org.apache.catalina.valves
Class JDBCAccessLogValve

java.lang.Object
  extended byorg.apache.catalina.valves.ValveBase
      extended byorg.apache.catalina.valves.JDBCAccessLogValve
All Implemented Interfaces:
Contained, Lifecycle, Valve

public final class JDBCAccessLogValve
extends ValveBase
implements Lifecycle

This Tomcat extension logs server access directly to a database, and can be used instead of the regular file-based access log implemented in AccessLogValve. To use, copy into the server/classes directory of the Tomcat installation and configure in server.xml as:

 		<Valve className="AccessLogDBValve"
        	driverName="your_jdbc_driver"
        	connectionURL="your_jdbc_url"
        	pattern="combined" resolveHosts="false"
 		/>
 

Many parameters can be configured, such as the database connection (with driverName and connectionURL), the table name (tableName) and the field names (corresponding to the get/set method names). The same options as AccessLogValve are supported, such as resolveHosts and pattern ("common" or "combined" only).

When Tomcat is started, a database connection (with autoReconnect option) is created and used for all the log activity. When Tomcat is shutdown, the database connection is closed. This logger can be used at the level of the Engine context (being shared by all the defined hosts) or the Host context (one instance of the logger per host, possibly using different databases).

The database table can be created with the following command:

 CREATE TABLE access (
 id INT UNSIGNED AUTO_INCREMENT NOT NULL,
 ts TIMESTAMP NOT NULL,
 remoteHost CHAR(15) NOT NULL,
 user CHAR(15),
 timestamp TIMESTAMP NOT NULL,
 virtualHost VARCHAR(64) NOT NULL,
 method VARCHAR(8) NOT NULL,
 query VARCHAR(255) NOT NULL,
 status SMALLINT UNSIGNED NOT NULL,
 bytes INT UNSIGNED NOT NULL,
 referer VARCHAR(128),
 userAgent VARCHAR(128),
 PRIMARY KEY (id),
 INDEX (ts),
 INDEX (remoteHost),
 INDEX (virtualHost),
 INDEX (query),
 INDEX (userAgent)
 );
 

If the table is created as above, its name and the field names don't need to be defined.

If the request method is "common", only these fields are used: remoteHost, user, timeStamp, query, status, bytes

TO DO: provide option for excluding logging of certain MIME types.

Version:
1.0
Author:
Andre de Jesus

Field Summary
protected static java.lang.String info
          The descriptive information about this implementation.
protected  LifecycleSupport lifecycle
          The lifecycle event support for this component.
 
Fields inherited from class org.apache.catalina.valves.ValveBase
container, debug
 
Fields inherited from interface org.apache.catalina.Lifecycle
AFTER_START_EVENT, AFTER_STOP_EVENT, BEFORE_START_EVENT, BEFORE_STOP_EVENT, START_EVENT, STOP_EVENT
 
Constructor Summary
JDBCAccessLogValve()
          Class constructor.
 
Method Summary
 void addLifecycleListener(LifecycleListener listener)
          Adds a Lifecycle listener.
 LifecycleListener[] findLifecycleListeners()
          Get the lifecycle listeners associated with this lifecycle.
 long getCurrentTimeMillis()
           
 void invoke(Request request, Response response, ValveContext context)
          This method is invoked by Tomcat on each query.
 void removeLifecycleListener(LifecycleListener listener)
          Removes a Lifecycle listener.
 void setBytesField(java.lang.String bytesField)
          Sets the name of the field containing the number of bytes returned.
 void setConnectionURL(java.lang.String connectionURL)
          Sets the JDBC URL for the database where the log is stored.
 void setDriverName(java.lang.String driverName)
          Sets the database driver name.
 void setMethodField(java.lang.String methodField)
          Sets the name of the field containing the HTTP request method.
 void setPattern(java.lang.String pattern)
          Sets the logging pattern.
 void setQueryField(java.lang.String queryField)
          Sets the name of the field containing the URL part of the HTTP query.
 void setRefererField(java.lang.String refererField)
          Sets the name of the field containing the referer.
 void setRemoteHostField(java.lang.String remoteHostField)
          Sets the name of the field containing the remote host.
 void setResolveHosts(java.lang.String resolveHosts)
          Determines whether IP host name resolution is done.
 void setStatusField(java.lang.String statusField)
          Sets the name of the field containing the HTTP response status code.
 void setTableName(java.lang.String tableName)
          Sets the name of the table where the logs are stored.
 void setTimestampField(java.lang.String timestampField)
          Sets the name of the field containing the server-determined timestamp.
 void setUserAgentField(java.lang.String userAgentField)
          Sets the name of the field containing the user agent.
 void setUserField(java.lang.String userField)
          Sets the name of the field containing the remote user name.
 void setVirtualHostField(java.lang.String virtualHostField)
          Sets the name of the field containing the virtual host information (this is in fact the server name).
 void start()
          Invoked by Tomcat on startup.
 void stop()
          Invoked by tomcat on shutdown.
 
Methods inherited from class org.apache.catalina.valves.ValveBase
getContainer, getDebug, getInfo, setContainer, setDebug
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

info

protected static java.lang.String info
The descriptive information about this implementation.


lifecycle

protected LifecycleSupport lifecycle
The lifecycle event support for this component.

