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@@ -0,0 +1,72 @@
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+/**
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+ * Licensed to the Apache Software Foundation (ASF) under one
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+ * or more contributor license agreements. See the NOTICE file
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+ * distributed with this work for additional information
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+ * regarding copyright ownership. The ASF licenses this file
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+ * to you under the Apache License, Version 2.0 (the
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+ * "License"); you may not use this file except in compliance
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+ * with the License. You may obtain a copy of the License at
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+ *
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+ * http://www.apache.org/licenses/LICENSE-2.0
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+ *
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+ * Unless required by applicable law or agreed to in writing, software
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+ * distributed under the License is distributed on an "AS IS" BASIS,
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+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+ * See the License for the specific language governing permissions and
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+ * limitations under the License.
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+ */
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+
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+package org.apache.zookeeper.server;
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+
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+import java.lang.management.ManagementFactory;
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+import java.util.Enumeration;
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+
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+import javax.management.JMException;
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+import javax.management.MBeanServer;
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+import javax.management.ObjectName;
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+
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+import org.apache.log4j.LogManager;
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+import org.apache.log4j.Logger;
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+import org.apache.log4j.jmx.HierarchyDynamicMBean;
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+import org.apache.log4j.spi.LoggerRepository;
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+
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+/**
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+ * Shared utilities
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+ */
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+public class ManagedUtil {
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+ /**
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+ * Register the log4j JMX mbeans. Set environment variable
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+ * "zookeeper.jmx.log4j.disable" to true to disable registration.
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+ * @see http://logging.apache.org/log4j/1.2/apidocs/index.html?org/apache/log4j/jmx/package-summary.html
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+ * @throws JMException if registration fails
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+ */
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+ public static void registerLog4jMBeans() throws JMException {
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+ if (Boolean.getBoolean("zookeeper.jmx.log4j.disable") == true) {
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+ return;
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+ }
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+
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+ MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
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+
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+ // Create and Register the top level Log4J MBean
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+ HierarchyDynamicMBean hdm = new HierarchyDynamicMBean();
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+
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+ ObjectName mbo = new ObjectName("log4j:hiearchy=default");
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+ mbs.registerMBean(hdm, mbo);
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+
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+ // Add the root logger to the Hierarchy MBean
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+ Logger rootLogger = Logger.getRootLogger();
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+ hdm.addLoggerMBean(rootLogger.getName());
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+
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+ // Get each logger from the Log4J Repository and add it to
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+ // the Hierarchy MBean created above.
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+ LoggerRepository r = LogManager.getLoggerRepository();
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+ Enumeration enumer = r.getCurrentLoggers();
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+ Logger logger = null;
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+
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+ while (enumer.hasMoreElements()) {
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+ logger = (Logger) enumer.nextElement();
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+ hdm.addLoggerMBean(logger.getName());
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+ }
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+ }
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+
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+}
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Mahadev Konar