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// **********************************************************************
//
// Copyright (c) 2003-2014 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
import Demo.*;
public class Client extends Ice.Application
{
class ShutdownHook extends Thread
{
public void
run()
{
try
{
communicator().destroy();
}
catch(Ice.LocalException ex)
{
ex.printStackTrace();
}
}
}
private static void
readline(java.io.BufferedReader in)
{
try
{
in.readLine();
}
catch(java.io.IOException ex)
{
ex.printStackTrace();
}
}
public int
run(String[] args)
{
if(args.length > 0)
{
System.err.println(appName() + ": too many arguments");
return 1;
}
//
// Since this is an interactive demo we want to clear the
// Application installed interrupt callback and install our
// own shutdown hook.
//
setInterruptHook(new ShutdownHook());
InitialPrx initial = InitialPrxHelper.checkedCast(communicator().propertyToProxy("Initial.Proxy"));
if(initial == null)
{
System.err.println("invalid object reference");
return 1;
}
java.io.BufferedReader in = new java.io.BufferedReader(new java.io.InputStreamReader(System.in));
System.out.println();
System.out.println("Let's first transfer a simple object, for a class without");
System.out.println("operations, and print its contents. No factory is required");
System.out.println("for this.");
System.out.println("[press enter]");
readline(in);
Simple simple = initial.getSimple();
System.out.println("==> " + simple.message);
System.out.println();
System.out.println("Yes, this worked. Now let's try to transfer an object for a class");
System.out.println("with operations as type Demo.Printer, without installing a factory first.");
System.out.println("This should give us a `no factory' exception.");
System.out.println("[press enter]");
readline(in);
PrinterHolder printer = new PrinterHolder();
PrinterPrxHolder printerProxy = new PrinterPrxHolder();
boolean gotException = false;
try
{
initial.getPrinter(printer, printerProxy);
System.err.println("Did not get the expected NoObjectFactoryException!");
System.exit(1);
}
catch(Ice.NoObjectFactoryException ex)
{
System.out.println("==> " + ex);
}
System.out.println();
System.out.println("Yep, that's what we expected. Now let's try again, but with");
System.out.println("installing an appropriate factory first. If successful, we print");
System.out.println("the object's content.");
System.out.println("[press enter]");
readline(in);
Ice.ObjectFactory factory = new ObjectFactory();
communicator().addObjectFactory(factory, Demo.Printer.ice_staticId());
initial.getPrinter(printer, printerProxy);
System.out.println("==> " + printer.value.message);
System.out.println();
System.out.println("Cool, it worked! Let's try calling the printBackwards() method");
System.out.println("on the object we just received locally.");
System.out.println("[press enter]");
readline(in);
System.out.print("==> ");
printer.value.printBackwards();
System.out.println();
System.out.println("Now we call the same method, but on the remote object. Watch the");
System.out.println("server's output.");
System.out.println("[press enter]");
readline(in);
printerProxy.value.printBackwards();
System.out.println();
System.out.println("Next, we transfer a derived object from the server as a base");
System.out.println("object. Since we haven't yet installed a factory for the derived");
System.out.println("class, the derived class (Demo.DerivedPrinter) is sliced");
System.out.println("to its base class (Demo.Printer).");
System.out.println("[press enter]");
readline(in);
Printer derivedAsBase = initial.getDerivedPrinter();
System.out.println("==> The type ID of the received object is \"" + derivedAsBase.ice_id() + "\"");
assert(derivedAsBase.ice_id().equals(Demo.Printer.ice_staticId()));
System.out.println();
System.out.println("Now we install a factory for the derived class, and try again.");
System.out.println("Because we receive the derived object as a base object,");
System.out.println("we need to do a class cast to get from the base to the derived object.");
System.out.println("[press enter]");
readline(in);
communicator().addObjectFactory(factory, Demo.DerivedPrinter.ice_staticId());
derivedAsBase = initial.getDerivedPrinter();
DerivedPrinter derived = (Demo.DerivedPrinter)derivedAsBase;
System.out.println("==> class cast to derived object succeeded");
System.out.println("==> The type ID of the received object is \"" + derived.ice_id() + "\"");
System.out.println();
System.out.println("Let's print the message contained in the derived object, and");
System.out.println("call the operation printUppercase() on the derived object");
System.out.println("locally.");
System.out.println("[press enter]");
readline(in);
System.out.println("==> " + derived.derivedMessage);
System.out.print("==> ");
derived.printUppercase();
System.out.println();
System.out.println("Now let's make sure that slice is preserved with [\"preserve-slice\"]");
System.out.println("metadata. We create a derived type on the client and pass it to the");
System.out.println("server, which does not have a factory for the derived type. We do a");
System.out.println("class cast to make sure we can still access the derived type when");
System.out.println("it has been returned from the server.");
System.out.println("[press enter]");
readline(in);
ClientPrinter clientp = new ClientPrinterI();
clientp.message = "a message 4 u";
communicator().addObjectFactory(factory, Demo.ClientPrinter.ice_staticId());
derivedAsBase = initial.updatePrinterMessage(clientp);
clientp = (Demo.ClientPrinter)derivedAsBase;
System.out.println("==> " + clientp.message);
System.out.println();
System.out.println("Finally, we try the same again, but instead of returning the");
System.out.println("derived object, we throw an exception containing the derived");
System.out.println("object.");
System.out.println("[press enter]");
readline(in);
try
{
initial.throwDerivedPrinter();
}
catch(DerivedPrinterException ex)
{
derived = ex.derived;
assert(derived != null);
}
System.out.println("==> " + derived.derivedMessage);
System.out.print("==> ");
derived.printUppercase();
System.out.println();
System.out.println("That's it for this demo. Have fun with Ice!");
initial.shutdown();
return 0;
}
public static void
main(String[] args)
{
Client app = new Client();
int status = app.main("Client", args, "config.client");
System.exit(status);
}
}
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