/*
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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 2006-2009 Sun Microsystems, Inc.
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*/
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package org.opends.server.replication.protocol;
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import java.io.UnsupportedEncodingException;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.zip.DataFormatException;
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import org.opends.server.protocols.asn1.ASN1;
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import org.opends.server.protocols.asn1.ASN1Exception;
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import org.opends.server.protocols.asn1.ASN1Reader;
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import org.opends.server.protocols.asn1.ASN1Writer;
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import org.opends.server.protocols.internal.InternalClientConnection;
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import org.opends.server.protocols.ldap.LDAPAttribute;
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import org.opends.server.replication.common.AssuredMode;
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import org.opends.server.replication.common.ChangeNumber;
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import org.opends.server.types.AbstractOperation;
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import org.opends.server.types.Attribute;
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import org.opends.server.types.ByteSequenceReader;
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import org.opends.server.types.ByteString;
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import org.opends.server.types.ByteStringBuilder;
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import org.opends.server.types.LDAPException;
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import org.opends.server.types.RawAttribute;
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import org.opends.server.types.operation.PostOperationAddOperation;
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import org.opends.server.types.operation.PostOperationDeleteOperation;
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import org.opends.server.types.operation.PostOperationModifyDNOperation;
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import org.opends.server.types.operation.PostOperationModifyOperation;
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import org.opends.server.types.operation.PostOperationOperation;
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/**
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* Abstract class that must be extended to define a message
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* used for sending Updates between servers.
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*/
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public abstract class LDAPUpdateMsg extends UpdateMsg
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{
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/**
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* The DN on which the update was originally done.
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*/
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protected String dn = null;
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/**
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* The uniqueId of the entry that was updated.
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*/
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protected String uniqueId;
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/**
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* Encoded form of the LDAPUpdateMsg.
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*/
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protected byte[] bytes = null;
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/**
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* Encoded form of entry attributes.
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*/
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protected byte[] encodedEclIncludes = new byte[0];
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/**
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* Creates a new UpdateMsg.
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*/
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public LDAPUpdateMsg()
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{
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}
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/**
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* Creates a new UpdateMsg with the given informations.
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*
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* @param ctx The replication Context of the operation for which the
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* update message must be created,.
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* @param dn The DN of the entry on which the change
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* that caused the creation of this object happened
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*/
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public LDAPUpdateMsg(OperationContext ctx, String dn)
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{
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this.protocolVersion = ProtocolVersion.getCurrentVersion();
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this.changeNumber = ctx.getChangeNumber();
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this.uniqueId = ctx.getEntryUid();
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this.dn = dn;
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}
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/**
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* Creates a new UpdateMessage with the given informations.
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*
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* @param cn The ChangeNumber of the operation for which the
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* UpdateMessage is created.
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* @param entryUUID The Unique identifier of the entry that is updated
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* by the operation for which the UpdateMessage is created.
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* @param dn The DN of the entry on which the change
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* that caused the creation of this object happened
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*/
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public LDAPUpdateMsg(ChangeNumber cn, String entryUUID, String dn)
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{
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this.protocolVersion = ProtocolVersion.getCurrentVersion();
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this.changeNumber = cn;
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this.uniqueId = entryUUID;
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this.dn = dn;
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}
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/**
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* Generates an Update Message with the provided information.
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*
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* @param op The operation for which the message must be created.
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* @return The generated message.
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*/
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public static LDAPUpdateMsg generateMsg(PostOperationOperation op)
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{
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LDAPUpdateMsg msg = null;
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switch (op.getOperationType())
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{
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case MODIFY :
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msg = new ModifyMsg((PostOperationModifyOperation) op);
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break;
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case ADD:
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msg = new AddMsg((PostOperationAddOperation) op);
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break;
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case DELETE :
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msg = new DeleteMsg((PostOperationDeleteOperation) op);
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break;
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case MODIFY_DN :
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msg = new ModifyDNMsg( (PostOperationModifyDNOperation) op);
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break;
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}
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return msg;
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}
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/**
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* Get the DN on which the operation happened.
