Overview
As noted in the Injection of env-entry Example, the EJB 3.0 supported env-entry types are fairly limited. Also the use of several <env-entry> tags in an ejb-jar.xml can get a bit verbose.
OpenEJB does not restrict you to just these data types or require you to use an ejb-jar.xml to declare them.
- @Resource can be used on any type for which there is java.beans.PropertyEditor
- You may install your own PropertyEditors and package them with your app.
- Java Generics are supported (e.g. List<URI> myURIs)
- You may use a META-INF/env-entries.properties file as an alternative to an ejb-jar.xml
See Built-in Type Converters for a full list of supported env-entry types.
The source for this example is the "custom-injection" directory located in the openejb-examples.zip available on the download page.
The Code
Bean Class
{snippet:id=code|url=openejb3/examples/custom-injection/src/main/java/org/superbiz/enventries/StratocasterImpl.java|lang=java}
{snippet:id=props|url=openejb3/examples/custom-injection/src/main/resources/META-INF/env-entries.properties|lang=none}
The Custom Type and Editor
Support for java.lang.Enum types is already built-in, but we've decided we'd like to allow abbreviated versions of the enum constants to be usable. We do this by creating a custom PropertyEditor for our Pickup enum like so:
{snippet:id=code|url=openejb3/examples/custom-injection/src/main/java/org/superbiz/enventries/PickupEditor.java|lang=java}
We cleverly install this PropertyEditor in a static block in the Pickup class that will be executed should someone actually reference the Pickup type.
{snippet:id=code|url=openejb3/examples/custom-injection/src/main/java/org/superbiz/enventries/Pickup.java|lang=java}
Test Case
{snippet:id=code|url=openejb3/examples/custom-injection/src/test/java/org/superbiz/enventries/StratocasterTest.java|lang=java}
Running it
Running the example is fairly simple. In the "custom-injection" directory of the examples zip, just run:
$ mvn clean install
Which should create output like the following.
-------------------------------------------------------
T E S T S
-------------------------------------------------------
Running org.superbiz.enventries.StratocasterTest
Apache OpenEJB 3.1-SNAPSHOT build: 20080409-12:05
http://openejb.apache.org/
INFO - openejb.home = /Users/dblevins/work/openejb3/examples/custom-injection
INFO - openejb.base = /Users/dblevins/work/openejb3/examples/custom-injection
INFO - Configuring Service(id=Default Security Service, type=SecurityService, provider-id=Default Security Service)
INFO - Configuring Service(id=Default Transaction Manager, type=TransactionManager, provider-id=Default Transaction Manager)
INFO - Configuring Service(id=Default JDK 1.3 ProxyFactory, type=ProxyFactory, provider-id=Default JDK 1.3 ProxyFactory)
INFO - Found EjbModule in classpath: /Users/dblevins/work/openejb3/examples/custom-injection/target/classes
INFO - Configuring app: /Users/dblevins/work/openejb3/examples/custom-injection/target/classes
INFO - Configuring Service(id=Default Stateless Container, type=Container, provider-id=Default Stateless Container)
INFO - Auto-creating a container for bean StratocasterImpl: Container(type=STATELESS, id=Default Stateless Container)
INFO - Loaded Module: /Users/dblevins/work/openejb3/examples/custom-injection/target/classes
INFO - Assembling app: /Users/dblevins/work/openejb3/examples/custom-injection/target/classes
INFO - Jndi(name=StratocasterImplLocal) --> Ejb(deployment-id=StratocasterImpl)
INFO - Created Ejb(deployment-id=StratocasterImpl, ejb-name=StratocasterImpl, container=Default Stateless Container)
INFO - Deployed Application(path=/Users/dblevins/work/openejb3/examples/custom-injection/target/classes)
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.705 sec
Results :
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
