/*
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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 2009 Sun Microsystems, Inc.
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*/
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package org.opends.sdk;
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import java.io.Closeable;
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import org.opends.sdk.requests.*;
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import org.opends.sdk.responses.*;
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/**
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* An asynchronous connection with a Directory Server over which read
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* and update operations may be performed. See RFC 4511 for the LDAPv3
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* protocol specification and more information about the types of
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* operations defined in LDAP.
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* <p>
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* <h3>Operation processing</h3>
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* <p>
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* All operations are performed asynchronously and return a
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* {@link ResultFuture} or sub-type thereof which can be used for
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* retrieving the result using the {@link ResultFuture#get} method.
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* Operation failures, for whatever reason, are signalled by the
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* {@link ResultFuture#get()} method throwing an
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* {@link ErrorResultException}.
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* <p>
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* Synchronous operations are easily simulated by immediately getting
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* the result:
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*
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* <pre>
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* Connection connection = ...;
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* AddRequest request = ...;
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* // Will block until operation completes, and
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* // throws exception on failure.
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* connection.add(request).get();
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* </pre>
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*
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* Operations can be performed in parallel while taking advantage of the
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* simplicity of a synchronous application design:
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*
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* <pre>
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* Connection connection1 = ...;
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* Connection connection2 = ...;
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* AddRequest request = ...;
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* // Add the entry to the first server (don't block).
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* ResultFuture future1 = connection1.add(request);
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* // Add the entry to the second server (in parallel).
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* ResultFuture future2 = connection2.add(request);
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* // Total time = is O(1) instead of O(n).
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* future1.get();
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* future2.get();
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* </pre>
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*
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* More complex client applications can take advantage of a fully
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* asynchronous event driven design using {@link ResultHandler}s:
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*
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* <pre>
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* Connection connection = ...;
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* SearchRequest request = ...;
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* // Process results in the search result handler
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* // in a separate thread.
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* SearchResponseHandler handle = ...;
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* connection.search(request, handler);
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* </pre>
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* <p>
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* <h3>Closing connections</h3>
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* <p>
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* Applications must ensure that a connection is closed by calling
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* {@link #close()} even if a fatal error occurs on the connection. Once
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* a connection has been closed by the client application, any attempts
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* to continue to use the connection will result in an
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* {@link IllegalStateException} being thrown. Note that, if a fatal
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* error is encountered on the connection, then the application can
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* continue to use the connection. In this case all requests subsequent
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* to the failure will fail with an appropriate
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* {@link ErrorResultException} when their result is retrieved.
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* <p>
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* <h3>Event notification</h3>
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* <p>
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* Applications can choose to be notified when a connection is closed by
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* the application, receives an unsolicited notification, or experiences
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* a fatal error by registering a {@link ConnectionEventListener} with
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* the connection using the {@link #addConnectionEventListener} method.
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* <p>
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* <h3>TO DO</h3>
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* <p>
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* <ul>
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* <li>do we need isClosed() and isValid()?
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* <li>do we need connection event notification of client close? JDBC
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* and JCA have this functionality in their pooled (managed) connection
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* APIs. We need some form of event notification at the app level for
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* unsolicited notifications.
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* <li>method for performing update operation (e.g. LDIF change
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* records).
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* <li>should unsupported methods throw UnsupportedOperationException or
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* throw an ErrorResultException using an UnwillingToPerform result code
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* (or something similar)?
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* <li>Implementations should indicate whether or not they are thread
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* safe and support concurrent requests.
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* </ul>
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*
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* @see <a href="http://tools.ietf.org/html/rfc4511">RFC 4511 -
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* Lightweight Directory Access Protocol (LDAP): The Protocol </a>
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*/
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public interface AsynchronousConnection extends Closeable
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{
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/**
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* Abandons the unfinished operation identified in the provided
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* abandon request.
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* <p>
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* <b>Note:</b> a more convenient approach to abandoning unfinished
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* operations is provided via the {@link ResultFuture#cancel(boolean)}
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* method.
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*
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* @param request
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* The request identifying the operation to be abandoned.
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* @throws UnsupportedOperationException
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* If this connection does not support abandon operations.
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* @throws IllegalStateException
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* If this connection has already been closed, i.e. if
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* {@code isClosed() == true}.
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* @throws NullPointerException
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* If {@code request} was {@code null}.
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*/
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void abandon(AbandonRequest request)
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throws UnsupportedOperationException, IllegalStateException,
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NullPointerException;
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/**
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* Adds an entry to the Directory Server using the provided add
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* request.
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*
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* @param <P>
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* The type of the additional parameter to the handler's
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* methods.
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* @param request
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* The add request.
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* @param handler
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* A result handler which can be used to asynchronously
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* process the operation result when it is received, may be
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* {@code null}.
