001 /*
002 * Copyright 1996-2002 Sun Microsystems, Inc. All Rights Reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation. Sun designates this
008 * particular file as subject to the "Classpath" exception as provided
009 * by Sun in the LICENSE file that accompanied this code.
010 *
011 * This code is distributed in the hope that it will be useful, but WITHOUT
012 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
013 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
014 * version 2 for more details (a copy is included in the LICENSE file that
015 * accompanied this code).
016 *
017 * You should have received a copy of the GNU General Public License version
018 * 2 along with this work; if not, write to the Free Software Foundation,
019 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
020 *
021 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
022 * CA 95054 USA or visit www.sun.com if you need additional information or
023 * have any questions.
024 */
025 package java.rmi.server;
026
027 import java.rmi.*;
028 import sun.rmi.server.UnicastServerRef;
029 import sun.rmi.runtime.Log;
030
031 /**
032 * The <code>RemoteServer</code> class is the common superclass to server
033 * implementations and provides the framework to support a wide range
034 * of remote reference semantics. Specifically, the functions needed
035 * to create and export remote objects (i.e. to make them remotely
036 * available) are provided abstractly by <code>RemoteServer</code> and
037 * concretely by its subclass(es).
038 *
039 * @version 1.39, 05/05/07
040 * @author Ann Wollrath
041 * @since JDK1.1
042 */
043 public abstract class RemoteServer extends RemoteObject {
044 /* indicate compatibility with JDK 1.1.x version of class */
045 private static final long serialVersionUID = -4100238210092549637L;
046
047 /**
048 * Constructs a <code>RemoteServer</code>.
049 * @since JDK1.1
050 */
051 protected RemoteServer() {
052 super ();
053 }
054
055 /**
056 * Constructs a <code>RemoteServer</code> with the given reference type.
057 *
058 * @param ref the remote reference
059 * @since JDK1.1
060 */
061 protected RemoteServer(RemoteRef ref) {
062 super (ref);
063 }
064
065 /**
066 * Returns a string representation of the client host for the
067 * remote method invocation being processed in the current thread.
068 *
069 * @return a string representation of the client host
070 *
071 * @throws ServerNotActiveException if no remote method invocation
072 * is being processed in the current thread
073 *
074 * @since JDK1.1
075 */
076 public static String getClientHost()
077 throws ServerNotActiveException {
078 return sun.rmi.transport.tcp.TCPTransport.getClientHost();
079 }
080
081 /**
082 * Log RMI calls to the output stream <code>out</code>. If
083 * <code>out</code> is <code>null</code>, call logging is turned off.
084 *
085 * <p>If there is a security manager, its
086 * <code>checkPermission</code> method will be invoked with a
087 * <code>java.util.logging.LoggingPermission("control")</code>
088 * permission; this could result in a <code>SecurityException</code>.
089 *
090 * @param out the output stream to which RMI calls should be logged
091 * @throws SecurityException if there is a security manager and
092 * the invocation of its <code>checkPermission</code> method
093 * fails
094 * @see #getLog
095 * @since JDK1.1
096 */
097 public static void setLog(java.io.OutputStream out) {
098 logNull = (out == null);
099 UnicastServerRef.callLog.setOutputStream(out);
100 }
101
102 /**
103 * Returns stream for the RMI call log.
104 * @return the call log
105 * @see #setLog
106 * @since JDK1.1
107 */
108 public static java.io.PrintStream getLog() {
109 return (logNull ? null : UnicastServerRef.callLog
110 .getPrintStream());
111 }
112
113 // initialize log status
114 private static boolean logNull = !UnicastServerRef.logCalls;
115 }
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