Examples with JDOPersistenceManager org.datanucleus.api.jdo.JDOPersistenceManager used on opensource projects

Example 1 with JDOPersistenceManager

use of org.datanucleus.api.jdo.JDOPersistenceManager in project hive by apache.

the class TestHiveMetaStore method getJDOPersistanceManagerCacheSize.

private static int getJDOPersistanceManagerCacheSize() {
    JDOPersistenceManagerFactory jdoPmf;
    Set<JDOPersistenceManager> pmCacheObj;
    Field pmCache;
    Field pmf;
    try {
        pmf = ObjectStore.class.getDeclaredField("pmf");
        if (pmf != null) {
            pmf.setAccessible(true);
            jdoPmf = (JDOPersistenceManagerFactory) pmf.get(null);
            pmCache = JDOPersistenceManagerFactory.class.getDeclaredField("pmCache");
            if (pmCache != null) {
                pmCache.setAccessible(true);
                pmCacheObj = (Set<JDOPersistenceManager>) pmCache.get(jdoPmf);
                if (pmCacheObj != null) {
                    return pmCacheObj.size();
                }
            }
        }
    } catch (Exception ex) {
        System.out.println(ex);
    }
    return -1;
}