Examples with ObjectProvider org.datanucleus.state.ObjectProvider used on opensource projects

Example 26 with ObjectProvider

use of org.datanucleus.state.ObjectProvider in project datanucleus-core by datanucleus.

the class ExecutionContextImpl method evictObjects.

/**
 * Method to evict all objects of the specified type (and optionaly its subclasses) that are present in the L1 cache.
 * @param cls Type of persistable object
 * @param subclasses Whether to include subclasses
 */
public void evictObjects(Class cls, boolean subclasses) {
    if (cache != null) {
        Set<ObjectProvider> opsToEvict = new HashSet<>(cache.values());
        for (ObjectProvider op : opsToEvict) {
            Object pc = op.getObject();
            boolean evict = false;
            if (!subclasses && pc.getClass() == cls) {
                evict = true;
            } else if (subclasses && cls.isAssignableFrom(pc.getClass())) {
                evict = true;
            }
            if (evict) {
                op.evict();
                removeObjectFromLevel1Cache(getApiAdapter().getIdForObject(pc));
            }
        }
    }
}

Example 27 with ObjectProvider

use of org.datanucleus.state.ObjectProvider in project datanucleus-core by datanucleus.

the class ExecutionContextImpl method makeObjectTransient.

/**
 * Method to migrate an object to transient state.
 * @param obj The object
 * @param state Object containing the state of the fetch plan process (if any)
 * @throws NucleusException When an error occurs in making the object transient
 */
public void makeObjectTransient(Object obj, FetchPlanState state) {
    if (obj == null) {
        return;
    }
    try {
        clr.setPrimary(obj.getClass().getClassLoader());
        assertClassPersistable(obj.getClass());
        assertNotDetached(obj);
        if (NucleusLogger.PERSISTENCE.isDebugEnabled()) {
            NucleusLogger.PERSISTENCE.debug(Localiser.msg("010022", StringUtils.toJVMIDString(obj)));
        }
        if (getApiAdapter().isPersistent(obj)) {
            ObjectProvider op = findObjectProvider(obj);
            op.makeTransient(state);
        }
    } finally {
        clr.unsetPrimary();
    }
}

Example 28 with ObjectProvider

use of org.datanucleus.state.ObjectProvider in project datanucleus-core by datanucleus.

the class ExecutionContextImpl method attachObject.

/**
 * Method to attach a persistent detached object.
 * If a different object with the same identity as this object exists in the L1 cache then an exception
 * will be thrown.
 * @param ownerOP ObjectProvider of the owner object that has this in a field that causes this attach
 * @param pc The persistable object
 * @param sco Whether the PC object is stored without an identity (embedded/serialised)
 */
public void attachObject(ObjectProvider ownerOP, Object pc, boolean sco) {
    assertClassPersistable(pc.getClass());
    // Store the owner for this persistable object being attached
    // For the current thread
    Map attachedOwnerByObject = getThreadContextInfo().attachedOwnerByObject;
    if (attachedOwnerByObject != null) {
        attachedOwnerByObject.put(pc, ownerOP);
    }
    ApiAdapter api = getApiAdapter();
    Object id = api.getIdForObject(pc);
    if (id != null && isInserting(pc)) {
        // Object is being inserted in this transaction so just return
        return;
    } else if (id == null && !sco) {
        // Transient object so needs persisting
        persistObjectInternal(pc, null, null, -1, ObjectProvider.PC);
        return;
    }
    if (api.isDetached(pc)) {
        // Detached, so migrate to attached
        if (cache != null) {
            ObjectProvider l1CachedOP = cache.get(id);
            if (l1CachedOP != null && l1CachedOP.getObject() != pc) {
                // attached object with the same id already present in the L1 cache so cannot attach in-situ
                throw new NucleusUserException(Localiser.msg("010017", StringUtils.toJVMIDString(pc)));
            }
        }
        if (NucleusLogger.PERSISTENCE.isDebugEnabled()) {
            NucleusLogger.PERSISTENCE.debug(Localiser.msg("010016", StringUtils.toJVMIDString(pc)));
        }
        ObjectProvider op = nucCtx.getObjectProviderFactory().newForDetached(this, pc, id, api.getVersionForObject(pc));
        op.attach(sco);
    } else {
        // Not detached so can't attach it. Just return
        return;
    }
}

Example 29 with ObjectProvider

use of org.datanucleus.state.ObjectProvider in project datanucleus-core by datanucleus.

the class ExecutionContextImpl method close.

