/*
 * 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.catalina;

import org.apache.catalina.connector.Request;
import org.apache.catalina.connector.Response;


Intended for use by a Valve to indicate that the Valve provides access logging. It is used by the Tomcat internals to identify a Valve that logs access requests so requests that are rejected earlier in the processing chain can still be added to the access log. Implementations of this interface should be robust against the provided Request and Response objects being null, having null attributes or any other 'oddness' that may result from attempting to log a request that was almost certainly rejected because it was mal-formed. /**
 * Intended for use by a {@link Valve} to indicate that the {@link Valve}
 * provides access logging. It is used by the Tomcat internals to identify a
 * Valve that logs access requests so requests that are rejected
 * earlier in the processing chain can still be added to the access log.
 * Implementations of this interface should be robust against the provided
 * {@link Request} and {@link Response} objects being null, having null
 * attributes or any other 'oddness' that may result from attempting to log
 * a request that was almost certainly rejected because it was mal-formed.
 */
public interface AccessLog {

    
Name of request attribute used to override the remote address recorded by
the AccessLog.
/**
     * Name of request attribute used to override the remote address recorded by
     * the AccessLog.
     */
    public static final String REMOTE_ADDR_ATTRIBUTE =
            "org.apache.catalina.AccessLog.RemoteAddr";

    
Name of request attribute used to override remote host name recorded by
the AccessLog.
/**
     * Name of request attribute used to override remote host name recorded by
     * the AccessLog.
     */
    public static final String REMOTE_HOST_ATTRIBUTE =
            "org.apache.catalina.AccessLog.RemoteHost";

    
Name of request attribute used to override the protocol recorded by the
AccessLog.
/**
     * Name of request attribute used to override the protocol recorded by the
     * AccessLog.
     */
    public static final String PROTOCOL_ATTRIBUTE =
            "org.apache.catalina.AccessLog.Protocol";

    
Name of request attribute used to override the server name recorded by
the AccessLog.
/**
     * Name of request attribute used to override the server name recorded by
     * the AccessLog.
     */
    public static final String SERVER_NAME_ATTRIBUTE =
            "org.apache.catalina.AccessLog.ServerName";

    
Name of request attribute used to override the server port recorded by
the AccessLog.
/**
     * Name of request attribute used to override the server port recorded by
     * the AccessLog.
     */
    public static final String SERVER_PORT_ATTRIBUTE =
            "org.apache.catalina.AccessLog.ServerPort";


    
Add the request/response to the access log using the specified processing
time.
Params:
request –   Request (associated with the response) to log
response –  Response (associated with the request) to log
time –      Time taken to process the request/response in
                 milliseconds (use 0 if not known)/**
     * Add the request/response to the access log using the specified processing
     * time.
     *
     * @param request   Request (associated with the response) to log
     * @param response  Response (associated with the request) to log
     * @param time      Time taken to process the request/response in
     *                  milliseconds (use 0 if not known)
     */
    public void log(Request request, Response response, long time);

    
Should this valve set request attributes for IP address, hostname, protocol and port used for the request? This are typically used in conjunction with the AccessLogValve which will otherwise log the original values. The attributes set are: 

org.apache.catalina.RemoteAddr
org.apache.catalina.RemoteHost
org.apache.catalina.Protocol
org.apache.catalina.ServerPost

Params:
requestAttributesEnabled –  true causes the attributes
                                 to be set, false disables
                                 the setting of the attributes./**
     * Should this valve set request attributes for IP address, hostname,
     * protocol and port used for the request? This are typically used in
     * conjunction with the {@link org.apache.catalina.valves.AccessLogValve}
     * which will otherwise log the original values.
     *
     * The attributes set are:
     * <ul>
     * <li>org.apache.catalina.RemoteAddr</li>
     * <li>org.apache.catalina.RemoteHost</li>
     * <li>org.apache.catalina.Protocol</li>
     * <li>org.apache.catalina.ServerPost</li>
     * </ul>
     *
     * @param requestAttributesEnabled  <code>true</code> causes the attributes
     *                                  to be set, <code>false</code> disables
     *                                  the setting of the attributes.
     */
    public void setRequestAttributesEnabled(boolean requestAttributesEnabled);

    
See Also:
setRequestAttributesEnabled(boolean)
Returns:
true if the attributes will be logged, otherwise
        false/**
     * @see #setRequestAttributesEnabled(boolean)
     * @return <code>true</code> if the attributes will be logged, otherwise
     *         <code>false</code>
     */
    public boolean getRequestAttributesEnabled();
}