001/**
002 *   GRANITE DATA SERVICES
003 *   Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004 *
005 *   This file is part of the Granite Data Services Platform.
006 *
007 *   Granite Data Services is free software; you can redistribute it and/or
008 *   modify it under the terms of the GNU Lesser General Public
009 *   License as published by the Free Software Foundation; either
010 *   version 2.1 of the License, or (at your option) any later version.
011 *
012 *   Granite Data Services is distributed in the hope that it will be useful,
013 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
014 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
015 *   General Public License for more details.
016 *
017 *   You should have received a copy of the GNU Lesser General Public
018 *   License along with this library; if not, write to the Free Software
019 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
020 *   USA, or see <http://www.gnu.org/licenses/>.
021 */
022package org.granite.tide.seam.async;
023
024import java.lang.annotation.Annotation;
025import java.util.Date;
026
027import org.granite.tide.seam.AbstractSeamServiceContext;
028import org.granite.tide.seam.TideInvocation;
029import org.jboss.seam.Component;
030import org.jboss.seam.annotations.async.Asynchronous;
031import org.jboss.seam.annotations.async.Duration;
032import org.jboss.seam.annotations.async.Expiration;
033import org.jboss.seam.annotations.async.FinalExpiration;
034import org.jboss.seam.annotations.async.IntervalCron;
035import org.jboss.seam.annotations.async.IntervalDuration;
036import org.jboss.seam.annotations.intercept.AroundInvoke;
037import org.jboss.seam.annotations.intercept.Interceptor;
038import org.jboss.seam.annotations.intercept.InterceptorType;
039import org.jboss.seam.async.AbstractDispatcher;
040import org.jboss.seam.async.AsynchronousInterceptor;
041import org.jboss.seam.contexts.Contexts;
042import org.jboss.seam.intercept.AbstractInterceptor;
043import org.jboss.seam.intercept.InvocationContext;
044
045/**
046 * Slightly modified version of the Seam asynchronous interceptor which saves the current username
047 * 
048 * Dispatches method calls to @Asynchronous methods
049 * asynchronously, and returns the "timer" object
050 * if necessary.
051 * 
052 * @author William DRAI
053 *
054 */
055@Interceptor(stateless=true, type=InterceptorType.CLIENT, around={ AsynchronousInterceptor.class })
056public class TideAsynchronousInterceptor extends AbstractInterceptor {
057    
058    private static final long serialVersionUID = 9194177339867853303L;
059    
060    
061    @AroundInvoke
062    public Object aroundInvoke(InvocationContext invocation) throws Exception {
063        if (invocation.getTarget() instanceof AsynchronousInvoker) {
064                if (Contexts.getEventContext().isSet(AbstractDispatcher.EXECUTING_ASYNCHRONOUS_CALL))
065                        TideInvocation.init();
066            return invocation.proceed();
067        }
068        
069        boolean scheduleAsync = invocation.getMethod().isAnnotationPresent(Asynchronous.class) && 
070            (!Contexts.getEventContext().isSet(AbstractDispatcher.EXECUTING_ASYNCHRONOUS_CALL) 
071                    || Contexts.getEventContext().isSet("org.jboss.seam.async.AsynchronousIntercepter.REENTRANT"));
072        if (scheduleAsync) {
073            AbstractSeamServiceContext serviceContext = (AbstractSeamServiceContext)Component.getInstance(AbstractSeamServiceContext.COMPONENT_NAME, false);
074            if (serviceContext != null && serviceContext.getSessionId() != null) {
075                Annotation[][] parameterAnnotations = invocation.getMethod().getParameterAnnotations();
076                Long duration = null;
077                Date expiration = null;
078                Date finalExpiration = null;
079                Long intervalDuration = null;
080                String intervalCron = null;
081                for (int i = 0; i < parameterAnnotations.length; i++) {
082                    Annotation[] annotations = parameterAnnotations[i];
083                    for (Annotation annotation : annotations) {
084                        if (annotation.annotationType().equals(Duration.class))
085                            duration = (Long)invocation.getParameters()[i];
086                        else if (annotation.annotationType().equals(Expiration.class))
087                            expiration = (Date)invocation.getParameters()[i];
088                        else if (annotation.annotationType().equals(FinalExpiration.class))
089                            finalExpiration = (Date)invocation.getParameters()[i];
090                        else if (annotation.annotationType().equals(IntervalDuration.class))
091                            intervalDuration = (Long)invocation.getParameters()[i];
092                        else if (annotation.annotationType().equals(IntervalCron.class))
093                            intervalCron = (String)invocation.getParameters()[i];
094                    }
095                }
096                
097                String targetComponentName = getComponent().getName();
098                Class<?> targetComponentClass = getComponent().getBeanClass();
099                String methodName = invocation.getMethod().getName();
100                Class<?>[] paramTypes = invocation.getMethod().getParameterTypes();
101                Object[] params = invocation.getParameters();
102                
103                AsynchronousInvoker invoker = (AsynchronousInvoker)Component.getInstance("org.granite.tide.seam.asynchronousInvoker");
104                
105                AsyncContext asyncContext = serviceContext.getAsyncContext();
106                
107                if (intervalCron != null)
108                    return invoker.invokeAsynchronousCron(asyncContext, targetComponentName, targetComponentClass, methodName, paramTypes, params, 
109                            duration, expiration, finalExpiration, intervalCron);
110                
111                if (finalExpiration != null)
112                    return invoker.invokeAsynchronousDuration(asyncContext, targetComponentName, targetComponentClass, methodName, paramTypes, params, 
113                            duration, expiration, finalExpiration, intervalDuration);
114                
115                return invoker.invokeAsynchronousDuration(asyncContext, targetComponentName, targetComponentClass, methodName, paramTypes, params, 
116                        duration, expiration, intervalDuration);
117            }
118        }
119        
120        return invocation.proceed();
121    }
122
123        // Needed for Seam 2.1
124    public boolean isInterceptorEnabled() {
125        return true;
126    }
127}