Ehcache pre invalidating space

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We’ve defined the time-to-live (TTL) to be 15 minutes (900 seconds) in eh-cache.xml: time To Idle Seconds: Sets the time to idle for an element before it expires.

In other words, the maximum amount of time between accesses before an element expires is only used if the element is not eternal.

The query cache is used to store the result set of a query made against the database.

The key of the query cache contains the query string itself and any bind parameters passed with the query.

So we dived into the source of the used hibernate release (the 3.3.1 bundled with grails 1.3.5) and browsed the hibernate issue tracker.

We found the issue and correlated it to the issues HHH-3339 and HHH-5210.

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For Hibernate to cache a given query result, we need to explicitly set the cachable query attribute when creating the Query.Optional attribute — a value of 0 means that an element can idle for infinity. time To Live Seconds: Sets the time to live for an element before it expires.In other words, the maximum time between creation time and when an element expires is only used if the element is not eternal.Cacheable Result [email protected] value: [5872026465492992, 1] Jdbc Transaction - committed JDBC Connection ------------------------------------------------------------ Query Cache Test - Check get entity is cached Jdbc Transaction - committed JDBC Connection ------------------------------------------------------------ Query Cache Test - Check query is cached Standard Query Cache - Checking cached query results in region: org.hibernate.cache.internal.Standard Query Cache Standard Query Cache - Checking query spaces are up-to-date: [Post] Ehcache General Data Region - key: Post Update Timestamps Cache - [Post] last update timestamp: 5872026465406976, result set timestamp: 5872026465492992 Standard Query Cache - Returning cached query results Jdbc Transaction - committed JDBC Connection Ehcache General Data Region - key: sql: select querycache0_as id1_1_, querycache0_.author_id as author_i4_1_, querycache0_.created_on as created_2_1_, querycache0_as name3_1_ from Post querycache0_ inner join Author querycache1_ on querycache0_.author_id=querycache1_where querycache1_.id=?

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