/*
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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 com.sun.opends.sdk.ldap;
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import java.io.IOException;
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import com.sun.grizzly.Connection;
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import com.sun.grizzly.filterchain.*;
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import com.sun.grizzly.streams.StreamReader;
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import com.sun.grizzly.streams.StreamWriter;
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import com.sun.grizzly.utils.ConcurrentQueuePool;
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import org.opends.sdk.ldap.LDAPDecoder;
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/**
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* Abstract LDAP transport.
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*/
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public abstract class AbstractLDAPTransport
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{
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private class ASN1ReaderPool extends
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ConcurrentQueuePool<ASN1StreamReader>
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{
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@Override
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public ASN1StreamReader newInstance()
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{
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return new ASN1StreamReader(maxASN1ElementSize);
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}
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}
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private class ASN1WriterPool extends
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ConcurrentQueuePool<ASN1StreamWriter>
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{
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@Override
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public ASN1StreamWriter newInstance()
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{
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return new ASN1StreamWriter();
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}
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}
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private class DefaultFilterChainFactory implements
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PatternFilterChainFactory
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{
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private FilterChain defaultFilterChain;
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private DefaultFilterChainFactory()
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{
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this.defaultFilterChain = new DefaultFilterChain(this);
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this.defaultFilterChain.add(new MonitorFilter());
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this.defaultFilterChain.add(new TransportFilter());
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this.defaultFilterChain.add(new LDAPFilter());
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}
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public FilterChain create()
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{
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FilterChain filterChain = new DefaultFilterChain(this);
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filterChain.addAll(defaultFilterChain);
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return filterChain;
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}
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public FilterChain getFilterChainPattern()
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{
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return defaultFilterChain;
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}
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public void release(FilterChain chain)
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{
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// TODO: Nothing yet.
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}
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public void setFilterChainPattern(FilterChain chain)
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{
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defaultFilterChain = chain;
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}
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}
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private class LDAPFilter extends FilterAdapter
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{
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@Override
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public NextAction handleRead(FilterChainContext ctx,
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NextAction nextAction) throws IOException
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{
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Connection<?> connection = ctx.getConnection();
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StreamReader streamReader = ctx.getStreamReader();
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LDAPMessageHandler handler = getMessageHandler(connection);
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ASN1StreamReader asn1Reader = getASN1Reader(streamReader);
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try
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{
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do
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{
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LDAPDecoder.decode(asn1Reader, handler);
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}
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while (asn1Reader.hasNextElement());
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}
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finally
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{
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releaseASN1Reader(asn1Reader);
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}
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return nextAction;
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}
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}
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private class MonitorFilter extends FilterAdapter
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{
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@Override
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public void exceptionOccurred(FilterChainContext ctx,
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Throwable error)
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{
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Connection<?> connection = ctx.getConnection();
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if (!connection.isOpen())
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{
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// Grizzly doens't not deregister the read interest from the
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// selector so closing the connection results in an
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// EOFException.
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// Just ignore errors on closed connections.
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return;
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}
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LDAPMessageHandler handler = getMessageHandler(connection);
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handler.handleException(error);
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}
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@Override
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public NextAction handleClose(FilterChainContext ctx,
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NextAction nextAction) throws IOException
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{
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Connection<?> connection = ctx.getConnection();
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removeMessageHandler(connection);
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return nextAction;
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}
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}
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private final PatternFilterChainFactory defaultFilterChainFactory;
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private final int maxASN1ElementSize = 0;
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private final ASN1ReaderPool asn1ReaderPool;
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private final ASN1WriterPool asn1WriterPool;
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protected AbstractLDAPTransport()
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{
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this.defaultFilterChainFactory = new DefaultFilterChainFactory();
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this.asn1ReaderPool = new ASN1ReaderPool();
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this.asn1WriterPool = new ASN1WriterPool();
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}
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public ASN1StreamWriter getASN1Writer(StreamWriter streamWriter)
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{
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ASN1StreamWriter asn1Writer = asn1WriterPool.poll();
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asn1Writer.setStreamWriter(streamWriter);
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return asn1Writer;
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}
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public PatternFilterChainFactory getDefaultFilterChainFactory()
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{
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return defaultFilterChainFactory;
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}
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public void releaseASN1Writer(ASN1StreamWriter asn1Writer)
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{
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asn1WriterPool.offer(asn1Writer);
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}
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protected abstract LDAPMessageHandler getMessageHandler(
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Connection<?> connection);
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protected abstract void removeMessageHandler(Connection<?> connection);
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private ASN1StreamReader getASN1Reader(StreamReader streamReader)
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{
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ASN1StreamReader asn1Reader = asn1ReaderPool.poll();
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asn1Reader.setStreamReader(streamReader);
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return asn1Reader;
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}
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private void releaseASN1Reader(ASN1StreamReader asn1Reader)
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{
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asn1ReaderPool.offer(asn1Reader);
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}
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}
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