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1 files changed, 340 insertions, 0 deletions

diff --git a/libjava/classpath/java/rmi/activation/ActivationGroup.java b/libjava/classpath/java/rmi/activation/ActivationGroup.java
new file mode 100644
index 000000000..230c71455
--- /dev/null
+++ b/libjava/classpath/java/rmi/activation/ActivationGroup.java
@@ -0,0 +1,340 @@
+/* ActivationGroup.java -- the RMI activation group.
+   Copyright (c) 1996, 1997, 1998, 1999, 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 java.rmi.activation;
+
+import gnu.java.rmi.activation.DefaultActivationGroup;
+import gnu.java.rmi.activation.DefaultActivationSystem;
+
+import java.lang.reflect.Constructor;
+import java.rmi.MarshalledObject;
+import java.rmi.Remote;
+import java.rmi.RemoteException;
+import java.rmi.server.UnicastRemoteObject;
+
+/**
+ * The entity that receives the request to activate object and activates it.
+ * Frequently there is one activation group per virtual machine.
+ *
+ * @author Audrius Meskauskas (audriusa@Bioinformatics.org) (from stub)
+ */
+public abstract class ActivationGroup
+    extends UnicastRemoteObject
+    implements ActivationInstantiator
+{
+
+  /**
+   * Use the SVUID for interoperability.
+   */
+  static final long serialVersionUID = - 7696947875314805420L;
+
+  /**
+   * The Id of the current group on this VM (null if none).
+   */
+  static ActivationGroupID currentGroupId = null;
+
+  /**
+   * The groups identifier.
+   */
+  final ActivationGroupID groupId;
+
+  /**
+   * The groups activation monitor.
+   */
+  ActivationMonitor monitor;
+
+  /**
+   * The groups incarnation number.
+   */
+  long incarnation;
+
+  /**
+   * The groups activation system.
+   */
+  static ActivationSystem system;
+
+  /**
+   * Used during the group creation (required constructor).
+   */
+  static final Class[] cConstructorTypes = new Class[]
+                                                   {
+                                                    ActivationGroupID.class,
+                                                    MarshalledObject.class
+                                                   };
+
+  /**
+   * Create the new activation group with the given group id.
+   *
+   * @param aGroupId the group Id.
+   *
+   * @throws RemoteException if the group export fails.
+   */
+  protected ActivationGroup(ActivationGroupID aGroupId) throws RemoteException
+  {
+    groupId = aGroupId;
+  }
+
+  /**
+   * The method is called when the object is exported. The group must notify
+   * the activation monitor, if this was not already done before.
+   *
+   * @param id the object activation id
+   * @param obj the remote object implementation
+   *
+   * @throws ActivationException if the group is inactive
+   * @throws UnknownObjectException if such object is not known
+   * @throws RemoteException if the call to monitor fails
+   */
+  public abstract void activeObject(ActivationID id, Remote obj)
+      throws ActivationException, UnknownObjectException, RemoteException;
+
+  /**
+   * Notifies the monitor about the object being inactivated.
+   *
+   * @param id the object being inactivated.
+   * @return true always (must be overridden to return other values).
+   * @throws ActivationException never
+   * @throws UnknownObjectException if the object is not known
+   * @throws RemoteException if the remote call to monitor fails
+   */
+  public boolean inactiveObject(ActivationID id) throws ActivationException,
+      UnknownObjectException, RemoteException
+  {
+    if (monitor != null)
+      monitor.inactiveObject(id);
+    return true;
+  }
+
+  /**
+   * Create the new instance of the activation group, using the class name and
+   * location information, stored in the passed descriptor. The method expects
+   * the group class to have the two parameter constructor, the first parameter
+   * being the {@link ActivationGroupID} and the second the
+   * {@link MarshalledObject}. The group must be first be registered with the
+   * ActivationSystem. Once a group is created, the currentGroupID method
+   * returns the identifier for this group until the group becomes inactive.
+   *
+   * @param id the activation group id
+   * @param desc the group descriptor, providing the information, necessary to
+   *          create the group
+   * @param incarnation the incarnation number
+   * @return the created group instance
+   * @throws ActivationException if the activation fails due any reason
+   */
+  public static ActivationGroup createGroup(ActivationGroupID id,
+                                            ActivationGroupDesc desc,
+                                            long incarnation)
+      throws ActivationException
+  {
+    // If the activation system is not yet set, set it to the system.
+    // passed in the group id.
+    if (system == null)
+      system = id.system;
+
+    ActivationGroup group = null;
+
+    // TODO at the moment all groups are created on the current jre and the
+    // group class must be reachable via thread context class loader.
