/*
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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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* Copyright 2006-2008 Sun Microsystems, Inc.
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*/
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package org.opends.server.core;
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import org.opends.messages.Message;
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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.messages.ConfigMessages.*;
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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.SynchronizationProviderCfgDefn;
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import org.opends.server.admin.std.server.RootCfg;
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import org.opends.server.admin.std.server.SynchronizationProviderCfg;
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import org.opends.server.api.SynchronizationProvider;
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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 configuration
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* for the set of synchronization providers configured in the Directory Server.
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* It will perform the necessary initialization of those synchronization
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* providers when the server is first started, and then will manage any changes
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* to them while the server is running.
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*/
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public class SynchronizationProviderConfigManager
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implements ConfigurationChangeListener<SynchronizationProviderCfg>,
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ConfigurationAddListener<SynchronizationProviderCfg>,
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ConfigurationDeleteListener<SynchronizationProviderCfg>
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{
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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 corresponding
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// synchronization provider implementations.
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private ConcurrentHashMap<DN,
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SynchronizationProvider<SynchronizationProviderCfg>> registeredProviders =
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new ConcurrentHashMap<DN,
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SynchronizationProvider<SynchronizationProviderCfg>>();
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/**
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* Creates a new instance of this synchronization provider config manager.
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*/
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public SynchronizationProviderConfigManager()
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{
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// No implementation is required.
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}
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/**
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* Initializes the configuration associated with the Directory Server
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* synchronization providers. This should only be called at Directory Server
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* startup.
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*
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* @throws ConfigException If a critical configuration problem prevents any
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* of the synchronization providers from starting
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* properly.
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*
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* @throws InitializationException If a problem occurs while initializing
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* any of the synchronization providers that
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* is not related to the Directory Server
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* configuration.
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*/
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public void initializeSynchronizationProviders()
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throws ConfigException, InitializationException
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{
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// Create an internal server management context and retrieve
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// the root configuration which has the synchronization provider relation.
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ServerManagementContext context = ServerManagementContext.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 when new synchronization providers are added or existing
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// sycnhronization providers are removed.
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root.addSynchronizationProviderAddListener(this);
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root.addSynchronizationProviderDeleteListener(this);
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// Initialize existing synchronization providers.
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for (String name : root.listSynchronizationProviders())
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{
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// Get the synchronization provider's configuration.
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// This will automatically decode and validate its properties.
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SynchronizationProviderCfg config = root.getSynchronizationProvider(name);
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// Register as a change listener for this synchronization provider
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// entry so that we can be notified when it is disabled or enabled.
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config.addChangeListener(this);
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// Ignore this synchronization provider if it is disabled.
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if (config.isEnabled())
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{
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// Perform initialization, load the synchronization provider's
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// implementation class and initialize it.
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SynchronizationProvider<SynchronizationProviderCfg> provider =
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getSynchronizationProvider(config);
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// Register the synchronization provider with the Directory Server.
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DirectoryServer.registerSynchronizationProvider(provider);
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// Put this synchronization provider in the hash map so that we will be
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// able to find it if it is deleted or disabled.
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registeredProviders.put(config.dn(), provider);
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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 ConfigChangeResult applyConfigurationChange(
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SynchronizationProviderCfg configuration)
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{
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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<Message> messages = new ArrayList<Message>();
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// Attempt to get the existing synchronization provider. This will only
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// succeed if it is currently enabled.
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DN dn = configuration.dn();
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SynchronizationProvider<SynchronizationProviderCfg> provider =
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registeredProviders.get(dn);
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// See whether the synchronization provider should be enabled.
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if (provider == null)
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{
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if (configuration.isEnabled())
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{
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// The synchronization provider needs to be enabled. Load, initialize,
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// and register the synchronization provider as per the add listener
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// method.
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try
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{
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// Perform initialization, load the synchronization provider's
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// implementation class and initialize it.
