EhCache Configuration in Replicated Mode

In cluster environments, you can configure EhCache in two different topologies, one is distributed, and the other is replicated. In replicated mode, each EhCache instance in the network acts as a peer. There is no master cache. Instances communicated with each other via multicast network messages through RMI. Configuration of EhCache in replicated mode is […]

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Hibernate Events and Custom EventListener Registration

Since Hibernate 3, each and every operation through Session API fires one or more persistence events during the course of its execution. For example, when you invoke session.get(Foo.class,1L), in order to fetch Foo entity with PK 1, Hibernate fires events with pre-load, load and post-load event types. There is a seperate EventListener interface for each […]

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Is It Possible To Change Entity Fetch Strategy During Hibernate Merge?

When I talk with my colleague¬†about my experience with Hibernate merge behavior on lazy associations with¬†cascade type merge, he suggested me to check if Hibernate allows us to change fetch logic it applies on detached entities during merge operation. That way, it would be possible to suppress eager initialization of those associations during merge. Hibernate […]

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Hibernate Merge may Cause EAGER Initialization of LAZY OneToOne Associations

Let’s have following two simple entities, having 1:1 lazy association between each other. @Entity @Table(name=”T_FOO”) public class Foo { @Id @GeneratedValue private Long id; @OneToOne(fetch = FetchType.LAZY, cascade = CascadeType.MERGE) @JoinColumn(name = “bar_id”) private Bar bar; public Long getId() { return id; } public Bar getBar() { return bar; } public void setBar(Bar bar) { […]

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