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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 Commercial Edition of the LDAP SDK, which includes all of the general-purpose functionality contained in the Standard Edition, plus additional functionality specific to UnboundID server products.

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/*
 * Copyright 2008-2016 UnboundID Corp.
 * All Rights Reserved.
 */
/*
 * Copyright (C) 2008-2016 UnboundID Corp.
 *
 * 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;



import java.util.concurrent.atomic.AtomicBoolean;
import java.util.logging.Level;

import com.unboundid.ldap.protocol.LDAPResponse;
import com.unboundid.util.DebugType;
import com.unboundid.util.InternalUseOnly;
import com.unboundid.util.StaticUtils;

import static com.unboundid.ldap.sdk.LDAPMessages.*;
import static com.unboundid.util.Debug.*;



/**
 * This class provides a helper class used for processing asynchronous add,
 * delete, modify, and modify DN operations.
 */
@InternalUseOnly()
final class AsyncHelper
      implements CommonAsyncHelper, IntermediateResponseListener
{
  /**
   * The serial version UID for this serializable class.
   */
  private static final long serialVersionUID = 7186731025240177443L;



  // The async request ID created for the associated operation.
  private final AsyncRequestID asyncRequestID;

  // The async result listener to be notified when the response arrives.
  private final AsyncResultListener resultListener;

  // Indicates whether the final response has been returned.
  private final AtomicBoolean responseReturned;

  // The BER type for the operation with which this helper is associated.
  private final OperationType operationType;

  // The intermediate response listener to be notified of any intermediate
  // response messages received.
  private final IntermediateResponseListener intermediateResponseListener;

  // The connection with which this async helper is associated.
  private final LDAPConnection connection;

  // The time that this async helper was created.
  private final long createTime;



  /**
   * Creates a new instance of this async helper that will be used to forward
   * decoded results to the provided async result listener.
   *
   * @param  connection                    The connection with which this async
   *                                       helper is associated.
   * @param  operationType                 The operation type for the associated
   *                                       operation.
   * @param  messageID                     The message ID for the associated
   *                                       operation.
   * @param  resultListener                The async result listener to be
   *                                       notified when the response arrives.
   * @param  intermediateResponseListener  The intermediate response listener to
   *                                       be notified of any intermediate
   *                                       response messages received.
   */
  @InternalUseOnly()
  AsyncHelper(final LDAPConnection connection,
              final OperationType operationType, final int messageID,
              final AsyncResultListener resultListener,
              final IntermediateResponseListener intermediateResponseListener)
  {
    this.connection                   = connection;
    this.operationType                = operationType;
    this.resultListener               = resultListener;
    this.intermediateResponseListener = intermediateResponseListener;

    asyncRequestID   = new AsyncRequestID(messageID, connection);
    responseReturned = new AtomicBoolean(false);
    createTime       = System.nanoTime();
  }



  /**
   * {@inheritDoc}
   */
  public AsyncRequestID getAsyncRequestID()
  {
    return asyncRequestID;
  }



  /**
   * {@inheritDoc}
   */
  public LDAPConnection getConnection()
  {
    return connection;
  }



  /**
   * {@inheritDoc}
   */
  public long getCreateTimeNanos()
  {
    return createTime;
  }



  /**
   * {@inheritDoc}
   */
  public OperationType getOperationType()
  {
    return operationType;
  }



  /**
   * {@inheritDoc}
   */
  @InternalUseOnly()
  public void responseReceived(final LDAPResponse response)
         throws LDAPException
  {
    if (! responseReturned.compareAndSet(false, true))
    {
      return;
    }

    final long responseTime = System.nanoTime() - createTime;

    final LDAPResult result;
    if (response instanceof ConnectionClosedResponse)
    {
      final ConnectionClosedResponse ccr = (ConnectionClosedResponse) response;
      final String msg = ccr.getMessage();
      if (msg == null)
      {
        result = new LDAPResult(asyncRequestID.getMessageID(),
             ccr.getResultCode(),
             ERR_CONN_CLOSED_WAITING_FOR_ASYNC_RESPONSE.get(), null,
             StaticUtils.NO_STRINGS, StaticUtils.NO_CONTROLS);
      }
      else
      {
        result = new LDAPResult(asyncRequestID.getMessageID(),
             ccr.getResultCode(),
             ERR_CONN_CLOSED_WAITING_FOR_ASYNC_RESPONSE_WITH_MESSAGE.get(msg),
             null, StaticUtils.NO_STRINGS, StaticUtils.NO_CONTROLS);
      }
    }
    else
    {
      result = (LDAPResult) response;
    }

    switch (operationType)
    {
      case ADD:
        connection.getConnectionStatistics().incrementNumAddResponses(
             responseTime);
        break;
      case DELETE:
        connection.getConnectionStatistics().incrementNumDeleteResponses(
             responseTime);
        break;
      case MODIFY:
        connection.getConnectionStatistics().incrementNumModifyResponses(
             responseTime);
        break;
      case MODIFY_DN:
        connection.getConnectionStatistics().incrementNumModifyDNResponses(
             responseTime);
        break;
    }

    resultListener.ldapResultReceived(asyncRequestID, result);
    asyncRequestID.setResult(result);
  }



  /**
   * {@inheritDoc}
   */
  @InternalUseOnly()
  public void intermediateResponseReturned(
                   final IntermediateResponse intermediateResponse)
  {
    if (intermediateResponseListener == null)
    {
      debug(Level.WARNING, DebugType.LDAP,
            WARN_INTERMEDIATE_RESPONSE_WITH_NO_LISTENER.get(
                 String.valueOf(intermediateResponse)));
    }
    else
    {
      intermediateResponseListener.intermediateResponseReturned(
           intermediateResponse);
    }
  }
}