/**
 * Method to close the context.
 */
public void close() {
    if (closed) {
        throw new NucleusUserException(Localiser.msg("010002"));
    }
    if (tx.getIsActive()) {
        String closeActionTxAction = nucCtx.getConfiguration().getStringProperty(PropertyNames.PROPERTY_EXECUTION_CONTEXT_CLOSE_ACTIVE_TX_ACTION);
        if (closeActionTxAction != null) {
            if (closeActionTxAction.equalsIgnoreCase("exception")) {
                throw new TransactionActiveOnCloseException(this);
            } else if (closeActionTxAction.equalsIgnoreCase("rollback")) {
                NucleusLogger.GENERAL.warn("ExecutionContext closed with active transaction, so rolling back the active transaction");
                tx.rollback();
            }
        }
    }
    // Commit any outstanding non-tx updates
    if (!dirtyOPs.isEmpty() && tx.getNontransactionalWrite()) {
        if (isNonTxAtomic()) {
            // TODO Remove this when all mutator operations handle it atomically
            // Process as nontransactional update
            processNontransactionalUpdate();
        } else {
            // Process within a transaction
            try {
                tx.begin();
                tx.commit();
            } finally {
                if (tx.isActive()) {
                    tx.rollback();
                }
            }
        }
    }
    if (properties.getFrequentProperties().getDetachOnClose() && cache != null && !cache.isEmpty()) {
        // "Detach-on-Close", detaching all currently cached objects
        // TODO This will remove objects from the L1 cache one-by-one. Is there a possibility for optimisation? See also AttachDetachTest.testDetachOnClose
        NucleusLogger.PERSISTENCE.debug(Localiser.msg("010011"));
        List<ObjectProvider> toDetach = new ArrayList<>(cache.values());
        try {
            if (!tx.getNontransactionalRead()) {
                tx.begin();
            }
            for (ObjectProvider op : toDetach) {
                if (op != null && op.getObject() != null && !op.getExecutionContext().getApiAdapter().isDeleted(op.getObject()) && op.getExternalObjectId() != null) {
                    // If the object is deleted then no point detaching. An object can be in L1 cache if transient and passed in to a query as a param for example
                    try {
                        op.detach(new DetachState(getApiAdapter()));
                    } catch (NucleusObjectNotFoundException onfe) {
                    // Catch exceptions for any objects that are deleted in other managers whilst having this open
                    }
                }
            }
            if (!tx.getNontransactionalRead()) {
                tx.commit();
            }
        } finally {
            if (!tx.getNontransactionalRead()) {
                if (tx.isActive()) {
                    tx.rollback();
                }
            }
        }
        NucleusLogger.PERSISTENCE.debug(Localiser.msg("010012"));
    }
    // Call all listeners to do their clean up TODO Why is this here and not after "disconnect remaining resources" or before "detachOnClose"?
    ExecutionContext.LifecycleListener[] listener = nucCtx.getExecutionContextListeners();
    for (int i = 0; i < listener.length; i++) {
        listener[i].preClose(this);
    }
    closing = true;
    // Disconnect remaining resources
    if (cache != null && !cache.isEmpty()) {
        // Clear out the cache (use separate list since sm.disconnect will remove the object from "cache" so we avoid any ConcurrentModification issues)
        Collection<ObjectProvider> cachedOPsClone = new HashSet<>(cache.values());
        for (ObjectProvider op : cachedOPsClone) {
            if (op != null) {
                // Remove it from any transaction
                op.disconnect();
            } else {
                NucleusLogger.CACHE.error(">> EC.close L1Cache op IS NULL!");
            }
        }
        cache.clear();
        if (NucleusLogger.CACHE.isDebugEnabled()) {
            NucleusLogger.CACHE.debug(Localiser.msg("003011"));
        }
    } else {
    // TODO If there is no cache we need a way for ObjectProviders to be disconnected; have ObjectProvider as listener for EC close? (ecListeners below)
    }
    // Clear out lifecycle listeners that were registered
    closeCallbackHandler();
    if (ecListeners != null) {
        // Inform all interested parties that we are about to close
        Set<ExecutionContextListener> listeners = new HashSet<>(ecListeners);
        for (ExecutionContextListener lstr : listeners) {
            lstr.executionContextClosing(this);
        }
        ecListeners.clear();
        ecListeners = null;
    }
    // Reset the Fetch Plan to its DFG setting
    fetchPlan.clearGroups().addGroup(FetchPlan.DEFAULT);
    if (statistics != null) {
        statistics.close();
        statistics = null;
    }
    enlistedOPCache.clear();
    dirtyOPs.clear();
    indirectDirtyOPs.clear();
    if (nontxProcessedOPs != null) {
        nontxProcessedOPs.clear();
        nontxProcessedOPs = null;
    }
    if (managedRelationsHandler != null) {
        managedRelationsHandler.clear();
    }
    if (l2CacheTxIds != null) {
        l2CacheTxIds.clear();
    }
    if (l2CacheTxFieldsToUpdateById != null) {
        l2CacheTxFieldsToUpdateById.clear();
    }
    if (pbrAtCommitHandler != null) {
        pbrAtCommitHandler.clear();
    }
    if (opEmbeddedInfoByOwner != null) {
        opEmbeddedInfoByOwner.clear();
        opEmbeddedInfoByOwner = null;
    }
    if (opEmbeddedInfoByEmbedded != null) {
        opEmbeddedInfoByEmbedded.clear();
        opEmbeddedInfoByEmbedded = null;
    }
    if (opAssociatedValuesMapByOP != null) {
        opAssociatedValuesMapByOP.clear();
        opAssociatedValuesMapByOP = null;
    }
    l2CacheObjectsToEvictUponRollback = null;
    closing = false;
    closed = true;
    // Close the transaction
    tx.close();
    tx = null;
    owner = null;
    if (NucleusLogger.PERSISTENCE.isDebugEnabled()) {
        NucleusLogger.PERSISTENCE.debug(Localiser.msg("010001", this));
    }
    // Hand back to the pool for reuse
    nucCtx.getExecutionContextPool().checkIn(this);
}

