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The UnboundID LDAP SDK for Java is a fast, comprehensive, and easy-to-use
Java API for communicating with LDAP directory servers and performing
related tasks like reading and writing LDIF, encoding and decoding data
using base64 and ASN.1 BER, and performing secure communication. This
package contains the Standard Edition of the LDAP SDK, which is a
complete, general-purpose library for communicating with LDAPv3 directory
servers.
/*
* Copyright 2008-2018 Ping Identity Corporation
* All Rights Reserved.
*/
/*
* Copyright (C) 2015-2018 Ping Identity Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (GPLv2 only)
* or the terms of the GNU Lesser General Public License (LGPLv2.1 only)
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see .
*/
package com.unboundid.ldap.sdk.unboundidds.extensions;
import com.unboundid.asn1.ASN1Element;
import com.unboundid.asn1.ASN1OctetString;
import com.unboundid.asn1.ASN1Sequence;
import com.unboundid.ldap.sdk.Control;
import com.unboundid.ldap.sdk.ExtendedRequest;
import com.unboundid.ldap.sdk.ExtendedResult;
import com.unboundid.ldap.sdk.LDAPConnection;
import com.unboundid.ldap.sdk.LDAPException;
import com.unboundid.ldap.sdk.ResultCode;
import com.unboundid.ldap.sdk.unboundidds.controls.
InteractiveTransactionSpecificationRequestControl;
import com.unboundid.util.Debug;
import com.unboundid.util.NotMutable;
import com.unboundid.util.StaticUtils;
import com.unboundid.util.ThreadSafety;
import com.unboundid.util.ThreadSafetyLevel;
import static com.unboundid.ldap.sdk.unboundidds.extensions.ExtOpMessages.*;
/**
*
* NOTE: The use of interactive transactions is discouraged because it
* can create conditions which are prone to deadlocks between operations that
* may result in the cancellation of one or both operations. It is strongly
* recommended that standard LDAP transactions (which may be started using a
* {@link com.unboundid.ldap.sdk.extensions.StartTransactionExtendedRequest})
* or a multi-update extended operation be used instead. Although they cannot
* include arbitrary read operations, LDAP transactions and multi-update
* operations may be used in conjunction with the
* {@link com.unboundid.ldap.sdk.controls.AssertionRequestControl},
* {@link com.unboundid.ldap.sdk.controls.PreReadRequestControl}, and
* {@link com.unboundid.ldap.sdk.controls.PostReadRequestControl} to
* incorporate some read capability into a transaction, and in conjunction
* with the {@link com.unboundid.ldap.sdk.ModificationType#INCREMENT}
* modification type to increment integer values without the need to know the
* precise value before or after the operation (although the pre-read and/or
* post-read controls may be used to determine that).
*
* This class provides an implementation of the start interactive transaction
* extended request. It may be used to begin a transaction that allows multiple
* operations to be processed as a single atomic unit. Interactive transactions
* may include read operations, in which case it is guaranteed that no
* operations outside of the transaction will be allowed to access the
* associated entries until the transaction has been committed or aborted. The
* {@link StartInteractiveTransactionExtendedResult} that is returned will
* include a a transaction ID, which should be included in each operation that
* is part of the transaction using the
* {@link InteractiveTransactionSpecificationRequestControl}. After all
* requests for the transaction have been submitted to the server, the
* {@link EndInteractiveTransactionExtendedRequest} should be used to
* commit that transaction, or it may also be used to abort the transaction if
* it is decided that it is no longer needed.
*
*
* NOTE: This class, and other classes within the
* {@code com.unboundid.ldap.sdk.unboundidds} package structure, are only
* supported for use against Ping Identity, UnboundID, and
* Nokia/Alcatel-Lucent 8661 server products. These classes provide support
* for proprietary functionality or for external specifications that are not
* considered stable or mature enough to be guaranteed to work in an
* interoperable way with other types of LDAP servers.
*
*
* The start transaction extended request may include an element which indicates
* the base DN below which all operations will be attempted. This may be used
* to allow the Directory Server to tailor the transaction to the appropriate
* backend.
