I just sent a pull request with the first cut of the implementation. My plan is
to try this new implementation with my audit system and if it works well, apply
it to master (hopefully by then CAY-2028 will also be ready). The
implementation I ended up with does not have JSON serialization. Just pure
objects. Here is how it works:
1. Write a listener (currently requires an interface, but if needed we can
easily switch to annotations) :
public class L implements PostCommitListener {
@Override
public void onPostCommit(ObjectContext originatingContext, ChangeMap
changes) {
// do something with your changes
}
}
2. Configure Cayenne stack with "PostCommit" module:
Module m = PostCommitModuleBuilder.builder().listener(L1.class);
ServerRuntime r = ServerRuntimeBuilder
.builder()
.addConfig("cayenne-lifecycle.xml")
.addModule(m)
.build();
PostCommitModuleBuilder supports a few non-default options, such as excluding
entities, entity properties, and hiding "confidential" property values, such as
passwords using the existing @Auditable annotation. Or you can write a custom
PostCommitEntityFactory to support your own annotations.
TODO: there is not support for @AuditableChild yet. Need to think how to better
handle this one.
Comments are welcomed.
Andrus
