Migrate the key and trust manager provider configuration to the admin frame...

neil_a_wilson

29.54.2007 68ceb8ea8c8d2c2745f1c2449635764f4a51a993

 opends/src/server/org/opends/server/core/TrustManagerProviderConfigManager.java

@@ -28,22 +28,21 @@



import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;

import org.opends.server.api.ConfigAddListener;
import org.opends.server.api.ConfigChangeListener;
import org.opends.server.api.ConfigDeleteListener;
import org.opends.server.api.ConfigHandler;
import org.opends.server.api.ConfigurableComponent;
import org.opends.server.admin.ClassPropertyDefinition;
import org.opends.server.admin.server.ConfigurationAddListener;
import org.opends.server.admin.server.ConfigurationChangeListener;
import org.opends.server.admin.server.ConfigurationDeleteListener;
import org.opends.server.admin.std.meta.TrustManagerCfgDefn;
import org.opends.server.admin.std.server.TrustManagerCfg;
import org.opends.server.admin.std.server.RootCfg;
import org.opends.server.admin.server.ServerManagementContext;
import org.opends.server.api.TrustManagerProvider;
import org.opends.server.config.BooleanConfigAttribute;
import org.opends.server.config.ConfigEntry;
import org.opends.server.config.ConfigException;
import org.opends.server.config.StringConfigAttribute;
import org.opends.server.types.ConfigChangeResult;
import org.opends.server.types.DN;
import org.opends.server.types.ErrorLogCategory;
@@ -51,42 +50,30 @@
import org.opends.server.types.InitializationException;
import org.opends.server.types.ResultCode;

import static org.opends.server.config.ConfigConstants.*;
import org.opends.server.types.DebugLogLevel;
import static org.opends.server.loggers.ErrorLogger.*;
import static org.opends.server.loggers.debug.DebugLogger.*;
import org.opends.server.loggers.debug.DebugTracer;
import static org.opends.server.messages.ConfigMessages.*;
import static org.opends.server.messages.MessageHandler.*;
import static org.opends.server.util.ServerConstants.*;
import static org.opends.server.util.StaticUtils.*;



/**
 * This class defines a utility that will be used to manage the set of
 * trust manager providers defined in the Directory Server.  It will initialize
 * the providers when the server starts, and then will manage any additions,
 * removals, or modifications of any trust manager providers while the server is
 * running.
 * This class defines a utility that will be used to manage the set of trust
 * manager providers defined in the Directory Server.  It will initialize the
 * trust manager providers when the server starts, and then will manage any
 * additions, removals, or modifications to any trust manager providers while
 * the server is running.
 */
public class TrustManagerProviderConfigManager
       implements ConfigChangeListener, ConfigAddListener, ConfigDeleteListener
       implements ConfigurationChangeListener<TrustManagerCfg>,
                  ConfigurationAddListener<TrustManagerCfg>,
                  ConfigurationDeleteListener<TrustManagerCfg>

{
  /**
   * The tracer object for the debug logger.
   */
  private static final DebugTracer TRACER = getTracer();




  // A mapping between the DNs of the config entries and the associated
  // trust manager providers.
  // A mapping between the DNs of the config entries and the associated trust
  // manager providers.
  private ConcurrentHashMap<DN,TrustManagerProvider> providers;

  // The configuration handler for the Directory Server.
  private ConfigHandler configHandler;



  /**
@@ -94,8 +81,7 @@
   */
  public TrustManagerProviderConfigManager()
  {
    configHandler = DirectoryServer.getConfigHandler();
    providers     = new ConcurrentHashMap<DN,TrustManagerProvider>();
    providers = new ConcurrentHashMap<DN,TrustManagerProvider>();
  }


@@ -115,855 +101,312 @@
  public void initializeTrustManagerProviders()
         throws ConfigException, InitializationException
  {
    // First, get the configuration base entry.
    ConfigEntry baseEntry;
    try
    // Get the root configuration object.
    ServerManagementContext managementContext =
         ServerManagementContext.getInstance();
    RootCfg rootConfiguration =
         managementContext.getRootConfiguration();


    // Register as an add and delete listener with the root configuration so we
    // can be notified if any trust manager provider entries are added or
    // removed.
    rootConfiguration.addTrustManagerAddListener(this);
    rootConfiguration.addTrustManagerDeleteListener(this);


    //Initialize the existing trust manager providers.
    for (String name : rootConfiguration.listTrustManagers())
    {
      DN providerBase = DN.decode(DN_TRUSTMANAGER_PROVIDER_CONFIG_BASE);
      baseEntry = configHandler.getConfigEntry(providerBase);
    }
    catch (Exception e)
    {
      if (debugEnabled())
      TrustManagerCfg providerConfig = rootConfiguration.getTrustManager(name);
      providerConfig.addChangeListener(this);

      if (providerConfig.isEnabled())
      {
        TRACER.debugCaught(DebugLogLevel.ERROR, e);
      }

      int    msgID   = MSGID_CONFIG_TRUSTMANAGER_CANNOT_GET_BASE;
      String message = getMessage(msgID, String.valueOf(e));
      throw new ConfigException(msgID, message, e);
    }

    if (baseEntry == null)
    {
      // The trust manager provider base entry does not exist.  This is not
      // acceptable, so throw an exception.
      int    msgID   = MSGID_CONFIG_TRUSTMANAGER_BASE_DOES_NOT_EXIST;
      String message = getMessage(msgID);
      throw new ConfigException(msgID, message);
    }


