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/*
* SIP Communicator, the OpenSource Java VoIP and Instant Messaging client.
*
* Distributable under LGPL license.
* See terms of license at gnu.org.
*/
package net.java.sip.communicator.service.protocol;
import java.util.*;
import net.java.sip.communicator.service.protocol.event.*;
import net.java.sip.communicator.util.*;
/**
* Keeps a list of all calls currently active and maintained by this protocol
* provider. Offers methods for finding a call by its ID, peer session
* and others. This class is meant for use by protocol implementations and
* cannot be accessed from other bundles.
*
* @author Emil Ivov
*/
public class ActiveCallsRepository<T extends Call,
U extends AbstractOperationSetBasicTelephony>
extends CallChangeAdapter
{
/**
* The <tt>Logger</tt> used by the <tt>ActiveCallsRepository</tt>
* class and its instances for logging output.
*/
private static final Logger logger = Logger
.getLogger(ActiveCallsRepository.class.getName());
/**
* A table mapping call ids against call instances.
*/
private Hashtable<String, T> activeCalls
= new Hashtable<String, T>();
/**
* The operation set that created us. Instance is mainly used for firing
* events when necessary.
*/
private final U parentOperationSet;
/**
* Creates a new instance of this repository.
*
* @param opSet a reference to the
* <tt>AbstractOperationSetBasicTelephony</tt> extension that created us.
*/
public ActiveCallsRepository(U opSet)
{
this.parentOperationSet = opSet;
}
/**
* Adds the specified call to the list of calls tracked by this repository.
* @param call CallSipImpl
*/
public void addCall(T call)
{
activeCalls.put(call.getCallID(), call);
call.addCallChangeListener(this);
}
/**
* If <tt>evt</tt> indicates that the call has been ended we remove it from
* the repository.
* @param evt the <tt>CallChangeEvent</tt> instance containing the source
* calls and its old and new state.
*/
public void callStateChanged(CallChangeEvent evt)
{
if(evt.getEventType().equals(CallChangeEvent.CALL_STATE_CHANGE)
&& evt.getNewValue().equals(CallState.CALL_ENDED))
{
T sourceCall =
this.activeCalls.remove(evt.getSourceCall().getCallID());
if (logger.isTraceEnabled())
logger.trace("Removing call " + sourceCall + " from the list of "
+ "active calls because it entered an ENDED state");
this.parentOperationSet.fireCallEvent(
CallEvent.CALL_ENDED, sourceCall);
}
}
/**
* Returns an iterator over all currently active (non-ended) calls.
*
* @return an iterator over all currently active (non-ended) calls.
*/
public Iterator<T> getActiveCalls()
{
synchronized(activeCalls)
{
return new LinkedList<T>(activeCalls.values()).iterator();
}
}
/**
* Returns the number of calls currently tracked by this repository.
*
* @return the number of calls currently tracked by this repository.
*/
public int getActiveCallCount()
{
synchronized (activeCalls)
{
return this.activeCalls.size();
}
}
}
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