Initial revision

From-SVN: r104578
2005-09-23 19:36:46 +00:00
parent acff2da93c
commit 9b044d1951
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+/* ThreadPolicyValue.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 org.omg.PortableServer;
+
+import org.omg.CORBA.BAD_OPERATION;
+import org.omg.CORBA.portable.IDLEntity;
+
+import java.io.Serializable;
+
+/**
+ * Defines the possible values for the POA thread policy.
+ *
+ * This enumeration can obtain the following values:
+ * <ul>
+ * <li>ORB_CTRL_MODEL Each object in POA has a separate serving thread
+ * and a separate server socket, listening on the objects individual
+ * port. Additionally, when the request is accepted, it is also
+ * served in a separate thread, so several requests to the same
+ * object can be processed in parallel. The servant can always get
+ * the Id and POA of the object it is currently serving by
+ * invoking {@link Servant#_object_id()} and {@link Servant#_poa}.
+ * These two methods use thread to data map and must work correctly
+ * even then the servant code is executed in several parallel threads.
+ * </li>
+ * <li>SINGLE_THREAD_MODEL All objects in POA share the same server
+ * socket and are served in the same thread. This model is applicable
+ * when the number of objects is greater than the number of threads
+ * and (or) ports, supported by the system.</li>
+ * </ul>
+ * OMG also defines a MAIN_THREAD_MODEL, currently not supported by
+ * the java API.
+ *
+ * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
+ */
+public class ThreadPolicyValue
+  implements Serializable, IDLEntity
+{
+  /**
+   * Use serialVersionUID (v1.4) for interoperability.
+   */
+  private static final long serialVersionUID = -8874988828297141512L;
+
+  /**
+   * The value field for the current instance.
+   */
+  private final int _value;
+
+  /**
+  * The possible value of this enumeration (ORB_CTRL_MODEL).
+  */
+  public static final int _ORB_CTRL_MODEL = 0;
+
+  /**
+   * An instance of ThreadPolicyValue, initialized to ORB_CTRL_MODEL.
+   */
+  public static final ThreadPolicyValue ORB_CTRL_MODEL =
+    new ThreadPolicyValue(_ORB_CTRL_MODEL);
+
+  /**
+  * The possible value of this enumeration (SINGLE_THREAD_MODEL).
+  */
+  public static final int _SINGLE_THREAD_MODEL = 1;
+
+  /**
+   * An instance of ThreadPolicyValue, initialized to SINGLE_THREAD_MODEL.
+   */
+  public static final ThreadPolicyValue SINGLE_THREAD_MODEL =
+    new ThreadPolicyValue(_SINGLE_THREAD_MODEL);
+
+  /**
+   * The private array that maps integer codes to the enumeration
+   * values.
+   */
+  private static final ThreadPolicyValue[] enume =
+    new ThreadPolicyValue[] { ORB_CTRL_MODEL, SINGLE_THREAD_MODEL };
+
+  /**
+   * The private array of state names.
+   */
+  private static final String[] state_names =
+    new String[] { "ORB_CTRL_MODEL", "SINGLE_THREAD_MODEL" };
+
+  /**
+   * Normally, no new instances are required, so the constructor is protected.
+   */
+  protected ThreadPolicyValue(int a_value)
+  {
+    _value = a_value;
+  }
+
+  /**
+   * Returns the ThreadPolicyValue, matching the given integer constant.
+   *
+   * @param code one of _ORB_CTRL_MODEL, _SINGLE_THREAD_MODEL.
+   * @return one of ORB_CTRL_MODEL, SINGLE_THREAD_MODEL.
+   * @throws BAD_PARAM if the parameter is not one of the valid values.
+   */
+  public static ThreadPolicyValue from_int(int code)
+  {
+    try
+      {
+        return enume [ code ];
+      }
+    catch (ArrayIndexOutOfBoundsException ex)
+      {
+        throw new BAD_OPERATION("Invalid enumeration code " + code);
+      }
+  }
+
+  /**
+   * Returns a short string representation.
+   * @return the name of the current enumeration value.
+   */
+  public String toString()
+  {
+    return state_names [ _value ];
+  }
+
+  /**
+   * Returns the integer code of the enumeration value.
+   * @return one of ORB_CTRL_MODEL, SINGLE_THREAD_MODEL.
+   */
+  public int value()
+  {
+    return _value;
+  }
+}