    // Register add and delete listeners with the trust manager provider base
    // entry.  We don't care about modifications to it.
    baseEntry.registerAddListener(this);
    baseEntry.registerDeleteListener(this);


    // See if the base entry has any children.  If not, then we don't need to do
    // anything else.
    if (! baseEntry.hasChildren())
    {
      return;
    }


    // Iterate through the child entries and process them as trust manager
    // provider configuration entries.
    for (ConfigEntry childEntry : baseEntry.getChildren().values())
    {
      childEntry.registerChangeListener(this);

      StringBuilder unacceptableReason = new StringBuilder();
      if (! configAddIsAcceptable(childEntry, unacceptableReason))
      {
        logError(ErrorLogCategory.CONFIGURATION, ErrorLogSeverity.SEVERE_ERROR,
                 MSGID_CONFIG_TRUSTMANAGER_ENTRY_UNACCEPTABLE,
                 childEntry.getDN().toString(), unacceptableReason.toString());
        continue;
      }

      try
      {
        ConfigChangeResult result = applyConfigurationAdd(childEntry);
        if (result.getResultCode() != ResultCode.SUCCESS)
        String className = providerConfig.getJavaImplementationClass();
        try
        {
          StringBuilder buffer = new StringBuilder();

          List<String> resultMessages = result.getMessages();
          if ((resultMessages == null) || (resultMessages.isEmpty()))
          {
            buffer.append(getMessage(MSGID_CONFIG_UNKNOWN_UNACCEPTABLE_REASON));
          }
          else
          {
            Iterator<String> iterator = resultMessages.iterator();

            buffer.append(iterator.next());
            while (iterator.hasNext())
            {
              buffer.append(EOL);
              buffer.append(iterator.next());
            }
          }

          TrustManagerProvider provider =
               loadProvider(className, providerConfig);
          providers.put(providerConfig.dn(), provider);
          DirectoryServer.registerTrustManagerProvider(providerConfig.dn(),
                                                       provider);
        }
        catch (InitializationException ie)
        {
          logError(ErrorLogCategory.CONFIGURATION,
                   ErrorLogSeverity.SEVERE_ERROR,
                   MSGID_CONFIG_TRUSTMANAGER_CANNOT_CREATE_PROVIDER,
                   childEntry.getDN().toString(), buffer.toString());
                   ie.getMessage(), ie.getMessageID());
          continue;
        }
      }
      catch (Exception e)
      {
        logError(ErrorLogCategory.CONFIGURATION, ErrorLogSeverity.SEVERE_ERROR,
                 MSGID_CONFIG_TRUSTMANAGER_CANNOT_CREATE_PROVIDER,
                 childEntry.getDN().toString(), String.valueOf(e));
      }
    }
  }



  /**
   * Indicates whether the configuration entry that will result from a proposed
   * modification is acceptable to this change listener.
   *
   * @param  configEntry         The configuration entry that will result from
   *                             the requested update.
   * @param  unacceptableReason  A buffer to which this method can append a
   *                             human-readable message explaining why the
   *                             proposed change is not acceptable.
   *
   * @return  <CODE>true</CODE> if the proposed entry contains an acceptable
   *          configuration, or <CODE>false</CODE> if it does not.
   * {@inheritDoc}
   */
  public boolean configChangeIsAcceptable(ConfigEntry configEntry,
                                          StringBuilder unacceptableReason)
  public boolean isConfigurationAddAcceptable(TrustManagerCfg configuration,
                                              List<String> unacceptableReasons)
  {
    // Make sure that the entry has an appropriate objectclass for a trust
    // manager provider.
    if (! configEntry.hasObjectClass(OC_TRUST_MANAGER_PROVIDER))
    if (configuration.isEnabled())
    {
      int    msgID   = MSGID_CONFIG_TRUSTMANAGER_INVALID_OBJECTCLASS;
      String message = getMessage(msgID, configEntry.getDN().toString());
      unacceptableReason.append(message);
      return false;
    }