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* @param p
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* Optional additional handler parameter.
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* @return A future representing the result of the operation.
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* @throws UnsupportedOperationException
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* If this connection does not support add operations.
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* @throws IllegalStateException
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* If this connection has already been closed, i.e. if
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* {@code isClosed() == true}.
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* @throws NullPointerException
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* If {@code request} was {@code null}.
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*/
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<P> ResultFuture<Result> add(AddRequest request,
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ResultHandler<Result, P> handler, P p)
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throws UnsupportedOperationException, IllegalStateException,
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NullPointerException;
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/**
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* Authenticates to the Directory Server using the provided bind
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* request.
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*
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* @param <P>
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* The type of the additional parameter to the handler's
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* methods.
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* @param request
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* The bind request.
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* @param handler
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* A result handler which can be used to asynchronously
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* process the operation result when it is received, may be
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* {@code null}.
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* @param p
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* Optional additional handler parameter.
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* @return A future representing the result of the operation.
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* @throws UnsupportedOperationException
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* If this connection does not support bind operations.
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* @throws IllegalStateException
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* If this connection has already been closed, i.e. if
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* {@code isClosed() == true}.
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* @throws NullPointerException
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* If {@code request} was {@code null}.
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*/
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<P> ResultFuture<BindResult> bind(BindRequest request,
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ResultHandler<? super BindResult, P> handler, P p)
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throws UnsupportedOperationException, IllegalStateException,
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NullPointerException;
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/**
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* Releases any resources associated with this connection. For
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* physical connections to a Directory Server this will mean that an
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* unbind request is sent and the underlying socket is closed.
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* <p>
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* Other connection implementations may behave differently, and may
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* choose not to send an unbind request if its use is inappropriate
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* (for example a pooled connection will be released and returned to
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* its connection pool without ever issuing an unbind request).
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* <p>
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* This method is semantically equivalent to the following code:
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*
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* <pre>
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* UnbindRequest request = Requests.newUnbindRequest();
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* connection.close(request);
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* </pre>
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*
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* Calling {@code close} on a connection that is already closed has no
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* effect.
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*/
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void close();
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/**
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* Releases any resources associated with this connection. For
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* physical connections to a Directory Server this will mean that the
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* provided unbind request is sent and the underlying socket is
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* closed.
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* <p>
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* Other connection implementations may behave differently, and may
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* choose to ignore the provided unbind request if its use is
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* inappropriate (for example a pooled connection will be released and
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* returned to its connection pool without ever issuing an unbind
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* request).
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* <p>
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* Calling {@code close} on a connection that is already closed has no
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* effect.
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*
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* @param request
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* The unbind request to use in the case where a physical
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* connection is closed.
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* @throws NullPointerException
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* If {@code request} was {@code null}.
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*/
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void close(UnbindRequest request) throws NullPointerException;
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/**
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* Compares an entry in the Directory Server using the provided
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* compare request.
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*
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* @param <P>
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* The type of the additional parameter to the handler's
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* methods.
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* @param request
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* The compare request.
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* @param handler
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* A result handler which can be used to asynchronously
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* process the operation result when it is received, may be
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* {@code null}.
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* @param p
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* Optional additional handler parameter.
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* @return A future representing the result of the operation.
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* @throws UnsupportedOperationException
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* If this connection does not support compare operations.
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* @throws IllegalStateException
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* If this connection has already been closed, i.e. if
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* {@code isClosed() == true}.
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* @throws NullPointerException
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* If {@code request} was {@code null}.
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*/
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<P> ResultFuture<CompareResult> compare(CompareRequest request,
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ResultHandler<? super CompareResult, P> handler, P p)
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throws UnsupportedOperationException, IllegalStateException,
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NullPointerException;
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/**
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* Deletes an entry from the Directory Server using the provided
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* delete request.
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*
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* @param <P>
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* The type of the additional parameter to the handler's
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* methods.
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* @param request
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* The delete request.
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* @param handler
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* A result handler which can be used to asynchronously
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* process the operation result when it is received, may be
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* {@code null}.
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* @param p
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* Optional additional handler parameter.
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* @return A future representing the result of the operation.
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* @throws UnsupportedOperationException
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* If this connection does not support delete operations.
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* @throws IllegalStateException
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* If this connection has already been closed, i.e. if
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* {@code isClosed() == true}.
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* @throws NullPointerException
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* If {@code request} was {@code null}.
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*/
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<P> ResultFuture<Result> delete(DeleteRequest request,
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ResultHandler<Result, P> handler, P p)
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throws UnsupportedOperationException, IllegalStateException,
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NullPointerException;
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/**
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* Requests that the Directory Server performs the provided extended
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* request.
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*
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* @param <R>
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* The type of result returned by the extended request.
