001/*
002  GRANITE DATA SERVICES
003  Copyright (C) 2011 GRANITE DATA SERVICES S.A.S.
004
005  This file is part of Granite Data Services.
006
007  Granite Data Services is free software; you can redistribute it and/or modify
008  it under the terms of the GNU Library General Public License as published by
009  the Free Software Foundation; either version 2 of the License, or (at your
010  option) any later version.
011
012  Granite Data Services is distributed in the hope that it will be useful, but
013  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
014  FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
015  for more details.
016
017  You should have received a copy of the GNU Library General Public License
018  along with this library; if not, see <http://www.gnu.org/licenses/>.
019*/
020
021package org.granite.tide.seam;
022
023import static org.jboss.seam.annotations.Install.FRAMEWORK;
024
025import java.io.Serializable;
026
027import org.granite.tide.seam.async.AsyncContext;
028import org.jboss.seam.Component;
029import org.jboss.seam.ScopeType;
030import org.jboss.seam.annotations.AutoCreate;
031import org.jboss.seam.annotations.Install;
032import org.jboss.seam.annotations.Name;
033import org.jboss.seam.annotations.Scope;
034import org.jboss.seam.annotations.intercept.BypassInterceptors;
035import org.jboss.seam.async.Schedule;
036import org.jboss.seam.core.Events;
037
038
039/**
040 * TideEvents override to intercept Seam events handling
041 * 
042 * @author William DRAI
043 */
044@Name("org.jboss.seam.core.events")
045@Install(precedence=FRAMEWORK)
046@Scope(ScopeType.STATELESS)
047@BypassInterceptors
048@AutoCreate
049public class TideEvents extends Events {
050    
051    
052    @Override
053    public void raiseEvent(String type, Object... parameters) {
054        if (ASYNC_EVENT.equals(type)) {
055                TideInvocation.init();
056            AbstractSeamServiceContext serviceContext = (AbstractSeamServiceContext)Component.getInstance(AbstractSeamServiceContext.COMPONENT_NAME, true);
057            
058            WrappedEvent event = (WrappedEvent)parameters[0];
059            serviceContext.setAsyncContext(event.getAsyncContext());    // Reset context
060            
061            raiseEvent(event.getType(), event.getParams());
062            
063            // Send event through Gravity only 
064            serviceContext.sendEvent(null, null);
065        }
066        else {
067            super.raiseEvent(type, parameters);
068            
069            // Ignore built-in Seam events to avoid stack overflow in component initialization
070            if (!type.startsWith("org.jboss.seam.pre") && !type.startsWith("org.jboss.seam.post")) {
071                // Event should be always handled if we want to allow to send them through Gravity
072                AbstractSeamServiceContext serviceContext = (AbstractSeamServiceContext)Component.getInstance(AbstractSeamServiceContext.COMPONENT_NAME, false);
073                if (serviceContext != null)     // ServiceContext is null during Seam initialization
074                    serviceContext.raiseEvent(type, parameters);
075            }
076        }
077    }
078    
079    
080    protected static final String ASYNC_EVENT = "org.granite.tide.seam.AsyncEvent";
081    
082    protected static class WrappedEvent implements Serializable {
083        
084        private static final long serialVersionUID = 1L;
085        
086        private AsyncContext asyncContext;
087        private String type;
088        private Object[] params;
089        
090        public WrappedEvent(AsyncContext asyncContext, String type, Object[] params) {
091            this.asyncContext = asyncContext;
092            this.type = type;
093            this.params = params;
094        }
095        
096        public AsyncContext getAsyncContext() {
097            return asyncContext;
098        }
099        
100        public String getType() {
101            return type;
102        }
103        
104        public Object[] getParams() {
105            return params;
106        }
107    }
108
109    
110    @Override
111    public void raiseAsynchronousEvent(String type, Object... parameters) {
112        AbstractSeamServiceContext serviceContext = (AbstractSeamServiceContext)Component.getInstance(AbstractSeamServiceContext.COMPONENT_NAME, false);
113        String sessionId = serviceContext != null ? serviceContext.getSessionId() : null;
114        if (serviceContext != null && sessionId != null)
115            super.raiseAsynchronousEvent(ASYNC_EVENT, new WrappedEvent(serviceContext.getAsyncContext(), type, parameters));
116        else
117            super.raiseAsynchronousEvent(type, parameters);
118    }
119    
120    
121    // Seam 2.0
122    @SuppressWarnings("all")
123    public void raiseTimedEvent(String type, Object schedule, Object... parameters) {
124        AbstractSeamServiceContext serviceContext = (AbstractSeamServiceContext)Component.getInstance(AbstractSeamServiceContext.COMPONENT_NAME, false);
125        String sessionId = serviceContext != null ? serviceContext.getSessionId() : null;
126        if (serviceContext != null && sessionId != null)
127            super.raiseTimedEvent(ASYNC_EVENT, (Schedule)schedule, new WrappedEvent(serviceContext.getAsyncContext(), type, parameters));
128        else
129            super.raiseTimedEvent(type, (Schedule)schedule, parameters);
130    }
131}