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*
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* @return The DN on which the operations happened.
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*/
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public String getDn()
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{
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return dn;
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}
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/**
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* Set the DN.
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* @param dn The dn that must now be used for this message.
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*/
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public void setDn(String dn)
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{
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this.dn = dn;
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}
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/**
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* Get the Unique Identifier of the entry on which the operation happened.
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*
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* @return The Unique Identifier of the entry on which the operation happened.
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*/
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public String getUniqueId()
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{
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return uniqueId;
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}
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/**
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* Create and Operation from the message.
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*
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* @param conn connection to use when creating the message
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* @return the created Operation
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* @throws LDAPException In case of LDAP decoding exception.
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* @throws ASN1Exception In case of ASN1 decoding exception.
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* @throws DataFormatException In case of bad msg format.
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*/
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public AbstractOperation createOperation(InternalClientConnection conn)
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throws LDAPException, ASN1Exception, DataFormatException
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{
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return createOperation(conn, dn);
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}
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/**
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* Create and Operation from the message using the provided DN.
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*
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* @param conn connection to use when creating the message.
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* @param newDn the DN to use when creating the operation.
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* @return the created Operation.
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* @throws LDAPException In case of LDAP decoding exception.
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* @throws ASN1Exception In case of ASN1 decoding exception.
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* @throws DataFormatException In case of bad msg format.
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*/
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public abstract AbstractOperation createOperation(
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InternalClientConnection conn, String newDn)
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throws LDAPException, ASN1Exception, DataFormatException;
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// ============
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// Msg encoding
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// ============
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/**
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* Do all the work necessary for the encoding.
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*
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* This is useful in case when one wants to perform this outside
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* of a synchronized portion of code.
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*
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* This method is not synchronized and therefore not MT safe.
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*
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* @throws UnsupportedEncodingException when encoding fails.
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*/
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public void encode() throws UnsupportedEncodingException
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{
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bytes = getBytes();
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}
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/**
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* Encode the common header for all the UpdateMsg. This uses the current
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* protocol version.
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*
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* @param type the type of UpdateMsg to encode.
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* @param additionalLength additional length needed to encode the remaining
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* part of the UpdateMsg.
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* @return a byte array containing the common header and enough space to
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* encode the remaining bytes of the UpdateMsg as was specified
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* by the additionalLength.
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* (byte array length = common header length + additionalLength)
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* @throws UnsupportedEncodingException if UTF-8 is not supported.
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*/
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public byte[] encodeHeader(byte type, int additionalLength)
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throws UnsupportedEncodingException
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{
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byte[] byteDn = dn.getBytes("UTF-8");
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byte[] changeNumberByte =
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this.getChangeNumber().toString().getBytes("UTF-8");
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byte[] byteEntryuuid = getUniqueId().getBytes("UTF-8");
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/* The message header is stored in the form :
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* <operation type><protocol version><changenumber><dn><entryuuid><assured>
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* <assured mode> <safe data level>
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* the length of result byte array is therefore :
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* 1 + 1 + change number length + 1 + dn length + 1 + uuid length + 1 + 1
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* + 1 + 1 + additional_length
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*/
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int length = 8 + changeNumberByte.length + byteDn.length
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+ byteEntryuuid.length + additionalLength;
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byte[] encodedMsg = new byte[length];
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/* put the type of the operation */
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encodedMsg[0] = type;
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/* put the protocol version */
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encodedMsg[1] = (byte)ProtocolVersion.getCurrentVersion();
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int pos = 2;
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/* Put the ChangeNumber */
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pos = addByteArray(changeNumberByte, encodedMsg, pos);
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/* Put the DN and a terminating 0 */
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pos = addByteArray(byteDn, encodedMsg, pos);
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/* Put the entry uuid and a terminating 0 */
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pos = addByteArray(byteEntryuuid, encodedMsg, pos);
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/* Put the assured flag */
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encodedMsg[pos++] = (assuredFlag ? (byte) 1 : 0);
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/* Put the assured mode */
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encodedMsg[pos++] = assuredMode.getValue();
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/* Put the safe data level */
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encodedMsg[pos++] = safeDataLevel;
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return encodedMsg;
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}
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/**
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* Encode the common header for all the UpdateMessage. This uses the version
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* 1 of the replication protocol (used for compatibility purpose).
