EntityEjbHomeHandler


1   /**
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3    * ("Software"), with or without modification, are permitted provided
4    * that the following conditions are met:
5    *
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8    *    copy of this document.
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11   *    above copyright notice, this list of conditions and the
12   *    following disclaimer in the documentation and/or other
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14   *
15   * 3. The name "Exolab" must not be used to endorse or promote
16   *    products derived from this Software without prior written
17   *    permission of Exoffice Technologies.  For written permission,
18   *    please contact info@exolab.org.
19   *
20   * 4. Products derived from this Software may not be called "Exolab"
21   *    nor may "Exolab" appear in their names without prior written
22   *    permission of Exoffice Technologies. Exolab is a registered
23   *    trademark of Exoffice Technologies.
24   *
25   * 5. Due credit should be given to the Exolab Project
26   *    (http://www.exolab.org/).
27   *
28   * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
29   * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
30   * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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37   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
39   * OF THE POSSIBILITY OF SUCH DAMAGE.
40   *
41   * Copyright 1999 (C) Exoffice Technologies Inc. All Rights Reserved.
42   *
43   * $Id: EntityEjbHomeHandler.java 2487 2006-02-22 22:05:03Z dblevins $
44   */
45  package org.openejb.core.entity;
46  
47  import java.lang.reflect.Method  ;
48  import java.util.Vector  ;
49  
50  import org.openejb.ProxyInfo;
51  import org.openejb.RpcContainer;
52  import org.openejb.core.ivm.EjbHomeProxyHandler;
53  import org.openejb.core.ivm.EjbObjectProxyHandler;
54  import org.openejb.util.proxy.ProxyManager;
55  
56  
57  /**
58   * This InvocationHandler and its proxy are serializable and can be used by
59   * HomeHandle, Handle, and MetaData to persist and revive handles. It maintains
60   * its original client identity which allows the container to be more discerning about
61   * allowing the revieed proxy to be used. See StatefulContaer manager for more details.
62   * 
63   * @author <a HREF="mailto:david.blevins@visi.com">David Blevins</a>
64   * @author <a HREF="mailto:Richard@Monson-Haefel.com">Richard Monson-Haefel</a>
65   */
66  public class EntityEjbHomeHandler extends EjbHomeProxyHandler {
67      
68      public EntityEjbHomeHandler(RpcContainer container, Object   pk, Object   depID){
69          super(container, pk, depID);
70      }
71      
72      protected Object   createProxy(ProxyInfo proxyInfo){
73          Object   proxy = super.createProxy(proxyInfo);
74          EjbObjectProxyHandler handler = (EjbObjectProxyHandler)ProxyManager.getInvocationHandler(proxy);
75          
76          /* 
77          * Register the handle with the BaseEjbProxyHandler.liveHandleRegistry
78          * If the bean is removed by its home or by an identical proxy, then the 
79          * this proxy will be automatically invalidated because its properly registered
80          * with the liveHandleRegistry.
81          */
82          registerHandler(handler.getRegistryId(),handler);
83          
84          return proxy;
85      
86      }
87      /**
88       * <P>
89       * Locates and returns a new EJBObject or a collection
90       * of EJBObjects.  The EJBObject(s) is a new proxy with
91       * a new handler. This implementation should not be
92       * sent outside the virtual machine.
93       * </P>
94       * <P>
95       * This method propogates to the container
96       * system.
97       * </P>
98       * <P>
99       * The find method is required to be defined
100      * by the bean's home interface of Entity beans.
101      * </P>
102      *
103      * @param method
104      * @param args
105      * @param proxy
106      * @return Returns an new EJBObject proxy and handler
107      * @exception Throwable
108      */
109     protected Object   findX(Method   method, Object  [] args, Object   proxy) throws Throwable   {
110         Object   retValue = container.invoke(deploymentID,method,args,null, getThreadSpecificSecurityIdentity());
111 
112         if ( retValue instanceof java.util.Collection   ) {
113             Object   [] proxyInfos = ((java.util.Collection  )retValue).toArray();
114             Vector   proxies = new Vector  ();
115             for ( int i = 0; i < proxyInfos.length; i++ ) {
116                 proxies.addElement( createProxy((ProxyInfo)proxyInfos[i]) );
117             }
118             return proxies;
119         }else if ( retValue instanceof org.openejb.util.ArrayEnumeration ) {
120             org.openejb.util.ArrayEnumeration enumeration = (org.openejb.util.ArrayEnumeration) retValue;
121             for ( int i = enumeration.size()-1; i >=0 ; --i ) {
122                 enumeration.set( i, createProxy((ProxyInfo)enumeration.get(i)) );
123             }
124             return enumeration;
125         }else if ( retValue instanceof java.util.Enumeration   ) {
126             java.util.Enumeration   enumeration = (java.util.Enumeration  ) retValue;
127             // Don't use Vector, because it contains unnecessary synchronization
128             java.util.List   proxies = new java.util.ArrayList  ();
129             while ( enumeration.hasMoreElements() ) {
130                 proxies.add( createProxy((ProxyInfo)enumeration.nextElement()) );
131             }
132                 return new org.openejb.util.ArrayEnumeration(proxies);
133         } else {
134             org.openejb.ProxyInfo proxyInfo = (org.openejb.ProxyInfo) retValue;
135 
136 
137             return createProxy(proxyInfo); 
138         }
139 
140     }
141     /**
142      * <P>
143      * Attempts to remove an EJBObject from the
144      * container system.  The EJBObject to be removed
145      * is represented by the primaryKey passed
146      * into the remove method of the EJBHome.
147      * </P>
148      * <P>
149      * This method propogates to the container system.
150      * </P>
151      * <P>
152      * remove(Object primary) is a method of javax.ejb.EJBHome
153      * </P>
154      * <P>
155      * Checks if the caller is authorized to invoke the
156      * javax.ejb.EJBHome.remove on the EJBHome of the
157      * deployment.
158      * </P>
159      *
160      * @param method
161      * @param args
162      * @return Returns null
163      * @exception Throwable
164      * @see javax.ejb.EJBHome
165      * @see javax.ejb.EJBHome#remove
166      */
167     protected Object   removeByPrimaryKey(Method   method, Object  [] args, Object   proxy) throws Throwable  {
168         Object   primKey = args[0];
169         container.invoke(deploymentID, method, args, primKey, getThreadSpecificSecurityIdentity());
170             
171         /* 
172         * This operation takes care of invalidating all the EjbObjectProxyHanders associated with 
173         * the same RegistryId. See this.createProxy().
174         */
175         invalidateAllHandlers(EntityEjbObjectHandler.getRegistryId(primKey,deploymentID,container));
176         return null;
177     }
178     
179     protected EjbObjectProxyHandler newEjbObjectHandler(RpcContainer container, Object   pk, Object   depID) {
180         return new EntityEjbObjectHandler(container, pk, depID);
181     }
182     
183 }
184
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