    // Make sure that the entry specifies the provider class name.
    StringConfigAttribute classNameAttr;
    try
    {
      StringConfigAttribute classStub =
           new StringConfigAttribute(ATTR_TRUSTMANAGER_CLASS,
                    getMessage(MSGID_CONFIG_TRUSTMANAGER_DESCRIPTION_CLASS),
                    true, false, true);
      classNameAttr = (StringConfigAttribute)
                      configEntry.getConfigAttribute(classStub);

      if (classNameAttr == null)
      // Get the name of the class and make sure we can instantiate it as a
      // trust manager provider.
      String className = configuration.getJavaImplementationClass();
      try
      {
        int    msgID   = MSGID_CONFIG_TRUSTMANAGER_NO_CLASS_NAME;
        String message = getMessage(msgID, configEntry.getDN().toString());
        unacceptableReason.append(message);
        loadProvider(className, null);
      }
      catch (InitializationException ie)
      {
        unacceptableReasons.add(ie.getMessage());
        return false;
      }
    }
    catch (Exception e)
    {
      if (debugEnabled())
      {
        TRACER.debugCaught(DebugLogLevel.ERROR, e);
      }

      int    msgID   = MSGID_CONFIG_TRUSTMANAGER_INVALID_CLASS_NAME;
      String message = getMessage(msgID, configEntry.getDN().toString(),
                                  String.valueOf(e));
      unacceptableReason.append(message);
      return false;
    }

    Class providerClass;
    try
    {
      providerClass = DirectoryServer.loadClass(classNameAttr.pendingValue());
    }
    catch (Exception e)
    {
      if (debugEnabled())
      {
        TRACER.debugCaught(DebugLogLevel.ERROR, e);
      }

      int    msgID   = MSGID_CONFIG_TRUSTMANAGER_INVALID_CLASS_NAME;
      String message = getMessage(msgID, configEntry.getDN().toString(),
                                  String.valueOf(e));
      unacceptableReason.append(message);
      return false;
    }

    try
    {
      TrustManagerProvider provider =
           (TrustManagerProvider) providerClass.newInstance();
    }
    catch(Exception e)
    {
      if (debugEnabled())
      {
        TRACER.debugCaught(DebugLogLevel.ERROR, e);
      }

      int    msgID   = MSGID_CONFIG_TRUSTMANAGER_INVALID_CLASS;
      String message = getMessage(msgID, providerClass.getName(),
                                  String.valueOf(configEntry.getDN()),
                                  String.valueOf(e));
      unacceptableReason.append(message);
      return false;
    }


    // See if this trust manager provider should be enabled.
    BooleanConfigAttribute enabledAttr;
    try
    {
      BooleanConfigAttribute enabledStub =
           new BooleanConfigAttribute(ATTR_TRUSTMANAGER_ENABLED,
                    getMessage(MSGID_CONFIG_TRUSTMANAGER_DESCRIPTION_ENABLED),
                               false);
      enabledAttr = (BooleanConfigAttribute)
                    configEntry.getConfigAttribute(enabledStub);

      if (enabledAttr == null)
      {
        int    msgID   = MSGID_CONFIG_TRUSTMANAGER_NO_ENABLED_ATTR;
        String message = getMessage(msgID, configEntry.getDN().toString());
        unacceptableReason.append(message);
        return false;
      }
    }
    catch (Exception e)
    {
      if (debugEnabled())
      {
        TRACER.debugCaught(DebugLogLevel.ERROR, e);
      }

      int msgID = MSGID_CONFIG_TRUSTMANAGER_INVALID_ENABLED_VALUE;
      String message = getMessage(msgID, configEntry.getDN().toString(),
                                  String.valueOf(e));
      unacceptableReason.append(message);
      return false;
    }


    // If we've gotten here then the trust manager provider entry appears to be
    // acceptable.
    // If we've gotten here, then it's fine.
    return true;
  }



  /**
   * Attempts to apply a new configuration to this Directory Server component
   * based on the provided changed entry.
   *
   * @param  configEntry  The configuration entry that containing the updated
   *                      configuration for this component.
   *
   * @return  Information about the result of processing the configuration
   *          change.
   * {@inheritDoc}
   */
  public ConfigChangeResult applyConfigurationChange(ConfigEntry configEntry)
  public ConfigChangeResult applyConfigurationAdd(TrustManagerCfg configuration)
  {
    DN                configEntryDN       = configEntry.getDN();
    ResultCode        resultCode          = ResultCode.SUCCESS;
    boolean           adminActionRequired = false;
    ArrayList<String> messages            = new ArrayList<String>();

    configuration.addChangeListener(this);

    // Make sure that the entry has an appropriate objectclass for a trust
    if (! configuration.isEnabled())
    {
      return new ConfigChangeResult(resultCode, adminActionRequired, messages);
    }

    TrustManagerProvider provider = null;

    // Get the name of the class and make sure we can instantiate it as a trust
    // manager provider.
    if (! configEntry.hasObjectClass(OC_TRUST_MANAGER_PROVIDER))
    {
      int msgID = MSGID_CONFIG_TRUSTMANAGER_INVALID_CLASS;
      messages.add(getMessage(msgID, String.valueOf(configEntryDN)));
      resultCode = ResultCode.UNWILLING_TO_PERFORM;
      return new ConfigChangeResult(resultCode, adminActionRequired, messages);
    }


