42 lines
1.4 KiB
Java
42 lines
1.4 KiB
Java
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public interface PerfStatistics {
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String getOpenJPAStatistics();
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String getEntityClasses();
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}
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@Stateless
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public class PerfStatisticsImpl implements PerfStatistics {
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@Inject
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private EntityManagerJPAFactory entityManagerFactory;
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private OpenJPAEntityManagerFactory openJPAEntityManagerFactory;
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@PostConstruct
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public void init() {
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openJPAEntityManagerFactory = OpenJPAPersistence.cast(entityManagerFactory.getEntityManager().getEntityManagerFactory());
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}
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@Override
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public String getOpenJPAStatistics() {
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StoreCache cache = openJPAEntityManagerFactory.getStoreCache();
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CacheStatistics st = cache.getStatistics();
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return String.format("{ \"ReadCount\": %d, \"HitCount\": %d, \"WriteCount\": %d }", st.getReadCount(), st.getHitCount(), st.getWriteCount());
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}
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@Override
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public String getEntityClasses() {
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StringBuilder res = new StringBuilder("{ \"Entities\": [");
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EntityManagerFactory emf = openJPAEntityManagerFactory;
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EntityManager em = emf.createEntityManager();
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Cache cache = emf.getCache();
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for(EntityType<?> entityType : em.getMetamodel().getEntities()) {
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Class<?> cls = entityType.getBindableJavaType();
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res.append(String.format("\"%s\", ", cls.getCanonicalName()));
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}
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res.append("\"\"], \"Cache\": \"");
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res.append(cache.toString());
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res.append("\" }");
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return res.toString();
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}
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}
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