/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Portions Copyright 2006-2007 Sun Microsystems, Inc.
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*/
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package org.opends.server.core;
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import static org.opends.server.loggers.debug.DebugLogger.*;
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import org.opends.server.loggers.debug.DebugTracer;
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import static org.opends.server.messages.ConfigMessages.*;
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import static org.opends.server.messages.CoreMessages.*;
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import static org.opends.server.messages.MessageHandler.getMessage;
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import static org.opends.server.util.StaticUtils.stackTraceToSingleLineString;
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import java.lang.reflect.Method;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.concurrent.ConcurrentHashMap;
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import org.opends.server.admin.ClassPropertyDefinition;
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import org.opends.server.admin.server.ConfigurationAddListener;
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import org.opends.server.admin.server.ConfigurationChangeListener;
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import org.opends.server.admin.server.ConfigurationDeleteListener;
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import org.opends.server.admin.server.ServerManagementContext;
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import org.opends.server.admin.std.meta.*;
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import org.opends.server.admin.std.server.ConnectionHandlerCfg;
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import org.opends.server.admin.std.server.RootCfg;
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import org.opends.server.api.ConnectionHandler;
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import org.opends.server.config.ConfigException;
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import org.opends.server.types.ConfigChangeResult;
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import org.opends.server.types.DN;
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import org.opends.server.types.DebugLogLevel;
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import org.opends.server.types.InitializationException;
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import org.opends.server.types.ResultCode;
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/**
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* This class defines a utility that will be used to manage the
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* configuration for the set of connection handlers defined in the
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* Directory Server. It will perform the necessary initialization of
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* those connection handlers when the server is first started, and
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* then will manage any changes to them while the server is running.
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*/
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public class ConnectionHandlerConfigManager implements
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ConfigurationAddListener<ConnectionHandlerCfg>,
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ConfigurationDeleteListener<ConnectionHandlerCfg>,
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ConfigurationChangeListener<ConnectionHandlerCfg> {
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/**
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* The tracer object for the debug logger.
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*/
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private static final DebugTracer TRACER = getTracer();
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// The mapping between configuration entry DNs and their
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// corresponding connection handler implementations.
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private ConcurrentHashMap<DN, ConnectionHandler> connectionHandlers;
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/**
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* Creates a new instance of this connection handler config manager.
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*/
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public ConnectionHandlerConfigManager() {
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// No implementation is required.
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}
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/**
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* {@inheritDoc}
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*/
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public ConfigChangeResult applyConfigurationAdd(
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ConnectionHandlerCfg configuration) {
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// Default result code.
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ResultCode resultCode = ResultCode.SUCCESS;
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boolean adminActionRequired = false;
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ArrayList<String> messages = new ArrayList<String>();
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// Register as a change listener for this connection handler entry
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// so that we will be notified of any changes that may be made to
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// it.
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configuration.addChangeListener(this);
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// Ignore this connection handler if it is disabled.
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if (configuration.isEnabled()) {
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// The connection handler needs to be enabled.
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DN dn = configuration.dn();
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try {
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// Attempt to start the connection handler.
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ConnectionHandler<? extends ConnectionHandlerCfg> connectionHandler =
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getConnectionHandler(configuration);
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connectionHandler.start();
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// Put this connection handler in the hash so that we will be
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// able to find it if it is altered.
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connectionHandlers.put(dn, connectionHandler);
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// Register the connection handler with the Directory Server.
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DirectoryServer.registerConnectionHandler(connectionHandler);
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} catch (ConfigException e) {
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, e);
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}
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messages.add(e.getMessage());
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resultCode = DirectoryServer.getServerErrorResultCode();
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} catch (Exception e) {
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, e);
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}
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int msgID = MSGID_CONFIG_CONNHANDLER_CANNOT_INITIALIZE;
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messages.add(getMessage(msgID, String.valueOf(configuration
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.getJavaImplementationClass()), String.valueOf(dn),
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stackTraceToSingleLineString(e)));
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resultCode = DirectoryServer.getServerErrorResultCode();
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}
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}
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// Return the configuration result.
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return new ConfigChangeResult(resultCode, adminActionRequired,
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messages);
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}
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/**
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* {@inheritDoc}
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*/
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public ConfigChangeResult applyConfigurationChange(
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ConnectionHandlerCfg configuration) {
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// Attempt to get the existing connection handler. This will only
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// succeed if it was enabled.
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DN dn = configuration.dn();
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ConnectionHandler connectionHandler = connectionHandlers.get(dn);
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// Default result code.
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ResultCode resultCode = ResultCode.SUCCESS;
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boolean adminActionRequired = false;
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ArrayList<String> messages = new ArrayList<String>();
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// See whether the connection handler should be enabled.
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if (connectionHandler == null) {
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if (configuration.isEnabled()) {
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// The connection handler needs to be enabled.
