Examples of org.datanucleus.ObjectManagerImpl

org.datanucleus.ObjectManagerImpl
Representation of an ObjectManager. An object manager provides management for the persistence of objects into a datastore and the retrieval of these objects using various methods.
Caching

An ObjectManager has its own Level 1 cache. This stores objects against their identity. The Level 1 cache is typically a weak referenced map and so cached objects can be garbage collected. Objects are placed in the Level 1 cache during the transaction. The ObjectManagerFactory also has a Level 2 cache. This is used to allow cross-communication between ObjectManagers. Objects are placed in the Level 2 cache during commit() of a transaction. If an object is deleted during a transaction then it will be removed from the Level 2 cache at commit(). If an object is no longer enlisted in the transaction at commit then it will be removed from the Level 2 cache (so we remove the chance of handing out old data).

Transactions

An ObjectManager has a single transaction (the "current" transaction). The transaction can be "active" (if begin() has been called on it) or "inactive".

Persisted Objects

When an object involved in the current transaction it is enlisted (calling enlistInTransaction()). Its' identity is saved (in "txEnlistedIds") for use later in any "persistenceByReachability" process run at commit. Any object that is passed via makePersistent() will be stored (as an identity) in "txKnownPersistedIds" and objects persisted due to reachability from these objects will also have their identity stored (in "txFlushedNewIds"). All of this information is used in the "persistence-by-reachability-at-commit" process which detects if some objects originally persisted are no longer reachable and hence should not be persistent after all.

    {
        emf = theEMF;
        persistenceContextType = contextType;


        // Allocate our ObjectManager
        om = new ObjectManagerImpl(nucleusCtx, new JPAPersistenceManager(this),
            nucleusCtx.getPersistenceConfiguration().getStringProperty("datanucleus.ConnectionUserName"),
            nucleusCtx.getPersistenceConfiguration().getStringProperty("datanucleus.ConnectionPassword"));


        if (nucleusCtx.getPersistenceConfiguration().getStringProperty("datanucleus.TransactionType").equalsIgnoreCase(
            TransactionType.RESOURCE_LOCAL.toString()))

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     * @param userName Username for the datastore
     * @param password Password for the datastore
     */
    public JDOPersistenceManager(JDOPersistenceManagerFactory apmf, String userName, String password)
    {
        om = new ObjectManagerImpl(apmf.getNucleusContext(), this, userName, password);
        this.pmf = apmf;
        userObject = null;
        userObjectMap = null;
        fetchPlan = new JDOFetchPlan(om.getFetchPlan());
        setTransaction(om.getTransaction());

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     * @userStory xyz
     */
    public void testMetadataCache() throws Exception {
        Object delegate = em.getDelegate();
        Assert.assertNotNull(delegate);
        ObjectManagerImpl om = (ObjectManagerImpl) delegate;
        ForceStoreSchemaHandler forceSH = (ForceStoreSchemaHandler) om.getStoreManager().getSchemaHandler();
        // Search for an entity that we know is used by the tests
        Assert.assertNotNull(forceSH.getTable("TestEntity"));
        // Search for an entity that we know is NOT used by the tests
        Assert.assertNull(forceSH.getTable("Task"));
    }

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     * @userStory xyz
     */
    public void testTransientFields() throws Exception {
        Object delegate = em.getDelegate();
        Assert.assertNotNull(delegate);
        ObjectManagerImpl om = (ObjectManagerImpl) delegate;
        ForceStoreSchemaHandler forceSH = (ForceStoreSchemaHandler) om.getStoreManager().getSchemaHandler();
        // Search for TestEntity
        TableImpl table = forceSH.getTable("TestEntity");
        Assert.assertNotNull(table.getColumnByForceApiName("lastModifiedDate"));
        Assert.assertNull(table.getColumnByForceApiName("unused"));
        // Do the same test with TestEntityMethodAnnotations

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    public void testNotNullFieldsInternal(EntityManager emm) throws Exception {
        deleteAll(RestrictedTestEntity.class);
        
        Object delegate = emm.getDelegate();
        Assert.assertNotNull(delegate);
        ObjectManagerImpl om = (ObjectManagerImpl) delegate;
        // Search for RestrictedTestEntity
        AbstractClassMetaData cmd =
            ((ForceStoreManager) om.getStoreManager()).getMetaDataManager()
                                    .getMetaDataForEntityName(RestrictedTestEntity.class.getSimpleName());
        Assert.assertFalse(cmd.getMetaDataForMember("requiredName").getColumnMetaData()[0].getAllowsNull());
        Assert.assertTrue(cmd.getMetaDataForMember("optionalName").getColumnMetaData()[0].getAllowsNull());
        // Do some CRUD operations
        RestrictedTestEntity entity = new RestrictedTestEntity();

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    public void testUniqueFieldsInternal(EntityManager emm, boolean allOrNothing) throws Exception {
        deleteAll(RestrictedTestEntity.class);
        
        Object delegate = emm.getDelegate();
        Assert.assertNotNull(delegate);
        ObjectManagerImpl om = (ObjectManagerImpl) delegate;
        // Search for RestrictedTestEntity
        AbstractClassMetaData cmd =
            ((ForceStoreManager) om.getStoreManager()).getMetaDataManager()
                                    .getMetaDataForEntityName(RestrictedTestEntity.class.getSimpleName());
        Assert.assertTrue(cmd.getMetaDataForMember("requiredName").getColumnMetaData()[0].getUnique());
        Assert.assertFalse(cmd.getMetaDataForMember("optionalName").getColumnMetaData()[0].getUnique());
        // Do some CRUD operations
        RestrictedTestEntity entity1 = new RestrictedTestEntity();

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     * @param userName Username for the datastore
     * @param password Password for the datastore
     */
    public JDOPersistenceManager(JDOPersistenceManagerFactory apmf, String userName, String password)
    {
        objectMgr = new ObjectManagerImpl(apmf, this, userName, password);
        this.pmf = apmf;
        userObject = null;
        userObjectMap = null;
        fetchPlan = new JDOFetchPlan(objectMgr.getFetchPlan());
        setTransaction(objectMgr.getTransaction());

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Related Classes of org.datanucleus.ObjectManagerImpl

com.force.sdk.jpa.SchemaMetaDataTest

org.datanucleus.api.ApiAdapter

org.datanucleus.api.jdo.JDOPersistenceManager

org.datanucleus.api.jpa.JPAEntityManager

org.datanucleus.cache.CachedPC

org.datanucleus.cache.Level2Cache

org.datanucleus.identity.IdentityKeyTranslator

org.datanucleus.identity.IdentityStringTranslator

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org.datanucleus.identity.SCOID

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Examples of org.datanucleus.ObjectManagerImpl

Caching

Transactions

Persisted Objects

Related Classes of org.datanucleus.ObjectManagerImpl