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// **********************************************************************
//
// Copyright (c) 2003-2009 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.
//
// **********************************************************************
package IceInternal;
public class EndpointHostResolver
{
EndpointHostResolver(Instance instance)
{
_instance = instance;
try
{
_thread = new HelperThread();
if(_instance.initializationData().properties.getProperty("Ice.ThreadPriority").length() > 0)
{
_thread.setPriority(Util.getThreadPriorityProperty(_instance.initializationData().properties, "Ice"));
}
_thread.start();
}
catch(RuntimeException ex)
{
String s = "cannot create thread for endpoint host resolver thread:\n" + Ex.toString(ex);
_instance.initializationData().logger.error(s);
throw ex;
}
}
synchronized public void
resolve(String host, int port, EndpointI endpoint, EndpointI_connectors callback)
{
//
// TODO: Optimize to avoid the lookup if the given host is a textual IPv4 or IPv6
// address. This requires implementing parsing of IPv4/IPv6 addresses (Java does
// not provide such methods).
//
assert(!_destroyed);
ResolveEntry entry = new ResolveEntry();
entry.host = host;
entry.port = port;
entry.endpoint = endpoint;
entry.callback = callback;
_queue.add(entry);
notify();
}
synchronized public void
destroy()
{
assert(!_destroyed);
_destroyed = true;
notify();
}
public void
joinWithThread()
{
if(_thread != null)
{
try
{
_thread.join();
}
catch(InterruptedException ex)
{
}
}
}
public void
run()
{
while(true)
{
ResolveEntry resolve;
synchronized(this)
{
while(!_destroyed && _queue.isEmpty())
{
try
{
wait();
}
catch(java.lang.InterruptedException ex)
{
}
}
if(_destroyed)
{
break;
}
resolve = (ResolveEntry)_queue.removeFirst();
}
try
{
resolve.callback.connectors(
resolve.endpoint.connectors(
Network.getAddresses(resolve.host, resolve.port, _instance.protocolSupport())));
}
catch(Ice.LocalException ex)
{
resolve.callback.exception(ex);
}
}
for(ResolveEntry p : _queue)
{
p.callback.exception(new Ice.CommunicatorDestroyedException());
}
_queue.clear();
}
static class ResolveEntry
{
String host;
int port;
EndpointI endpoint;
EndpointI_connectors callback;
}
private final Instance _instance;
private boolean _destroyed;
private java.util.LinkedList<ResolveEntry> _queue = new java.util.LinkedList<ResolveEntry>();
private final class HelperThread extends Thread
{
HelperThread()
{
String threadName = _instance.initializationData().properties.getProperty("Ice.ProgramName");
if(threadName.length() > 0)
{
threadName += "-";
}
setName(threadName + "Ice.EndpointHostResolverThread");
}
public void
run()
{
try
{
EndpointHostResolver.this.run();
}
catch(java.lang.Exception ex)
{
String s = "exception in endpoint host resolver thread " + getName() + ":\n" + Ex.toString(ex);
_instance.initializationData().logger.error(s);
}
}
}
private HelperThread _thread;
}
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