I will appreciate any help I can get with the following critical issue:
In the code below ...
| private void populateCache() {
| Person person = new Person("Chris","Harris",32);
| PojoCache pojoCache =
PojoCacheFactory.createCache("META-INF/service.xml", true);
| pojoCache.attach("/cachedobjects/person", person);
| Person dummyPerson = (Person)pojoCache.find("/cachedobjects/person");
| log.info("Name = " + dummyPerson.getName());
| }
|
| private void displayCacheContents() {
| PojoCache pojoCache =
PojoCacheFactory.createCache("META-INF/service.xml");
| Person person = (Person)pojoCache.find("/cachedobjects/person");
| log.info("Name = " + person.getName());
| }
|
| public static void main(String args[]) {
| MyApp app = new MyApp();
| myApp.populateCache();
| myApp.displayCacheContents();
| }
|
... why does all the code in populateCache() execute successfully (it creates
an instance of Person, creates an instance of the cache, attaches the object to
the cache, finds the object in the cache and then prints out one of its values
via a getter), but the code in displayCacheContents() fails with a
NullPointerException at the point where the getter is used (which means an
instance of Person is never retrieved from the cache).
I would have thought that the cache would be globally accessible, but it seems
that the cache looses its contents as soon as a cache instance goes out of
scope. I have created a Singleton that passes back an instance of the PojoCache
as a workaround, but this creates other issues, such as that changes on objects
do not get propagated to other servers in the cluster.
Thanks for your time and help.
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