Just to clarify my last comment. Keep in mind that putFromExternalRead()
always results from the following usage pattern:
Object state = readFromCache();
if ( state == null ) {
state = readFromExternal();
putIntoCache( state );
}
...
In Hibernate terms, readFromExternal is causing the data to get read from the
database because it was not found in the cache. That db-read data is always
the "truth" in a db-driven app...
The only way that data should not overwrite the current node data
(putIntoCache) is if suddenly there has been a write lock applied to the node
between readFromCache() and putIntoCache() being executed (which is the meaning
of my "intention lock" comment).
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