/*
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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 java.util.ArrayList;
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import java.util.Iterator;
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import java.util.LinkedHashSet;
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import java.util.List;
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import java.util.Set;
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import java.util.concurrent.ConcurrentHashMap;
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import org.opends.server.api.Backend;
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import org.opends.server.api.BackendInitializationListener;
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import org.opends.server.api.ConfigHandler;
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import org.opends.server.config.ConfigException;
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import org.opends.server.config.ConfigEntry;
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import org.opends.server.config.ConfigConstants;
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import org.opends.server.types.*;
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import static org.opends.server.loggers.ErrorLogger.logError;
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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.*;
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import org.opends.server.admin.server.ConfigurationChangeListener;
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import org.opends.server.admin.server.ConfigurationAddListener;
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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.server.BackendCfg;
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import org.opends.server.admin.std.server.RootCfg;
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import org.opends.server.admin.std.meta.BackendCfgDefn;
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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 backends defined in the Directory Server. It will perform
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* the necessary initialization of those backends when the server is first
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* started, and then will manage any changes to them while the server is
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* running.
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*/
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public class BackendConfigManager implements
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ConfigurationChangeListener<BackendCfg>,
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ConfigurationAddListener<BackendCfg>,
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ConfigurationDeleteListener<BackendCfg>
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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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// backend implementations.
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private ConcurrentHashMap<DN,Backend> registeredBackends;
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/**
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* Creates a new instance of this backend config manager.
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*/
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public BackendConfigManager()
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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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* backends. This should only be called at Directory Server startup.
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*
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* @throws ConfigException If a critical configuration problem prevents the
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* backend initialization from succeeding.
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*
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* @throws InitializationException If a problem occurs while initializing
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* the backends that is not related to the
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* server configuration.
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*/
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public void initializeBackendConfig()
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throws ConfigException, InitializationException
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{
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registeredBackends = new ConcurrentHashMap<DN,Backend>();
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// Create an internal server management context and retrieve
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// the root configuration.
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ServerManagementContext context = ServerManagementContext.getInstance();
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RootCfg root = context.getRootConfiguration();
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// Register add and delete listeners.
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root.addBackendAddListener(this);
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root.addBackendDeleteListener(this);
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// Get the configuration entry that is at the root of all the backends in
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// the server.
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ConfigEntry backendRoot;
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try
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{
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DN configEntryDN = DN.decode(ConfigConstants.DN_BACKEND_BASE);
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backendRoot = DirectoryServer.getConfigEntry(configEntryDN);
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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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Message message =
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ERR_CONFIG_BACKEND_CANNOT_GET_CONFIG_BASE.get(getExceptionMessage(e));
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throw new ConfigException(message, e);
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}
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// If the configuration root entry is null, then assume it doesn't exist.
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// In that case, then fail. At least that entry must exist in the
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// configuration, even if there are no backends defined below it.
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if (backendRoot == null)
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{
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Message message = ERR_CONFIG_BACKEND_BASE_DOES_NOT_EXIST.get();
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throw new ConfigException(message);
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}
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// Initialize existing backends.
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for (String name : root.listBackends())
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{
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// Get the handler's configuration.
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// This will decode and validate its properties.
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BackendCfg backendCfg = root.getBackend(name);
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DN backendDN = backendCfg.dn();
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String backendID = backendCfg.getBackendId();
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// Register as a change listener for this backend so that we can be
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// notified when it is disabled or enabled.
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backendCfg.addChangeListener(this);
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// Ignore this handler if it is disabled.
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if (backendCfg.isEnabled())
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{
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// If there is already a backend registered with the specified ID,
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// then log an error and skip it.
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if (DirectoryServer.hasBackend(backendCfg.getBackendId()))
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{
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Message message = WARN_CONFIG_BACKEND_DUPLICATE_BACKEND_ID.get(
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backendID, String.valueOf(backendDN));
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logError(message);
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continue;
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}
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// See if the entry contains an attribute that specifies the class name
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// for the backend implementation. If it does, then load it and make
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// sure that it's a valid backend implementation. There is no such
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// attribute, the specified class cannot be loaded, or it does not
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// contain a valid backend implementation, then log an error and skip
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// it.
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String className = backendCfg.getJavaClass();
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Class backendClass;
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Backend backend;
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try
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{
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backendClass = DirectoryServer.loadClass(className);
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backend = (Backend) backendClass.newInstance();
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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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Message message = ERR_CONFIG_BACKEND_CANNOT_INSTANTIATE.
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get(String.valueOf(className), String.valueOf(backendDN),
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stackTraceToSingleLineString(e));
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logError(message);
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continue;
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}
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// If this backend is a configuration manager, then we don't want to do
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// any more with it because the configuration will have already been
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// started.
