/*
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* The contents of this file are subject to the terms of the Common Development and
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* Distribution License (the License). You may not use this file except in compliance with the
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* License.
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*
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* You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
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* specific language governing permission and limitations under the License.
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*
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* When distributing Covered Software, include this CDDL Header Notice in each file and include
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* the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
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* Header, with the fields enclosed by brackets [] replaced by your own identifying
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* information: "Portions Copyright [year] [name of copyright owner]".
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*
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* Copyright 2006-2008 Sun Microsystems, Inc.
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* Portions Copyright 2014-2016 ForgeRock AS.
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*/
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package org.opends.server.plugins;
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import java.io.IOException;
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import java.util.List;
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import java.util.Set;
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import org.forgerock.i18n.LocalizableMessage;
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import org.forgerock.opendj.config.server.ConfigException;
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import org.forgerock.opendj.io.ASN1;
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import org.forgerock.opendj.io.ASN1Reader;
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import org.forgerock.opendj.io.ASN1Writer;
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import org.forgerock.opendj.ldap.ResultCode;
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import org.forgerock.opendj.ldap.ByteString;
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import org.opends.server.admin.std.server.PluginCfg;
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import org.opends.server.api.plugin.DirectoryServerPlugin;
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import org.opends.server.api.plugin.PluginResult;
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import org.opends.server.api.plugin.PluginType;
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import org.opends.server.controls.ControlDecoder;
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import org.opends.server.types.CanceledOperationException;
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import org.opends.server.types.Control;
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import org.opends.server.types.DirectoryException;
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import org.opends.server.types.operation.*;
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import org.opends.server.util.CollectionUtils;
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/**
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* This class defines a very simple pre-operation plugin that sleeps for up to
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* five seconds for add, compare, delete, extended, modify, modify DN, and
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* search operations (and therefore not for abandon, bind, and unbind
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* operations, since those operations cannot be cancelled). While it is
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* sleeping, it also checks for a request to cancel the associated operation and
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* will respond to it accordingly.
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*/
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public class DelayPreOpPlugin
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extends DirectoryServerPlugin<PluginCfg>
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{
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/**
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* The OID for the delay request control, which is used to flag operations
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* that should be delayed.
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*/
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public static final String OID_DELAY_REQUEST = "1.3.6.1.4.1.26027.1.999.1";
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/**
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* The control used by this plugin.
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*/
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public static class DelayRequestControl extends Control
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{
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/**
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* ControlDecoder implementation to decode this control from a ByteString.
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*/
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private static final class Decoder
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implements ControlDecoder<DelayRequestControl>
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{
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/** {@inheritDoc} */
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@Override
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public DelayRequestControl decode(boolean isCritical, ByteString value)
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throws DirectoryException
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{
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ASN1Reader reader = ASN1.getReader(value);
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try
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{
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long delay = reader.readInteger();
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return new DelayRequestControl(isCritical, delay);
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}
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catch (Exception e)
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{
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// TODO: Need a better message
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throw new DirectoryException(ResultCode.PROTOCOL_ERROR, null, e);
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}
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}
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@Override
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public String getOID()
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{
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return OID_DELAY_REQUEST;
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}
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}
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/**
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* The Control Decoder that can be used to decode this control.
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*/
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public static final ControlDecoder<DelayRequestControl> DECODER =
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new Decoder();
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private long delayDuration;
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/**
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* Constructs a new control of this class.
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*
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* @param isCritical
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* Indicates whether support for this control should be considered
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* a critical part of the server processing.
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* @param delayDuration
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* The requested delay duration.
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*/
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public DelayRequestControl(boolean isCritical, long delayDuration)
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{
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super(OID_DELAY_REQUEST, isCritical);
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this.delayDuration = delayDuration;
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}
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/**
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* Writes this control's value to an ASN.1 writer. The value (if any)
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* must be written as an ASN1OctetString.
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*
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* @param writer The ASN.1 writer to use.
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* @throws IOException If a problem occurs while writing to the stream.
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*/
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@Override
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protected void writeValue(ASN1Writer writer) throws IOException {
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writer.writeStartSequence(ASN1.UNIVERSAL_OCTET_STRING_TYPE);
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writer.writeInteger(delayDuration);
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writer.writeEndSequence();
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}
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/**
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* Retrieves the delay duration.
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*
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* @return The delay duration.
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*/
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public long getDelayDuration()
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{
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return delayDuration;
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}
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}
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/**
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* Creates a new instance of this Directory Server plugin. Every
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* plugin must implement a default constructor (it is the only one
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* that will be used to create plugins defined in the
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* configuration), and every plugin constructor must call
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* <CODE>super()</CODE> as its first element.
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*/
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public DelayPreOpPlugin()
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{
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super();
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}
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/** {@inheritDoc} */
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@Override
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public void initializePlugin(Set<PluginType> pluginTypes,
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PluginCfg configuration)
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throws ConfigException
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{
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// This plugin may only be used as a pre-operation plugin.
