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package com.ericsson.ssa.config;
import com.ericsson.ssa.sip.Layer;
import java.util.ArrayList;
import java.util.List;
import org.jvnet.glassfish.comms.startup.stack.StackModel;
import java.util.logging.Level;
import org.jvnet.glassfish.comms.util.LogUtil;
import java.util.logging.Logger;
/**
* Dispatcher handler is a singelton which maintains the list of dispatchers. A
* dispatcher is a SIP processing element and determines the processing of SIP
* messages in the container. Dispatchers are configurable and defined in a xml
* file. DispatcherHAndler distinguishes between the following types of
* dispatchers. TransportDispatcher Represents the entry point for SIP i.e. and
* has a listening port for SIP. TransactionDispatcher Represents the entry
* point to the transaction layer, in the case the container is configured to
* run in "transaction" mode ApplicationDispatcher Represent the interface pont
* between the SIP stack and the container. Dispatcher
*/
public final class LayerHandler implements StackModel<Layer> {
private Logger log = LogUtil.SIP_LOGGER.getLogger();
private static LayerHandler layerHandlerInstance = new LayerHandler();
private ArrayList<Layer> m_layers = new ArrayList<Layer>();
/**
* @return The singelton of LayerHandler
*/
public static LayerHandler getInstance() {
return layerHandlerInstance;
}
/**
* Returns the stored chain of layers as a shallow copy.
*
* @return the stored chain of layers as a shallow copy.
*/
public List<Layer> getLayers() {
return new ArrayList<Layer>(m_layers);
}
/**
* Stores the layers in a List and link the new Layer to the Last stored
* layer
*
* @param nextLayer
*/
public void addLayer(Layer nextLayer) {
if (log.isLoggable(Level.FINE)) {
log.log(Level.FINE, "Add layer: "+nextLayer+" to "+m_layers);
}
int currentSize = m_layers.size();
if (currentSize > 0) {
Layer currentLayer = m_layers.get(currentSize - 1);
currentLayer.registerNext(nextLayer);
}
m_layers.add(nextLayer);
}
public void clear() {
m_layers.clear();
}
}