name of fanout exchanges. */
    public static final AMQShortString FANOUT_EXCHANGE_CLASS = new AMQShortString("fanout");
    
    public static final AMQShortString WILDCARD_ANY = new AMQShortString("*");
}