/*
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* The contents of this file are subject to the terms of the Common Development and
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* Distribution License (the License). You may not use this file except in compliance with the
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* License.
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*
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* You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
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* specific language governing permission and limitations under the License.
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*
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* When distributing Covered Software, include this CDDL Header Notice in each file and include
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* the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
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* Header, with the fields enclosed by brackets [] replaced by your own identifying
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* information: "Portions Copyright [year] [name of copyright owner]".
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*
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* Copyright 2006-2008 Sun Microsystems, Inc.
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* Portions Copyright 2014-2016 ForgeRock AS.
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*/
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package org.opends.server.extensions;
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import static org.opends.messages.ConfigMessages.*;
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import static org.opends.messages.ExtensionMessages.*;
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import static org.opends.server.util.ServerConstants.*;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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import java.util.concurrent.atomic.AtomicLong;
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import javax.management.Attribute;
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import javax.management.AttributeList;
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import javax.management.AttributeNotFoundException;
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import javax.management.DynamicMBean;
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import javax.management.InvalidAttributeValueException;
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import javax.management.MBeanAttributeInfo;
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import javax.management.MBeanConstructorInfo;
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import javax.management.MBeanException;
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import javax.management.MBeanInfo;
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import javax.management.MBeanNotificationInfo;
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import javax.management.MBeanOperationInfo;
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import javax.management.MBeanServer;
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import javax.management.Notification;
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import javax.management.NotificationBroadcasterSupport;
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import javax.management.ObjectName;
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import org.forgerock.i18n.LocalizableMessage;
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import org.forgerock.i18n.slf4j.LocalizedLogger;
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import org.forgerock.opendj.config.server.ConfigChangeResult;
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import org.forgerock.opendj.config.server.ConfigException;
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import org.forgerock.opendj.config.server.ConfigurationChangeListener;
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import org.forgerock.opendj.ldap.DN;
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import org.forgerock.opendj.server.config.server.AlertHandlerCfg;
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import org.forgerock.opendj.server.config.server.JMXAlertHandlerCfg;
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import org.opends.server.api.AlertGenerator;
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import org.opends.server.api.AlertHandler;
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import org.opends.server.api.DirectoryServerMBean;
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import org.opends.server.config.JMXMBean;
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import org.opends.server.core.DirectoryServer;
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import org.opends.server.types.InitializationException;
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/**
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* This class provides an implementation of a Directory Server alert handler
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* that will send alerts using JMX notifications.
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*/
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public class JMXAlertHandler
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extends NotificationBroadcasterSupport
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implements AlertHandler<JMXAlertHandlerCfg>,
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ConfigurationChangeListener<JMXAlertHandlerCfg>, DynamicMBean,
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DirectoryServerMBean
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{
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private static final LocalizedLogger logger = LocalizedLogger.getLoggerForThisClass();
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/** The fully-qualified name of this class. */
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private static final String CLASS_NAME =
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"org.opends.server.extensions.JMXAlertHandler";
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/** The current configuration for this alert handler. */
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private AlertHandlerCfg currentConfig;
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/** The sequence number generator used for this alert handler. */
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private AtomicLong sequenceNumber;
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/** The DN of the configuration entry with which this alert handler is associated. */
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private DN configEntryDN;
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/** The JMX object name used for this JMX alert handler. */
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private ObjectName objectName;
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/**
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* Creates a new instance of this JMX alert handler. No initialization should
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* be done here, as it should all be performed in the
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* <CODE>initializeAlertHandler</CODE> method.
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*/
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public JMXAlertHandler()
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{
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super();
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}
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@Override
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public void initializeAlertHandler(JMXAlertHandlerCfg configuration)
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throws ConfigException, InitializationException
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{
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sequenceNumber = new AtomicLong(1);
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if (configuration == null)
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{
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configEntryDN = null;
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}
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else
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{
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configEntryDN = configuration.dn();
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}
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MBeanServer mBeanServer = DirectoryServer.getJMXMBeanServer();
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if (mBeanServer != null)
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{
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try
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{
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String nameStr = MBEAN_BASE_DOMAIN + ":type=JMXAlertHandler";
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objectName = new ObjectName(nameStr);
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if (mBeanServer.isRegistered(objectName))
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{
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mBeanServer.unregisterMBean(objectName);
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}
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mBeanServer.registerMBean(this, objectName);
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}
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catch (Exception e)
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{
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logger.traceException(e);
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LocalizableMessage message = ERR_JMX_ALERT_HANDLER_CANNOT_REGISTER.get(e);
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throw new InitializationException(message, e);
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}
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}
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if (configuration != null)
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{
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configuration.addJMXChangeListener(this);
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currentConfig = configuration;
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}
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}
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@Override
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public AlertHandlerCfg getAlertHandlerConfiguration()
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{
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return currentConfig;
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}
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@Override
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public boolean isConfigurationAcceptable(AlertHandlerCfg configuration,
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List<LocalizableMessage> unacceptableReasons)
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{
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JMXAlertHandlerCfg cfg = (JMXAlertHandlerCfg) configuration;
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return isConfigurationChangeAcceptable(cfg, unacceptableReasons);
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}
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@Override
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public void finalizeAlertHandler()
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{
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// No action is required.
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}
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/**
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* Retrieves the JMX object name for this JMX alert handler.
