Added a convenience property to disable Ehcache from using blocking caches

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 5.1 EE SP3 (5.1.6), 5.2 EE SP1 (5.2.5)
• Fix Version/s: 5.1 EE SP4 (5.1.7), 5.2 EE SP2 (5.2.6)
• Component/s: None
• Labels: None
• Environment: All

A new convenience property has been added to portal(-ext).properties to disable Ehcache from using blocking caches.

#

1. Set this to true to allow Ehcache to use blocking caches. This improves
2. performance significantly by locking on keys instead of the entire cache.
3. The drawback is that threads can hang if the cache is not used properly.
4. Make sure that all queries that return a miss also immediately populate
5. the cache, or else other threads that are blocked on a query of that same
6. key will continue to hang. Reference Ehcache's BlockingCache for more
7. information.
   #
   ehcache.blocking.cache.allowed=true

Setting this property to false is equivalent to setting these three properties
permissions.object.blocking.cache
value.object.entity.blocking.cache
value.object.finder.blocking.cache
all to false.