java - Glassfish: Silently ignore unavailable data source at application start up -

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i have ejb application uses jpa 2.0 on glassfish 3.1.2 (provider eclipselink). when database down application not start , more: can't deployed. because eclipselink initial verification.

is there way application can deloyed , started if database down?

background: resource being unavailable comes not play until first business function called accesses database. application startup till first business function call there time window database may started.

changing defaults in glassfish-resources.xml attributes connection-creation-retry-attempts , connection-creation-retry-interval-in-seconds of <jdbc-connection-pool> helps in way still check database availabilty @ startup not @ first use.

exceptionhandler eclipselink not way have in mind: when exception handler comes play eclipselink has started verification process , hence has tried connect database. way looking postpone verfification process until first business call.

eclipselink database verification is performed @ first use. however, first use @persistanceunit injection point handled container. @persistanceunit injection handled @ deployment time, , there's nothing can catch that. if don't want eclipselink verify @ deployment time, you'll need handle own entitymanagerfactory.

i'd recommend creating application context listener, can hold copy of entitymanagerfactory, , perform tear down when undeploy/redeploy. during normal run can not set until needed. here's basic model follow: https://en.wikipedia.org/wiki/initialization-on-demand_holder_idiom


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