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// **********************************************************************
//
// Copyright (c) 2002
// ZeroC, Inc.
// Billerica, MA, USA
//
// All Rights Reserved.
//
// Ice is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License version 2 as published by
// the Free Software Foundation.
//
// **********************************************************************
public class Client
{
private static void
readline(java.io.BufferedReader in)
{
try
{
in.readLine();
}
catch(java.io.IOException ex)
{
ex.printStackTrace();
}
}
private static int
run(String[] args, Ice.Communicator communicator)
{
Ice.Properties properties = communicator.getProperties();
final String refProperty = "Value.Initial";
String ref = properties.getProperty(refProperty);
if(ref.length() == 0)
{
System.err.println("property `" + refProperty + "' not set");
return 1;
}
Ice.ObjectPrx base = communicator.stringToProxy(ref);
InitialPrx initial = InitialPrxHelper.checkedCast(base);
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("Ok, this worked. Now let's try to transfer an object for a class");
System.out.println("with operations, without installing a factory first. This should");
System.out.println("give us a `no factory' exception.");
System.out.println("[press enter]");
readline(in);
PrinterHolder printer = new PrinterHolder();
PrinterPrxHolder printerProxy = new PrinterPrxHolder();
try
{
initial.getPrinter(printer, printerProxy);
}
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, "::Printer");
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(null);
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 base");
System.out.println("object. Since we didn't install a factory for the derived");
System.out.println("class yet, we will get another `no factory' exception.");
System.out.println("[press enter]");
readline(in);
Printer derivedAsBase;
try
{
derivedAsBase = initial.getDerivedPrinter();
assert(false);
}
catch(Ice.NoObjectFactoryException ex)
{
System.out.println("==> " + ex);
}
System.out.println();
System.out.println("Now we install a factory for the derived class, and try again.");
System.out.println("We won't get a `no factory' exception anymore, but since we");
System.out.println("receive the derived object as base object, we need to do a");
System.out.println("dynamic_cast<> to get from the base to the derived object.");
System.out.println("[press enter]");
readline(in);
communicator.addObjectFactory(factory, "::DerivedPrinter");
derivedAsBase = initial.getDerivedPrinter();
DerivedPrinter derived = (DerivedPrinter)derivedAsBase;
System.out.println("==> dynamic_cast<> to derived object succeded");
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(null);
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(null);
System.out.println();
System.out.println("That's it for this demo. Have fun with Ice!");
return 0;
}
public static void
main(String[] args)
{
int status = 0;
Ice.Communicator communicator = null;
try
{
Ice.Properties properties = Ice.Util.createProperties(args);
properties.load("config");
communicator = Ice.Util.initializeWithProperties(args, properties);
status = run(args, communicator);
}
catch(Ice.LocalException ex)
{
ex.printStackTrace();
status = 1;
}
if(communicator != null)
{
try
{
communicator.destroy();
}
catch(Ice.LocalException ex)
{
ex.printStackTrace();
status = 1;
}
}
System.exit(status);
}
}
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