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*
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* @param type the type of UpdateMessage to encode.
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* @param additionalLength additional length needed to encode the remaining
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* part of the UpdateMessage.
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* @return a byte array containing the common header and enough space to
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* encode the remaining bytes of the UpdateMessage as was specified
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* by the additionalLength.
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* (byte array length = common header length + additionalLength)
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* @throws UnsupportedEncodingException if UTF-8 is not supported.
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*/
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public byte[] encodeHeader_V1(byte type, int additionalLength)
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throws UnsupportedEncodingException
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{
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byte[] byteDn = dn.getBytes("UTF-8");
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byte[] changeNumberByte =
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this.getChangeNumber().toString().getBytes("UTF-8");
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byte[] byteEntryuuid = getUniqueId().getBytes("UTF-8");
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/* The message header is stored in the form :
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* <operation type><changenumber><dn><assured><entryuuid><change>
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* the length of result byte array is therefore :
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* 1 + change number length + 1 + dn length + 1 + 1 +
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* uuid length + 1 + additional_length
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*/
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int length = 5 + changeNumberByte.length + byteDn.length
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+ byteEntryuuid.length + additionalLength;
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byte[] encodedMsg = new byte[length];
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/* put the type of the operation */
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encodedMsg[0] = type;
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int pos = 1;
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/* put the ChangeNumber */
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pos = addByteArray(changeNumberByte, encodedMsg, pos);
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/* put the assured information */
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encodedMsg[pos++] = (assuredFlag ? (byte) 1 : 0);
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/* put the DN and a terminating 0 */
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pos = addByteArray(byteDn, encodedMsg, pos);
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/* put the entry uuid and a terminating 0 */
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pos = addByteArray(byteEntryuuid, encodedMsg, pos);
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return encodedMsg;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public byte[] getBytes()
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throws UnsupportedEncodingException
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{
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// Encode in the current protocol version
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if (bytes == null)
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{
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// this is the current version of the protocol
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bytes = getBytes_V4();
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}
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return bytes;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public byte[] getBytes(short reqProtocolVersion)
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throws UnsupportedEncodingException
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{
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if (reqProtocolVersion == ProtocolVersion.REPLICATION_PROTOCOL_V1)
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{
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return getBytes_V1();
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}
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else if (reqProtocolVersion <= ProtocolVersion.REPLICATION_PROTOCOL_V3)
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{
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return getBytes_V23();
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}
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else
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{
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// Encode in the current protocol version
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if (bytes == null)
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{
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// this is the current version of the protocol
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bytes = getBytes_V4();
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}
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return bytes;
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}
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}
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/**
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* Get the byte array representation of this Message. This uses the version
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* 1 of the replication protocol (used for compatibility purpose).
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*
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* @return The byte array representation of this Message.
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*
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* @throws UnsupportedEncodingException When the encoding of the message
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* failed because the UTF-8 encoding is not supported.
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*/
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public abstract byte[] getBytes_V1() throws UnsupportedEncodingException;
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/**
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* Get the byte array representation of this Message. This uses the version
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* 2 of the replication protocol (used for compatibility purpose).
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*
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* @return The byte array representation of this Message.
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*
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* @throws UnsupportedEncodingException When the encoding of the message
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* failed because the UTF-8 encoding is not supported.
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*/
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public abstract byte[] getBytes_V23() throws UnsupportedEncodingException;
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/**
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* Get the byte array representation of this Message. This uses the version
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* 4 of the replication protocol (used for compatibility purpose).
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*
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* @return The byte array representation of this Message.
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*
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* @throws UnsupportedEncodingException When the encoding of the message
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* failed because the UTF-8 encoding is not supported.
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*/
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public abstract byte[] getBytes_V4() throws UnsupportedEncodingException;
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/**
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* Encode a list of attributes.