    // Get the corresponding trust manager provider if it is active.
    TrustManagerProvider provider = providers.get(configEntryDN);


    // See if this provider should be enabled or disabled.
    boolean needsEnabled = false;
    BooleanConfigAttribute enabledAttr;
    String className = configuration.getJavaImplementationClass();
    try
    {
      BooleanConfigAttribute enabledStub =
           new BooleanConfigAttribute(ATTR_TRUSTMANAGER_ENABLED,
                    getMessage(MSGID_CONFIG_TRUSTMANAGER_DESCRIPTION_ENABLED),
                    false);
      enabledAttr = (BooleanConfigAttribute)
                    configEntry.getConfigAttribute(enabledStub);

      if (enabledAttr == null)
      {
        int msgID = MSGID_CONFIG_TRUSTMANAGER_NO_ENABLED_ATTR;
        messages.add(getMessage(msgID, String.valueOf(configEntryDN)));
        resultCode = ResultCode.UNWILLING_TO_PERFORM;
        return new ConfigChangeResult(resultCode, adminActionRequired,
                                      messages);
      }

      if (enabledAttr.activeValue())
      {
        if (provider == null)
        {
          needsEnabled = true;
        }
        else
        {
          // The provider is already active, so no action is required.
        }
      }
      else
      {
        if (provider == null)
        {
          // The provider is already disabled, so no action is required and we
          // can short-circuit out of this processing.
          return new ConfigChangeResult(resultCode, adminActionRequired,
                                        messages);
        }
        else
        {
          // The provider is active, so it needs to be disabled.  Do this and
          // return that we were successful.
          providers.remove(configEntryDN);
          DirectoryServer.deregisterTrustManagerProvider(configEntryDN);
          provider.finalizeTrustManagerProvider();
          return new ConfigChangeResult(resultCode, adminActionRequired,
                                        messages);
        }
      }
      provider = loadProvider(className, configuration);
    }
    catch (Exception e)
    catch (InitializationException ie)
    {
      if (debugEnabled())
      if (resultCode == ResultCode.SUCCESS)
      {
        TRACER.debugCaught(DebugLogLevel.ERROR, e);
      }

      int msgID = MSGID_CONFIG_TRUSTMANAGER_INVALID_ENABLED_VALUE;
      messages.add(getMessage(msgID, String.valueOf(configEntryDN),
                              String.valueOf(e)));
      resultCode = DirectoryServer.getServerErrorResultCode();
      return new ConfigChangeResult(resultCode, adminActionRequired, messages);
    }


    // Make sure that the entry specifies the provider class name.  If it has
    // changed, then we will not try to dynamically apply it.
    String className;
    try
    {
      StringConfigAttribute classStub =
           new StringConfigAttribute(ATTR_TRUSTMANAGER_CLASS,
                    getMessage(MSGID_CONFIG_TRUSTMANAGER_DESCRIPTION_CLASS),
                    true, false, true);
      StringConfigAttribute classNameAttr =
           (StringConfigAttribute) configEntry.getConfigAttribute(classStub);

      if (classNameAttr == null)
      {
        int msgID = MSGID_CONFIG_TRUSTMANAGER_NO_CLASS_NAME;
        messages.add(getMessage(msgID, String.valueOf(configEntryDN)));
        resultCode = ResultCode.OBJECTCLASS_VIOLATION;
        return new ConfigChangeResult(resultCode, adminActionRequired,
                                      messages);
      }

      className = classNameAttr.pendingValue();
    }
    catch (Exception e)
    {
      if (debugEnabled())
      {
        TRACER.debugCaught(DebugLogLevel.ERROR, e);
      }

      int msgID = MSGID_CONFIG_TRUSTMANAGER_INVALID_CLASS_NAME;
      messages.add(getMessage(msgID, String.valueOf(configEntryDN),
                              String.valueOf(e)));
      resultCode = DirectoryServer.getServerErrorResultCode();
      return new ConfigChangeResult(resultCode, adminActionRequired, messages);
    }


    boolean classChanged = false;
    String  oldClassName = null;
    if (provider != null)
    {
      oldClassName = provider.getClass().getName();
      classChanged = (! className.equals(oldClassName));
    }


    if (classChanged)
    {
      // This will not be applied dynamically.  Add a message to the response
      // and indicate that admin action is required.
      adminActionRequired = true;
      messages.add(getMessage(MSGID_CONFIG_TRUSTMANAGER_CLASS_ACTION_REQUIRED,
                              String.valueOf(oldClassName),
                              String.valueOf(className),
                              String.valueOf(configEntryDN)));
      return new ConfigChangeResult(resultCode, adminActionRequired, messages);
    }


    if (needsEnabled)
    {
      try
      {
        Class providerClass = DirectoryServer.loadClass(className);
        provider = (TrustManagerProvider) providerClass.newInstance();
      }
      catch (Exception e)
      {
        if (debugEnabled())
        {
          TRACER.debugCaught(DebugLogLevel.ERROR, e);
        }

