/*
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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 legal-notices/CDDLv1_0.txt
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* or http://forgerock.org/license/CDDLv1.0.html.
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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 legal-notices/CDDLv1_0.txt.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* 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 2009-2010 Sun Microsystems, Inc.
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* Portions copyright 2011-2012 ForgeRock AS
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*/
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package org.forgerock.opendj.ldap;
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import java.util.concurrent.ScheduledExecutorService;
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import java.util.concurrent.TimeUnit;
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import org.forgerock.opendj.ldap.requests.BindRequest;
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import org.forgerock.opendj.ldap.requests.SearchRequest;
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import com.forgerock.opendj.util.Validator;
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/**
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* This class contains methods for creating and manipulating connection
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* factories and connections.
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*/
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public final class Connections {
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/**
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* Creates a new authenticated connection factory which will obtain
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* connections using the provided connection factory and immediately perform
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* the provided Bind request.
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* <p>
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* The connections returned by an authenticated connection factory support
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* all operations with the exception of Bind requests. Attempts to perform a
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* Bind will result in an {@code UnsupportedOperationException}.
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* <p>
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* If the Bind request fails for some reason (e.g. invalid credentials),
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* then the connection attempt will fail and an {@code ErrorResultException}
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* will be thrown.
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*
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* @param factory
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* The connection factory to use for connecting to the Directory
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* Server.
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* @param request
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* The Bind request to use for authentication.
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* @return The new connection pool.
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* @throws NullPointerException
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* If {@code factory} or {@code request} was {@code null}.
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*/
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public static ConnectionFactory newAuthenticatedConnectionFactory(
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final ConnectionFactory factory, final BindRequest request) {
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Validator.ensureNotNull(factory, request);
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return new AuthenticatedConnectionFactory(factory, request);
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}
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/**
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* Creates a new connection pool which will maintain {@code poolSize}
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* connections created using the provided connection factory.
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* <p>
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* Connections obtained from the connection pool are guaranteed to be valid
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* immediately before being returned to the calling application. More
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* specifically, connections which have remained idle in the connection pool
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* for a long time and which have been remotely closed due to a time out
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* will never be returned. However, once a pooled connection has been
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* obtained it is the responsibility of the calling application to handle
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* subsequent connection failures, these being signaled via a
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* {@link ConnectionException}.
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*
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* @param factory
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* The connection factory to use for creating new connections.
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* @param poolSize
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* The maximum size of the connection pool.
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* @return The new connection pool.
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* @throws IllegalArgumentException
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* If {@code poolSize} is negative.
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* @throws NullPointerException
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* If {@code factory} was {@code null}.
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*/
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public static ConnectionPool newFixedConnectionPool(final ConnectionFactory factory,
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final int poolSize) {
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Validator.ensureNotNull(factory);
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Validator.ensureTrue(poolSize >= 0, "negative pool size");
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return new FixedConnectionPool(factory, poolSize);
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}
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/**
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* Creates a new heart-beat connection factory which will create connections
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* using the provided connection factory and periodically ping any created
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* connections in order to detect that they are still alive every 10 seconds
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* using the default scheduler.
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*
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* @param factory
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* The connection factory to use for creating connections.
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* @return The new heart-beat connection factory.
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* @throws NullPointerException
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* If {@code factory} was {@code null}.
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*/
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public static ConnectionFactory newHeartBeatConnectionFactory(final ConnectionFactory factory) {
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return new HeartBeatConnectionFactory(factory);
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}
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/**
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* Creates a new heart-beat connection factory which will create connections
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* using the provided connection factory and periodically ping any created
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* connections in order to detect that they are still alive using the
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* specified frequency and the default scheduler.
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*
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* @param factory
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* The connection factory to use for creating connections.
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* @param interval
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* The interval between keepalive pings.
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* @param unit
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* The time unit for the interval between keepalive pings.
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* @return The new heart-beat connection factory.
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* @throws IllegalArgumentException
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* If {@code interval} was negative.
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* @throws NullPointerException
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* If {@code factory} or {@code unit} was {@code null}.
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*/
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public static ConnectionFactory newHeartBeatConnectionFactory(final ConnectionFactory factory,
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final long interval, final TimeUnit unit) {
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return new HeartBeatConnectionFactory(factory, interval, unit);
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}
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/**
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* Creates a new heart-beat connection factory which will create connections
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* using the provided connection factory and periodically ping any created
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* connections using the specified search request in order to detect that
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* they are still alive.
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*
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* @param factory
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* The connection factory to use for creating connections.
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* @param interval
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* The interval between keepalive pings.
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* @param unit
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* The time unit for the interval between keepalive pings.
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* @param heartBeat
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* The search request to use for keepalive pings.
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* @return The new heart-beat connection factory.
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* @throws IllegalArgumentException
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* If {@code interval} was negative.
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* @throws NullPointerException
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* If {@code factory}, {@code unit}, or {@code heartBeat} was
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* {@code null}.
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*/
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public static ConnectionFactory newHeartBeatConnectionFactory(final ConnectionFactory factory,
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final long interval, final TimeUnit unit, final SearchRequest heartBeat) {
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return new HeartBeatConnectionFactory(factory, interval, unit, heartBeat);
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}
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/**
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* Creates a new heart-beat connection factory which will create connections
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* using the provided connection factory and periodically ping any created
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* connections using the specified search request in order to detect that
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* they are still alive.
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*
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* @param factory
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* The connection factory to use for creating connections.
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* @param interval
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* The interval between keepalive pings.
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* @param unit
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* The time unit for the interval between keepalive pings.
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* @param heartBeat
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* The search request to use for keepalive pings.
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* @param scheduler
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* The scheduler which should for periodically sending keepalive
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* pings.
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* @return The new heart-beat connection factory.