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for (PluginType t : pluginTypes)
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{
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switch (t)
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{
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case PRE_OPERATION_ADD:
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case PRE_OPERATION_BIND:
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case PRE_OPERATION_COMPARE:
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case PRE_OPERATION_DELETE:
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case PRE_OPERATION_EXTENDED:
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case PRE_OPERATION_MODIFY:
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case PRE_OPERATION_MODIFY_DN:
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case PRE_OPERATION_SEARCH:
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// This is fine.
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break;
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default:
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throw new ConfigException(LocalizableMessage.raw("Invalid plugin type " + t +
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" for delay pre-op plugin."));
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}
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}
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}
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/** {@inheritDoc} */
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@Override
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public PluginResult.PreOperation
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doPreOperation(PreOperationAddOperation addOperation)
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throws CanceledOperationException {
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return doPreOperationInternal(addOperation);
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}
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/** {@inheritDoc} */
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@Override
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public PluginResult.PreOperation
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doPreOperation(PreOperationBindOperation bindOperation)
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{
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try
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{
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return doPreOperationInternal(bindOperation);
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}
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catch(CanceledOperationException coe)
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{
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// Bind ops can't be canceled. Just ignore.
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return PluginResult.PreOperation.continueOperationProcessing();
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}
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}
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/** {@inheritDoc} */
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@Override
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public PluginResult.PreOperation
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doPreOperation(PreOperationCompareOperation compareOperation)
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throws CanceledOperationException {
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return doPreOperationInternal(compareOperation);
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}
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/** {@inheritDoc} */
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@Override
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public PluginResult.PreOperation
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doPreOperation(PreOperationDeleteOperation deleteOperation)
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throws CanceledOperationException {
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return doPreOperationInternal(deleteOperation);
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}
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/** {@inheritDoc} */
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@Override
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public PluginResult.PreOperation
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doPreOperation(PreOperationExtendedOperation extendedOperation)
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throws CanceledOperationException {
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return doPreOperationInternal(extendedOperation);
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}
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/** {@inheritDoc} */
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@Override
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public PluginResult.PreOperation
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doPreOperation(PreOperationModifyOperation modifyOperation)
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throws CanceledOperationException {
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return doPreOperationInternal(modifyOperation);
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}
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/** {@inheritDoc} */
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@Override
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public PluginResult.PreOperation
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doPreOperation(PreOperationModifyDNOperation modifyDNOperation)
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throws CanceledOperationException {
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return doPreOperationInternal(modifyDNOperation);
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}
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/** {@inheritDoc} */
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@Override
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public PluginResult.PreOperation
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doPreOperation(PreOperationSearchOperation searchOperation)
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throws CanceledOperationException {
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return doPreOperationInternal(searchOperation);
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}
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/**
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* Looks for a delay request control in the operation, and if one is found
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* then sleep in 10 millisecond increments up to the length of time specified
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* in the control value. If the operation receives a cancel request during
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* this time, then the control will stop sleeping immediately.
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*
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* @param operation The operation to be processed.
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*
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* @return The result of the plugin processing.
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*/
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private PluginResult.PreOperation
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doPreOperationInternal(PreOperationOperation operation)
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throws CanceledOperationException
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{
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DelayRequestControl control;
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try
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{
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control = operation.getRequestControl(DelayRequestControl.DECODER);
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}
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catch (Exception e)
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{
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return PluginResult.PreOperation.stopProcessing(
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ResultCode.PROTOCOL_ERROR,
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LocalizableMessage.raw("Unable to decode the delay request control: " +
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e));
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}
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if(control != null)
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{
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long delayDuration = control.getDelayDuration();
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if (delayDuration <= 0)
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{
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return PluginResult.PreOperation.continueOperationProcessing();
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}
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long stopSleepTime = System.currentTimeMillis() + delayDuration;
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while (System.currentTimeMillis() < stopSleepTime)
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{
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operation.checkIfCanceled(false);
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try
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{
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Thread.sleep(10);
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} catch (Exception e) {}
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}
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}
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return PluginResult.PreOperation.continueOperationProcessing();
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}
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/**
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* Creates a delay request control with the specified delay.
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*
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* @param delay The length of time in milliseconds to sleep.
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*
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* @return The appropriate delay request control.
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*/
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public static Control createDelayControl(long delay)
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{
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return new DelayRequestControl(false, delay);
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}
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/**
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* Retrieves a list containing a delay request LDAP control with the specified
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* delay.
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*
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* @param delay The length of time in milliseconds to sleep.
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*
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* @return A list containing the appropriate delay request LDAP control.
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*/
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public static List<Control> createDelayControlList(long delay)
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{
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Control c = new DelayRequestControl(false, delay);
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return CollectionUtils.newArrayList(c);
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}
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}
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