Example 30 with ObjectProvider

use of org.datanucleus.state.ObjectProvider in project datanucleus-core by datanucleus.

the class ExecutionContextImpl method findObjectsById.

/**
 * Accessor for objects with the specified identities.
 * @param identities Ids of the object(s).
 * @param validate Whether to validate the object state
 * @return The Objects with these ids (same order)
 * @throws NucleusObjectNotFoundException if an object doesn't exist in the datastore
 */
public Object[] findObjectsById(Object[] identities, boolean validate) {
    if (identities == null) {
        return null;
    } else if (identities.length == 1) {
        return new Object[] { findObject(identities[0], validate, validate, null) };
    }
    for (int i = 0; i < identities.length; i++) {
        if (identities[i] == null) {
            throw new NucleusUserException(Localiser.msg("010044"));
        }
    }
    // Set the identities array
    Object[] ids = new Object[identities.length];
    for (int i = 0; i < identities.length; i++) {
        // Translate the identity if required
        if (identities[i] instanceof String) {
            IdentityStringTranslator idStringTranslator = getNucleusContext().getIdentityManager().getIdentityStringTranslator();
            if (idStringTranslator != null) {
                // DataNucleus extension to translate input identities into valid persistent identities.
                ids[i] = idStringTranslator.getIdentity(this, (String) identities[i]);
                continue;
            }
        }
        ids[i] = identities[i];
    }
    Map pcById = new HashMap(identities.length);
    List idsToFind = new ArrayList();
    ApiAdapter api = getApiAdapter();
    // Check the L1 cache
    for (int i = 0; i < ids.length; i++) {
        Object pc = getObjectFromLevel1Cache(ids[i]);
        if (pc != null) {
            if (ids[i] instanceof SCOID) {
                if (api.isPersistent(pc) && !api.isNew(pc) && !api.isDeleted(pc) && !api.isTransactional(pc)) {
                    // JDO [5.4.4] Can't return HOLLOW nondurable objects
                    throw new NucleusUserException(Localiser.msg("010005"));
                }
            }
            pcById.put(ids[i], pc);
        } else {
            idsToFind.add(ids[i]);
        }
    }
    if (!idsToFind.isEmpty() && l2CacheEnabled) {
        // Check the L2 cache for those not found
        Map pcsById = getObjectsFromLevel2Cache(idsToFind);
        if (!pcsById.isEmpty()) {
            // Found some so add to the values, and remove from the "toFind" list
            Iterator<Map.Entry> entryIter = pcsById.entrySet().iterator();
            while (entryIter.hasNext()) {
                Map.Entry entry = entryIter.next();
                pcById.put(entry.getKey(), entry.getValue());
                idsToFind.remove(entry.getKey());
            }
        }
    }
    boolean performValidationWhenCached = nucCtx.getConfiguration().getBooleanProperty(PropertyNames.PROPERTY_FIND_OBJECT_VALIDATE_WHEN_CACHED);
    List<ObjectProvider> opsToValidate = new ArrayList<>();
    if (validate) {
        if (performValidationWhenCached) {
            // Mark all ObjectProviders for validation (performed at end)
            Collection pcValues = pcById.values();
            for (Object pc : pcValues) {
                if (api.isTransactional(pc)) {
                    // This object is transactional, so no need to validate
                    continue;
                }
                // Mark this object for validation
                ObjectProvider op = findObjectProvider(pc);
                opsToValidate.add(op);
            }
        }
    }
    Object[] foundPcs = null;
    if (!idsToFind.isEmpty()) {
        // Try to find unresolved objects direct from the datastore if supported by the datastore (e.g ODBMS)
