CppServiceClient.java
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00001 /*
00002  * Software License Agreement (BSD License)
00003  *
00004  *  Copyright (c) 2008, Willow Garage, Inc.
00005  *  All rights reserved.
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00007  *  Redistribution and use in source and binary forms, with or without
00008  *  modification, are permitted provided that the following conditions
00009  *  are met:
00010  *
00011  *   * Redistributions of source code must retain the above copyright
00012  *     notice, this list of conditions and the following disclaimer.
00013  *   * Redistributions in binary form must reproduce the above
00014  *     copyright notice, this list of conditions and the following
00015  *     disclaimer in the documentation and/or other materials provided
00016  *     with the distribution.
00017  *   * Neither the name of Willow Garage, Inc. nor the names of its
00018  *     contributors may be used to endorse or promote products derived
00019  *     from this software without specific prior written permission.
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00021  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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00034 
00035 // author: Jason Wolfe
00036 
00037 
00038 package ros.roscpp;
00039 
00040 import java.util.Map;
00041 import java.util.concurrent.Callable;
00042 import java.util.concurrent.ExecutionException;
00043 import java.util.concurrent.ExecutorService;
00044 import java.util.concurrent.Executors;
00045 import java.util.concurrent.FutureTask;
00046 
00047 import ros.RosException;
00048 import ros.ServiceClient;
00049 import ros.communication.Message;
00050 import ros.communication.Service;
00051 
00052 public class CppServiceClient<Q extends Message, A extends Message, S extends Service<Q, A> >  implements ServiceClient<Q, A, S> {
00053         private CppNodeHandle handle;
00054         private String name;
00055         private S serviceTemplate;
00056         private long cppServiceClient;
00057         private ExecutorService threadPool;
00058         
00059         private CppServiceClient() { }
00060         
00061         protected static <Q extends Message, A extends Message, S extends Service<Q, A> > CppServiceClient<Q,A,S> 
00062     create(CppNodeHandle handle, long cppHandle, String name, S serviceTemplate, boolean isPersistant, Map<String, String> headerValues) {
00063                 CppServiceClient<Q, A, S> that = new CppServiceClient<Q, A, S>();
00064                 that.handle = handle;
00065                 that.name = name;
00066                 that.serviceTemplate  = serviceTemplate;
00067                 that.cppServiceClient = JNI.serviceClient(cppHandle, name, serviceTemplate.getMD5Sum(), isPersistant, Util.mapToArray(headerValues));
00068                 if (that.cppServiceClient == 0) throw new RuntimeException("Could not create service client " + name + "(should not happen)"); 
00069                 return that;
00070         }
00071 
00072         public String getService() {return name; }
00073         
00074         public A call(Q request) throws RosException {
00075                 A response = serviceTemplate.createResponse();
00076                 if (!JNI.callService(cppServiceClient, request, response, serviceTemplate.getMD5Sum())) throw new RosException("Service call failed!");
00077                 return response;
00078         }
00079 
00080         public FutureTask<A> callAsync(final Q request) throws RosException {
00081                 if (threadPool == null) threadPool = Executors.newCachedThreadPool();
00082                 final CppServiceClient<Q, A, S> that = this;
00083                 FutureTask<A> f = new FutureTask<A>(new Callable<A>() {
00084                         public A call() throws Exception {
00085                                 return (A) that.call(request);
00086                         }
00087                 });
00088                 handle.submitFuture(f);
00089                 return f;
00090         }
00091 
00092         public A callLocal(Q request) throws RosException {
00093                 FutureTask<A> f = callAsync(request);
00094                 while(!f.isDone()) {
00095                         handle.spinOnce();
00096                 }
00097                 try {
00098                         return f.get();
00099                 } catch (InterruptedException e) {
00100                         throw new RosException("InterruptedException in callLocal", e);
00101                 } catch (ExecutionException e) {
00102                         throw new RosException("ExecutionException in callLocal", e);
00103                 }
00104         }
00105 
00106         public boolean isValid() { return (cppServiceClient != 0); }
00107 
00108         public void shutdown() {
00109                 if (!isValid()) return;
00110                 JNI.shutdownServiceClient(cppServiceClient);
00111                 cppServiceClient = 0;
00112         }
00113 }
00114 


rosjava_jni
Author(s): Maintained by Gheorghe Lisca (lisca@cs.uni-bremen.de) and developed by Jason Wolfe (jawolfe@willowgarage.com), Nicholas Butko (nbutko@cogsci.ucsd.edu), Lorenz Moesenlechner (moesenle@in.tum.de)
autogenerated on Sun Oct 5 2014 22:54:14