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System Properties

You can find a list of properties here. But read on to understand how these can be used.

Overriding openejb.xml

Anything in the openejb.xml file can be overridden via system properties of the format:

-D<id>.<property-name>=<property-value>

..where id is the value in the config file for example:

<Connector id="mysql">
    JdbcDriver com.mysql.jdbc.Driver
    JdbcUrl jdbc:mysql://localhost/test
    UserName test
</Connector>

Could be overridden as follows via system properties on the command line:

/bin/openejb start -Dmysql.JdbcDriver=com.mysql.jdbc.Driver

-Dmysql.JdbcUrl=jdbc:mysql://localhost/test -Dmysql.UserName=test

Overriding Server Services

Any server service installed into OpenEJB can be overridden in the same fashion as things in the openejb.xml file.

For example, when OpenEJB starts it prints out the following:

  ** Starting Services **
  NAME             IP          PORT
  httpejbd         0.0.0.0         4204
  telnet           0.0.0.0         4202
  ejbd             0.0.0.0         4201
  hsql             0.0.0.0         9001
  activemq         127.0.0.1       4206
  derbynet         0.0.0.0         4205
  admin thread         0.0.0.0         4200

Each of those has the same standard xinet.d-like properties which can also be configured as such:

-D<id>.<property-name>=<property-value>

  1. where 'id' is the name of the server service and 'property-name' is one of the following: bind, port, threads, disabled, only_from.

So to set the address and port the ejbd service will bind to, simply specify this on the command line:

./bin/openejb start -Dejbd.bind=192.168.1.12 -Dejbd.port=9988