        foundPcs = getStoreManager().getPersistenceHandler().findObjects(this, idsToFind.toArray());
    }
    int foundPcIdx = 0;
    for (Object id : idsToFind) {
        // Id target class could change due to inheritance level
        Object idOrig = id;
        Object pc = foundPcs != null ? foundPcs[foundPcIdx++] : null;
        ObjectProvider op = null;
        if (pc != null) {
            // Object created by store plugin
            op = findObjectProvider(pc);
            putObjectIntoLevel1Cache(op);
        } else {
            // Object not found yet, so maybe class name is not correct inheritance level
            ClassDetailsForId details = getClassDetailsForId(id, null, validate);
            String className = details.className;
            id = details.id;
            if (details.pc != null) {
                // Found in cache from updated id
                pc = details.pc;
                op = findObjectProvider(pc);
                if (performValidationWhenCached && validate) {
                    if (!api.isTransactional(pc)) {
                        // Mark this object for validation
                        opsToValidate.add(op);
                    }
                }
            } else {
                // Still not found so create a Hollow instance with the supplied field values
                try {
                    Class pcClass = clr.classForName(className, (id instanceof DatastoreId) ? null : id.getClass().getClassLoader());
                    if (Modifier.isAbstract(pcClass.getModifiers())) {
                        // This class is abstract so impossible to have an instance of this type
                        throw new NucleusObjectNotFoundException(Localiser.msg("010027", IdentityUtils.getPersistableIdentityForId(id), className));
                    }
                    op = nucCtx.getObjectProviderFactory().newForHollow(this, pcClass, id);
                    pc = op.getObject();
                    if (!validate) {
                        // Mark the ObjectProvider as needing to validate this object before loading fields
                        op.markForInheritanceValidation();
                    }
                    // Cache it in case we have bidir relations
                    putObjectIntoLevel1Cache(op);
                } catch (ClassNotResolvedException e) {
                    NucleusLogger.PERSISTENCE.warn(Localiser.msg("010027", IdentityUtils.getPersistableIdentityForId(id)));
                    throw new NucleusUserException(Localiser.msg("010027", IdentityUtils.getPersistableIdentityForId(id)), e);
                }
                if (validate) {
                    // Mark this object for validation
                    opsToValidate.add(op);
                }
            }
        }
        // Put in map under input id, so we find it later
        pcById.put(idOrig, pc);
    }
    if (!opsToValidate.isEmpty()) {
        // Validate the objects that need it
        try {
            getStoreManager().getPersistenceHandler().locateObjects(opsToValidate.toArray(new ObjectProvider[opsToValidate.size()]));
        } catch (NucleusObjectNotFoundException nonfe) {
            NucleusObjectNotFoundException[] nonfes = (NucleusObjectNotFoundException[]) nonfe.getNestedExceptions();
            if (nonfes != null) {
                for (int i = 0; i < nonfes.length; i++) {
                    Object missingId = nonfes[i].getFailedObject();
                    removeObjectFromLevel1Cache(missingId);
                }
            }
            throw nonfe;
        }
    }
    Object[] objs = new Object[ids.length];
    for (int i = 0; i < ids.length; i++) {
        Object id = ids[i];
        objs[i] = pcById.get(id);
    }
    return objs;
}