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
021 package org.granite.tide.seam;
022
023 import static org.jboss.seam.annotations.Install.FRAMEWORK;
024
025 import java.io.Serializable;
026
027 import org.granite.tide.seam.async.AsyncContext;
028 import org.jboss.seam.Component;
029 import org.jboss.seam.ScopeType;
030 import org.jboss.seam.annotations.AutoCreate;
031 import org.jboss.seam.annotations.Install;
032 import org.jboss.seam.annotations.Name;
033 import org.jboss.seam.annotations.Scope;
034 import org.jboss.seam.annotations.intercept.BypassInterceptors;
035 import org.jboss.seam.async.Schedule;
036 import 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
049 public class TideEvents extends Events {
050
051 private static final long serialVersionUID = -5395975397632138270L;
052
053
054 @Override
055 public void raiseEvent(String type, Object... parameters) {
056 if (ASYNC_EVENT.equals(type)) {
057 TideInvocation.init();
058 AbstractSeamServiceContext serviceContext = (AbstractSeamServiceContext)Component.getInstance(AbstractSeamServiceContext.COMPONENT_NAME, true);
059
060 WrappedEvent event = (WrappedEvent)parameters[0];
061 serviceContext.setAsyncContext(event.getAsyncContext()); // Reset context
062
063 raiseEvent(event.getType(), event.getParams());
064
065 // Send event through Gravity only
066 serviceContext.sendEvent(null, null);
067 }
068 else {
069 super.raiseEvent(type, parameters);
070
071 // Ignore built-in Seam events to avoid stack overflow in component initialization
072 if (!type.startsWith("org.jboss.seam.pre") && !type.startsWith("org.jboss.seam.post")) {
073 // Event should be always handled if we want to allow to send them through Gravity
074 AbstractSeamServiceContext serviceContext = (AbstractSeamServiceContext)Component.getInstance(AbstractSeamServiceContext.COMPONENT_NAME, false);
075 if (serviceContext != null) // ServiceContext is null during Seam initialization
076 serviceContext.raiseEvent(type, parameters);
077 }
078 }
079 }
080
081
082 protected static final String ASYNC_EVENT = "org.granite.tide.seam.AsyncEvent";
083
084 protected static class WrappedEvent implements Serializable {
085
086 private static final long serialVersionUID = 1L;
087
088 private AsyncContext asyncContext;
089 private String type;
090 private Object[] params;
091
092 public WrappedEvent(AsyncContext asyncContext, String type, Object[] params) {
093 this.asyncContext = asyncContext;
094 this.type = type;
095 this.params = params;
096 }
097
098 public AsyncContext getAsyncContext() {
099 return asyncContext;
100 }
101
102 public String getType() {
103 return type;
104 }
105
106 public Object[] getParams() {
107 return params;
108 }
109 }
110
111
112 @Override
113 public void raiseAsynchronousEvent(String type, Object... parameters) {
114 AbstractSeamServiceContext serviceContext = (AbstractSeamServiceContext)Component.getInstance(AbstractSeamServiceContext.COMPONENT_NAME, false);
115 String sessionId = serviceContext != null ? serviceContext.getSessionId() : null;
116 if (serviceContext != null && sessionId != null)
117 super.raiseAsynchronousEvent(ASYNC_EVENT, new WrappedEvent(serviceContext.getAsyncContext(), type, parameters));
118 else
119 super.raiseAsynchronousEvent(type, parameters);
120 }
121
122
123 // Seam 2.0
124 @SuppressWarnings("all")
125 public void raiseTimedEvent(String type, Object schedule, Object... parameters) {
126 AbstractSeamServiceContext serviceContext = (AbstractSeamServiceContext)Component.getInstance(AbstractSeamServiceContext.COMPONENT_NAME, false);
127 String sessionId = serviceContext != null ? serviceContext.getSessionId() : null;
128 if (serviceContext != null && sessionId != null)
129 super.raiseTimedEvent(ASYNC_EVENT, (Schedule)schedule, new WrappedEvent(serviceContext.getAsyncContext(), type, parameters));
130 else
131 super.raiseTimedEvent(type, (Schedule)schedule, parameters);
132 }
133 }