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try {
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// Attempt to start the connection handler.
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connectionHandler = getConnectionHandler(configuration);
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connectionHandler.start();
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// Put this connection handler in the hash so that we will
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// be able to find it if it is altered.
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connectionHandlers.put(dn, connectionHandler);
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// Register the connection handler with the Directory
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// Server.
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DirectoryServer.registerConnectionHandler(
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(ConnectionHandler<? extends ConnectionHandlerCfg>)
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connectionHandler);
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} catch (ConfigException e) {
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, e);
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}
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messages.add(e.getMessage());
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resultCode = DirectoryServer.getServerErrorResultCode();
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} catch (Exception e) {
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, e);
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}
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int msgID = MSGID_CONFIG_CONNHANDLER_CANNOT_INITIALIZE;
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messages.add(getMessage(msgID, String.valueOf(configuration
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.getJavaImplementationClass()), String.valueOf(dn),
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stackTraceToSingleLineString(e)));
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resultCode = DirectoryServer.getServerErrorResultCode();
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}
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}
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} else {
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if (configuration.isEnabled()) {
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// The connection handler is currently active, so we don't
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// need to do anything. Changes to the class name cannot be
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// applied dynamically, so if the class name did change then
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// indicate that administrative action is required for that
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// change to take effect.
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String className = configuration.getJavaImplementationClass();
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if (!className.equals(connectionHandler.getClass().getName())) {
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adminActionRequired = true;
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}
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} else {
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// We need to disable the connection handler.
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DirectoryServer
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.deregisterConnectionHandler(connectionHandler);
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connectionHandlers.remove(dn);
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int id = MSGID_CONNHANDLER_CLOSED_BY_DISABLE;
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connectionHandler.finalizeConnectionHandler(getMessage(id),
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false);
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}
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}
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// Return the configuration result.
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return new ConfigChangeResult(resultCode, adminActionRequired,
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messages);
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}
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/**
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* {@inheritDoc}
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*/
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public ConfigChangeResult applyConfigurationDelete(
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ConnectionHandlerCfg configuration) {
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// Default result code.
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ResultCode resultCode = ResultCode.SUCCESS;
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boolean adminActionRequired = false;
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// See if the entry is registered as a connection handler. If so,
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// deregister and stop it. We'll try to leave any established
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// connections alone if possible.
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DN dn = configuration.dn();
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ConnectionHandler connectionHandler = connectionHandlers.get(dn);
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if (connectionHandler != null) {
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DirectoryServer.deregisterConnectionHandler(connectionHandler);
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int id = MSGID_CONNHANDLER_CLOSED_BY_DELETE;
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connectionHandler.finalizeConnectionHandler(getMessage(id),
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false);
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}
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return new ConfigChangeResult(resultCode, adminActionRequired);
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}
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/**
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* Initializes the configuration associated with the Directory
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* Server connection handlers. This should only be called at
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* Directory Server startup.
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*
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* @throws ConfigException
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* If a critical configuration problem prevents the
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* connection handler initialization from succeeding.
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* @throws InitializationException
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* If a problem occurs while initializing the connection
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* handlers that is not related to the server
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* configuration.
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*/
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public void initializeConnectionHandlerConfig()
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throws ConfigException, InitializationException {
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connectionHandlers = new ConcurrentHashMap<DN, ConnectionHandler>();
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// Get the root configuration which acts as the parent of all
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// connection handlers.
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ServerManagementContext context = ServerManagementContext
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.getInstance();
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RootCfg root = context.getRootConfiguration();
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// Register as an add and delete listener so that we can
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// be notified if new connection handlers are added or existing
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// connection handlers are removed.
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root.addConnectionHandlerAddListener(this);
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root.addConnectionHandlerDeleteListener(this);
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// Initialize existing connection handles.
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for (String name : root.listConnectionHandlers()) {
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ConnectionHandlerCfg config = root
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.getConnectionHandler(name);
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// Register as a change listener for this connection handler
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// entry so that we will be notified of any changes that may be
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// made to it.
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config.addChangeListener(this);
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// Ignore this connection handler if it is disabled.
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if (config.isEnabled()) {
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// Note that we don't want to start the connection handler
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// because we're still in the startup process. Therefore, we
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// will not do so and allow the server to start it at the very
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// end of the initialization process.
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ConnectionHandler<? extends ConnectionHandlerCfg> connectionHandler =
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getConnectionHandler(config);
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// Put this connection handler in the hash so that we will be
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// able to find it if it is altered.
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connectionHandlers.put(config.dn(), connectionHandler);
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// Register the connection handler with the Directory Server.
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DirectoryServer.registerConnectionHandler(connectionHandler);
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}
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}
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}
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/**
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* {@inheritDoc}
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*/
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public boolean isConfigurationAddAcceptable(
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ConnectionHandlerCfg configuration,
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List<String> unacceptableReasons) {
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if (configuration.isEnabled()) {
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// It's enabled so always validate the class.