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provider = getSynchronizationProvider(configuration);
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// Register the synchronization provider with the Directory Server.
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DirectoryServer.registerSynchronizationProvider(provider);
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// Put this synchronization provider in the hash map so that we will
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// be able to find it if it is deleted or disabled.
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registeredProviders.put(configuration.dn(), provider);
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}
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catch (ConfigException e)
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{
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, e);
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messages.add(e.getMessageObject());
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resultCode = DirectoryServer.getServerErrorResultCode();
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}
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}
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catch (Exception e)
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{
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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(ERR_CONFIG_SYNCH_ERROR_INITIALIZING_PROVIDER.get(
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String.valueOf(configuration.getJavaClass()),
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String.valueOf(configuration.dn())));
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resultCode = DirectoryServer.getServerErrorResultCode();
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}
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}
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}
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else
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{
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if (configuration.isEnabled())
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{
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// The synchronization provider 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.getJavaClass();
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if (!className.equals(provider.getClass().getName()))
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{
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adminActionRequired = true;
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}
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}
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else
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{
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// The connection handler is being disabled so remove it from
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// the DirectorySerevr list, shut it down and remove it from the
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// hash map.
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DirectoryServer.deregisterSynchronizationProvider(provider);
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provider.finalizeSynchronizationProvider();
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registeredProviders.remove(dn);
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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 boolean isConfigurationChangeAcceptable(
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SynchronizationProviderCfg configuration,
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List<Message> unacceptableReasons)
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{
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if (configuration.isEnabled())
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{
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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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{
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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 ConfigChangeResult applyConfigurationAdd(
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SynchronizationProviderCfg configuration)
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{
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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<Message> messages = new ArrayList<Message>();
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// Register as a change listener for this synchronization provider entry
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// so that we will be notified if when it is disabled or enabled.
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configuration.addChangeListener(this);
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// Ignore this synchronization provider if it is disabled.
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if (configuration.isEnabled())
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{
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try
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{
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// Perform initialization, load the synchronization provider's
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// implementation class and initialize it.
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SynchronizationProvider<SynchronizationProviderCfg> provider =
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getSynchronizationProvider(configuration);
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// Register the synchronization provider with the Directory Server.
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DirectoryServer.registerSynchronizationProvider(provider);
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// Put this synchronization provider in the hash map so that we will be
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// able to find it if it is deleted or disabled.
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registeredProviders.put(configuration.dn(), provider);
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}
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catch (ConfigException e)
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{
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, e);
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messages.add(e.getMessageObject());
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resultCode = DirectoryServer.getServerErrorResultCode();
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}
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}
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catch (Exception e)
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{
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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(ERR_CONFIG_SYNCH_ERROR_INITIALIZING_PROVIDER.get(
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String.valueOf(configuration.getJavaClass()),
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String.valueOf(configuration.dn())));
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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 boolean isConfigurationAddAcceptable(
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SynchronizationProviderCfg configuration,
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List<Message> unacceptableReasons)
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{
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if (configuration.isEnabled())
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{
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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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{
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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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* Check if the class provided in the configuration is an acceptable
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* java class for a synchronization provider.
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*
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* @param configuration The configuration for which the class must be
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* checked.
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* @return true if the class is acceptable or false if not.
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*/
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@SuppressWarnings("unchecked")
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private SynchronizationProvider<SynchronizationProviderCfg>
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getSynchronizationProvider(SynchronizationProviderCfg configuration)
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throws ConfigException
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{
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String className = configuration.getJavaClass();
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SynchronizationProviderCfgDefn d =
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SynchronizationProviderCfgDefn.getInstance();
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ClassPropertyDefinition pd =
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d.getJavaClassPropertyDefinition();
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// Load the class
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Class<? extends SynchronizationProvider> theClass;
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SynchronizationProvider<SynchronizationProviderCfg> provider;
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try
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{
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theClass = pd.loadClass(className, SynchronizationProvider.class);
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} catch (Exception e)
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{
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// Handle the exception: put a message in the unacceptable reasons.