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if (backend instanceof ConfigHandler)
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{
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continue;
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}
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// See if the entry contains an attribute that specifies the writability
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// mode.
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WritabilityMode writabilityMode = WritabilityMode.ENABLED;
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BackendCfgDefn.WritabilityMode bwm =
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backendCfg.getWritabilityMode();
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switch (bwm)
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{
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case DISABLED:
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writabilityMode = WritabilityMode.DISABLED;
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break;
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case ENABLED:
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writabilityMode = WritabilityMode.ENABLED;
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break;
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case INTERNAL_ONLY:
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writabilityMode = WritabilityMode.INTERNAL_ONLY;
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break;
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}
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// Set the backend ID and writability mode for this backend.
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backend.setBackendID(backendID);
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backend.setWritabilityMode(writabilityMode);
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// Acquire a shared lock on this backend. This will prevent operations
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// like LDIF import or restore from occurring while the backend is
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// active.
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try
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{
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String lockFile = LockFileManager.getBackendLockFileName(backend);
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StringBuilder failureReason = new StringBuilder();
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if (! LockFileManager.acquireSharedLock(lockFile, failureReason))
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{
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Message message = ERR_CONFIG_BACKEND_CANNOT_ACQUIRE_SHARED_LOCK.get(
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backendID, String.valueOf(failureReason));
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logError(message);
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// FIXME -- Do we need to send an admin alert?
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continue;
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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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Message message = ERR_CONFIG_BACKEND_CANNOT_ACQUIRE_SHARED_LOCK.get(
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backendID, stackTraceToSingleLineString(e));
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logError(message);
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// FIXME -- Do we need to send an admin alert?
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continue;
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}
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// Perform the necessary initialization for the backend entry.
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try
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{
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initializeBackend(backend, backendCfg);
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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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Message message = ERR_CONFIG_BACKEND_CANNOT_INITIALIZE.
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get(String.valueOf(className), String.valueOf(backendDN),
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stackTraceToSingleLineString(e));
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logError(message);
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try
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{
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String lockFile = LockFileManager.getBackendLockFileName(backend);
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StringBuilder failureReason = new StringBuilder();
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if (! LockFileManager.releaseLock(lockFile, failureReason))
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{
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message = WARN_CONFIG_BACKEND_CANNOT_RELEASE_SHARED_LOCK.
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get(backendID, String.valueOf(failureReason));
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logError(message);
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// FIXME -- Do we need to send an admin alert?
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}
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}
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catch (Exception e2)
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{
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, e2);
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}
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message = WARN_CONFIG_BACKEND_CANNOT_RELEASE_SHARED_LOCK.
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get(backendID, stackTraceToSingleLineString(e2));
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logError(message);
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// FIXME -- Do we need to send an admin alert?
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}
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continue;
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}
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// Notify any backend initialization listeners.
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for (BackendInitializationListener listener :
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DirectoryServer.getBackendInitializationListeners())
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{
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listener.performBackendInitializationProcessing(backend);
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}
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// Register the backend with the server.
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try
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{
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DirectoryServer.registerBackend(backend);
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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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Message message = WARN_CONFIG_BACKEND_CANNOT_REGISTER_BACKEND.get(
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backendID, getExceptionMessage(e));
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logError(message);
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// FIXME -- Do we need to send an admin alert?
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}
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// Put this backend in the hash so that we will be able to find it if it
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// is altered.
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registeredBackends.put(backendDN, backend);
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}
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else
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{
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// The backend is explicitly disabled. Log a mild warning and
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// continue.
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Message message =
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INFO_CONFIG_BACKEND_DISABLED.get(String.valueOf(backendDN));
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logError(message);
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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 isConfigurationChangeAcceptable(
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BackendCfg configEntry,
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List<Message> unacceptableReason)
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{
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DN backendDN = configEntry.dn();
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Set<DN> baseDNs = configEntry.getBaseDN();
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// See if the backend is registered with the server. If it is, then
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// see what's changed and whether those changes are acceptable.
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Backend backend = registeredBackends.get(backendDN);
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if (backend != null)
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{
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LinkedHashSet<DN> removedDNs = new LinkedHashSet<DN>();
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for (DN dn : backend.getBaseDNs())
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{
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removedDNs.add(dn);
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}
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LinkedHashSet<DN> addedDNs = new LinkedHashSet<DN>();
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for (DN dn : baseDNs)
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{
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addedDNs.add(dn);
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}
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Iterator<DN> iterator = removedDNs.iterator();
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while (iterator.hasNext())
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{
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DN dn = iterator.next();
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if (addedDNs.remove(dn))
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{
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iterator.remove();
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}
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}
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// Copy the directory server's base DN registry and make the
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// requested changes to see if it complains.
