| /* |
| * 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.utils.logging; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.http.nio.reactor.IOSession; |
| import org.apache.http.nio.reactor.SessionBufferStatus; |
| import org.apache.http.nio.reactor.ssl.SSLIOSession; |
| |
| import java.io.IOException; |
| import java.net.SocketAddress; |
| import java.nio.ByteBuffer; |
| import java.nio.channels.ByteChannel; |
| import java.nio.channels.SelectionKey; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| /** |
| * A decorator (wrapper) for IOSession instances. This decorator logs additional |
| * debug information regarding each of the events triggered on the actual IOSession |
| * instance. Most events are logged 'before' they are dispatched to the wrapped |
| * IOSession, but this implementation does not modify the event arguments by any means. |
| * In that sense this decorator is read-only and safe. This implementation also facilitates |
| * intercepting and logging HTTP messages at wire-level. |
| */ |
| public class LoggingIOSession implements IOSession { |
| |
| private static AtomicLong COUNT = new AtomicLong(0); |
| |
| private final Log sessionLog; |
| private final Wire wireLog; |
| private final IOSession session; |
| private final ByteChannel channel; |
| private final String id; |
| |
| /** |
| * Create a new instance of the decorator. |
| * |
| * @param sessionLog Log instance used to log IOSession events. |
| * @param wireLog Log instance used to log wire-level HTTP messages. |
| * @param session IOSession to be decorated. |
| * @param id An identifier (name) that will be attached to the IOSession for the logging |
| * purposes. |
| */ |
| public LoggingIOSession( |
| final Log sessionLog, |
| final Log wireLog, |
| final IOSession session, |
| final String id) { |
| if (session == null) { |
| throw new IllegalArgumentException("I/O session must not be null"); |
| } |
| this.session = session; |
| this.channel = new LoggingByteChannel(); |
| this.id = id + "-" + COUNT.incrementAndGet(); |
| this.sessionLog = sessionLog; |
| this.wireLog = new Wire(wireLog); |
| } |
| |
| public int getStatus() { |
| return this.session.getStatus(); |
| } |
| |
| public ByteChannel channel() { |
| return this.channel; |
| } |
| |
| public SocketAddress getLocalAddress() { |
| return this.session.getLocalAddress(); |
| } |
| |
| public SocketAddress getRemoteAddress() { |
| return this.session.getRemoteAddress(); |
| } |
| |
| public int getEventMask() { |
| return this.session.getEventMask(); |
| } |
| |
| private static String formatOps(int ops) { |
| StringBuilder buffer = new StringBuilder(6); |
| buffer.append('['); |
| if ((ops & SelectionKey.OP_READ) > 0) { |
| buffer.append('r'); |
| } |
| if ((ops & SelectionKey.OP_WRITE) > 0) { |
| buffer.append('w'); |
| } |
| if ((ops & SelectionKey.OP_ACCEPT) > 0) { |
| buffer.append('a'); |
| } |
| if ((ops & SelectionKey.OP_CONNECT) > 0) { |
| buffer.append('c'); |
| } |
| buffer.append(']'); |
| return buffer.toString(); |
| } |
| |
| private String getPreamble() { |
| String preamble = "I/O session " + this.id + " " + this.session; |
| if (this.session instanceof SSLIOSession) { |
| return "SSL " + preamble; |
| } else { |
| return preamble; |
| } |
| } |
| |
| public void setEventMask(int ops) { |
| if (sessionLog.isDebugEnabled()) { |
| sessionLog.debug(getPreamble() + ": Set event mask " + formatOps(ops)); |
| } |
| this.session.setEventMask(ops); |
| } |
| |
| public void setEvent(int op) { |
| if (sessionLog.isDebugEnabled()) { |
| sessionLog.debug(getPreamble() + ": Set event " + formatOps(op)); |
| } |
| this.session.setEvent(op); |
| } |
| |
| public void clearEvent(int op) { |
| if (sessionLog.isDebugEnabled()) { |
| sessionLog.debug(getPreamble() + ": Clear event " + formatOps(op)); |
| } |
| this.session.clearEvent(op); |
| } |
| |
| public void close() { |
| if (sessionLog.isDebugEnabled()) { |
| sessionLog.debug(getPreamble() + ": Close"); |
| } |
| this.session.close(); |
| } |
| |
| public boolean isClosed() { |
| return this.session.isClosed(); |
| } |
| |
| public void shutdown() { |
| if (sessionLog.isDebugEnabled()) { |
| sessionLog.debug(getPreamble() + ": Shutdown"); |
| } |
| this.session.shutdown(); |
| } |
| |
| public int getSocketTimeout() { |
| return this.session.getSocketTimeout(); |
| } |
| |
| public void setSocketTimeout(int timeout) { |
| if (sessionLog.isDebugEnabled()) { |
| sessionLog.debug(getPreamble() + ": Set timeout " + timeout); |
| } |
| this.session.setSocketTimeout(timeout); |
| } |
| |
| public void setBufferStatus(final SessionBufferStatus status) { |
| this.session.setBufferStatus(status); |
| } |
| |
| public boolean hasBufferedInput() { |
| return this.session.hasBufferedInput(); |
| } |
| |
| public boolean hasBufferedOutput() { |
| return this.session.hasBufferedOutput(); |
| } |
| |
| public Object getAttribute(final String name) { |
| return this.session.getAttribute(name); |
| } |
| |
| public void setAttribute(final String name, final Object obj) { |
| if (sessionLog.isDebugEnabled()) { |
| sessionLog.debug(getPreamble() + ": Set attribute " + name); |
| } |
| this.session.setAttribute(name, obj); |
| } |
| |
| public Object removeAttribute(final String name) { |
| if (sessionLog.isDebugEnabled()) { |
| sessionLog.debug(getPreamble() + ": Remove attribute " + name); |
| } |
| return this.session.removeAttribute(name); |
| } |
| |
| class LoggingByteChannel implements ByteChannel { |
| |
| public int read(final ByteBuffer dst) throws IOException { |
| int bytesRead = session.channel().read(dst); |
| if (sessionLog.isDebugEnabled()) { |
| sessionLog.debug(getPreamble() + ": " + bytesRead + " bytes read"); |
| } |
| if (bytesRead > 0 && wireLog.isEnabled()) { |
| ByteBuffer b = dst.duplicate(); |
| int p = b.position(); |
| b.limit(p); |
| b.position(p - bytesRead); |
| wireLog.input(b); |
| } |
| return bytesRead; |
| } |
| |
| public int write(final ByteBuffer src) throws IOException { |
| int byteWritten = session.channel().write(src); |
| if (sessionLog.isDebugEnabled()) { |
| sessionLog.debug(getPreamble() + ": " + byteWritten + " bytes written"); |
| } |
| if (byteWritten > 0 && wireLog.isEnabled()) { |
| ByteBuffer b = src.duplicate(); |
| int p = b.position(); |
| b.limit(p); |
| b.position(p - byteWritten); |
| wireLog.output(b); |
| } |
| return byteWritten; |
| } |
| |
| public void close() throws IOException { |
| if (sessionLog.isDebugEnabled()) { |
| sessionLog.debug(getPreamble() + ": Channel close"); |
| } |
| session.channel().close(); |
| } |
| |
| public boolean isOpen() { |
| return session.channel().isOpen(); |
| } |
| |
| } |
| } |