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return isJavaClassAcceptable(configuration, unacceptableReasons);
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} else {
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// It's disabled so ignore it.
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return true;
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}
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}
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/**
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* {@inheritDoc}
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*/
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public boolean isConfigurationChangeAcceptable(
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ConnectionHandlerCfg configuration,
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List<String> unacceptableReasons) {
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if (configuration.isEnabled()) {
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// It's enabled so always validate the class.
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return isJavaClassAcceptable(configuration, unacceptableReasons);
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} else {
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// It's disabled so ignore it.
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return true;
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}
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}
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/**
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* {@inheritDoc}
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*/
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public boolean isConfigurationDeleteAcceptable(
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ConnectionHandlerCfg configuration,
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List<String> unacceptableReasons) {
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// A delete should always be acceptable, so just return true.
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return true;
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}
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// Load and initialize the connection handler named in the config.
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private ConnectionHandler<? extends ConnectionHandlerCfg>
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getConnectionHandler(ConnectionHandlerCfg config)
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throws ConfigException
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{
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String className = config.getJavaImplementationClass();
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ConnectionHandlerCfgDefn d =
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ConnectionHandlerCfgDefn.getInstance();
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ClassPropertyDefinition pd = d
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.getJavaImplementationClassPropertyDefinition();
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// Load the class and cast it to a connection handler.
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Class<? extends ConnectionHandler> theClass;
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ConnectionHandler connectionHandler;
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try {
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theClass = pd.loadClass(className, ConnectionHandler.class);
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connectionHandler = theClass.newInstance();
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} catch (Exception e) {
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, e);
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}
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int msgID = MSGID_CONFIG_CONNHANDLER_CANNOT_INITIALIZE;
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String message = getMessage(msgID, String.valueOf(className),
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String.valueOf(config.dn()),
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stackTraceToSingleLineString(e));
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throw new ConfigException(msgID, message, e);
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}
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// Perform the necessary initialization for the connection
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// handler.
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try {
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// Determine the initialization method to use: it must take a
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// single parameter which is the exact type of the configuration
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// object.
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Method method = theClass.getMethod(
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"initializeConnectionHandler", config.definition()
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.getServerConfigurationClass());
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method.invoke(connectionHandler, config);
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} catch (Exception e) {
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, e);
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}
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int msgID = MSGID_CONFIG_CONNHANDLER_CANNOT_INITIALIZE;
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String message = getMessage(msgID, String.valueOf(className),
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String.valueOf(config.dn()),
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stackTraceToSingleLineString(e));
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throw new ConfigException(msgID, message, e);
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}
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// The connection handler has been successfully initialized.
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return (ConnectionHandler<? extends ConnectionHandlerCfg>)
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connectionHandler;
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}
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// Determines whether or not the new configuration's implementation
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// class is acceptable.
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private boolean isJavaClassAcceptable(
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ConnectionHandlerCfg config,
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List<String> unacceptableReasons) {
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String className = config.getJavaImplementationClass();
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ConnectionHandlerCfgDefn d =
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ConnectionHandlerCfgDefn.getInstance();
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ClassPropertyDefinition pd = d
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.getJavaImplementationClassPropertyDefinition();
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// Load the class and cast it to a connection handler.
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ConnectionHandler connectionHandler = null;
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Class<? extends ConnectionHandler> theClass;
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try {
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theClass = pd.loadClass(className, ConnectionHandler.class);
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connectionHandler = theClass.newInstance();
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} catch (Exception e) {
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, e);
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}
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int msgID = MSGID_CONFIG_CONNHANDLER_CANNOT_INITIALIZE;
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unacceptableReasons.add(getMessage(msgID, String
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.valueOf(className), String.valueOf(config.dn()),
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stackTraceToSingleLineString(e)));
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return false;
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}
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// Perform the necessary initialization for the connection
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// handler.
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try {
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// Determine the initialization method to use: it must take a
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// single parameter which is the exact type of the configuration
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// object.
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Method method = theClass.getMethod("isConfigurationAcceptable",
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ConnectionHandlerCfg.class,
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List.class);
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Boolean acceptable = (Boolean) method.invoke(connectionHandler, config,
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unacceptableReasons);
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if (! acceptable)
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{
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return false;
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}
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} catch (Exception e) {
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, e);
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}
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int msgID = MSGID_CONFIG_CONNHANDLER_CANNOT_INITIALIZE;
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unacceptableReasons.add(getMessage(msgID, String
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.valueOf(className), String.valueOf(config.dn()),
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stackTraceToSingleLineString(e)));
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return false;
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}
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// The class is valid as far as we can tell.
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return true;
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}
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}
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