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BaseDnRegistry reg = DirectoryServer.copyBaseDnRegistry();
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for (DN dn : removedDNs)
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{
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try
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{
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reg.deregisterBaseDN(dn);
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}
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catch (DirectoryException de)
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{
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, de);
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}
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unacceptableReason.add(de.getMessageObject());
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return false;
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}
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}
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for (DN dn : addedDNs)
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{
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try
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{
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reg.registerBaseDN(dn, backend, false);
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}
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catch (DirectoryException de)
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{
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, de);
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}
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unacceptableReason.add(de.getMessageObject());
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return false;
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}
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}
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}
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// See if the entry contains an attribute that specifies the class name
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// for the backend implementation. If it does, then load it and make sure
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// that it's a valid backend implementation. There is no such attribute,
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// the specified class cannot be loaded, or it does not contain a valid
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// backend implementation, then log an error and skip it.
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String className = configEntry.getJavaClass();
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try
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{
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Class backendClass = DirectoryServer.loadClass(className);
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if (! Backend.class.isAssignableFrom(backendClass))
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{
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unacceptableReason.add(ERR_CONFIG_BACKEND_CLASS_NOT_BACKEND.get(
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String.valueOf(className), String.valueOf(backendDN)));
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return false;
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}
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Backend b = (Backend) backendClass.newInstance();
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if (! b.isConfigurationAcceptable(configEntry, unacceptableReason))
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{
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return false;
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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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|
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unacceptableReason.add(ERR_CONFIG_BACKEND_CANNOT_INSTANTIATE.get(
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String.valueOf(className),
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String.valueOf(backendDN),
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stackTraceToSingleLineString(e)));
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return false;
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}
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|
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// If we've gotten to this point, then it is acceptable as far as we are
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// concerned. If it is unacceptable according to the configuration for that
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// backend, then the backend itself will need to make that determination.
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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 applyConfigurationChange(BackendCfg cfg)
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{
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DN backendDN = cfg.dn();
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Backend backend = registeredBackends.get(backendDN);
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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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|
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// See if the entry contains an attribute that indicates whether the
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// backend should be enabled.
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boolean needToEnable = false;
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try
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{
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if (cfg.isEnabled())
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{
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// The backend is marked as enabled. See if that is already true.
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if (backend == null)
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{
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needToEnable = true;
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}
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else
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{
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// It's already enabled, so we don't need to do anything.
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}
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}
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else
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{
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// The backend is marked as disabled. See if that is already true.
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if (backend != null)
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{
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// It isn't disabled, so we will do so now and deregister it from the
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// Directory Server.
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registeredBackends.remove(backendDN);
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DirectoryServer.deregisterBackend(backend);
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for (BackendInitializationListener listener :
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DirectoryServer.getBackendInitializationListeners())
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{
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listener.performBackendFinalizationProcessing(backend);
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}
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backend.finalizeBackend();
|
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// Remove the shared lock for this backend.
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try
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{
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String lockFile = LockFileManager.getBackendLockFileName(backend);
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StringBuilder failureReason = new StringBuilder();
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if (! LockFileManager.releaseLock(lockFile, failureReason))
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{
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Message message = WARN_CONFIG_BACKEND_CANNOT_RELEASE_SHARED_LOCK.
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get(backend.getBackendID(), String.valueOf(failureReason));
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logError(message);
|
// FIXME -- Do we need to send an admin alert?
|
}
|
}
|
catch (Exception e2)
|
{
|
if (debugEnabled())
|
{
|
TRACER.debugCaught(DebugLogLevel.ERROR, e2);
|
}
|
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Message message = WARN_CONFIG_BACKEND_CANNOT_RELEASE_SHARED_LOCK.
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get(backend.getBackendID(), stackTraceToSingleLineString(e2));
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logError(message);
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// FIXME -- Do we need to send an admin alert?
|
}
|
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return new ConfigChangeResult(resultCode, adminActionRequired,
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messages);
|
}
|
else
|
{
|
// It's already disabled, so we don't need to do anything.
|
}
|
}
|
}
|
catch (Exception e)
|
{
|
if (debugEnabled())
|
{
|
TRACER.debugCaught(DebugLogLevel.ERROR, e);
|
}
|
|
|
messages.add(ERR_CONFIG_BACKEND_UNABLE_TO_DETERMINE_ENABLED_STATE.get(
|
String.valueOf(backendDN), stackTraceToSingleLineString(e)));
|
resultCode = DirectoryServer.getServerErrorResultCode();
|
return new ConfigChangeResult(resultCode, adminActionRequired, messages);
|
}
|
|
|
// See if the entry contains an attribute that specifies the backend ID for
|
// the backend.
