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package javax.xml.ws;

import java.util.concurrent.Future;

/** The <code>Dispatch</code> interface provides support

 *  for the dynamic invocation of a service endpoint operations. The

 *  <code>javax.xml.ws.Service</code>

 *  class acts as a factory for the creation of <code>Dispatch</code>

 *  instances.

 *

 *  @since JAX-WS 2.0

**/

public interface Dispatch<T> extends BindingProvider {

    /** Invoke a service operation synchronously.

     *

     * The client is responsible for ensuring that the <code>msg</code> object

     * when marshalled is formed according to the requirements of the protocol

     * binding in use.

     *

     * @param msg An object that will form the message or payload of

     *     the message used to invoke the operation.

     * @return The response message or message payload to the

     *     operation invocation.

     * @throws WebServiceException If a fault occurs during communication with

     *     the service

     * @throws WebServiceException If there is any error in the configuration of

     *     the <code>Dispatch</code> instance

    **/

    public T invoke(T msg);

    /** Invoke a service operation asynchronously.  The

     *  method returns without waiting for the response to the operation

     *  invocation, the results of the operation are obtained by polling the

     *  returned <code>Response</code>.

     * <p>

     * The client is responsible for ensuring that the <code>msg</code> object

     * when marshalled is formed according to the requirements of the protocol

     * binding in use.

     *

     * @param msg An object that will form the message or payload of

     *     the message used to invoke the operation.

     * @return The response message or message payload to the

     *     operation invocation.

     * @throws WebServiceException If there is any error in the configuration of

     *     the <code>Dispatch</code> instance

    **/

    public Response<T> invokeAsync(T msg);

    /** Invoke a service operation asynchronously. The

     *  method returns without waiting for the response to the operation

     *  invocation, the results of the operation are communicated to the client

     *  via the passed in <code>handler</code>.

     * <p>

     * The client is responsible for ensuring that the <code>msg</code> object

     * when marshalled is formed according to the requirements of the protocol

     * binding in use.

     *

     * @param msg An object that will form the message or payload of

     *     the message used to invoke the operation.

     * @param handler The handler object that will receive the

     *     response to the operation invocation.

     * @return A <code>Future</code> object that may be used to check the status

     *     of the operation invocation. This object MUST NOT be used to try to

     *     obtain the results of the operation - the object returned from

     *     <code>Future&lt;?>.get()</code> is implementation dependent

     *     and any use of it will result in non-portable behaviour.

     * @throws WebServiceException If there is any error in the configuration of

     *     the <code>Dispatch</code> instance

    **/

    public Future<?> invokeAsync(T msg, AsyncHandler<T> handler);

    /** Invokes a service operation using the one-way

     *  interaction mode. The operation invocation is logically non-blocking,

     *  subject to the capabilities of the underlying protocol, no results

     *  are returned. When

     *  the protocol in use is SOAP/HTTP, this method MUST block until

     *  an HTTP response code has been received or an error occurs.

     * <p>

     * The client is responsible for ensuring that the <code>msg</code> object

     * when marshalled is formed according to the requirements of the protocol

     * binding in use.

     *

     * @param msg An object that will form the message or payload of

     *     the message used to invoke the operation.

     * @throws WebServiceException If there is any error in the configuration of

     *     the <code>Dispatch</code> instance or if an error occurs during the

     *     invocation.

    **/

    public void invokeOneWay(T msg);

}