--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/com/go/trove/log/Syslog.java	Sat Mar 21 11:00:06 2009 +0000
@@ -0,0 +1,250 @@
+/* ====================================================================
+ * Trove - Copyright (c) 1997-2000 Walt Disney Internet Group
+ * ====================================================================
+ * The Tea Software License, Version 1.1
+ *
+ * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The end-user documentation included with the redistribution,
+ *    if any, must include the following acknowledgment:
+ *       "This product includes software developed by the
+ *        Walt Disney Internet Group (http://opensource.go.com/)."
+ *    Alternately, this acknowledgment may appear in the software itself,
+ *    if and wherever such third-party acknowledgments normally appear.
+ *
+ * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must
+ *    not be used to endorse or promote products derived from this
+ *    software without prior written permission. For written
+ *    permission, please contact opensource@dig.com.
+ *
+ * 5. Products derived from this software may not be called "Tea",
+ *    "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet",
+ *    "Kettle", "Trove" or "BeanDoc" appear in their name, without prior
+ *    written permission of the Walt Disney Internet Group.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE WALT DISNEY INTERNET GROUP OR ITS
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * For more information about Tea, please see http://opensource.go.com/.
+ */
+
+package com.go.trove.log;
+
+import java.io.*;
+
+/******************************************************************************
+ * Contains references to a static Log instance that can be used for general
+ * system-wide logging. By default, log messages are written to System.out
+ * or System.err. When "installed", all output provided to System.out
+ * and System.err is redirected into the system log.
+ *
+ * @author Brian S O'Neill
+ * @version
+ * <!--$$Revision: 1.1 $-->, <!--$$JustDate:-->  9/07/00 <!-- $-->
+ * @see Log
+ */
+public class Syslog {
+    private static final Log cLog;
+    private static final LogListener cSystemLogEventPrinter;
+
+    private static LogEventParsingOutputStream cSystemOut;
+    private static LogEventParsingOutputStream cSystemErr;
+
+    private static PrintStream cOriginalOut;
+    private static PrintStream cOriginalErr;
+    private static boolean cInstalled;
+
+    static {
+        cLog = new Log(null, null);
+        cLog.setDescription("System Log");
+
+        cSystemLogEventPrinter = new LogListener() {
+            public void logMessage(LogEvent e) {
+                PrintStream ps = getPrintStream(e);
+                String message = e.getMessage();
+                if (message == null) {
+                    ps.println();
+                }
+                else {
+                    ps.println(message);
+                }
+            }
+            
+            public void logException(LogEvent e) {
+                Throwable t = e.getException();
+                if (t == null) {
+                    logMessage(e);
+                }
+                else {
+                    t.printStackTrace(getPrintStream(e));
+                }
+            }
+                
+            private PrintStream getPrintStream(LogEvent e) {
+                synchronized (log()) {
+                    switch (e.getType()) {
+                        case LogEvent.DEBUG_TYPE:
+                        case LogEvent.INFO_TYPE:
+                        return (cInstalled) ? cOriginalOut : System.out;
+                    }
+                    
+                    return (cInstalled) ? cOriginalErr : System.err;
+                }
+            }
+        };
+        
+        log().addLogListener(cSystemLogEventPrinter);
+    }
+
+    /** 
+     * Returns the system Log instance that, by default, only has one
+     * LogListener. It prints debug and info LogEvent messages to System.out
+     * and other LogEvent messages to System.err.
+     *
+     * @see #getSystemLogEventPrinter()
+     */
+    public static Log log() {
+        return cLog;
+    }
+
+    /** 
+     * Returns a simple LogListener that prints debug and info LogEvent
+     * messages to System.out and other LogEvent messages to System.err.
+     * Remove this listener to disable printing to System.out and System.err.
+     */
+    public static LogListener getSystemLogEventPrinter() {
+        return cSystemLogEventPrinter;
+    }
+
+    /**
+     * When installed, System.out and System.err are redirected to Syslog.log.
+     * System.out produces info events, and System.err produces error events.
+     */ 
+    public static void install() {
+        synchronized (log()) {
+            if (!cInstalled) {
+                cInstalled = true;
+                cOriginalOut = System.out;
+                cOriginalErr = System.err;
+                
+                cSystemOut = new LogEventParsingOutputStream
+                    (log(), LogEvent.INFO_TYPE) 
+                {
+                    public boolean isEnabled() {
+                        return log().isInfoEnabled();
+                    }
+                };
+                cSystemOut.addLogListener(log());
+                System.setOut(new PrintStream(cSystemOut, true));
+
+                cSystemErr = new LogEventParsingOutputStream
+                    (log(), LogEvent.ERROR_TYPE) 
+                {
+                    public boolean isEnabled() {
+                        return log().isErrorEnabled();
+                    }
+                };
+                cSystemErr.addLogListener(log());
+                System.setErr(new PrintStream(cSystemErr, true));
+            }
+        }
+    }
+
+    /**
+     * Uninstalls by restoring System.out and System.err.
+     */
+    public static void uninstall() {
+        synchronized (log()) {
+            if (cInstalled) {
+                cInstalled = false;
+                System.setOut(cOriginalOut);
+                System.setErr(cOriginalErr);
+                cOriginalOut = null;
+                cOriginalErr = null;
+                cSystemOut = null;
+                cSystemErr = null;
+            }
+        }
+    }
+
+    /**
+     * Shortcut to {@link Log#debug(String) Syslog.log().debug(String)}.
+     */
+    public static void debug(String s) {
+        log().debug(s);
+    }
+
+    /**
+     * Shortcut to {@link Log#debug(Throwable) Syslog.log().debug(Throwable)}.
+     */
+    public static void debug(Throwable t) {
+        log().debug(t);
+    }
+
+    /**
+     * Shortcut to {@link Log#info(String) Syslog.log().info(String)}.
+     */
+    public static void info(String s) {
+        log().info(s);
+    }
+
+    /**
+     * Shortcut to {@link Log#info(Throwable) Syslog.log().info(Throwable)}.
+     */
+    public static void info(Throwable t) {
+        log().info(t);
+    }
+
+    /**
+     * Shortcut to {@link Log#warn(String) Syslog.log().warn(String)}.
+     */
+    public static void warn(String s) {
+        log().warn(s);
+    }
+
+    /**
+     * Shortcut to {@link Log#warn(Throwable) Syslog.log().warn(Throwable)}.
+     */
+    public static void warn(Throwable t) {
+        log().warn(t);
+    }
+
+    /**
+     * Shortcut to {@link Log#error(String) Syslog.log().error(String)}.
+     */
+    public static void error(String s) {
+        log().error(s);
+    }
+
+    /**
+     * Shortcut to {@link Log#error(Throwable) Syslog.log().error(Throwable)}.
+     */
+    public static void error(Throwable t) {
+        log().error(t);
+    }
+
+    private Syslog() {
+    }
+}