*
* Whenever the client sends a start interactive transaction request to the
* server, the {@link StartInteractiveTransactionExtendedResult} that is
* returned will include a transaction ID that may be used to identify the
* transaction for all operations which are to be performed as part of the
* transaction. This transaction ID should be included in a
* {@link InteractiveTransactionSpecificationRequestControl} attached to each
* request that is to be processed as part of the transaction. When the
* transaction has completed, the
* {@link EndInteractiveTransactionExtendedRequest} may be used to commit it,
* and it may also be used at any time to abort the transaction if it is no
* longer needed.
* Example
* The following example demonstrates the process for creating an interactive
* transaction, processing multiple requests as part of that transaction, and
* then commits the transaction.
*
* // Start the interactive transaction and get the transaction ID.
* StartInteractiveTransactionExtendedRequest startTxnRequest =
* new StartInteractiveTransactionExtendedRequest("dc=example,dc=com");
* StartInteractiveTransactionExtendedResult startTxnResult =
* (StartInteractiveTransactionExtendedResult)
* connection.processExtendedOperation(startTxnRequest);
* if (startTxnResult.getResultCode() != ResultCode.SUCCESS)
* {
* throw new LDAPException(startTxnResult);
* }
* ASN1OctetString txnID = startTxnResult.getTransactionID();
*
* // At this point, we have a valid transaction. We want to ensure that the
* // transaction is aborted if any failure occurs, so do that in a
* // try-finally block.
* boolean txnFailed = true;
* try
* {
* // Perform a search to find all users in the "Sales" department.
* SearchRequest searchRequest = new SearchRequest("dc=example,dc=com",
* SearchScope.SUB, Filter.createEqualityFilter("ou", "Sales"));
* searchRequest.addControl(
* new InteractiveTransactionSpecificationRequestControl(txnID, true,
* true));
*
* SearchResult searchResult = connection.search(searchRequest);
* if (searchResult.getResultCode() != ResultCode.SUCCESS)
* {
* throw new LDAPException(searchResult);
* }
*
* // Iterate through all of the users and assign a new fax number to each
* // of them.
* for (SearchResultEntry e : searchResult.getSearchEntries())
* {
* ModifyRequest modifyRequest = new ModifyRequest(e.getDN(),
* new Modification(ModificationType.REPLACE,
* "facsimileTelephoneNumber", "+1 123 456 7890"));
* modifyRequest.addControl(
* new InteractiveTransactionSpecificationRequestControl(txnID, true,
*
* true));
* connection.modify(modifyRequest);
* }
*
* // Commit the transaction.
* ExtendedResult endTxnResult = connection.processExtendedOperation(
* new EndInteractiveTransactionExtendedRequest(txnID, true));
* if (endTxnResult.getResultCode() == ResultCode.SUCCESS)
* {
* txnFailed = false;
* }
* }
* finally
* {
* if (txnFailed)
* {
* connection.processExtendedOperation(
* new EndInteractiveTransactionExtendedRequest(txnID, false));
* }
* }
*
*/
@NotMutable()
@ThreadSafety(level=ThreadSafetyLevel.NOT_THREADSAFE)
public final class StartInteractiveTransactionExtendedRequest
extends ExtendedRequest
{
/**
* The OID (1.3.6.1.4.1.30221.2.6.3) for the start interactive transaction
* extended request.
*/
public static final String START_INTERACTIVE_TRANSACTION_REQUEST_OID =
"1.3.6.1.4.1.30221.2.6.3";
/**
* The BER type for the {@code baseDN} element of the request.
*/
private static final byte TYPE_BASE_DN = (byte) 0x80;
/**
* The serial version UID for this serializable class.
*/
private static final long serialVersionUID = 4475028061132753546L;
// The base DN for this request, if specified.
private final String baseDN;
/**
* Creates a new start interactive transaction extended request with no base
* DN.
*/
public StartInteractiveTransactionExtendedRequest()
{
super(START_INTERACTIVE_TRANSACTION_REQUEST_OID);
baseDN = null;
}
/**
* Creates a new start interactive transaction extended request.
*
* @param baseDN The base DN to use for the request. It may be {@code null}
* if no base DN should be provided.
*/
public StartInteractiveTransactionExtendedRequest(final String baseDN)
{
super(START_INTERACTIVE_TRANSACTION_REQUEST_OID, encodeValue(baseDN));
this.baseDN = baseDN;
}
/**
* Creates a new start interactive transaction extended request.
*
* @param baseDN The base DN to use for the request. It may be
* {@code null} if no base DN should be provided.
