Version 1.0-SNAPSHOT

 

Author: Michael Plöd

 

 

Date	Author	Description
Dec. 4th 2007	Michael Plöd	Initial Version

 

Statsviewer is an open source tool that enables the user to monitor Hibernate‘s ™  Performance at Runtime. Statsviewer does this by scanning the global JNDI namespace for Hibernate ™ Persistence Contexts and then aggregating all data through Hibernate‘s ™ statistics. In addition to that Statsviewer is also able to parse the SQL and Type log categories for an excellent overview of all the queries that Hibernate ™ sent to the database.

 

The installation of Statsviewer is straightforward. All you need to do is to unzip the war file that is contained in the distribution to the deployment directory of your JBoss ™ Server.

 

If you want to analyze the SQL Queries and the values of the bind variables for each query you need to make sure that you enable the logging of Hibernate ™ on TRACE level for the categories org.hibernate.SQL and org.hibernate.type. The following log4j.xml example is a good starting point for further customizations:

 

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

<!--

    | For more configuration infromation and examples see the

-->

<log4j:configuration

       debug="false">

    <appender name="HIBERNATE"

       class="org.apache.log4j.DailyRollingFileAppender">

        <param name="File"

               value="${path.to.server.log.dir}/hibernate.log" />

        <param name="Append" value="false" />

 

        <param name="DatePattern" value="'.'yyyy-MM-dd" />

 

        <layout class="org.apache.log4j.PatternLayout">

            <param name="ConversionPattern"

                   value="%d %-5p [%c] %m%n" />

        </layout>

    </appender>

 

    <!-- ============================== -->

    <!-- Append messages to the console -->

    <!-- ============================== -->

    <appender name="CONSOLE"

       class="org.apache.log4j.ConsoleAppender">

        <param name="Target" value="System.out" />

        <param name="Threshold" value="DEBUG" />

 

        <layout class="org.apache.log4j.PatternLayout">

            <param name="ConversionPattern"

                value="%d{ABSOLUTE} %-5p [%c{1}] %m%n" />

        </layout>

    </appender>

 

    <category name="org.hibernate.jbdc" additivity="false">

        <priority value="TRACE" />

        <appender-ref ref="HIBERNATE" />

    </category>

    <category name="org.hibernate.SQL" additivity="false">

        <priority value="TRACE" />

        <appender-ref ref="HIBERNATE" />

    </category>

 

    <root>

        <appender-ref ref="CONSOLE" />

    </root>

</log4j:configuration>

 

In addition to a proper log4j configuration you will also have to configure the path to your Hibernate log file in the statsviewer.properties file which is located in the WEB-INF/classes folder.

 

After deploying the war file to the deployment directory of your JBoss ™ installation you can verify that everything is ok by accessing

http://[url of your server]:[http port]/statsviewer-1.0-SNAPSHOT

for example:

 

Finally you should see a screen that looks like this one:

 

Using Statsviewer is straightforward. You have several views on the statistics of Hibernate™:

Statsviewer is in an early BETA phase right now and the list of features is not frozen yet for the final release. Here is a list of features that are in the pipeline for the GA release:

 

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