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*/
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static private byte[] encodeAttributes(List<Attribute> attributes)
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{
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if (attributes==null)
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return new byte[0];
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try
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{
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ByteStringBuilder byteBuilder = new ByteStringBuilder();
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ASN1Writer writer = ASN1.getWriter(byteBuilder);
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for (Attribute a : attributes)
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{
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new LDAPAttribute(a).write(writer);
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}
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return byteBuilder.toByteArray();
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}
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catch (Exception e)
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{
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return null;
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}
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}
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// ============
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// Msg decoding
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// ============
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/**
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* Decode the Header part of this Update Message, and check its type.
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*
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* @param types The allowed types of this Update Message.
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* @param encodedMsg the encoded form of the UpdateMsg.
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* @return the position at which the remaining part of the message starts.
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* @throws DataFormatException if the encodedMsg does not contain a valid
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* common header.
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*/
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public int decodeHeader(byte[] types, byte[] encodedMsg)
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throws DataFormatException
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{
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/* first byte is the type */
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boolean foundMatchingType = false;
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for (int i = 0; i < types.length; i++)
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{
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if (types[i] == encodedMsg[0])
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{
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foundMatchingType = true;
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break;
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}
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}
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if (!foundMatchingType)
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throw new DataFormatException("byte[] is not a valid update msg: "
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+ encodedMsg[0]);
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/*
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* For older protocol version PDUs, decode the matching version header
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* instead.
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*/
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if ((encodedMsg[0] == MSG_TYPE_ADD_V1) ||
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(encodedMsg[0] == MSG_TYPE_DELETE_V1) ||
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(encodedMsg[0] == MSG_TYPE_MODIFYDN_V1) ||
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(encodedMsg[0] == MSG_TYPE_MODIFY_V1))
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{
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return decodeHeader_V1(encodedMsg);
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}
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/* read the protocol version */
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protocolVersion = (short)encodedMsg[1];
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try
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{
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/* Read the changeNumber */
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int pos = 2;
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int length = getNextLength(encodedMsg, pos);
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String changenumberStr = new String(encodedMsg, pos, length, "UTF-8");
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pos += length + 1;
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changeNumber = new ChangeNumber(changenumberStr);
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/* Read the dn */
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length = getNextLength(encodedMsg, pos);
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dn = new String(encodedMsg, pos, length, "UTF-8");
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pos += length + 1;
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/* Read the entryuuid */
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length = getNextLength(encodedMsg, pos);
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uniqueId = new String(encodedMsg, pos, length, "UTF-8");
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pos += length + 1;
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/* Read the assured information */
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if (encodedMsg[pos++] == 1)
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assuredFlag = true;
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else
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assuredFlag = false;
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/* Read the assured mode */
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assuredMode = AssuredMode.valueOf(encodedMsg[pos++]);
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/* Read the safe data level */
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safeDataLevel = encodedMsg[pos++];
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return pos;
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} catch (UnsupportedEncodingException e)
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{
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throw new DataFormatException("UTF-8 is not supported by this jvm.");
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} catch (IllegalArgumentException e)
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{
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throw new DataFormatException(e.getMessage());
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}
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}
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/**
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* Decode the Header part of this Update Message, and check its type. This
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* uses the version 1 of the replication protocol (used for compatibility
|
* purpose).
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*
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* @param encodedMsg the encoded form of the UpdateMessage.
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* @return the position at which the remaining part of the message starts.
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* @throws DataFormatException if the encodedMsg does not contain a valid
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* common header.
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*/
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public int decodeHeader_V1(byte[] encodedMsg)
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throws DataFormatException
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{
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if ((encodedMsg[0] != MSG_TYPE_ADD_V1) &&
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(encodedMsg[0] != MSG_TYPE_DELETE_V1) &&
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(encodedMsg[0] != MSG_TYPE_MODIFYDN_V1) &&
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(encodedMsg[0] != MSG_TYPE_MODIFY_V1))
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throw new DataFormatException("byte[] is not a valid update msg: expected"
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+ " a V1 PDU, received: " + encodedMsg[0]);
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// Force version to V1 (other new parameters take their default values
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// (assured stuff...))