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*
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* @return The JMX object name for this JMX alert handler.
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*/
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@Override
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public ObjectName getObjectName()
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{
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return objectName;
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}
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@Override
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public void sendAlertNotification(AlertGenerator generator, String alertType,
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LocalizableMessage alertMessage)
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{
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sendNotification(new Notification(alertType, generator.getClassName(),
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sequenceNumber.getAndIncrement(),
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System.currentTimeMillis(),
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alertMessage.toString()));
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}
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/**
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* Retrieves information about the types of JMX notifications that may be
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* generated.
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*
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* @return Information about the types of JMX notifications that may be
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* generated.
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*/
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@Override
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public MBeanNotificationInfo[] getNotificationInfo()
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{
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List<MBeanNotificationInfo> notifications = new ArrayList<>();
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for (JMXMBean mBean : DirectoryServer.getJMXMBeans())
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{
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MBeanInfo mBeanInfo = mBean.getMBeanInfo();
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Collections.addAll(notifications, mBeanInfo.getNotifications());
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}
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return notifications.toArray(new MBeanNotificationInfo[notifications.size()]);
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}
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/**
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* Obtain the value of a specific attribute of the Dynamic MBean.
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*
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* @param attribute The name of the attribute to be retrieved.
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*
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* @return The requested MBean attribute.
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*
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* @throws AttributeNotFoundException If the specified attribute is not
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* associated with this MBean.
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*/
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@Override
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public Attribute getAttribute(String attribute)
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throws AttributeNotFoundException
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{
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// There are no attributes for this MBean.
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LocalizableMessage message = ERR_CONFIG_JMX_ATTR_NO_ATTR.get(configEntryDN, attribute);
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throw new AttributeNotFoundException(message.toString());
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}
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/**
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* Set the value of a specific attribute of the Dynamic MBean.
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*
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* @param attribute The identification of the attribute to be set and the
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* value it is to be set to.
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*
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* @throws AttributeNotFoundException If the specified attribute is not
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* associated with this MBean.
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*
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* @throws InvalidAttributeValueException If the provided value is not
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* acceptable for this MBean.
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*/
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@Override
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public void setAttribute(Attribute attribute)
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throws AttributeNotFoundException, InvalidAttributeValueException
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{
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// There are no attributes for this MBean.
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LocalizableMessage message = ERR_CONFIG_JMX_ATTR_NO_ATTR.get(configEntryDN, attribute);
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throw new AttributeNotFoundException(message.toString());
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}
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/**
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* Get the values of several attributes of the Dynamic MBean.
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*
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* @param attributes A list of the attributes to be retrieved.
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*
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* @return The list of attributes retrieved.
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*/
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@Override
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public AttributeList getAttributes(String[] attributes)
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{
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// There are no attributes for this MBean.
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return new AttributeList();
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}
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/**
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* Sets the values of several attributes of the Dynamic MBean.
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*
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* @param attributes A list of attributes: The identification of the
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* attributes to be set and the values they are to be set
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* to.
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*
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* @return The list of attributes that were set with their new values.
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*/
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@Override
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public AttributeList setAttributes(AttributeList attributes)
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{
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// There are no attributes for this MBean.
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return new AttributeList();
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}
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/**
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* Allows an action to be invoked on the Dynamic MBean.
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*
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* @param actionName The name of the action to be invoked.
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* @param params An array containing the parameters to be set when the
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* action is invoked.
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* @param signature An array containing the signature of the action. The
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* class objects will be loaded through the same class
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* loader as the one used for loading the MBean on which
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* action is invoked.
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*
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* @return The object returned by the action, which represents the result of
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* invoking the action on the MBean specified.
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*
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* @throws MBeanException If a problem is encountered while invoking the
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* method.
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*/
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@Override
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public Object invoke(String actionName, Object[] params, String[] signature)
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throws MBeanException
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{
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// There are no invokable components for this MBean.
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StringBuilder buffer = new StringBuilder();
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buffer.append(actionName);
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buffer.append("(");
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if (signature.length > 0)
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{
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buffer.append(signature[0]);
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for (int i=1; i < signature.length; i++)
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{
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buffer.append(", ");
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buffer.append(signature[i]);
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}
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}
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buffer.append(")");
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LocalizableMessage message = ERR_CONFIG_JMX_NO_METHOD.get(buffer, configEntryDN);
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throw new MBeanException(new ConfigException(message));
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}
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/**
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* Provides the exposed attributes and actions of the Dynamic MBean using an
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* MBeanInfo object.
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*
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* @return An instance of <CODE>MBeanInfo</CODE> allowing all attributes and
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* actions exposed by this Dynamic MBean to be retrieved.
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*/
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@Override
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public MBeanInfo getMBeanInfo()
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{
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return new MBeanInfo(CLASS_NAME, "JMX Alert Handler",
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new MBeanAttributeInfo[0], new MBeanConstructorInfo[0],
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new MBeanOperationInfo[0], getNotificationInfo());
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}
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@Override
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public boolean isConfigurationChangeAcceptable(
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JMXAlertHandlerCfg configuration,
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List<LocalizableMessage> unacceptableReasons)
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{
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return true;
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}
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@Override
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public ConfigChangeResult applyConfigurationChange(
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JMXAlertHandlerCfg configuration)
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{
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currentConfig = configuration;
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return new ConfigChangeResult();
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}
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}
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