org.javasimon.jdbcx.package-info Maven / Gradle / Ivy
/**
* Simon DataSources for JavaEE JDBC monitoring.
*
* Basic principle behind Java Simon implementation of DataSources for JDBC monitoring inside JavaEE
* compliant application servers is mostly similar like in case of JavaSE JDBC monitoring. With same
* principle in mind, each datasource delegates all its calls to real datasource implementation. Retrieving
* real datasource is made by JavaSimon datasource, which in this case acts similar like application server.
* Application server creates datasource form configuration held in its JNDI. First, application server
* creates Java Simon datasource instance and then it pushes all properties from JNDI into datasource
* instance. Then, when datasource within application is called, Java Simon datasource creates real
* datasource instance and pushes all retrieved properties form application server into new real datasource
* instance.
*
* So, for correct settings of JavaSimon datasource, it is need to know wanted datasource type (normal,
* connection pool or XA), implementation class of real datasource and real datasource properties of course.
* By datasource type, there are three different Java Simon datasource implementation for each type:
*
* - {@link org.javasimon.jdbcx.SimonDataSource} for ordinary or non-XA datasource (implements
* {@link javax.sql.DataSource}),
* - {@link org.javasimon.jdbcx.SimonConnectionPoolDataSource} for connection pool datasource with pooling
* connections feature (implements {@link javax.sql.ConnectionPoolDataSource}),
* - and {@link org.javasimon.jdbcx.SimonDataSource} for XA datasource with two-phase commits feature (implements
* {@link javax.sql.XADataSource}).
*
* Implementation class of real datasource is then important for creating right datasource instance by Java Simon
* datasource, property realDataSourceClassName.
*
* Not all datasource types are supported with all their possible properties. At the moment only following
* properties are supported: url, user, password. These should still be enough for
* almost all important datasource implementations (Oracle thin, PostgreSQL, H2, MySQL, ...). Other datasource
* types (e.g. Oracle OCI case) will be added in the future as needed/requested.
*/
package org.javasimon.jdbcx;