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Diffstat (limited to 'libjava/classpath/gnu/java/rmi/activation/DefaultActivationGroup.java')
| -rw-r--r-- | libjava/classpath/gnu/java/rmi/activation/DefaultActivationGroup.java | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/rmi/activation/DefaultActivationGroup.java b/libjava/classpath/gnu/java/rmi/activation/DefaultActivationGroup.java new file mode 100644 index 000000000..526d2ef40 --- /dev/null +++ b/libjava/classpath/gnu/java/rmi/activation/DefaultActivationGroup.java @@ -0,0 +1,159 @@ +/* DefaultActivationGroup.java -- Default activation group. + Copyright (C) 2006 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.java.rmi.activation; + +import gnu.java.rmi.server.ActivatableServerRef; +import gnu.java.rmi.server.UnicastServer; + +import java.lang.reflect.Constructor; +import java.rmi.MarshalledObject; +import java.rmi.Remote; +import java.rmi.RemoteException; +import java.rmi.activation.ActivationDesc; +import java.rmi.activation.ActivationException; +import java.rmi.activation.ActivationGroup; +import java.rmi.activation.ActivationGroupID; +import java.rmi.activation.ActivationID; +import java.rmi.activation.UnknownObjectException; + +/** + * The default activation group class. This activation group assumes that + * all classes are accessible via current thread context class loader. + * The remote class loading is not supported for security reasons. The + * activation always occurs in the current jre. + * + * @author Audrius Meskauskas (audriusa@Bioinformatics.org) + */ +public class DefaultActivationGroup + extends ActivationGroup +{ + /** + * Use the serialVersionUID for interoperability. + */ + private static final long serialVersionUID = 1; + + /** + * Used during the group creation (required constructor). + */ + static final Class[] cConstructorTypes = new Class[] + { + ActivationID.class, + MarshalledObject.class + }; + + + /** + * Create the new default activation group. + * + * @param id the group activation id. + * @param data may contain the group initialization data (unused and can be + * null) + * @throws RemoteException if the super constructor does + */ + public DefaultActivationGroup(ActivationGroupID id, MarshalledObject data) + throws RemoteException + { + super(id); + } + + + /** + * May be overridden and used as a hook. This method is called each time + * the new object is instantiated. + */ + public void activeObject(ActivationID id, Remote obj) + throws ActivationException, UnknownObjectException, RemoteException + { + // Nothing to do (the monitor is already notified in newInstance) + } + + /** + * Create the new instance of the object, using the class name and location + * information, stored in the passed descriptor. The method expects the object + * class to have the two parameter constructor, the first parameter being the + * {@link ActivationID} and the second the {@link MarshalledObject}. + * + * @param id the object activation id + * @param desc the activation descriptor, providing the information, necessary + * to create and activate the object + * @return the marshalled object, containing the exported stub of the created + * object + * @throws ActivationException if the activation fails due any reason + */ + public MarshalledObject newInstance(ActivationID id, ActivationDesc desc) + throws ActivationException, RemoteException + { + try + { + if (ActivationSystemTransient.debug) + System.out.println("Instantiating "+desc.getClassName()); + + Remote object; + Class objectClass; + + ClassLoader loader = Thread.currentThread().getContextClassLoader(); + objectClass = loader.loadClass(desc.getClassName()); + Constructor constructor = objectClass.getConstructor(cConstructorTypes); + object = (Remote) constructor.newInstance( + new Object[] { id, desc.getData() }); + + // Make the object accessible and create the stub. + ActivatableServerRef ref = UnicastServer.getActivatableRef(id); + Remote stub = ref.exportObject(object); + + MarshalledObject marsh = new MarshalledObject(stub); + + // Notify the activation monitor. + activeObject(id, marsh); + + // Make call to the hook that may be overridden. + activeObject(id, stub); + + return marsh; + } + catch (Exception e) + { + ActivationException acex = new ActivationException( + "Unable to activate "+ desc.getClassName() + + " from "+ desc.getLocation(), e); + throw acex; + } + } + +} |