Storing lifecycle listebers and callbacks in the *.map.xml and loading them back
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Key: CAY-879
URL: https://issues.apache.org/cayenne/browse/CAY-879
Project: Cayenne
Issue Type: Task
Components: Cayenne Core Library
Affects Versions: 3.0
Reporter: Andrus Adamchik
Assignee: Andrus Adamchik
Fix For: 3.0
DataMap and ObjEntity classes support mapping lifecycle callbacks, however
there is no support for loading them from XML and storing them back to XML.
Here is what needs to be done to achieve that:
1. XML Format Additions (applicable for DataMap XML files - *.map.xml)
* new "entity-listener" tag as a child of "obj-entity", describing callbacks on
listener classes separate from the entity class. The tag itself is compatible
with JPA spec. Here is an example:
<obj-entity ...>
...
<entity-listener class="mylistenerclass">
<pre-persist method-name="abc"/>
<post-update method-name="xyz"/>
</entity-listener>
</obj-entity>
* new callback tags - children of "obj-entity", describing callbacks on the
entity class itself. The tags are compatible with JPA spec. Here is an example:
<obj-entity ...>
...
<pre-persist method-name="abc"/>
<post-update method-name="xyz"/>
</obj-entity>
* new "obj-entity" tag attributes: "exclude-superclass-listeners",
"exclude-default-listeners".
* new "entity-listener" tag as a child of "data-map", describing default
callbacks on all entities. Format is the same as for the "obj-entity":
<data-map ...>
...
<entity-listener class="mylistenerclass">
<pre-persist method-name="abc"/>
<post-update method-name="xyz"/>
</entity-listener>
</data-map>
* Implement listener saving in DataMap.encodeAsXML(..)
* Implement listener and callback saving in ObjEntity.encodeAsXML
* Implement listener and callback loading in MapLoader.
* Write unit tests
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