[jboss-svn-commits] JBoss Common SVN: r3192 - jboss-logmanager/trunk/src/main/java/org/jboss/logmanager.

[jboss-svn-commits at lists.jboss.org]

Author: david.lloyd at jboss.com
Date: 2009-05-20 18:18:24 -0400 (Wed, 20 May 2009)
New Revision: 3192

Added:
   jboss-logmanager/trunk/src/main/java/org/jboss/logmanager/LogService.java
Log:
Add log service class for bootstrap log handling

Added: jboss-logmanager/trunk/src/main/java/org/jboss/logmanager/LogService.java
===================================================================
--- jboss-logmanager/trunk/src/main/java/org/jboss/logmanager/LogService.java	                        (rev 0)
+++ jboss-logmanager/trunk/src/main/java/org/jboss/logmanager/LogService.java	2009-05-20 22:18:24 UTC (rev 3192)
@@ -0,0 +1,98 @@
+/*
+ * JBoss, Home of Professional Open Source.
+ * Copyright 2009, Red Hat Middleware LLC, and individual contributors
+ * as indicated by the @author tags. See the copyright.txt file in the
+ * distribution for a full listing of individual contributors.
+ *
+ * This is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This software 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this software; if not, write to the Free
+ * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
+ */
+
+package org.jboss.logmanager;
+
+import java.util.logging.Handler;
+
+/**
+ * A simple log service which can be used to remove any bootstrap handlers when a real handler is configured.
+ */
+public final class LogService {
+
+    private static final Logger log = Logger.getLogger("org.jboss.logging.service");
+    private static final Logger rootLogger = Logger.getLogger("");
+
+    private Handler[] bootstrapHandlers;
+
+    /**
+     * Create lifecycle method.
+     */
+    public void create() {
+    }
+
+    /**
+     * Start method; removes and saves bootstrap handlers.
+     */
+    public void start() {
+        log.info("Removing bootstrap log handlers");
+        final Handler[] bootstrapHandlers = rootLogger.clearHandlers();
+        this.bootstrapHandlers = bootstrapHandlers;
+        for (Handler handler : bootstrapHandlers) {
+            safeFlush(handler);
+        }
+        // this message probably won't appear anywhere...
+        log.info("Removed bootstrap log handlers");
+    }
+
+    /**
+     * Stop method; removes root handlers and restores the bootstrap handlers.
+     */
+    public void stop() {
+        // this message probably won't appear anywhere...
+        log.info("Restoring bootstrap log handlers");
+        // clear any remaining handlers from the root (there shouldn't be any, but...)
+        for (Handler handler : rootLogger.clearHandlers()) {
+            safeClose(handler);
+        }
+        final Handler[] bootstrapHandlers = this.bootstrapHandlers;
+        this.bootstrapHandlers = null;
+        for (Handler handler : bootstrapHandlers) {
+            rootLogger.addHandler(handler);
+        }
+        log.info("Restored bootstrap log handlers");
+    }
+
+    private static void safeFlush(Handler handler) {
+        try {
+            if (handler != null) handler.flush();
+        } catch (Throwable t) {
+            // todo - might this loop somehow?
+            log.error("Error flushing a log handler", t);
+        }
+    }
+
+    private static void safeClose(Handler handler) {
+        try {
+            if (handler != null) handler.close();
+        } catch (Throwable t) {
+            // todo - might this loop somehow?
+            log.error("Error closing a log handler", t);
+        }
+    }
+
+    /**
+     * Destroy lifecycle method.
+     */
+    public void destroy() {
+    }
+}
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