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