|
String backendID = cfg.getBackendId();
|
|
// See if the entry contains an attribute that specifies the writability
|
// mode.
|
WritabilityMode writabilityMode = WritabilityMode.ENABLED;
|
BackendCfgDefn.WritabilityMode bwm =
|
cfg.getWritabilityMode();
|
switch (bwm)
|
{
|
case DISABLED:
|
writabilityMode = WritabilityMode.DISABLED;
|
break;
|
case ENABLED:
|
writabilityMode = WritabilityMode.ENABLED;
|
break;
|
case INTERNAL_ONLY:
|
writabilityMode = WritabilityMode.INTERNAL_ONLY;
|
break;
|
}
|
|
|
// See if the entry contains an attribute that specifies the base DNs for
|
// the backend.
|
Set<DN> baseList = cfg.getBaseDN();
|
DN[] baseDNs = new DN[baseList.size()];
|
baseList.toArray(baseDNs);
|
|
|
// See if the entry contains an attribute that specifies the class name
|
// for the backend implementation. If it does, then load it and make sure
|
// that it's a valid backend implementation. There is no such attribute,
|
// the specified class cannot be loaded, or it does not contain a valid
|
// backend implementation, then log an error and skip it.
|
String className = cfg.getJavaClass();
|
|
|
// See if this backend is currently active and if so if the name of the
|
// class is the same.
|
if (backend != null)
|
{
|
if (! className.equals(backend.getClass().getName()))
|
{
|
// It is not the same. Try to load it and see if it is a valid backend
|
// implementation.
|
try
|
{
|
Class backendClass = DirectoryServer.loadClass(className);
|
if (Backend.class.isAssignableFrom(backendClass))
|
{
|
// It appears to be a valid backend class. We'll return that the
|
// change is successful, but indicate that some administrative
|
// action is required.
|
|
messages.add(
|
NOTE_CONFIG_BACKEND_ACTION_REQUIRED_TO_CHANGE_CLASS.get(
|
String.valueOf(backendDN),
|
backend.getClass().getName(), className));
|
adminActionRequired = true;
|
return new ConfigChangeResult(resultCode, adminActionRequired,
|
messages);
|
}
|
else
|
{
|
// It is not a valid backend class. This is an error.
|
|
messages.add(ERR_CONFIG_BACKEND_CLASS_NOT_BACKEND.get(
|
String.valueOf(className), String.valueOf(backendDN)));
|
resultCode = ResultCode.CONSTRAINT_VIOLATION;
|
return new ConfigChangeResult(resultCode, adminActionRequired,
|
messages);
|
}
|
}
|
catch (Exception e)
|
{
|
if (debugEnabled())
|
{
|
TRACER.debugCaught(DebugLogLevel.ERROR, e);
|
}
|
|
|
messages.add(ERR_CONFIG_BACKEND_CANNOT_INSTANTIATE.get(
|
String.valueOf(className), String.valueOf(backendDN),
|
stackTraceToSingleLineString(e)));
|
resultCode = DirectoryServer.getServerErrorResultCode();
|
return new ConfigChangeResult(resultCode, adminActionRequired,
|
messages);
|
}
|
}
|
}
|
|
|
// If we've gotten here, then that should mean that we need to enable the
|
// backend. Try to do so.
|
if (needToEnable)
|
{
|
Class backendClass;
|
try
|
{
|
backendClass = DirectoryServer.loadClass(className);
|
backend = (Backend) backendClass.newInstance();
|
}
|
catch (Exception e)
|
{
|
// It is not a valid backend class. This is an error.
|
|
messages.add(ERR_CONFIG_BACKEND_CLASS_NOT_BACKEND.get(
|
String.valueOf(className), String.valueOf(backendDN)));
|
resultCode = ResultCode.CONSTRAINT_VIOLATION;
|
return new ConfigChangeResult(resultCode, adminActionRequired,
|
messages);
|
}
|
|
|
// Set the backend ID and writability mode for this backend.
|
backend.setBackendID(backendID);
|
backend.setWritabilityMode(writabilityMode);
|
|
|
// Acquire a shared lock on this backend. This will prevent operations
|
// like LDIF import or restore from occurring while the backend is active.
|
try
|
{
|
String lockFile = LockFileManager.getBackendLockFileName(backend);
|
StringBuilder failureReason = new StringBuilder();
|
if (! LockFileManager.acquireSharedLock(lockFile, failureReason))
|
{
|
Message message = ERR_CONFIG_BACKEND_CANNOT_ACQUIRE_SHARED_LOCK.get(
|
backendID, String.valueOf(failureReason));
|
logError(message);
|
// FIXME -- Do we need to send an admin alert?