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* @param <P>
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* The type of the additional parameter to the handler's
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* methods.
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* @param request
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* The extended request.
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* @param handler
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* A result handler which can be used to asynchronously
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* process the operation result when it is received, may be
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* {@code null}.
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* @param p
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* Optional additional handler parameter.
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* @return A future representing the result of the operation.
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* @throws UnsupportedOperationException
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* If this connection does not support extended operations.
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* @throws IllegalStateException
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* If this connection has already been closed, i.e. if
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* {@code isClosed() == true}.
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* @throws NullPointerException
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* If {@code request} was {@code null}.
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*/
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<R extends Result, P> ResultFuture<R> extendedRequest(
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ExtendedRequest<R> request, ResultHandler<? super R, P> handler,
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P p) throws UnsupportedOperationException, IllegalStateException,
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NullPointerException;
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/**
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* Modifies an entry in the Directory Server using the provided modify
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* request.
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*
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* @param <P>
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* The type of the additional parameter to the handler's
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* methods.
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* @param request
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* The modify request.
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* @param handler
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* A result handler which can be used to asynchronously
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* process the operation result when it is received, may be
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* {@code null}.
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* @param p
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* Optional additional handler parameter.
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* @return A future representing the result of the operation.
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* @throws UnsupportedOperationException
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* If this connection does not support modify operations.
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* @throws IllegalStateException
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* If this connection has already been closed, i.e. if
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* {@code isClosed() == true}.
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* @throws NullPointerException
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* If {@code request} was {@code null}.
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*/
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<P> ResultFuture<Result> modify(ModifyRequest request,
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ResultHandler<Result, P> handler, P p)
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throws UnsupportedOperationException, IllegalStateException,
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NullPointerException;
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/**
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* Renames an entry in the Directory Server using the provided modify
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* DN request.
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*
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* @param <P>
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* The type of the additional parameter to the handler's
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* methods.
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* @param request
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* The modify DN request.
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* @param handler
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* A result handler which can be used to asynchronously
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* process the operation result when it is received, may be
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* {@code null}.
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* @param p
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* Optional additional handler parameter.
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* @return A future representing the result of the operation.
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* @throws UnsupportedOperationException
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* If this connection does not support modify DN operations.
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* @throws IllegalStateException
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* If this connection has already been closed, i.e. if
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* {@code isClosed() == true}.
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* @throws NullPointerException
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* If {@code request} was {@code null}.
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*/
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<P> ResultFuture<Result> modifyDN(ModifyDNRequest request,
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ResultHandler<Result, P> handler, P p)
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throws UnsupportedOperationException, IllegalStateException,
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NullPointerException;
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/**
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* Searches the Directory Server using the provided search request.
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*
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* @param <P>
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* The type of the additional parameter to the handler's
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* methods.
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* @param request
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* The search request.
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* @param resultHandler
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* A result handler which can be used to asynchronously
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* process the operation result when it is received, may be
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* {@code null}.
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* @param searchResulthandler
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* A search result handler which can be used to
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* asynchronously process the search result entries and
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* references as they are received, may be {@code null}.
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* @param p
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* Optional additional handler parameter.
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* @return A future representing the result of the operation.
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* @throws UnsupportedOperationException
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* If this connection does not support search operations.
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* @throws IllegalStateException
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* If this connection has already been closed, i.e. if
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* {@code isClosed() == true}.
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* @throws NullPointerException
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* If {@code request} was {@code null}.
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*/
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<P> ResultFuture<Result> search(SearchRequest request,
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ResultHandler<Result, P> resultHandler,
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SearchResultHandler<P> searchResulthandler, P p)
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throws UnsupportedOperationException, IllegalStateException,
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NullPointerException;
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/**
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* Registers the provided connection event listener so that it will be
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* notified when this connection is closed by the application,
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* receives an unsolicited notification, or experiences a fatal error.
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*
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* @param listener
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* The listener which wants to be notified when events occur
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* on this connection.
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* @throws IllegalStateException
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* If this connection has already been closed, i.e. if
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* {@code isClosed() == true}.
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* @throws NullPointerException
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* If the {@code listener} was {@code null}.
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*/
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void addConnectionEventListener(ConnectionEventListener listener)
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throws IllegalStateException, NullPointerException;
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/**
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* Removes the provided connection event listener from this connection
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* so that it will no longer be notified when this connection is
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* closed by the application, receives an unsolicited notification, or
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* experiences a fatal error.
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*
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* @param listener
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* The listener which no longer wants to be notified when
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* events occur on this connection.
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* @throws NullPointerException
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* If the {@code listener} was {@code null}.
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*/
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void removeConnectionEventListener(ConnectionEventListener listener)
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throws NullPointerException;
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}
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