modules/samples/userguide/src/userguide/clients/EchoNonBlockingDualClient.java

/*
 * Copyright 2004,2005 The Apache Software Foundation.
 *
 * 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 userguide.clients;

import org.apache.axiom.om.OMElement;
import org.apache.axis2.AxisFault;
import org.apache.axis2.Constants;
import org.apache.axis2.addressing.EndpointReference;
import org.apache.axis2.client.Options;
import org.apache.axis2.client.ServiceClient;
import org.apache.axis2.client.async.AsyncResult;
import org.apache.axis2.client.async.Callback;

import javax.xml.namespace.QName;

/**
 * Sample for asynchronous dual channel non-blocking service invocation.
 * Message Exchage Pattern IN-OUT
 * Ulitmate asynchronous service invocation sample.
 */
public class EchoNonBlockingDualClient {
    private static EndpointReference targetEPR = new EndpointReference("http://127.0.0.1:8080/axis2/services/MyService");

    public static void main(String[] args) {
        ServiceClient sender = null;
        try {
            OMElement payload = ClientUtil.getEchoOMElement();

            Options options = new Options();
            options.setTo(targetEPR);
            options.setTransportInProtocol(Constants.TRANSPORT_HTTP);
            options.setUseSeparateListener(true);
            options.setAction("urn:echo");  // this is the action mapping we put within the service.xml

            //Callback to handle the response
            Callback callback = new Callback() {
                public void onComplete(AsyncResult result) {
                    System.out.println(result.getResponseEnvelope());
                }

                public void onError(Exception e) {
                    e.printStackTrace();
                }
            };

            //Non-Blocking Invocation
            sender = new ServiceClient();
            sender.engageModule(new QName(Constants.MODULE_ADDRESSING));
            sender.setOptions(options);
            sender.sendReceiveNonBlocking(payload, callback);

            //Wait till the callback receives the response.
            while (!callback.isComplete()) {
                Thread.sleep(1000);
            }
            //Need to close the Client Side Listener.

        } catch (AxisFault axisFault) {
            axisFault.printStackTrace();
        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
            try {
                sender.cleanup();
            } catch (AxisFault axisFault) {
                //have to ignore this
            }
        }

    }
}