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A CmpEntityContainer can be declared via xml in the <tomee-home>/conf/tomee.xml file or in a WEB-INF/resources.xml file using a declaration like the following. All properties in the element body are optional.

<Container id="myCmpEntityContainer" type="CMP_ENTITY">
    cmpEngineFactory = org.apache.openejb.core.cmp.jpa.JpaCmpEngineFactory

Alternatively, a CmpEntityContainer can be declared via properties in the <tomee-home>/conf/ file or via Java VirtualMachine -D properties. The properties can also be used when embedding TomEE via the jakarta.ejb.embeddable.EJBContainer API or InitialContext

myCmpEntityContainer = new://Container?type=CMP_ENTITY
myCmpEntityContainer.cmpEngineFactory = org.apache.openejb.core.cmp.jpa.JpaCmpEngineFactory

Properties and xml can be mixed. Properties will override the xml allowing for easy configuration change without the need for $\{} style variable substitution. Properties are not case sensitive. If a property is specified that is not supported by the declared CmpEntityContainer a warning will be logged. If a CmpEntityContainer is needed by the application and one is not declared, TomEE will create one dynamically using default settings. Multiple CmpEntityContainer declarations are allowed. # Supported Properties