Constructor Detail

JDBCAccessLogValve

public JDBCAccessLogValve()
Class constructor. Initializes the fields with the default values. The defaults are:
 		driverName = null;
 		connectionURL = null;
 		tableName = "access";
 		remoteHostField = "remoteHost";
 		userField = "user";
 		timestampField = "timestamp";
 		virtualHostField = "virtualHost";
 		methodField = "method";
 		queryField = "query";
 		statusField = "status";
 		bytesField = "bytes";
 		refererField = "referer";
 		userAgentField = "userAgent";
 		pattern = "common";
 		resolveHosts = false;
 

Method Detail

setDriverName

public void setDriverName(java.lang.String driverName)
Sets the database driver name.

Parameters:
driverName - The complete name of the database driver class.

setConnectionURL

public void setConnectionURL(java.lang.String connectionURL)
Sets the JDBC URL for the database where the log is stored.

Parameters:
connectionURL - The JDBC URL of the database.

setTableName

public void setTableName(java.lang.String tableName)
Sets the name of the table where the logs are stored.

Parameters:
tableName - The name of the table.

setRemoteHostField

public void setRemoteHostField(java.lang.String remoteHostField)
Sets the name of the field containing the remote host.

Parameters:
remoteHostField - The name of the remote host field.

setUserField

public void setUserField(java.lang.String userField)
Sets the name of the field containing the remote user name.

Parameters:
userField - The name of the remote user field.

setTimestampField

public void setTimestampField(java.lang.String timestampField)
Sets the name of the field containing the server-determined timestamp.

Parameters:
timestampField - The name of the server-determined timestamp field.

setVirtualHostField

public void setVirtualHostField(java.lang.String virtualHostField)
Sets the name of the field containing the virtual host information (this is in fact the server name).

Parameters:
virtualHostField - The name of the virtual host field.

setMethodField

public void setMethodField(java.lang.String methodField)
Sets the name of the field containing the HTTP request method.

Parameters:
methodField - The name of the HTTP request method field.

setQueryField

public void setQueryField(java.lang.String queryField)
Sets the name of the field containing the URL part of the HTTP query.

Parameters:
queryField - The name of the field containing the URL part of the HTTP query.

setStatusField

public void setStatusField(java.lang.String statusField)
Sets the name of the field containing the HTTP response status code.

Parameters:
statusField - The name of the HTTP response status code field.

setBytesField

public void setBytesField(java.lang.String bytesField)
Sets the name of the field containing the number of bytes returned.

Parameters:
bytesField - The name of the returned bytes field.

setRefererField

public void setRefererField(java.lang.String refererField)
Sets the name of the field containing the referer.

Parameters:
refererField - The referer field name.

setUserAgentField

public void setUserAgentField(java.lang.String userAgentField)
Sets the name of the field containing the user agent.

Parameters:
userAgentField - The name of the user agent field.

setPattern

public void setPattern(java.lang.String pattern)
Sets the logging pattern. The patterns supported correspond to the file-based "common" and "combined". These are translated into the use of tables containing either set of fields.

TO DO: more flexible field choices.

Parameters:
pattern - The name of the logging pattern.

setResolveHosts

public void setResolveHosts(java.lang.String resolveHosts)
Determines whether IP host name resolution is done.

Parameters:
resolveHosts - "true" or "false", if host IP resolution is desired or not.

invoke

public void invoke(Request request,
                   Response response,
                   ValveContext context)
            throws java.io.IOException,
                   javax.servlet.ServletException
This method is invoked by Tomcat on each query.

Specified by:
invoke in interface Valve
Specified by:
invoke in class ValveBase
Parameters:
request - The Request object.
response - The Response object.
context - The ValveContext object.
Throws:
java.io.IOException - Should not be thrown.
javax.servlet.ServletException - Database SQLException is wrapped in a ServletException.

addLifecycleListener

public void addLifecycleListener(LifecycleListener listener)
Adds a Lifecycle listener.

Specified by:
addLifecycleListener in interface Lifecycle
Parameters:
listener - The listener to add.

findLifecycleListeners

public LifecycleListener[] findLifecycleListeners()
Get the lifecycle listeners associated with this lifecycle. If this Lifecycle has no listeners registered, a zero-length array is returned.

Specified by:
findLifecycleListeners in interface Lifecycle

removeLifecycleListener

public void removeLifecycleListener(LifecycleListener listener)
Removes a Lifecycle listener.

Specified by:
removeLifecycleListener in interface Lifecycle
Parameters:
listener - The listener to remove.

start

public void start()
           throws LifecycleException
Invoked by Tomcat on startup. The database connection is set here.

Specified by:
start in interface Lifecycle
Throws:
LifecycleException - Can be thrown on lifecycle inconsistencies or on database errors (as a wrapped SQLException).

stop

public void stop()
          throws LifecycleException
Invoked by tomcat on shutdown. The database connection is closed here.

Specified by:
stop in interface Lifecycle
Throws:
LifecycleException - Can be thrown on lifecycle inconsistencies or on database errors (as a wrapped SQLException).

getCurrentTimeMillis

public long getCurrentTimeMillis()


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