/*
 *  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.axis2.transport.testkit.axis2;

import java.io.InputStream;
import java.io.OutputStream;

import javax.activation.DataSource;

import org.apache.axiom.om.OMOutputFormat;
import org.apache.axis2.context.MessageContext;
import org.apache.axis2.transport.testkit.util.LogManager;
import org.apache.commons.io.IOUtils;
import org.apache.commons.io.input.TeeInputStream;
import org.apache.commons.io.output.TeeOutputStream;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;

@Aspect
public class LogAspect {
    private static final Log log = LogFactory.getLog(LogAspect.class);
    
    @Around("call(void org.apache.axis2.transport.MessageFormatter.writeTo(" +
    		"       org.apache.axis2.context.MessageContext, org.apache.axiom.om.OMOutputFormat," +
    		"       java.io.OutputStream, boolean))" +
    		" && args(msgContext, format, out, preserve)")
    public void aroundWriteTo(ProceedingJoinPoint proceedingJoinPoint,
            MessageContext msgContext, OMOutputFormat format, OutputStream out, boolean preserve)
            throws Throwable {
        if (LogManager.INSTANCE.isLoggingEnabled()) {
            OutputStream log = LogManager.INSTANCE.createLog("formatter");
            try {
                OutputStream tee = new TeeOutputStream(out, log);
                proceedingJoinPoint.proceed(new Object[] { msgContext, format, tee, preserve });
            } finally {
                log.close();
            }
        } else {
            proceedingJoinPoint.proceed();
        }
    }
    
    @AfterReturning(
        pointcut="call(javax.activation.DataSource org.apache.axis2.format.MessageFormatterEx.getDataSource(..))",
        returning="dataSource")
    public void afterGetDataSource(DataSource dataSource) {
        if (LogManager.INSTANCE.isLoggingEnabled()) {
            try {
                OutputStream out = LogManager.INSTANCE.createLog("formatter");
                try {
                    InputStream in = dataSource.getInputStream();
                    try {
                        IOUtils.copy(in, out);
                    } finally {
                        in.close();
                    }
                } finally {
                    out.close();
                }
            } catch (Throwable ex) {
                log.error("Unable to dump message", ex);
            }
        }
    }
    
    @Around("call(org.apache.axiom.om.OMElement org.apache.axis2.builder.Builder.processDocument(" +
            "       java.io.InputStream, java.lang.String, org.apache.axis2.context.MessageContext))" +
            " && args(in, contentType, msgContext)")
    public Object aroundProcessDocument(ProceedingJoinPoint proceedingJoinPoint,
            InputStream in, String contentType, MessageContext msgContext) throws Throwable {
        if (LogManager.INSTANCE.isLoggingEnabled()) {
            InputStream tee;
            if (in == null) {
                tee = null;
            } else {
                OutputStream log = LogManager.INSTANCE.createLog("builder");
                // Note: We can't close the log right after the method execution because the
                //       message builder may use streaming. LogManager will take care of closing the
                //       log for us if anything goes wrong.
                tee = new TeeInputStream(in, log, true);
            }
            return proceedingJoinPoint.proceed(new Object[] { tee, contentType, msgContext });
        } else {
            return proceedingJoinPoint.proceed();
        }
    }
}