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Message message = ERR_CONFIG_SYNCH_UNABLE_TO_LOAD_PROVIDER_CLASS.
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get(String.valueOf(className), String.valueOf(configuration.dn()),
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stackTraceToSingleLineString(e));
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throw new ConfigException(message, e);
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}
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try
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{
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// Instantiate the class.
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provider = theClass.newInstance();
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} catch (Exception e)
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{
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// Handle the exception: put a message in the unacceptable reasons.
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Message message = ERR_CONFIG_SYNCH_UNABLE_TO_INSTANTIATE_PROVIDER.
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get(String.valueOf(className), String.valueOf(configuration.dn()),
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stackTraceToSingleLineString(e));
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throw new ConfigException(message, e);
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}
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try
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{
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// Initialize the Synchronization Provider.
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provider.initializeSynchronizationProvider(configuration);
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} catch (Exception e)
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{
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try
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{
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provider.finalizeSynchronizationProvider();
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}
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catch(Exception ce)
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{}
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// Handle the exception: put a message in the unacceptable reasons.
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Message message = ERR_CONFIG_SYNCH_ERROR_INITIALIZING_PROVIDER.get(
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String.valueOf(className), String.valueOf(configuration.dn()));
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throw new ConfigException(message, e);
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}
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return provider;
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}
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/**
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* Check if the class provided in the configuration is an acceptable
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* java class for a synchronization provider.
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*
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* @param configuration The configuration for which the class must be
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* checked.
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* @param unacceptableReasons A list containing the reasons why the class is
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* not acceptable.
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*
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* @return true if the class is acceptable or false if not.
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*/
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private boolean isJavaClassAcceptable(
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SynchronizationProviderCfg configuration,
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List<Message> unacceptableReasons)
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{
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String className = configuration.getJavaClass();
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SynchronizationProviderCfgDefn d =
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SynchronizationProviderCfgDefn.getInstance();
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ClassPropertyDefinition pd =
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d.getJavaClassPropertyDefinition();
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// Load the class and cast it to a synchronizationProvider.
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SynchronizationProvider provider = null;
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Class<? extends SynchronizationProvider> theClass;
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try
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{
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theClass = pd.loadClass(className, SynchronizationProvider.class);
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provider = theClass.newInstance();
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} catch (Exception e)
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{
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// Handle the exception: put a message in the unacceptable reasons.
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Message message = ERR_CONFIG_SYNCH_UNABLE_TO_LOAD_PROVIDER_CLASS.get(
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String.valueOf(className),
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String.valueOf(configuration.dn()),
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stackTraceToSingleLineString(e));
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unacceptableReasons.add(message);
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return false;
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}
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// Check that the implementation class implements the correct interface.
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try
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{
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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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SynchronizationProviderCfg.class,
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List.class);
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Boolean acceptable = (Boolean) method.invoke(provider, configuration,
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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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{
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// Handle the exception: put a message in the unacceptable reasons.
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Message message = ERR_CONFIG_SYNCH_UNABLE_TO_INSTANTIATE_PROVIDER.get(
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String.valueOf(className),
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String.valueOf(configuration.dn()),
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stackTraceToSingleLineString(e));
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unacceptableReasons.add(message);
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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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* {@inheritDoc}
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*/
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public ConfigChangeResult applyConfigurationDelete(
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SynchronizationProviderCfg configuration)
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{
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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 synchronization provider. If so,
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// deregister and stop it.
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DN dn = configuration.dn();
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SynchronizationProvider provider = registeredProviders.get(dn);
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if (provider != null)
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{
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DirectoryServer.deregisterSynchronizationProvider(provider);
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provider.finalizeSynchronizationProvider();
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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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* {@inheritDoc}
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*/
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public boolean isConfigurationDeleteAcceptable(
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SynchronizationProviderCfg configuration,
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List<Message> unacceptableReasons)
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{
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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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}
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