Help is available for each task.

Task 1

Design a MusicCD remote interface and a MusicCDHome home interface. The MusicCD bean must encapsulate the persistent fields upc, title, artist, type, and price, so the MusicCD remote interface should define accessors and mutators for these persistent fields. The MusicCDHome interface should define a findByPrimaryKey() method which accepts a String argument for the upc, and a create() method that accepts a upc.

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Remember that all of the methods in the remote interface must throw RemoteException and that the create() methods in the home interface must return an object of type MusicCD.

Task 2

Code the MusicCDBean entity bean implementation class. You need to provide implementations for all the methods defined in the remote interface, plus you need to implement all the methods defined in the EntityBean interface. You also need to provide an implementation of ejbCreate() with the same number and datatypes of arguments as you defined in the create() method of your home interface.

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MusicCDHome should prescribe a single bean-creation method with the signature:

public MusicCD create(String upc)
               throws CreateException, RemoteException;

but the implementation of this in the bean class must return null in the case of container-managed persistence.

Because MusicCDBean is an implementation of an entity bean, it has a primary key and it must have a creation methods with arguments to initialize the key: create() and ejbCreate().

Task 3

Compile all the classes that compose your bean.

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Don't forget that the compiler needs to be able to find the javax.ejb classes, which are in J2EE_HOME/j2ee.jar. You may use the following command to compile:

javac -classpath %CLASSPATH%;%J2EE_HOME%\lib\j2ee.jar;. musicstore\*.java

Task 4

Package your entity bean into a jar file, using the provided XML deployment descriptor.

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Execute the command jar cvf MusicCD.jar musicstore\*.class META-INF\ejb-jar.xml to create the jar file.

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