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// **********************************************************************
//
// Copyright (c) 2003-2006 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 Subscriber extends Ice.Application
{
public int
run(String[] args)
{
Ice.Properties properties = communicator().getProperties();
final String proxyProperty = "IceStorm.TopicManager.Proxy";
String proxy = properties.getProperty(proxyProperty);
if(proxy == null)
{
System.err.println("property `" + proxyProperty + "' not set");
return 1;
}
Ice.ObjectPrx base = communicator().stringToProxy(proxy);
IceStorm.TopicManagerPrx manager = IceStorm.TopicManagerPrxHelper.checkedCast(base);
if(manager == null)
{
System.err.println("invalid proxy");
return 1;
}
//
// Gather the set of topics to which to subscribe. It is either
// the set provided on the command line, or the topic "time".
//
java.util.List topics = new java.util.ArrayList();;
if(args.length > 1)
{
for(int i = 0; i < args.length; ++i)
{
topics.add(args[i]);
}
}
else
{
topics.add("time");
}
//
// Set the requested quality of service "reliability" =
// "batch". This tells IceStorm to send events to the subscriber
// in batches at regular intervals.
//
java.util.Map qos = new java.util.HashMap();
qos.put("reliability", "batch");
//
// Create the servant to receive the events.
//
Ice.ObjectAdapter adapter = communicator().createObjectAdapter("Clock.Subscriber");
Ice.Object clock = new ClockI();
//
// List of all subscribers.
//
java.util.Map subscribers = new java.util.HashMap();;
//
// Add the servant to the adapter for each topic. A ServantLocator
// could have been used for the same purpose.
//
java.util.Iterator p = topics.iterator();
while(p.hasNext())
{
String name = (String)p.next();
//
// Add a Servant for the Ice Object.
//
Ice.ObjectPrx object = adapter.addWithUUID(clock);
try
{
IceStorm.TopicPrx topic = manager.retrieve(name);
topic.subscribe(qos, object);
}
catch(IceStorm.NoSuchTopic e)
{
System.err.println(e + " name: " + e.name);
break;
}
//
// Add to the set of subscribers _after_ subscribing. This
// ensures that only subscribed subscribers are unsubscribed
// in the case of an error.
//
subscribers.put(name, object);
}
//
// Unless there is a subscriber per topic then there was some
// problem. If there was an error the application should terminate
// without accepting any events.
//
if(subscribers.size() == topics.size())
{
adapter.activate();
shutdownOnInterrupt();
communicator().waitForShutdown();
}
//
// Unsubscribe all subscribed objects.
//
p = subscribers.entrySet().iterator();
while(p.hasNext())
{
java.util.Map.Entry entry = (java.util.Map.Entry)p.next();
try
{
IceStorm.TopicPrx topic = manager.retrieve((String)entry.getKey());
topic.unsubscribe((Ice.ObjectPrx)entry.getValue());
}
catch(IceStorm.NoSuchTopic e)
{
System.err.println(e + " name: " + e.name);
}
}
return 0;
}
public static void
main(String[] args)
{
Subscriber app = new Subscriber();
int status = app.main("Subscriber", args, "config");
System.exit(status);
}
}
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