Package org.apache.synapse.transport.nhttp

Source Code of org.apache.synapse.transport.nhttp.LoggingNHttpClientConnection

/*
*  Licensed to the Apache Software Foundation (ASF) under one
*  or more contributor license agreements.  See the NOTICE file
*  distributed with this work for additional information
*  regarding copyright ownership.  The ASF licenses this file
*  to you under the Apache License, Version 2.0 (the
*  "License"); you may not use this file except in compliance
*  with the License.  You may obtain a copy of the License at
*
*   http://www.apache.org/licenses/LICENSE-2.0
*
*  Unless required by applicable law or agreed to in writing,
*  software distributed under the License is distributed on an
*   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
*  KIND, either express or implied.  See the License for the
*  specific language governing permissions and limitations
*  under the License.
*/
package org.apache.synapse.transport.nhttp;

import java.io.IOException;
import java.nio.channels.ReadableByteChannel;
import java.util.concurrent.atomic.AtomicLong;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.Header;
import org.apache.http.HttpException;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.HttpResponseFactory;
import org.apache.http.impl.nio.DefaultNHttpClientConnection;
import org.apache.http.nio.NHttpClientHandler;
import org.apache.http.nio.NHttpMessageParser;
import org.apache.http.nio.NHttpMessageWriter;
import org.apache.http.nio.reactor.IOSession;
import org.apache.http.nio.reactor.SessionInputBuffer;
import org.apache.http.nio.reactor.SessionOutputBuffer;
import org.apache.http.nio.util.ByteBufferAllocator;
import org.apache.http.params.HttpParams;

public class LoggingNHttpClientConnection extends DefaultNHttpClientConnection {

    private static final AtomicLong COUNT = new AtomicLong();

    private final Log log;
    private final Log iolog;
    private final Log headerlog;
    private final Log wirelog;
    private final String id;

    public LoggingNHttpClientConnection(
            final IOSession session,
            final HttpResponseFactory responseFactory,
            final ByteBufferAllocator allocator,
            final HttpParams params) {
        super(session, responseFactory, allocator, params);
        this.log = LogFactory.getLog(getClass());
        this.iolog = LogFactory.getLog(session.getClass());
        this.headerlog = LogFactory.getLog(LoggingUtils.HEADER_LOG_ID);
        this.wirelog = LogFactory.getLog(LoggingUtils.WIRE_LOG_ID);
        this.id = "http-outgoing-" + COUNT.incrementAndGet();
        if (this.iolog.isDebugEnabled() || this.wirelog.isDebugEnabled()) {
            this.session = new LoggingIOSession(session, this.id, this.iolog, this.wirelog);
        }
    }

    @Override
    public void close() throws IOException {
        if (this.log.isDebugEnabled()) {
            this.log.debug(this.id + ": Close connection");
        }
        super.close();
    }

    @Override
    public void shutdown() throws IOException {
        if (this.log.isDebugEnabled()) {
            this.log.debug(this.id + ": Shutdown connection");
        }
        super.shutdown();
    }

    @Override
    public void submitRequest(final HttpRequest request) throws IOException, HttpException {
        if (this.log.isDebugEnabled()) {
            this.log.debug(this.id + ": "  + request.getRequestLine().toString());
        }
        super.submitRequest(request);
    }

    @Override
    public void consumeInput(final NHttpClientHandler handler) {
        if (this.log.isDebugEnabled()) {
            this.log.debug(this.id + ": Consume input");
        }
        super.consumeInput(handler);
    }

    @Override
    public void produceOutput(final NHttpClientHandler handler) {
        if (this.log.isDebugEnabled()) {
            this.log.debug(this.id + ": Produce output");
        }
        super.produceOutput(handler);
    }

    @Override
    protected NHttpMessageWriter<HttpRequest> createRequestWriter(
            final SessionOutputBuffer buffer,
            final HttpParams params) {
        return new LoggingNHttpMessageWriter(
                super.createRequestWriter(buffer, params));
    }

    @Override
    protected NHttpMessageParser<HttpResponse> createResponseParser(
            final SessionInputBuffer buffer,
            final HttpResponseFactory responseFactory,
            final HttpParams params) {
        return new LoggingNHttpMessageParser(
                super.createResponseParser(buffer, responseFactory, params));
    }

    @Override
    public String toString() {
        return this.id;
    }

    class LoggingNHttpMessageWriter implements NHttpMessageWriter<HttpRequest> {

        private final NHttpMessageWriter<HttpRequest> writer;

        public LoggingNHttpMessageWriter(final NHttpMessageWriter<HttpRequest> writer) {
            super();
            this.writer = writer;
        }

        public void reset() {
            this.writer.reset();
        }

        public void write(final HttpRequest message) throws IOException, HttpException {
            if (message != null && headerlog.isDebugEnabled()) {
                headerlog.debug(id + " >> " + message.getRequestLine().toString());
                Header[] headers = message.getAllHeaders();
                for (int i = 0; i < headers.length; i++) {
                    headerlog.debug(id + " >> " + headers[i].toString());
                }
            }
            this.writer.write(message);
        }

    }

    class LoggingNHttpMessageParser implements NHttpMessageParser<HttpResponse> {

        private final NHttpMessageParser<HttpResponse> parser;

        public LoggingNHttpMessageParser(final NHttpMessageParser<HttpResponse> parser) {
            super();
            this.parser = parser;
        }

        public void reset() {
            this.parser.reset();
        }

        public int fillBuffer(final ReadableByteChannel channel) throws IOException {
            return this.parser.fillBuffer(channel);
        }

        public HttpResponse parse() throws IOException, HttpException {
            HttpResponse message = this.parser.parse();
            if (message != null && headerlog.isDebugEnabled()) {
                headerlog.debug(id + " << " + message.getStatusLine().toString());
                Header[] headers = message.getAllHeaders();
                for (int i = 0; i < headers.length; i++) {
                    headerlog.debug(id + " << " + headers[i].toString());
                }
            }
            return message;
        }

    }

}
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