        int msgID = MSGID_CONFIG_TRUSTMANAGER_INVALID_CLASS;
        messages.add(getMessage(msgID, className,
                                String.valueOf(configEntryDN),
                                String.valueOf(e)));
        resultCode = DirectoryServer.getServerErrorResultCode();
        return new ConfigChangeResult(resultCode, adminActionRequired,
                                      messages);
      }

      try
      {
        provider.initializeTrustManagerProvider(configEntry);
      }
      catch (Exception e)
      {
        if (debugEnabled())
        {
          TRACER.debugCaught(DebugLogLevel.ERROR, e);
        }

        int msgID = MSGID_CONFIG_TRUSTMANAGER_INITIALIZATION_FAILED;
        messages.add(getMessage(msgID, className,
                                String.valueOf(configEntryDN),
                                String.valueOf(e)));
        resultCode = DirectoryServer.getServerErrorResultCode();
        return new ConfigChangeResult(resultCode, adminActionRequired,
                                      messages);
      }


      providers.put(configEntryDN, provider);
      DirectoryServer.registerTrustManagerProvider(configEntryDN, provider);
      return new ConfigChangeResult(resultCode, adminActionRequired, messages);
      messages.add(ie.getMessage());
    }

    if (resultCode == ResultCode.SUCCESS)
    {
      providers.put(configuration.dn(), provider);
      DirectoryServer.registerTrustManagerProvider(configuration.dn(),
                                                   provider);
    }

    // If we've gotten here, then there haven't been any changes to anything
    // that we care about.
    return new ConfigChangeResult(resultCode, adminActionRequired, messages);
  }



  /**
   * Indicates whether the configuration entry that will result from a proposed
   * add is acceptable to this add listener.
   *
   * @param  configEntry         The configuration entry that will result from
   *                             the requested add.
   * @param  unacceptableReason  A buffer to which this method can append a
   *                             human-readable message explaining why the
   *                             proposed entry is not acceptable.
   *
   * @return  <CODE>true</CODE> if the proposed entry contains an acceptable
   *          configuration, or <CODE>false</CODE> if it does not.
   * {@inheritDoc}
   */
  public boolean configAddIsAcceptable(ConfigEntry configEntry,
                                       StringBuilder unacceptableReason)
  public boolean isConfigurationDeleteAcceptable(TrustManagerCfg configuration,
                      List<String> unacceptableReasons)
  {
    // Make sure that no entry already exists with the specified DN.
    DN configEntryDN = configEntry.getDN();
    if (providers.containsKey(configEntryDN))
    {
      int    msgID   = MSGID_CONFIG_TRUSTMANAGER_EXISTS;
      String message = getMessage(msgID, String.valueOf(configEntryDN));
      unacceptableReason.append(message);
      return false;
    }


    // Make sure that the entry has an appropriate objectclass for a trust
    // manager provider.
    if (! configEntry.hasObjectClass(OC_TRUST_MANAGER_PROVIDER))
    {
      int    msgID   = MSGID_CONFIG_TRUSTMANAGER_INVALID_OBJECTCLASS;
      String message = getMessage(msgID, configEntry.getDN().toString());
      unacceptableReason.append(message);
      return false;
    }


    // Make sure that the entry specifies the trust manager provider class.
    StringConfigAttribute classNameAttr;
    try
    {
      StringConfigAttribute classStub =
           new StringConfigAttribute(ATTR_TRUSTMANAGER_CLASS,
                    getMessage(MSGID_CONFIG_TRUSTMANAGER_DESCRIPTION_CLASS),
                    true, false, true);
      classNameAttr = (StringConfigAttribute)
                      configEntry.getConfigAttribute(classStub);

      if (classNameAttr == null)
      {
        int msgID = MSGID_CONFIG_TRUSTMANAGER_NO_CLASS_NAME;
        String message = getMessage(msgID, configEntry.getDN().toString());
        unacceptableReason.append(message);
        return false;
      }
    }
    catch (Exception e)
    {
      if (debugEnabled())
      {
        TRACER.debugCaught(DebugLogLevel.ERROR, e);
      }

      int msgID = MSGID_CONFIG_TRUSTMANAGER_INVALID_CLASS_NAME;
      String message = getMessage(msgID, configEntry.getDN().toString(),
                                  String.valueOf(e));
      unacceptableReason.append(message);
      return false;
    }

    Class providerClass;
    try
    {
      providerClass = DirectoryServer.loadClass(classNameAttr.pendingValue());
    }
    catch (Exception e)
    {
      if (debugEnabled())
      {
        TRACER.debugCaught(DebugLogLevel.ERROR, e);
      }

      int msgID = MSGID_CONFIG_TRUSTMANAGER_INVALID_CLASS_NAME;
      String message = getMessage(msgID, configEntry.getDN().toString(),
                                  String.valueOf(e));
      unacceptableReason.append(message);
      return false;
    }

