ejbhome

How do entity beans perform global operations that aren’t specific to any single entity instance, such as counting total accounts or calculating aggregate values across the entire database?

ejbHome() methods are business methods that operate on the entity bean class as a whole, not on specific entity instances. They run while the bean is still in the pool, with no specific data loaded.

• Client calls a home method on the home interface (e.g., getTotalBankValue())
• Container delegates to the bean’s ejbHome<MethodName>() method
• Method executes global SQL queries (e.g., SELECT COUNT(*) FROM accounts)
• Method returns result to client
• Bean remains in the pool—no specific data instance is associated

• Called from Home Interface but implemented in the bean class
• Prefix is ejbHome followed by method name
• Runs while bean is in pool, not in ready state
• Can perform aggregate operations across all entities

• Built from: Entity Bean, Home Interface
• Related: Finder Methods, JDBC

• Cannot call getPrimaryKey() in home methods—bean has no identity
• Don’t confuse with instance-specific business methods