|
|
resultCode = ResultCode.CONSTRAINT_VIOLATION;
|
adminActionRequired = true;
|
messages.add(message);
|
return new ConfigChangeResult(resultCode, adminActionRequired,
|
messages);
|
}
|
}
|
catch (Exception e)
|
{
|
if (debugEnabled())
|
{
|
TRACER.debugCaught(DebugLogLevel.ERROR, e);
|
}
|
|
Message message = ERR_CONFIG_BACKEND_CANNOT_ACQUIRE_SHARED_LOCK.get(
|
backendID, stackTraceToSingleLineString(e));
|
logError(message);
|
// FIXME -- Do we need to send an admin alert?
|
|
resultCode = ResultCode.CONSTRAINT_VIOLATION;
|
adminActionRequired = true;
|
messages.add(message);
|
return new ConfigChangeResult(resultCode, adminActionRequired,
|
messages);
|
}
|
|
|
try
|
{
|
initializeBackend(backend, cfg);
|
}
|
catch (Exception e)
|
{
|
if (debugEnabled())
|
{
|
TRACER.debugCaught(DebugLogLevel.ERROR, e);
|
}
|
|
messages.add(ERR_CONFIG_BACKEND_CANNOT_INITIALIZE.get(
|
String.valueOf(className), String.valueOf(backendDN),
|
stackTraceToSingleLineString(e)));
|
resultCode = DirectoryServer.getServerErrorResultCode();
|
|
try
|
{
|
String lockFile = LockFileManager.getBackendLockFileName(backend);
|
StringBuilder failureReason = new StringBuilder();
|
if (! LockFileManager.releaseLock(lockFile, failureReason))
|
{
|
Message message = WARN_CONFIG_BACKEND_CANNOT_RELEASE_SHARED_LOCK.
|
get(backendID, String.valueOf(failureReason));
|
logError(message);
|
// FIXME -- Do we need to send an admin alert?
|
}
|
}
|
catch (Exception e2)
|
{
|
if (debugEnabled())
|
{
|
TRACER.debugCaught(DebugLogLevel.ERROR, e2);
|
}
|
|
Message message = WARN_CONFIG_BACKEND_CANNOT_RELEASE_SHARED_LOCK.get(
|
backendID, stackTraceToSingleLineString(e2));
|
logError(message);
|
// FIXME -- Do we need to send an admin alert?
|
}
|
|
return new ConfigChangeResult(resultCode, adminActionRequired,
|
messages);
|
}
|
|
|
// Notify any backend initialization listeners.
|
for (BackendInitializationListener listener :
|
DirectoryServer.getBackendInitializationListeners())
|
{
|
listener.performBackendInitializationProcessing(backend);
|
}
|
|
|
// Register the backend with the server.
|
try
|
{
|
DirectoryServer.registerBackend(backend);
|
}
|
catch (Exception e)
|
{
|
if (debugEnabled())
|
{
|
TRACER.debugCaught(DebugLogLevel.ERROR, e);
|
}
|
|
Message message = WARN_CONFIG_BACKEND_CANNOT_REGISTER_BACKEND.get(
|
backendID, getExceptionMessage(e));
|
|
resultCode = DirectoryServer.getServerErrorResultCode();
|
messages.add(message);
|
|
logError(message);
|
// FIXME -- Do we need to send an admin alert?
|
|
return new ConfigChangeResult(resultCode, adminActionRequired,
|
messages);
|
}
|
|
|
registeredBackends.put(backendDN, backend);
|
}
|
else if ((resultCode == ResultCode.SUCCESS) && (backend != null))
|
{
|
// The backend is already enabled, so we may need to apply a
|
// configuration change. Check to see if the writability mode has been
|
// changed.
|
if (writabilityMode != backend.getWritabilityMode())
|
{
|
backend.setWritabilityMode(writabilityMode);
|
}
|
}
|
|
|
return new ConfigChangeResult(resultCode, adminActionRequired, messages);
|
}
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
public boolean isConfigurationAddAcceptable(
|
BackendCfg configEntry,
|
List<Message> unacceptableReason)
|
{
|
DN backendDN = configEntry.dn();
|
|
|
// See if the entry contains an attribute that specifies the backend ID. If
|
// it does not, then skip it.
|
String backendID = configEntry.getBackendId();
|
if (DirectoryServer.hasBackend(backendID))
|
{
|
unacceptableReason.add(WARN_CONFIG_BACKEND_DUPLICATE_BACKEND_ID.get(
|
String.valueOf(backendDN), backendID));
|
return false;
|
}
|
|
|
// See if the entry contains an attribute that specifies the set of base DNs
|
// for the backend. If it does not, then skip it.