    TrustManagerProvider provider;
    try
    {
      provider = (TrustManagerProvider) providerClass.newInstance();
    }
    catch (Exception e)
    {
      if (debugEnabled())
      {
        TRACER.debugCaught(DebugLogLevel.ERROR, e);
      }

      int msgID = MSGID_CONFIG_TRUSTMANAGER_INVALID_CLASS;
      String message = getMessage(msgID, providerClass.getName(),
                                  String.valueOf(configEntryDN),
                                  String.valueOf(e));
      unacceptableReason.append(message);
      return false;
    }


    // See if this provider should be enabled.
    BooleanConfigAttribute enabledAttr;
    try
    {
      BooleanConfigAttribute enabledStub =
           new BooleanConfigAttribute(ATTR_TRUSTMANAGER_ENABLED,
                    getMessage(MSGID_CONFIG_TRUSTMANAGER_DESCRIPTION_ENABLED),
                               false);
      enabledAttr = (BooleanConfigAttribute)
                    configEntry.getConfigAttribute(enabledStub);

      if (enabledAttr == null)
      {
        int msgID = MSGID_CONFIG_TRUSTMANAGER_NO_ENABLED_ATTR;
        String message = getMessage(msgID, configEntry.getDN().toString());
        unacceptableReason.append(message);
        return false;
      }
      else if (! enabledAttr.pendingValue())
      {
        // The trust manager provider is not enabled, so we don't need to do any
        // further validation.
        return true;
      }
    }
    catch (Exception e)
    {
      if (debugEnabled())
      {
        TRACER.debugCaught(DebugLogLevel.ERROR, e);
      }

      int msgID = MSGID_CONFIG_TRUSTMANAGER_INVALID_ENABLED_VALUE;
      String message = getMessage(msgID, configEntry.getDN().toString(),
                                  String.valueOf(e));
      unacceptableReason.append(message);
      return false;
    }


    // If the provider is a configurable component, then make sure that its
    // configuration is valid.
    if (provider instanceof ConfigurableComponent)
    {
      ConfigurableComponent cc = (ConfigurableComponent) provider;
      LinkedList<String> errorMessages = new LinkedList<String>();
      if (! cc.hasAcceptableConfiguration(configEntry, errorMessages))
      {
        if (errorMessages.isEmpty())
        {
          int msgID = MSGID_CONFIG_TRUSTMANAGER_UNACCEPTABLE_CONFIG;
          unacceptableReason.append(getMessage(msgID,
                                               String.valueOf(configEntryDN)));
        }
        else
        {
          Iterator<String> iterator = errorMessages.iterator();
          unacceptableReason.append(iterator.next());
          while (iterator.hasNext())
          {
            unacceptableReason.append("  ");
            unacceptableReason.append(iterator.next());
          }
        }

        return false;
      }
    }


    // If we've gotten here then the provider entry appears to be acceptable.
    // FIXME -- We should try to perform some check to determine whether the
    // provider is in use.
    return true;
  }



  /**
   * Attempts to apply a new configuration based on the provided added entry.
   *
   * @param  configEntry  The new configuration entry that contains the
   *                      configuration to apply.
   *
   * @return  Information about the result of processing the configuration
   *          change.
   * {@inheritDoc}
   */
  public ConfigChangeResult applyConfigurationAdd(ConfigEntry configEntry)
  public ConfigChangeResult applyConfigurationDelete(
                                 TrustManagerCfg configuration)
  {
    DN                configEntryDN       = configEntry.getDN();
    ResultCode        resultCode          = ResultCode.SUCCESS;
    boolean           adminActionRequired = false;
    ArrayList<String> messages            = new ArrayList<String>();

    DirectoryServer.deregisterTrustManagerProvider(configuration.dn());

    // Make sure that the entry has an appropriate objectclass for a trust
    // manager provider.
    if (! configEntry.hasObjectClass(OC_TRUST_MANAGER_PROVIDER))
    {
      int    msgID   = MSGID_CONFIG_TRUSTMANAGER_INVALID_OBJECTCLASS;
      messages.add(getMessage(msgID, String.valueOf(configEntryDN)));
      resultCode = ResultCode.UNWILLING_TO_PERFORM;
      return new ConfigChangeResult(resultCode, adminActionRequired, messages);
    }


    // See if this provider should be enabled or disabled.
    BooleanConfigAttribute enabledAttr;
    try
    {
      BooleanConfigAttribute enabledStub =
           new BooleanConfigAttribute(ATTR_TRUSTMANAGER_ENABLED,
                    getMessage(MSGID_CONFIG_TRUSTMANAGER_DESCRIPTION_ENABLED),
                               false);
      enabledAttr = (BooleanConfigAttribute)
                    configEntry.getConfigAttribute(enabledStub);

