trunk/jbi-api-1.0/src/main/java/javax/jbi/messaging/MessageExchangeFactory.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 "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 javax.jbi.messaging;

import java.net.URI;

import javax.xml.namespace.QName;

/**
 * A message exchange factory is used used to create new instances of
 * MessageExchange. Service consumers use these factories to create
 * message exchanges when initiating a new service request. Message
 * exchange factories are created using the
 * {@link javax.jbi.component.ComponentContext} given to the component
 * during its initialization (see
 * {@link javax.jbi.component.ComponentLifeCycle}). There are a variety
 * of ways to creating such factories, each of which creates a context
 * that is used to provide some of the default properties of
 * MessageExchange instances created by the factory instances. For example,
 * a factory can be created for a particular endpoint, ensuring that all exchanges
 * created by the factory have that endpoint set as the default endpoint property
 * of the exchange. This allows components to retain factories as a way of aligning
 * internal processing context with the context contained in the factory, ensuring
 * that the exchanges created consistently reflect that context.
 */
public interface MessageExchangeFactory {

    /**
     * Creates a new MessageExchange instance used to initiate a service
     * invocation. JBI defines a set of four basic message exchange types,
     * corresponding to the predefined in-* WSDL 2.0 Message Exchange Patterns.
     *
     * @param serviceName name of the service to be invoked
     * @param operationName name of the operation to be invoked
     * @return new message exchange, initialized for invoking the given service and operation
     * @throws MessagingException if the given service or operation are not registered
     *                            with the NMR or the factory was created for a particular
     *                            interface, and the given serviceName does not implement
     *                            that interface.
     */
    MessageExchange createExchange(QName serviceName, QName operationName) throws MessagingException;

    /**
     * Creates a new MessageExchange instance used to initiate a service invocation.
     * JBI defines a set of eight fundamental message exchange types which are created
     * using binding and engine delivery channels. This base method is provided for
     * extensibility, to satisfy the need for vendor-specific message exchange patterns.
     * The registration and administration of these patterns is not addressed by JBI.
     *
     * @param pattern message exchange pattern
     * @return new message exchange
     * @throws MessagingException specified pattern is not registered to a message exchange type
     */
    MessageExchange createExchange(URI pattern) throws MessagingException;

    /**
     * Convenience method that creates an In-Only message exchange.
     * 
     * @return new In-Only message exchange
     * @throws MessagingException failed to create exchange
     */
    InOnly createInOnlyExchange() throws MessagingException;

    /**
     * Convenience method that creates an In-Optional-Out message exchange.
     *
     * @return new In-Optional-Out message exchange
     * @throws MessagingException failed to create exchange
     */
    InOptionalOut createInOptionalOutExchange() throws MessagingException;

    /**
     * Convenience method that creates an In-Out message exchange.
     *
     * @return new In-Out message exchange
     * @throws MessagingException failed to create exchange
     */
    InOut createInOutExchange() throws MessagingException;

    /**
     * Convenience method that creates an Robust-In-Only message exchange.
     *
     * @return new Robust-In-Only message exchange
     * @throws MessagingException failed to create exchange
     */
    RobustInOnly createRobustInOnlyExchange() throws MessagingException;

}