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protocolVersion = ProtocolVersion.REPLICATION_PROTOCOL_V1;
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try
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{
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/* read the changeNumber */
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int pos = 1;
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int length = getNextLength(encodedMsg, pos);
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String changenumberStr = new String(encodedMsg, pos, length, "UTF-8");
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pos += length + 1;
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changeNumber = new ChangeNumber(changenumberStr);
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/* read the assured information */
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if (encodedMsg[pos++] == 1)
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assuredFlag = true;
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else
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assuredFlag = false;
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/* read the dn */
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length = getNextLength(encodedMsg, pos);
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dn = new String(encodedMsg, pos, length, "UTF-8");
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pos += length + 1;
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/* read the entryuuid */
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length = getNextLength(encodedMsg, pos);
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uniqueId = new String(encodedMsg, pos, length, "UTF-8");
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pos += length + 1;
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return pos;
|
} catch (UnsupportedEncodingException e)
|
{
|
throw new DataFormatException("UTF-8 is not supported by this jvm.");
|
}
|
}
|
|
/**
|
* Return the number of bytes used by this message.
|
*
|
* @return The number of bytes used by this message.
|
*/
|
public abstract int size();
|
|
/**
|
* Return the number of bytes used by the header.
|
* @return The number of bytes used by the header.
|
*/
|
protected int headerSize()
|
{
|
return 100; // 100 let's assume header size is 100
|
}
|
|
/**
|
* Set a provided list of entry attributes.
|
* @param entryAttrs The provided list of entry attributes.
|
*/
|
public void setEclIncludes(List<Attribute> entryAttrs)
|
{
|
this.encodedEclIncludes = encodeAttributes(entryAttrs);
|
}
|
|
/**
|
* Returns the list of entry attributes.
|
* @return The list of entry attributes.
|
*/
|
public ArrayList<RawAttribute> getEclIncludes()
|
{
|
try
|
{
|
return decodeRawAttributes(this.encodedEclIncludes);
|
}
|
catch(Exception e)
|
{
|
return null;
|
}
|
}
|
|
/**
|
* Decode a provided byte array as a list of RawAttribute.
|
* @param in The provided byte array.
|
* @return The list of Rawattribute objects.
|
* @throws LDAPException when it occurs.
|
* @throws ASN1Exception when it occurs.
|
*/
|
public ArrayList<RawAttribute> decodeRawAttributes(byte[] in)
|
throws LDAPException, ASN1Exception
|
{
|
ArrayList<RawAttribute> rattr = new ArrayList<RawAttribute>();
|
try
|
{
|
ByteSequenceReader reader =
|
ByteString.wrap(in).asReader();
|
ASN1Reader asn1Reader = ASN1.getReader(reader);
|
// loop on attributes
|
while(asn1Reader.hasNextElement())
|
{
|
rattr.add(LDAPAttribute.decode(asn1Reader));
|
}
|
return rattr;
|
}
|
catch(Exception e)
|
{
|
return null;
|
}
|
}
|
|
/**
|
* Decode a provided byte array as a list of Attribute.
|
* @param in The provided byte array.
|
* @return The list of Attribute objects.
|
* @throws LDAPException when it occurs.
|
* @throws ASN1Exception when it occurs.
|
*/
|
public ArrayList<Attribute> decodeAttributes(byte[] in)
|
throws LDAPException, ASN1Exception
|
{
|
ArrayList<Attribute> lattr = new ArrayList<Attribute>();
|
try
|
{
|
ByteSequenceReader reader =
|
ByteString.wrap(in).asReader();
|
ASN1Reader asn1Reader = ASN1.getReader(reader);
|
// loop on attributes
|
while(asn1Reader.hasNextElement())
|
{
|
lattr.add(LDAPAttribute.decode(asn1Reader).toAttribute());
|
}
|
return lattr;
|
}
|
catch(Exception e)
|
{
|
return null;
|
}
|
}
|
}
|