      if (enabledAttr == null)
      {
        // The attribute doesn't exist, so it will be disabled by default.
        int msgID = MSGID_CONFIG_TRUSTMANAGER_NO_ENABLED_ATTR;
        messages.add(getMessage(msgID, String.valueOf(configEntryDN)));
        resultCode = ResultCode.SUCCESS;
        return new ConfigChangeResult(resultCode, adminActionRequired,
                                      messages);
      }
      else if (! enabledAttr.activeValue())
      {
        // It is explicitly configured as disabled, so we don't need to do
        // anything.
        return new ConfigChangeResult(resultCode, adminActionRequired,
                                      messages);
      }
    }
    catch (Exception e)
    {
      if (debugEnabled())
      {
        TRACER.debugCaught(DebugLogLevel.ERROR, e);
      }

      int msgID = MSGID_CONFIG_TRUSTMANAGER_INVALID_ENABLED_VALUE;
      messages.add(getMessage(msgID, String.valueOf(configEntryDN),
                              String.valueOf(e)));
      resultCode = DirectoryServer.getServerErrorResultCode();
      return new ConfigChangeResult(resultCode, adminActionRequired, messages);
    }


    // Make sure that the entry specifies the provider class name.
    String className;
    try
    {
      StringConfigAttribute classStub =
           new StringConfigAttribute(ATTR_TRUSTMANAGER_CLASS,
                    getMessage(MSGID_CONFIG_TRUSTMANAGER_DESCRIPTION_CLASS),
                    true, false, true);
      StringConfigAttribute classNameAttr =
           (StringConfigAttribute) configEntry.getConfigAttribute(classStub);

      if (classNameAttr == null)
      {
        int msgID = MSGID_CONFIG_TRUSTMANAGER_NO_CLASS_NAME;
        messages.add(getMessage(msgID, String.valueOf(configEntryDN)));
        resultCode = ResultCode.OBJECTCLASS_VIOLATION;
        return new ConfigChangeResult(resultCode, adminActionRequired,
                                      messages);
      }

      className = classNameAttr.pendingValue();
    }
    catch (Exception e)
    {
      if (debugEnabled())
      {
        TRACER.debugCaught(DebugLogLevel.ERROR, e);
      }

      int msgID = MSGID_CONFIG_TRUSTMANAGER_INVALID_CLASS_NAME;
      messages.add(getMessage(msgID, String.valueOf(configEntryDN),
                              String.valueOf(e)));
      resultCode = DirectoryServer.getServerErrorResultCode();
      return new ConfigChangeResult(resultCode, adminActionRequired, messages);
    }


    // Load and initialize the provider class, and register it with the
    // Directory Server.
    TrustManagerProvider provider;
    try
    {
      Class providerClass = DirectoryServer.loadClass(className);
      provider = (TrustManagerProvider) providerClass.newInstance();
    }
    catch (Exception e)
    {
      if (debugEnabled())
      {
        TRACER.debugCaught(DebugLogLevel.ERROR, e);
      }

      int msgID = MSGID_CONFIG_TRUSTMANAGER_INVALID_CLASS;
      messages.add(getMessage(msgID, className, String.valueOf(configEntryDN),
                              String.valueOf(e)));
      resultCode = DirectoryServer.getServerErrorResultCode();
      return new ConfigChangeResult(resultCode, adminActionRequired, messages);
    }

    try
    {
      provider.initializeTrustManagerProvider(configEntry);
    }
    catch (Exception e)
    {
      if (debugEnabled())
      {
        TRACER.debugCaught(DebugLogLevel.ERROR, e);
      }

      int msgID = MSGID_CONFIG_TRUSTMANAGER_INITIALIZATION_FAILED;
      messages.add(getMessage(msgID, className, String.valueOf(configEntryDN),
                              String.valueOf(e)));
      resultCode = DirectoryServer.getServerErrorResultCode();
      return new ConfigChangeResult(resultCode, adminActionRequired, messages);
    }


    providers.put(configEntryDN, provider);
    DirectoryServer.registerTrustManagerProvider(configEntryDN, provider);
    return new ConfigChangeResult(resultCode, adminActionRequired, messages);
  }



  /**
   * Indicates whether it is acceptable to remove the provided configuration
   * entry.
   *
   * @param  configEntry         The configuration entry that will be removed
   *                             from the configuration.
   * @param  unacceptableReason  A buffer to which this method can append a
   *                             human-readable message explaining why the
   *                             proposed delete is not acceptable.
   *
   * @return  <CODE>true</CODE> if the proposed entry may be removed from the
   *          configuration, or <CODE>false</CODE> if not.
   */
  public boolean configDeleteIsAcceptable(ConfigEntry configEntry,
                                          StringBuilder unacceptableReason)
  {
    // A delete should always be acceptable, so just return true.
    return true;
  }



  /**
   * Attempts to apply a new configuration based on the provided deleted entry.
   *
   * @param  configEntry  The new configuration entry that has been deleted.
   *
   * @return  Information about the result of processing the configuration
   *          change.
   */
  public ConfigChangeResult applyConfigurationDelete(ConfigEntry configEntry)
  {
    DN         configEntryDN       = configEntry.getDN();
    ResultCode resultCode          = ResultCode.SUCCESS;
    boolean    adminActionRequired = false;