+    Class groupClass;
+
+    if (desc.className != null)
+      {
+        try
+          {
+            ClassLoader loader = Thread.currentThread().getContextClassLoader();
+            groupClass = loader.loadClass(desc.className);
+          }
+        catch (ClassNotFoundException e)
+          {
+            ActivationException acex = new ActivationException(
+              "Cannot load " + desc.className);
+            acex.detail = e;
+            throw acex;
+          }
+      }
+    else
+      groupClass = DefaultActivationGroup.class;
+
+    try
+      {
+        Constructor constructor = groupClass.getConstructor(cConstructorTypes);
+        group = (ActivationGroup) constructor.newInstance(
+          new Object[] { id, desc.data });
+      }
+    catch (Exception e)
+      {
+        ActivationException acex = new ActivationException(
+          "Cannot instantiate " + desc.className);
+        acex.detail = e;
+        throw acex;
+      }
+
+    currentGroupId = id;
+    try
+      {
+        group.monitor = getSystem().activeGroup(id, group, incarnation);
+        return group;
+      }
+    catch (RemoteException e)
+      {
+        ActivationException acex = new ActivationException("createGroup");
+        acex.detail = e;
+        throw acex;
+      }
+  }
+
+  /**
+   * Get the id of current activation group.
+   *
+   * @return the id of the current activation group or null if none exists.
+   */
+  public static ActivationGroupID currentGroupID()
+  {
+    try
+      {
+        if (currentGroupId==null)
+          {
+            // This will also assing the currentGroupId to the current
+            // (default) group of the default system.
+            setSystem(DefaultActivationSystem.get());
+          }
+      }
+    catch (ActivationException e)
+      {
+        InternalError ierr = new InternalError("Unable to activate AS");
+        ierr.initCause(e);
+        throw ierr;
+      }
+
+    return currentGroupId;
+  }
+
+  /**
+   * Set the activation system for this virtual machine. The system can only
+   * be set if no group is active.
+   *
+   * @param aSystem the system to set
+   *
+   * @throws ActivationException if some group is active now.
+   */
+  public static void setSystem(ActivationSystem aSystem)
+      throws ActivationException
+  {
+    if (currentGroupId!=null)
+      throw new ActivationException("Group active");
+    else
+      {
+        try
+          {
+            // Register the default transient activation system and group.
+            system = aSystem;
+            ActivationGroupDesc def = new ActivationGroupDesc(
+               DefaultActivationGroup.class.getName(),
+              "",
+              null,
+              null,
+              null);
+            currentGroupId = system.registerGroup(def);
+          }
+        catch (Exception ex)
+        {
+          InternalError ierr = new InternalError("Unable to start default AG");
+          ierr.initCause(ex);
+          throw ierr;
+        }
+      }
+  }
+
+  /**
+   * Get the current activation system. If the system is not set via
+   * {@link #setSystem} method, the default system for this virtual machine is
+   * returned. The default system is first searched by name
+   * "java.rmi.activation.ActivationSystem" on the activation registry port. The
+   * default value of the activation registry port is
+   * {@link ActivationSystem#SYSTEM_PORT}, but it can be changed by putting the
+   * system property java.rmi.activation.port. Both activation system and
+   * activation registry are provided by the RMI daemon tool, RMID, if it is
+   * running on the local host. If the RMID is not running, the internal
+   * transient activation system will be created and returned. This internal
+   * system is highly limited in in capabilities and is not intended to be used
+   * anywhere apart automated testing.
+   *
+   * @return the activation system for this virtual machine
+   * @throws ActivationException
+   */
+  public static ActivationSystem getSystem() throws ActivationException
+  {
+    if (system == null)
+      system = DefaultActivationSystem.get();
+    return system;
+  }
+
+  /**
+   * Makes the call back to the groups {@link ActivationMonitor}.
+   *
+   * @param id the id obj the object being activated
+   * @param mObject the marshalled object, contains the activated remote object
+   *          stub.
+   * @throws ActivationException on activation error
+   * @throws UnknownObjectException if such object is not registered
+   * @throws RemoteException on remote call (to monitor) error
+   */
+  protected void activeObject(ActivationID id,
+                              MarshalledObject<? extends Remote> mObject)
+      throws ActivationException, UnknownObjectException, RemoteException
+  {
+    if (monitor!=null)
+      monitor.activeObject(id, mObject);
+
+    id.group = this;
+  }
+
+  /**
+   * Makes the call back to the groups {@link ActivationMonitor} and sets
+   * the current group to null.
+   */
+  protected void inactiveGroup() throws UnknownGroupException, RemoteException
+  {
+    if (monitor!=null)
+      monitor.inactiveGroup(groupId, incarnation);
+
+    if (currentGroupId!=null && currentGroupId.equals(groupId))
+      currentGroupId = null;
+  }
+
+}