EJB 2.0 are very complex, difficult to learn/use. Uses methods like &qu

what s the difference b/w EJB 2.0 and EJB 3.0 technically

Question Posted / nidhi aggarwal

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Answer Posted / nidhi aggarwal

EJB 2.0 are very complex, difficult to learn/use. Uses
methods
like "ejbPassivate", "ejbActivate", "ejbLoad", "ejbStore".
Needs a deployment descriptor.

In EJB 3.0 methods
like "ejbPassivate", "ejbActivate", "ejbLoad", "ejbStore"
are removed. Annotations are provided. In EJB 3.0, we donot
need deployment descriptor. POJO(Plain old java object) are
introduced. For defining any relationship 1:1, 1:N, N:1,
M:N we have annitations.

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