* @param controls The set of controls to include in the request.
*/
public StartInteractiveTransactionExtendedRequest(final String baseDN,
final Control[] controls)
{
super(START_INTERACTIVE_TRANSACTION_REQUEST_OID, encodeValue(baseDN),
controls);
this.baseDN = baseDN;
}
/**
* Creates a new start interactive transaction extended request from the
* provided generic extended request.
*
* @param extendedRequest The generic extended request to use to create this
* start interactive transaction extended request.
*
* @throws LDAPException If a problem occurs while decoding the request.
*/
public StartInteractiveTransactionExtendedRequest(
final ExtendedRequest extendedRequest)
throws LDAPException
{
super(extendedRequest);
if (! extendedRequest.hasValue())
{
baseDN = null;
return;
}
String baseDNStr = null;
try
{
final ASN1Element valueElement =
ASN1Element.decode(extendedRequest.getValue().getValue());
final ASN1Sequence valueSequence =
ASN1Sequence.decodeAsSequence(valueElement);
for (final ASN1Element e : valueSequence.elements())
{
if (e.getType() == TYPE_BASE_DN)
{
baseDNStr = ASN1OctetString.decodeAsOctetString(e).stringValue();
}
else
{
throw new LDAPException(ResultCode.DECODING_ERROR,
ERR_START_INT_TXN_REQUEST_INVALID_ELEMENT.get(
StaticUtils.toHex(e.getType())));
}
}
}
catch (final LDAPException le)
{
Debug.debugException(le);
throw le;
}
catch (final Exception e)
{
Debug.debugException(e);
throw new LDAPException(ResultCode.DECODING_ERROR,
ERR_START_INT_TXN_REQUEST_VALUE_NOT_SEQUENCE.get(e.getMessage()), e);
}
baseDN = baseDNStr;
}
/**
* Encodes the provided information into an ASN.1 octet string suitable for
* use as the value of this extended request.
*
* @param baseDN The base DN to use for the request. It may be {@code null}
* if no base DN should be provided.
*
* @return The ASN.1 octet string containing the encoded value, or
* {@code null} if no value should be used.
*/
private static ASN1OctetString encodeValue(final String baseDN)
{
if (baseDN == null)
{
return null;
}
final ASN1Element[] elements =
{
new ASN1OctetString(TYPE_BASE_DN, baseDN)
};
return new ASN1OctetString(new ASN1Sequence(elements).encode());
}
/**
* Retrieves the base DN for this start interactive transaction extended
* request, if available.
*
* @return The base DN for this start interactive transaction extended
* request, or {@code null} if none was provided.
*/
public String getBaseDN()
{
return baseDN;
}
/**
* {@inheritDoc}
*/
@Override()
public StartInteractiveTransactionExtendedResult process(
final LDAPConnection connection, final int depth)
throws LDAPException
{
final ExtendedResult extendedResponse = super.process(connection, depth);
return new StartInteractiveTransactionExtendedResult(extendedResponse);
}
/**
* {@inheritDoc}
*/
@Override()
public StartInteractiveTransactionExtendedRequest duplicate()
{
return duplicate(getControls());
}
/**
* {@inheritDoc}
*/
@Override()
public StartInteractiveTransactionExtendedRequest duplicate(
final Control[] controls)
{
final StartInteractiveTransactionExtendedRequest r =
new StartInteractiveTransactionExtendedRequest(baseDN, controls);
r.setResponseTimeoutMillis(getResponseTimeoutMillis(null));
return r;
}
/**
* {@inheritDoc}
*/
@Override()
public String getExtendedRequestName()
{
return INFO_EXTENDED_REQUEST_NAME_START_INTERACTIVE_TXN.get();
}
/**
* {@inheritDoc}
*/
@Override()
public void toString(final StringBuilder buffer)
{
buffer.append("StartInteractiveTransactionExtendedRequest(");
if (baseDN != null)
{
buffer.append("baseDN='");
buffer.append(baseDN);
buffer.append('\'');
}
final Control[] controls = getControls();
if (controls.length > 0)
{
if (baseDN != null)
{
buffer.append(", ");
}
buffer.append("controls={");
for (int i=0; i < controls.length; i++)
{
if (i > 0)
{
buffer.append(", ");
}
buffer.append(controls[i]);
}
buffer.append('}');
}
buffer.append(')');
}
}
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