| /**************************************************************************** |
| * Copyright (c) 2009 Composent, Inc. and others. |
| * |
| * This program and the accompanying materials are made |
| * available under the terms of the Eclipse Public License 2.0 |
| * which is available at https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * Contributors: |
| * Composent, Inc. - initial API and implementation |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| *****************************************************************************/ |
| package org.eclipse.ecf.examples.internal.remoteservices.hello.ds.consumer; |
| |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.Future; |
| |
| import org.eclipse.core.runtime.Assert; |
| import org.eclipse.core.runtime.OperationCanceledException; |
| import org.eclipse.ecf.examples.remoteservices.hello.IHello; |
| import org.eclipse.ecf.examples.remoteservices.hello.IHelloAsync; |
| import org.eclipse.ecf.remoteservice.IAsyncCallback; |
| import org.eclipse.ecf.remoteservice.IRemoteService; |
| import org.eclipse.ecf.remoteservice.IRemoteServiceProxy; |
| import org.eclipse.ecf.remoteservice.RemoteServiceHelper; |
| import org.eclipse.equinox.concurrent.future.IFuture; |
| |
| public class HelloClientComponent { |
| |
| private static final String CONSUMER_NAME = "helloclientcomponent"; |
| |
| public void bindHello(IHello proxy) { |
| // First print out on console that we got a proxy instance |
| System.out.println("Got proxy IHello="+proxy); |
| |
| // Call proxy synchronously. Note that this call may block or fail due to |
| // synchronous communication with remote service |
| System.out.println("STARTING remote call via proxy..."); |
| proxy.hello(CONSUMER_NAME+" via proxy"); |
| System.out.println("COMPLETED remote call via proxy"); |
| System.out.println(); |
| |
| // If the proxy is also an instance of IHelloAsync then use |
| // this asynchronous interface to invoke methods asynchronously |
| if (proxy instanceof IHelloAsync) { |
| IHelloAsync helloA = (IHelloAsync) proxy; |
| // Create callback for use in IHelloAsync |
| IAsyncCallback callback = new IAsyncCallback<String>() { |
| public void onSuccess(String result) { |
| System.out.println("COMPLETED remote call with callback SUCCESS with result="+result); |
| System.out.println(); |
| } |
| public void onFailure(Throwable t) { |
| System.out.println("COMPLETED remote call with callback FAILED with exception="+t); |
| System.out.println(); |
| } |
| }; |
| |
| // Call asynchronously with callback |
| System.out.println("STARTING async remote call via callback..."); |
| helloA.helloAsync(CONSUMER_NAME + " via async proxy with listener", callback); |
| System.out.println("LOCAL async invocation complete"); |
| System.out.println(); |
| |
| // Call asynchronously with future |
| System.out.println("STARTING async remote call via future..."); |
| Future<String> future = helloA.helloAsync(CONSUMER_NAME + " via async proxy with future"); |
| System.out.println("LOCAL async future invocation complete"); |
| System.out.println(); |
| try { |
| while (!future.isDone()) { |
| // do some other stuff |
| System.out.println("LOCAL future not yet done...so we're doing other stuff while waiting for future to be done"); |
| Thread.sleep(200); |
| } |
| // Now it's done, so this will not block |
| String result = future.get(); |
| System.out.println("COMPLETED remote call with future SUCCEEDED with result="+result); |
| System.out.println(); |
| } catch (OperationCanceledException e) { |
| System.out.println("COMPLETED remote call with callback CANCELLED with exception="+e); |
| System.out.println(); |
| e.printStackTrace(); |
| } catch (InterruptedException e) { |
| System.out.println("COMPLETED remote call with callback INTERRUPTED with exception="+e); |
| System.out.println(); |
| e.printStackTrace(); |
| } catch (ExecutionException e) { |
| System.out.println("COMPLETED remote call with callback INTERRUPTED with exception="+e); |
| System.out.println(); |
| e.printStackTrace(); |
| } |
| } |
| |
| // It's also possible to get the remote service directly from the proxy |
| IRemoteService remoteService = ((IRemoteServiceProxy) proxy).getRemoteService(); |
| Assert.isNotNull(remoteService); |
| |
| // In this case, we will make an non-blocking call and immediately get a 'future'...which is |
| // a placeholder for a result of the remote computation. This will not block. |
| System.out.println("STARTING async remote call via future..."); |
| IFuture future = RemoteServiceHelper.futureExec(remoteService, "hello", |
| new Object[] { CONSUMER_NAME + " future" }); |
| System.out.println("LOCAL async future invocation complete"); |
| System.out.println(); |
| // Client can execute arbitrary code here... |
| try { |
| // This blocks until communication and computation have completed successfully |
| while (!future.isDone()) { |
| // do some other stuff |
| System.out.println("LOCAL future not yet done...so we're doing other stuff while waiting for future to be done"); |
| Thread.sleep(200); |
| } |
| // Now it's done, so this will not block |
| Object result = future.get(); |
| System.out.println("COMPLETED remote call with future SUCCEEDED with result="+result); |
| System.out.println(); |
| } catch (Exception e) { |
| e.printStackTrace(); |
| } |
| |
| |
| } |
| |
| } |