    // See if the entry is registered as a trust manager provider.  If so,
    // deregister it and stop the provider.
    TrustManagerProvider provider = providers.remove(configEntryDN);
    TrustManagerProvider provider = providers.remove(configuration.dn());
    if (provider != null)
    {
      DirectoryServer.deregisterTrustManagerProvider(configEntryDN);
      provider.finalizeTrustManagerProvider();
    }

    return new ConfigChangeResult(resultCode, adminActionRequired, messages);
  }

    return new ConfigChangeResult(resultCode, adminActionRequired);


  /**
   * {@inheritDoc}
   */
  public boolean isConfigurationChangeAcceptable(TrustManagerCfg configuration,
                      List<String> unacceptableReasons)
  {
    if (configuration.isEnabled())
    {
      // Get the name of the class and make sure we can instantiate it as a
      // trust manager provider.
      String className = configuration.getJavaImplementationClass();
      try
      {
        loadProvider(className, null);
      }
      catch (InitializationException ie)
      {
        unacceptableReasons.add(ie.getMessage());
        return false;
      }
    }

    // If we've gotten here, then it's fine.
    return true;
  }



  /**
   * {@inheritDoc}
   */
  public ConfigChangeResult applyConfigurationChange(
                                 TrustManagerCfg configuration)
  {
    ResultCode        resultCode          = ResultCode.SUCCESS;
    boolean           adminActionRequired = false;
    ArrayList<String> messages            = new ArrayList<String>();


    // Get the existing provider if it's already enabled.
    TrustManagerProvider existingProvider = providers.get(configuration.dn());


    // If the new configuration has the provider disabled, then disable it if it
    // is enabled, or do nothing if it's already disabled.
    if (! configuration.isEnabled())
    {
      if (existingProvider != null)
      {
        DirectoryServer.deregisterTrustManagerProvider(configuration.dn());

        TrustManagerProvider provider = providers.remove(configuration.dn());
        if (provider != null)
        {
          provider.finalizeTrustManagerProvider();
        }
      }

      return new ConfigChangeResult(resultCode, adminActionRequired, messages);
    }


    // Get the class for the trust manager provider.  If the provider is already
    // enabled, then we shouldn't do anything with it although if the class has
    // changed then we'll at least need to indicate that administrative action
    // is required.  If the provider is disabled, then instantiate the class and
    // initialize and register it as a trust manager provider.
    String className = configuration.getJavaImplementationClass();
    if (existingProvider != null)
    {
      if (! className.equals(existingProvider.getClass().getName()))
      {
        adminActionRequired = true;
      }

      return new ConfigChangeResult(resultCode, adminActionRequired, messages);
    }

    TrustManagerProvider provider = null;
    try
    {
      provider = loadProvider(className, configuration);
    }
    catch (InitializationException ie)
    {
      if (resultCode == ResultCode.SUCCESS)
      {
        resultCode = DirectoryServer.getServerErrorResultCode();
      }

      messages.add(ie.getMessage());
    }

    if (resultCode == ResultCode.SUCCESS)
    {
      providers.put(configuration.dn(), provider);
      DirectoryServer.registerTrustManagerProvider(configuration.dn(),
                                                   provider);
    }

    return new ConfigChangeResult(resultCode, adminActionRequired, messages);
  }



  /**
   * Loads the specified class, instantiates it as a trust manager provider, and
   * optionally initializes that instance.
   *
   * @param  className      The fully-qualified name of the trust manager
   *                        provider class to load, instantiate, and initialize.
   * @param  configuration  The configuration to use to initialize the trust
   *                        manager provider, or {@code null} if the provider
   *                        should not be initialized.
   *
   * @return  The possibly initialized trust manager provider.
   *
   * @throws  InitializationException  If a problem occurred while attempting to
   *                                   initialize the trust manager provider.
   */
  private TrustManagerProvider loadProvider(String className,
                                            TrustManagerCfg configuration)
          throws InitializationException
  {
    try
    {
      TrustManagerCfgDefn definition = TrustManagerCfgDefn.getInstance();
      ClassPropertyDefinition propertyDefinition =
           definition.getJavaImplementationClassPropertyDefinition();
      Class<? extends TrustManagerProvider> providerClass =
           propertyDefinition.loadClass(className, TrustManagerProvider.class);
      TrustManagerProvider provider = providerClass.newInstance();

      if (configuration != null)
      {
        Method method =
             provider.getClass().getMethod("initializeTrustManagerProvider",
                  configuration.definition().getServerConfigurationClass());
        method.invoke(provider, configuration);
      }

      return provider;
    }
    catch (Exception e)
    {
      int msgID = MSGID_CONFIG_TRUSTMANAGER_INITIALIZATION_FAILED;
      String message = getMessage(msgID, className,
                                  String.valueOf(configuration.dn()),
                                  stackTraceToSingleLineString(e));
      throw new InitializationException(msgID, message, e);
    }
  }
}