/*
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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.extensions;
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import org.opends.messages.Message;
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import org.opends.messages.MessageBuilder;
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import org.opends.server.admin.std.server.CancelExtendedOperationHandlerCfg;
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import org.opends.server.api.ClientConnection;
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import org.opends.server.api.ExtendedOperationHandler;
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import org.opends.server.config.ConfigException;
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import org.opends.server.core.DirectoryServer;
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import org.opends.server.core.ExtendedOperation;
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import org.opends.server.loggers.debug.DebugTracer;
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import org.opends.server.protocols.asn1.ASN1Sequence;
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import org.opends.server.types.ByteString;
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import org.opends.server.types.CancelRequest;
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import org.opends.server.types.CancelResult;
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import org.opends.server.types.DebugLogLevel;
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import org.opends.server.types.InitializationException;
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import org.opends.server.types.ResultCode;
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import static org.opends.messages.ExtensionMessages.*;
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import static org.opends.server.loggers.debug.DebugLogger.*;
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import static org.opends.server.util.ServerConstants.*;
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import static org.opends.server.util.StaticUtils.*;
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/**
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* This class implements the LDAP cancel extended operation defined in RFC 3909.
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* It is similar to the LDAP abandon operation, with the exception that it
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* requires a response for both the operation that is cancelled and the cancel
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* request (whereas an abandon request never has a response, and if it is
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* successful the abandoned operation won't get one either).
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*/
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public class CancelExtendedOperation
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extends ExtendedOperationHandler<CancelExtendedOperationHandlerCfg>
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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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/**
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* Create an instance of this cancel extended operation. All initialization
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* should be performed in the <CODE>initializeExtendedOperationHandler</CODE>
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* method.
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*/
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public CancelExtendedOperation()
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{
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super();
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}
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/**
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* Initializes this extended operation handler based on the information in the
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* provided configuration entry. It should also register itself with the
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* Directory Server for the particular kinds of extended operations that it
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* will process.
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*
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* @param config The configuration that contains the information
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* to use to initialize this extended operation handler.
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*
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* @throws ConfigException If an unrecoverable problem arises in the
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* process of performing the initialization.
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*
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* @throws InitializationException If a problem occurs during initialization
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* that is not related to the server
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* configuration.
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*/
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public void initializeExtendedOperationHandler(
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CancelExtendedOperationHandlerCfg config)
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throws ConfigException, InitializationException
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{
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// No special configuration is required.
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DirectoryServer.registerSupportedExtension(OID_CANCEL_REQUEST, this);
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registerControlsAndFeatures();
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}
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/**
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* Performs any finalization that may be necessary for this extended
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* operation handler. By default, no finalization is performed.
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*/
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public void finalizeExtendedOperationHandler()
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{
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DirectoryServer.deregisterSupportedExtension(OID_CANCEL_REQUEST);
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deregisterControlsAndFeatures();
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}
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/**
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* Processes the provided extended operation.
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*
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* @param operation The extended operation to be processed.
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*/
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public void processExtendedOperation(ExtendedOperation operation)
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{
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// The value of the request must be a sequence containing an integer element
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// that holds the message ID of the operation to cancel. If there is no
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// value or it cannot be decoded, then fail.
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int idToCancel;
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ByteString requestValue = operation.getRequestValue();
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if (requestValue == null)
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{
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operation.setResultCode(ResultCode.PROTOCOL_ERROR);
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operation.appendErrorMessage(ERR_EXTOP_CANCEL_NO_REQUEST_VALUE.get());
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return;
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}
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else
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{
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try
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{
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ASN1Sequence valueSequence =
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ASN1Sequence.decodeAsSequence(requestValue.value());
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idToCancel =
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valueSequence.elements().get(0).decodeAsInteger().intValue();
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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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operation.setResultCode(ResultCode.PROTOCOL_ERROR);
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Message message = ERR_EXTOP_CANCEL_CANNOT_DECODE_REQUEST_VALUE.get(
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getExceptionMessage(e));
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operation.appendErrorMessage(message);
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return;
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}
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}
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// Create the cancel request for the target operation.
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Message cancelReason =
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INFO_EXTOP_CANCEL_REASON.get(operation.getMessageID());
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MessageBuilder cancelResultMessage = new MessageBuilder();
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CancelRequest cancelRequest = new CancelRequest(true, cancelReason,
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cancelResultMessage);
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// Get the client connection and attempt the cancel.
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ClientConnection clientConnection = operation.getClientConnection();
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CancelResult cancelResult = clientConnection.cancelOperation(idToCancel,
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cancelRequest);
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// Update the result of the extended operation and return.
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operation.setResultCode(cancelResult.getResultCode());
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operation.setErrorMessage(cancelResultMessage);
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}
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}
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