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jeremybenn |
/* RequestTest.java --
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Copyright (C) 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.classpath.examples.CORBA.SimpleCommunication.communication;
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import java.io.File;
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import java.io.FileReader;
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import java.io.IOException;
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import org.omg.CORBA.BAD_OPERATION;
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import org.omg.CORBA.ExceptionList;
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import org.omg.CORBA.NVList;
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import org.omg.CORBA.ORB;
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import org.omg.CORBA.Request;
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import org.omg.CORBA.TCKind;
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import org.omg.CORBA.UnknownUserException;
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/**
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* This code uses CORBA to call various methods of the remote object,
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* passing data structures in both directions. It finds the server by
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* reading the IOR.txt file that must be present in the folder,
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* where the program has been started.
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*
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* The IOR.txt file is written by the server
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* {@link gnu.classpath.examples.CORBA.SimpleCommunication.DemoServer}.
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* The server should be reachable over Internet, unless blocked by
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* security tools.
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*
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* This code is tested for interoperability with Sun Microsystems
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* java implementation 1.4.2 (08.b03). Server, client of both can
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* be started either on Sun's or on Classpath CORBA implementation,
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* in any combinations.
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*
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* BE SURE TO START THE SERVER BEFORE STARTING THE CLIENT.
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*
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* Test invocations using org.omg.CORBA.Request. The methods are
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* called by "name", like in java.lang.reflect.
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* No need to have the local pre-compiled stub classes.
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*
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* @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
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*/
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public class RequestTest
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{
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/*
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* The IOR.txt file, used to find the server and the object on the server. is written when starting the accompanying
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*/
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public static final String IOR_FILE = "IOR.txt";
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/**
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* The Object Request Brocker, used for various CORBA operations.
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*/
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ORB orb;
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/**
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* Our remote object - the invocation target.
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*/
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org.omg.CORBA.Object object;
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/**
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* Prepare for work. Read the file IOR.txt in the current folder
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* and find the server using its information.
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*/
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public static void main(String[] args)
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{
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RequestTest we = new RequestTest();
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we.orb = org.omg.CORBA.ORB.init(new String[ 0 ], null);
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char[] c = null;
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try
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{
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File f = new File(IOR_FILE);
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c = new char[ (int) f.length() ];
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FileReader fr = new FileReader(f);
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fr.read(c);
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fr.close();
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}
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catch (IOException ex)
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{
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System.out.println("Unable to write the IOR.txt into the current folder");
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ex.printStackTrace();
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}
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String ior = new String(c);
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we.object = we.orb.string_to_object(ior);
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we.Demo();
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we.orb.shutdown(false);
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}
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/** Run all demos. */
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public void Demo()
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{
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testHello();
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try
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{
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testParameters();
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}
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catch (Exception ex)
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{
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// Not expected.
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throw new InternalError();
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}
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testSystemException();
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testWideNarrowStrings();
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}
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/**
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* Send the hello message, one way.
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*/
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public void testHello()
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{
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System.out.println("***** Test 'HELLO WORLD' (see the server console).");
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Request hello =
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object._create_request(null, "sayHello", orb.create_list(0), null);
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// No response expected.
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hello.send_oneway();
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}
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/**
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* Test passing various parameters in both directions.
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*/
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public void testParameters()
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throws Exception
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{
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System.out.println("***** Test passing multiple parameters:");
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Request r =
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object._create_request(null, "passSimple", orb.create_list(0), null);
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r.add_inout_arg().insert_octet((byte) 0);
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r.add_in_arg().insert_long(2);
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r.add_inout_arg().insert_short((short) 3);
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r.add_inout_arg().insert_string("[string 4]");
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r.add_out_arg().type(orb.get_primitive_tc(TCKind.tk_double));
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NVList para = r.arguments();
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System.out.println(" --- Parameters before invocation: ");
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System.out.println(" octet " + para.item(0).value().extract_octet());
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System.out.println(" long (in parameter) " +
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para.item(1).value().extract_long()
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);
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System.out.println(" short " + para.item(2).value().extract_short());
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System.out.println(" string " + para.item(3).value().extract_string());
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// For the last parameter, the value is not set.
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r.set_return_type(orb.get_primitive_tc(TCKind.tk_long));
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r.invoke();
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para = r.arguments();
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System.out.println(" --- Parameters after invocation:");
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System.out.println(" octet " + para.item(0).value().extract_octet());
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System.out.println(" long (in parameter, must not be changed) " +
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para.item(1).value().extract_long()
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);
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System.out.println(" short " + para.item(2).value().extract_short());
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System.out.println(" string " + para.item(3).value().extract_string());
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System.out.println(" double " + para.item(4).value().extract_double());
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System.out.println(" Returned value " + r.result().value().extract_long());
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}
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/**
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* Test catching the system exception, thrown on the remote side.
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*/
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public void testSystemException()
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{
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System.out.println("**** Test system exception:");
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try
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{
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ExceptionList exList = orb.create_exception_list();
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exList.add(WeThrowThisExceptionHelper.type());
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Request rq =
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object._create_request(null, "throwException", orb.create_list(1),
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null, exList, null
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);
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rq.add_in_arg().insert_long(-55);
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rq.invoke();
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throw new InternalError();
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}
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catch (BAD_OPERATION ex)
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{
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System.out.println(" The expected BAD_OPERATION, minor code " +
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ex.minor + ", has been thrown on remote side."
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);
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}
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}
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/**
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* Test catching the user exception, thrown on the remote side.
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*/
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public void testUserException()
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{
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System.out.println("**** Test user exception:");
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ExceptionList exList = orb.create_exception_list();
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exList.add(WeThrowThisExceptionHelper.type());
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Request rq =
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object._create_request(null, "throwException", orb.create_list(1), null,
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exList, null
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);
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rq.add_in_arg().insert_long(123);
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rq.invoke();
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UnknownUserException uku = (UnknownUserException) rq.env().exception();
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WeThrowThisException our_exception = WeThrowThisExceptionHelper.extract(uku.except);
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System.out.println(" Our user exception, field " + our_exception.ourField +
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", has been thrown on remote side."
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);
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}
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/**
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* Passes wide (UTF-16) string and narrow (ISO8859_1) string.
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* @see gnu.CORBA.GIOP.CharSets_OSF for supported and default
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* encodings.
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*/
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public void testWideNarrowStrings()
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throws BAD_OPERATION
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{
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System.out.println("**** Test 8 bit and 16 bit char strings");
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Request rq =
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object._create_request(null, "passCharacters", orb.create_list(0), null);
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rq.add_in_arg().insert_wstring("wide string");
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rq.add_in_arg().insert_string("narrow string");
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rq.set_return_type(orb.get_primitive_tc(TCKind.tk_wstring));
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rq.invoke();
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System.out.println(" Returned ' " + rq.result().value().extract_wstring());
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}
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}
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