|
Set<DN> baseList = configEntry.getBaseDN();
|
DN[] baseDNs = new DN[baseList.size()];
|
baseList.toArray(baseDNs);
|
|
|
// See if the entry contains an attribute that specifies the class name
|
// for the backend implementation. If it does, then load it and make sure
|
// that it's a valid backend implementation. There is no such attribute,
|
// the specified class cannot be loaded, or it does not contain a valid
|
// backend implementation, then log an error and skip it.
|
String className = configEntry.getJavaClass();
|
|
Backend backend;
|
try
|
{
|
Class backendClass = DirectoryServer.loadClass(className);
|
backend = (Backend) backendClass.newInstance();
|
}
|
catch (Exception e)
|
{
|
if (debugEnabled())
|
{
|
TRACER.debugCaught(DebugLogLevel.ERROR, e);
|
}
|
|
unacceptableReason.add(ERR_CONFIG_BACKEND_CANNOT_INSTANTIATE.get(
|
String.valueOf(className),
|
String.valueOf(backendDN),
|
stackTraceToSingleLineString(e)));
|
return false;
|
}
|
|
|
// Make sure that all of the base DNs are acceptable for use in the server.
|
BaseDnRegistry reg = DirectoryServer.copyBaseDnRegistry();
|
for (DN baseDN : baseDNs)
|
{
|
try
|
{
|
reg.registerBaseDN(baseDN, backend, false);
|
}
|
catch (DirectoryException de)
|
{
|
unacceptableReason.add(de.getMessageObject());
|
return false;
|
}
|
catch (Exception e)
|
{
|
unacceptableReason.add(getExceptionMessage(e));
|
return false;
|
}
|
}
|
|
|
// If we've gotten to this point, then it is acceptable as far as we are
|
// concerned. If it is unacceptable according to the configuration for that
|
// backend, then the backend itself will need to make that determination.
|
return true;
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
public ConfigChangeResult applyConfigurationAdd(BackendCfg cfg)
|
{
|
DN backendDN = cfg.dn();
|
ResultCode resultCode = ResultCode.SUCCESS;
|
boolean adminActionRequired = false;
|
ArrayList<Message> messages = new ArrayList<Message>();
|
|
|
// Register as a change listener for this backend entry so that we will
|
// be notified of any changes that may be made to it.
|
cfg.addChangeListener(this);
|
|
|
// See if the entry contains an attribute that indicates whether the
|
// backend should be enabled. If it does not, or if it is not set to
|
// "true", then skip it.
|
if (!cfg.isEnabled())
|
{
|
// The backend is explicitly disabled. We will log a message to
|
// indicate that it won't be enabled and return.
|
Message message =
|
INFO_CONFIG_BACKEND_DISABLED.get(String.valueOf(backendDN));
|
logError(message);
|
messages.add(message);
|
return new ConfigChangeResult(resultCode, adminActionRequired,
|
messages);
|
}
|
|
|
|
// See if the entry contains an attribute that specifies the backend ID. If
|
// it does not, then skip it.
|
String backendID = cfg.getBackendId();
|
if (DirectoryServer.hasBackend(backendID))
|
{
|
Message message = WARN_CONFIG_BACKEND_DUPLICATE_BACKEND_ID.get(
|
String.valueOf(backendDN), backendID);
|
logError(message);
|
messages.add(message);
|
return new ConfigChangeResult(resultCode, adminActionRequired,
|
messages);
|
}
|
|
|
// See if the entry contains an attribute that specifies the writability
|
// mode.
|
WritabilityMode writabilityMode = WritabilityMode.ENABLED;
|
BackendCfgDefn.WritabilityMode bwm =
|
cfg.getWritabilityMode();
|
switch (bwm)
|
{
|
case DISABLED:
|
writabilityMode = WritabilityMode.DISABLED;
|
break;
|
case ENABLED:
|
writabilityMode = WritabilityMode.ENABLED;
|
break;
|
case INTERNAL_ONLY:
|
writabilityMode = WritabilityMode.INTERNAL_ONLY;
|
break;
|
}
|
|
|
// See if the entry contains an attribute that specifies the base DNs for
|
// the entry. If it does not, then skip it.
|
Set<DN> dnList = cfg.getBaseDN();
|
DN[] baseDNs = new DN[dnList.size()];
|
dnList.toArray(baseDNs);
|
|
|
// See if the entry contains an attribute that specifies the class name
|
// for the backend implementation. If it does, then load it and make sure
|
// that it's a valid backend implementation. There is no such attribute,
|
// the specified class cannot be loaded, or it does not contain a valid
|
// backend implementation, then log an error and skip it.