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* @throws IllegalArgumentException
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* If {@code interval} was negative.
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* @throws NullPointerException
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* If {@code factory}, {@code unit}, or {@code heartBeat} was
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* {@code null}.
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*/
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public static ConnectionFactory newHeartBeatConnectionFactory(final ConnectionFactory factory,
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final long interval, final TimeUnit unit, final SearchRequest heartBeat,
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final ScheduledExecutorService scheduler) {
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return new HeartBeatConnectionFactory(factory, interval, unit, heartBeat, scheduler);
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}
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/**
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* Creates a new connection factory which binds internal client connections
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* to {@link ServerConnection}s created using the provided
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* {@link ServerConnectionFactory}.
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* <p>
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* When processing requests, {@code ServerConnection} implementations are
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* passed an integer as the first parameter. This integer represents a
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* pseudo {@code requestID} which is incremented for each successive
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* internal request on a per client connection basis. The request ID may be
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* useful for logging purposes.
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* <p>
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* An internal connection factory does not require {@code ServerConnection}
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* implementations to return a result when processing requests. However, it
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* is recommended that implementations do always return results even for
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* abandoned requests. This is because application client threads may block
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* indefinitely waiting for results.
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*
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* @param <C>
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* The type of client context.
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* @param factory
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* The server connection factory to use for creating connections.
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* @param clientContext
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* The client context.
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* @return The new internal connection factory.
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* @throws NullPointerException
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* If {@code factory} was {@code null}.
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*/
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public static <C> ConnectionFactory newInternalConnectionFactory(
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final ServerConnectionFactory<C, Integer> factory, final C clientContext) {
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Validator.ensureNotNull(factory);
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return new InternalConnectionFactory<C>(factory, clientContext);
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}
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/**
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* Creates a new load balancer which will obtain connections using the
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* provided load balancing algorithm.
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*
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* @param algorithm
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* The load balancing algorithm which will be used to obtain the
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* next
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* @return The new load balancer.
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* @throws NullPointerException
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* If {@code algorithm} was {@code null}.
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*/
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public static ConnectionFactory newLoadBalancer(final LoadBalancingAlgorithm algorithm) {
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return new LoadBalancer(algorithm);
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}
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/**
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* Creates a new connection factory which forwards connection requests to
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* the provided factory, but whose {@code toString} method will always
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* return {@code name}.
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* <p>
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* This method may be useful for debugging purposes in order to more easily
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* identity connection factories.
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*
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* @param factory
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* The connection factory to be named.
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* @param name
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* The name of the connection factory.
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* @return The named connection factory.
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* @throws NullPointerException
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* If {@code factory} or {@code name} was {@code null}.
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*/
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public static ConnectionFactory newNamedConnectionFactory(final ConnectionFactory factory,
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final String name) {
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Validator.ensureNotNull(factory, name);
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return new ConnectionFactory() {
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@Override
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public FutureResult<Connection> getConnectionAsync(
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final ResultHandler<? super Connection> handler) {
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return factory.getConnectionAsync(handler);
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}
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@Override
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public Connection getConnection() throws ErrorResultException {
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return factory.getConnection();
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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 String toString() {
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return name;
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}
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};
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}
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/**
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* Creates a new server connection factory using the provided
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* {@link RequestHandler}. The returned factory will manage connection and
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* request life-cycle, including request cancellation.
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* <p>
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* When processing requests, {@link RequestHandler} implementations are
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* passed a {@link RequestContext} as the first parameter which may be used
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* for detecting whether or not the request should be aborted due to
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* cancellation requests or other events, such as connection failure.
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* <p>
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* The returned factory maintains state information which includes a table
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* of active requests. Therefore, {@code RequestHandler} implementations are
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* required to always return results in order to avoid potential memory
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* leaks.
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*
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* @param <C>
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* The type of client context.
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* @param requestHandler
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* The request handler which will be used for all client
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* connections.
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* @return The new server connection factory.
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* @throws NullPointerException
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* If {@code requestHandler} was {@code null}.
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*/
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public static <C> ServerConnectionFactory<C, Integer> newServerConnectionFactory(
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final RequestHandler<RequestContext> requestHandler) {
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Validator.ensureNotNull(requestHandler);
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final RequestHandlerFactory<C, RequestContext> factory =
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new RequestHandlerFactory<C, RequestContext>() {
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public RequestHandler<RequestContext> handleAccept(C clientContext)
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throws ErrorResultException {
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return requestHandler;
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}
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};
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return new RequestHandlerFactoryAdapter<C>(factory);
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}
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/**
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* Creates a new server connection factory using the provided
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* {@link RequestHandlerFactory}. The returned factory will manage
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* connection and request life-cycle, including request cancellation.
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* <p>
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* When processing requests, {@link RequestHandler} implementations are
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* passed a {@link RequestContext} as the first parameter which may be used
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* for detecting whether or not the request should be aborted due to
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* cancellation requests or other events, such as connection failure.
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* <p>
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* The returned factory maintains state information which includes a table
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* of active requests. Therefore, {@code RequestHandler} implementations are
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* required to always return results in order to avoid potential memory
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* leaks.
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*
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* @param <C>
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* The type of client context.
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* @param factory
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* The request handler factory to use for associating request
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* handlers with client connections.
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* @return The new server connection factory.
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* @throws NullPointerException
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* If {@code factory} was {@code null}.
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*/
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public static <C> ServerConnectionFactory<C, Integer> newServerConnectionFactory(
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final RequestHandlerFactory<C, RequestContext> factory) {
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Validator.ensureNotNull(factory);
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return new RequestHandlerFactoryAdapter<C>(factory);
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}
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// Prevent instantiation.
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private Connections() {
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// Do nothing.
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}
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}
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