Initial revision

From-SVN: r104578
2005-09-23 19:36:46 +00:00
parent acff2da93c
commit 9b044d1951
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+/* gnuPoaCurrent.java --
+   Copyright (C) 2005 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.CORBA.Poa;
+
+import org.omg.CORBA.CurrentHelper;
+import org.omg.CORBA.portable.ObjectImpl;
+import org.omg.PortableServer.Current;
+import org.omg.PortableServer.CurrentOperations;
+import org.omg.PortableServer.CurrentPackage.NoContext;
+import org.omg.PortableServer.POA;
+
+import java.util.Iterator;
+import java.util.Map;
+import java.util.TreeMap;
+
+/**
+ * Supports the "Poa current" concept, providing the id and poa of
+ * the object currently being served. There is only one instance
+ * of this class per ORB. It maintains a thread to information map.
+ *
+ * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
+ */
+public class gnuPoaCurrent
+  extends ObjectImpl
+  implements Current
+{
+  /**
+   * The table, mapping threads to records.
+   */
+  private TreeMap threads = new TreeMap();
+
+  /**
+   * Get the array of POA current repository ids.
+   *
+   * @return a single member array, containing value, returned
+   * by the {@link CurrentHelper#id}, normally
+   * "IDL:omg.org/PortableServer/Current:2.3".
+   */
+  public String[] _ids()
+  {
+    return new String[] { CurrentHelper.id() };
+  }
+
+  /**
+   * Get the object id, associated with the thread currently being served.
+   *
+   * @throws NoContext if the current thread is not associated with any
+   * object.
+   */
+  public byte[] get_object_id()
+                       throws NoContext
+  {
+    CurrentOperations r;
+    synchronized (threads)
+      {
+        r = (CurrentOperations) threads.get(Thread.currentThread().getName());
+      }
+    if (r != null)
+      return r.get_object_id();
+    else
+      throw new NoContext(Thread.currentThread().getName());
+  }
+
+  /**
+   * Get the object POA, associated with the thread currently being served.
+   *
+   * @throws NoContext if the current thread is not associated with any
+   * object.
+   */
+  public POA get_POA()
+              throws NoContext
+  {
+    CurrentOperations r;
+    synchronized (threads)
+      {
+        r = (CurrentOperations) threads.get(Thread.currentThread().getName());
+      }
+    if (r != null)
+      return r.get_POA();
+    else
+      throw new NoContext(Thread.currentThread().getName());
+  }
+
+  /**
+   * Add the entry to the map.
+   */
+  public void put(Thread t, CurrentOperations record)
+  {
+    synchronized (threads)
+      {
+        threads.put(t.getName(), record);
+      }
+  }
+
+  /**
+   * Check if this Poa has some running threads.
+   */
+  public boolean has(POA poa)
+  {
+    synchronized (threads)
+      {
+        Iterator iter = threads.entrySet().iterator();
+        while (iter.hasNext())
+          {
+            Map.Entry item = (Map.Entry) iter.next();
+            try
+              {
+                if (((CurrentOperations) item.getValue()).get_POA() == poa)
+                  {
+                    return true;
+                  }
+              }
+            catch (NoContext ex)
+              {
+                throw new InternalError();
+              }
+          }
+      }
+    return false;
+  }
+
+  /**
+   * Check if this thread is registered.
+   */
+  public boolean has(Thread t)
+  {
+    synchronized (threads)
+      {
+        return threads.containsKey(t.getName());
+      }
+  }
+
+  /**
+   * Remove the entry from the map.
+   */
+  public void remove(Thread t)
+  {
+    synchronized (threads)
+      {
+        threads.remove(t.getName());
+      }
+  }
+}