|
String className = cfg.getJavaClass();
|
Class backendClass;
|
|
Backend backend;
|
try
|
{
|
backendClass = DirectoryServer.loadClass(className);
|
backend = (Backend) backendClass.newInstance();
|
}
|
catch (Exception e)
|
{
|
if (debugEnabled())
|
{
|
TRACER.debugCaught(DebugLogLevel.ERROR, e);
|
}
|
|
messages.add(ERR_CONFIG_BACKEND_CANNOT_INSTANTIATE.get(
|
String.valueOf(className),
|
String.valueOf(backendDN),
|
stackTraceToSingleLineString(e)));
|
resultCode = DirectoryServer.getServerErrorResultCode();
|
return new ConfigChangeResult(resultCode, adminActionRequired,
|
messages);
|
}
|
|
|
// Set the backend ID and writability mode for this backend.
|
backend.setBackendID(backendID);
|
backend.setWritabilityMode(writabilityMode);
|
|
|
// Acquire a shared lock on this backend. This will prevent operations
|
// like LDIF import or restore from occurring while the backend is active.
|
try
|
{
|
String lockFile = LockFileManager.getBackendLockFileName(backend);
|
StringBuilder failureReason = new StringBuilder();
|
if (! LockFileManager.acquireSharedLock(lockFile, failureReason))
|
{
|
Message message = ERR_CONFIG_BACKEND_CANNOT_ACQUIRE_SHARED_LOCK.get(
|
backendID, String.valueOf(failureReason));
|
logError(message);
|
// FIXME -- Do we need to send an admin alert?
|
|
resultCode = ResultCode.CONSTRAINT_VIOLATION;
|
adminActionRequired = true;
|
messages.add(message);
|
return new ConfigChangeResult(resultCode, adminActionRequired,
|
messages);
|
}
|
}
|
catch (Exception e)
|
{
|
if (debugEnabled())
|
{
|
TRACER.debugCaught(DebugLogLevel.ERROR, e);
|
}
|
|
Message message = ERR_CONFIG_BACKEND_CANNOT_ACQUIRE_SHARED_LOCK.get(
|
backendID, stackTraceToSingleLineString(e));
|
logError(message);
|
// FIXME -- Do we need to send an admin alert?
|
|
resultCode = ResultCode.CONSTRAINT_VIOLATION;
|
adminActionRequired = true;
|
messages.add(message);
|
return new ConfigChangeResult(resultCode, adminActionRequired,
|
messages);
|
}
|
|
|
// Perform the necessary initialization for the backend entry.
|
try
|
{
|
initializeBackend(backend, cfg);
|
}
|
catch (Exception e)
|
{
|
if (debugEnabled())
|
{
|
TRACER.debugCaught(DebugLogLevel.ERROR, e);
|
}
|
|
messages.add(ERR_CONFIG_BACKEND_CANNOT_INITIALIZE.get(
|
String.valueOf(className),
|
String.valueOf(backendDN),
|
stackTraceToSingleLineString(e)));
|
resultCode = DirectoryServer.getServerErrorResultCode();
|
|
try
|
{
|
String lockFile = LockFileManager.getBackendLockFileName(backend);
|
StringBuilder failureReason = new StringBuilder();
|
if (! LockFileManager.releaseLock(lockFile, failureReason))
|
{
|
Message message = WARN_CONFIG_BACKEND_CANNOT_RELEASE_SHARED_LOCK.get(
|
backendID, String.valueOf(failureReason));
|
logError(message);
|
// FIXME -- Do we need to send an admin alert?
|
}
|
}
|
catch (Exception e2)
|
{
|
if (debugEnabled())
|
{
|
TRACER.debugCaught(DebugLogLevel.ERROR, e2);
|
}
|
|
Message message = WARN_CONFIG_BACKEND_CANNOT_RELEASE_SHARED_LOCK.get(
|
backendID, stackTraceToSingleLineString(e2));
|
logError(message);
|
// FIXME -- Do we need to send an admin alert?
|
}
|
|
return new ConfigChangeResult(resultCode, adminActionRequired, messages);
|
}
|
|
|
// Notify any backend initialization listeners.
|
for (BackendInitializationListener listener :
|
DirectoryServer.getBackendInitializationListeners())
|
{
|
listener.performBackendInitializationProcessing(backend);
|
}
|
|
|
// At this point, the backend should be online. Add it as one of the
|
// registered backends for this backend config manager.
|
try
|
{
|
DirectoryServer.registerBackend(backend);
|
}
|
catch (Exception e)
|
{
|
if (debugEnabled())
|
{
|
TRACER.debugCaught(DebugLogLevel.ERROR, e);
|
}
|
|
Message message = WARN_CONFIG_BACKEND_CANNOT_REGISTER_BACKEND.get(
|
backendID, getExceptionMessage(e));
|
|
resultCode = DirectoryServer.getServerErrorResultCode();
|
messages.add(message);
|
|
logError(message);
|
// FIXME -- Do we need to send an admin alert?
