com.sun.enterprise.web.connector.grizzly.comet.CometContext Maven / Gradle / Ivy

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package com.sun.enterprise.web.connector.grizzly.comet;

import java.io.IOException;
import java.util.Iterator;
import java.util.concurrent.ConcurrentHashMap;

/**
 * The main object used by {@link CometHandler}. 
 * The {@link CometContext} is always available for {@link CometHandler}
 * and can be used to invokeCometHandler other {@link CometHandler}.
 *
 * Attributes can be added/removed the same way HttpServletSession 
 * is doing. It is not recommended to use attributes if this 
 * {@link CometContext} is not shared amongs multiple
 * context path (uses HttpServletSession instead).
 *
 * @author Jeanfrancois Arcand
 * @deprecated use {@link CometContext}
 */
public class CometContext extends com.sun.grizzly.comet.CometContext{
   
    protected final CometEvent eventInitialize;
   
    protected final CometEvent eventInterrupt;

    protected final CometEvent eventTerminate;
    
    /**
     * {@inheritDoc}
     */ 
    public CometContext(String contextPath, int continuationType) {
        super(contextPath, continuationType);
        this.eventInterrupt   = new CometEvent(CometEvent.INTERRUPT,this);
        this.eventInitialize  = new CometEvent(CometEvent.INITIALIZE,this);
        this.eventTerminate   = new CometEvent(CometEvent.TERMINATE,this,this);
    }
    
    
    protected void setTopic(String topic){
        this.topic = topic;
    }
    
    /**
     * {@inheritDoc}
     */     
    @Override
    public CometHandler getCometHandler(int hashCode){
        return (CometHandler) super.getCometHandler(hashCode);
    }      
    

    /**
     * Resume the Comet request and remove it from the active {@link CometHandler} list. Once resumed,
     * a CometHandler must never manipulate the HttpServletRequest or HttpServletResponse as
     * those object will be recycled and may be re-used to serve another request.
     *
     * If you cache them for later reuse by another thread there is a
     * possibility to introduce corrupted responses next time a request is made.
     * @param handler The CometHandler to resume.
     * @return true if the operation succeeded.
     */
    @Override
    public boolean resumeCometHandler(com.sun.grizzly.comet.CometHandler handler){
        boolean status = CometEngine.getEngine().interrupt(handlers.get(handler),false);
        if (status){
            try {
                handler.onTerminate(eventTerminate);
            } catch (IOException ignored) { }
        }
        return status;
    }
    
    /**
     * {@inheritDoc}
     */ 
    @Override
    public void notify(final Object attachment) throws IOException {
        CometEvent event = new CometEvent(CometEvent.NOTIFY,this);
        event.attach(attachment);
        Iterator iterator = handlers.keySet().iterator();
        notificationHandler.setBlockingNotification(blockingNotification);
        notificationHandler.notify((com.sun.grizzly.comet.CometEvent)event,iterator);
        resetSuspendIdleTimeout();
    }

    /**
     * {@inheritDoc}
     */  
    @Override
    public void notify(final Object attachment,final int eventType,final int cometHandlerID)
            throws IOException{   
        CometHandler cometHandler = getCometHandler(cometHandlerID);
  
        if (cometHandler == null){
            throw new IllegalStateException(INVALID_COMET_HANDLER);
        }
        CometEvent event = new CometEvent(eventType,this);
        event.attach(attachment);
        
        notificationHandler.setBlockingNotification(blockingNotification);        
        notificationHandler.notify(event,cometHandler);
        if (event.getType() != CometEvent.TERMINATE
            && event.getType() != CometEvent.INTERRUPT) {
            resetSuspendIdleTimeout(); 
        }
    }
    
    /**
     * Return the internal list of active {@link CometHandler}
     * @return Return the internal list of active {@link CometHandler}
     */
    @Override
    protected ConcurrentHashMap handlers(){
        return handlers;
    }
    
    /**
     * {@inheritDoc}
     */     
    @Override
    protected void initialize(com.sun.grizzly.comet.CometHandler handler) throws IOException {
        ((com.sun.enterprise.web.connector.grizzly.comet.CometHandler)handler).onInitialize(eventInitialize); 
    }
    
}