Custom Logging

The Teiid system provides a wealth of information using logging. To control logging level, contexts, and log locations, you should be familiar with container’s standalone.xml or domain.xml configuration file and check out "logging" subsystem. Refer to the Administrator’s Guide for more details about different Teiid contexts available.

If you want a custom log handler, follow the directions to write a custom java.util.logging.Handler. If you develop a custom logging Handler, the implementation class along should be placed as a jar in "org.jboss.teiid" module and define its name in the module.xml file as part of the module along with any dependencies it may need. See below.

Command Logging API

If you want to build a custom handler for command logging that will have access to java.util.logging LogRecords to the "COMMAND_LOG" context, the handler will receive a instance of LogRecord message, this object will contain a parameter of type org.teiid.logging.CommandLogMessage. The relevant Teiid classes are defined in the teiid-api-10.0.0.Final.jar. The CommmdLogMessage includes information about vdb, session, command sql, etc. CommandLogMessages are logged at the INFO (user queries), DEBUG (source queries), and TRACE (query plan) levels.

Sample CommandLogMessage Usage
package org.something;
import java.util.logging.Handler;
import java.util.logging.LogRecord;

public class CommandHandler extends Handler {
    @Override
    public void publish(LogRecord record) {
    CommandLogMessage msg = (CommandLogMessage)record.getParameters()[0];
        //log to a database, trigger an email, etc.
    }

    @Override
    public void flush() {
    }

    @Override
    public void close() throws SecurityException {
    }
}

Audit Logging API

If you want to build a custom handler for command logging that will have access to java.util.logging LogRecords to the "AUDIT_LOG" context, the handler will receive a instance of LogRecord message, this object will contain a parameter of type org.teiid.logging.AuditMessage. The AuditMessage includes information about user, the action, and the target(s) of the action. The relevant Teiid classes are defined in the teiid-api-10.0.0.Final.jar. AuditMessages are logged at the DEBUG level. AuditMessages are used for both data role validation and for logon/logoff events. Only logon events will contain LogonInfo.

Sample AuditMessage Usage
package org.something;
import java.util.logging.Handler;
import java.util.logging.LogRecord;

public class AuditHandler extends Handler {
    @Override
    public void publish(LogRecord record) {
    AuditMessage msg = (AuditMessage)record.getParameters()[0];
        //log to a database, trigger an email, etc.
    }

    @Override
    public void flush() {
    }

    @Override
    public void close() throws SecurityException {
    }
}

Configuration

Now that you have developed a custom handler class, now package implementation in Jar file, then copy this Jar file into <jboss-as7>/modules/org/jboss/teiid/main folder, and edit module.xml file in the same directory and add

   <resource-root path="{your-jar-name}.jar" />

then use the cli to update the logging configuration, such as shown with the auditcommand scripts in the bin/scripts directory or edit standalone-teiid.xml or domain.xml file by locating the "logging" subsystem and add the following entries:

   <custom-handler name="COMMAND" class="org.teiid.logging.CommandHandler"
     module="org.jboss.teiid">
   </custom-handler>

   ..other entries

   <logger category="org.teiid.COMMAND_LOG">
       <level name="DEBUG"/>
       <handlers>
           <handler name="COMMAND"/>
       </handlers>
   </logger>

Change the above configuration accordingly for AuditHandler, if you are working with Audit Messages.

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