|
|
return new ConfigChangeResult(resultCode, adminActionRequired,
|
messages);
|
}
|
|
registeredBackends.put(backendDN, backend);
|
return new ConfigChangeResult(resultCode, adminActionRequired, messages);
|
}
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
public boolean isConfigurationDeleteAcceptable(
|
BackendCfg configEntry,
|
List<Message> unacceptableReason)
|
{
|
DN backendDN = configEntry.dn();
|
|
|
// See if this backend config manager has a backend registered with the
|
// provided DN. If not, then we don't care if the entry is deleted. If we
|
// do know about it, then that means that it is enabled and we will not
|
// allow removing a backend that is enabled.
|
Backend backend = registeredBackends.get(backendDN);
|
if (backend == null)
|
{
|
return true;
|
}
|
|
|
// See if the backend has any subordinate backends. If so, then it is not
|
// acceptable to remove it. Otherwise, it should be fine.
|
Backend[] subBackends = backend.getSubordinateBackends();
|
if ((subBackends == null) || (subBackends.length == 0))
|
{
|
return true;
|
}
|
else
|
{
|
unacceptableReason.add(
|
NOTE_CONFIG_BACKEND_CANNOT_REMOVE_BACKEND_WITH_SUBORDINATES.get(
|
String.valueOf(backendDN)));
|
return false;
|
}
|
}
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
public ConfigChangeResult applyConfigurationDelete(BackendCfg configEntry)
|
{
|
DN backendDN = configEntry.dn();
|
ResultCode resultCode = ResultCode.SUCCESS;
|
boolean adminActionRequired = false;
|
ArrayList<Message> messages = new ArrayList<Message>();
|
|
|
// See if this backend config manager has a backend registered with the
|
// provided DN. If not, then we don't care if the entry is deleted.
|
Backend backend = registeredBackends.get(backendDN);
|
if (backend == null)
|
{
|
return new ConfigChangeResult(resultCode, adminActionRequired,
|
messages);
|
}
|
|
|
// See if the backend has any subordinate backends. If so, then it is not
|
// acceptable to remove it. Otherwise, it should be fine.
|
Backend[] subBackends = backend.getSubordinateBackends();
|
if ((subBackends == null) || (subBackends.length == 0))
|
{
|
registeredBackends.remove(backendDN);
|
|
try
|
{
|
backend.finalizeBackend();
|
}
|
catch (Exception e)
|
{
|
if (debugEnabled())
|
{
|
TRACER.debugCaught(DebugLogLevel.ERROR, e);
|
}
|
}
|
|
for (BackendInitializationListener listener :
|
DirectoryServer.getBackendInitializationListeners())
|
{
|
listener.performBackendFinalizationProcessing(backend);
|
}
|
|
DirectoryServer.deregisterBackend(backend);
|
configEntry.removeChangeListener(this);
|
|
// Remove the shared lock for this backend.
|
try
|
{
|
String lockFile = LockFileManager.getBackendLockFileName(backend);
|
StringBuilder failureReason = new StringBuilder();
|
if (! LockFileManager.releaseLock(lockFile, failureReason))
|
{
|
Message message = WARN_CONFIG_BACKEND_CANNOT_RELEASE_SHARED_LOCK.get(
|
backend.getBackendID(), String.valueOf(failureReason));
|
logError(message);
|
// FIXME -- Do we need to send an admin alert?
|
}
|
}
|
catch (Exception e2)
|
{
|
if (debugEnabled())
|
{
|
TRACER.debugCaught(DebugLogLevel.ERROR, e2);
|
}
|
|
Message message = WARN_CONFIG_BACKEND_CANNOT_RELEASE_SHARED_LOCK.get(
|
backend.getBackendID(), stackTraceToSingleLineString(e2));
|
logError(message);
|
// FIXME -- Do we need to send an admin alert?
|
}
|
|
return new ConfigChangeResult(resultCode, adminActionRequired,
|
messages);
|
}
|
else
|
{
|
|
messages.add(NOTE_CONFIG_BACKEND_CANNOT_REMOVE_BACKEND_WITH_SUBORDINATES
|
.get(String.valueOf(backendDN)));
|
resultCode = ResultCode.UNWILLING_TO_PERFORM;
|
return new ConfigChangeResult(resultCode, adminActionRequired, messages);
|
}
|
}
|
|
@SuppressWarnings("unchecked")
|
private static void initializeBackend(Backend backend, BackendCfg cfg)
|
throws ConfigException, InitializationException
|
{
|
backend.configureBackend(cfg);
|
backend.initializeBackend();
|
}
|
|
}
|
