Examples with FieldManager org.datanucleus.store.fieldmanager.FieldManager used on opensource projects

Example 16 with FieldManager

use of org.datanucleus.store.fieldmanager.FieldManager in project datanucleus-core by datanucleus.

the class StateManagerImpl method detach.

/**
 * Method to detach this object.
 * If the object is detachable then it will be migrated to DETACHED state, otherwise will migrate to TRANSIENT. Used by "DetachAllOnCommit"/"DetachAllOnRollback"
 * @param state State for the detachment process
 */
public void detach(FetchPlanState state) {
    if (myEC == null) {
        return;
    }
    ApiAdapter api = myEC.getApiAdapter();
    if (myLC.isDeleted() || api.isDetached(myPC) || isDetaching()) {
        // Already deleted, detached or being detached
        return;
    }
    // Check if detachable ... if so then we detach a copy, otherwise we return a transient copy
    boolean detachable = api.isDetachable(myPC);
    if (detachable) {
        if (NucleusLogger.PERSISTENCE.isDebugEnabled()) {
            NucleusLogger.PERSISTENCE.debug(Localiser.msg("010009", StringUtils.toJVMIDString(myPC), "" + state.getCurrentFetchDepth()));
        }
        // Call any "pre-detach" listeners
        getCallbackHandler().preDetach(myPC);
    }
    try {
        setDetaching(true);
        String detachedState = myEC.getNucleusContext().getConfiguration().getStringProperty(PropertyNames.PROPERTY_DETACH_DETACHED_STATE);
        if (detachedState.equalsIgnoreCase("all")) {
            loadUnloadedFields();
        } else if (detachedState.equalsIgnoreCase("loaded")) {
        // Do nothing since just using currently loaded fields
        } else {
            // Using fetch-groups, so honour detachmentOptions for loading/unloading
            if ((myEC.getFetchPlan().getDetachmentOptions() & FetchPlan.DETACH_LOAD_FIELDS) != 0) {
                // Load any unloaded fetch-plan fields
                loadUnloadedFieldsInFetchPlan();
            }
            if ((myEC.getFetchPlan().getDetachmentOptions() & FetchPlan.DETACH_UNLOAD_FIELDS) != 0) {
                // Unload any loaded fetch-plan fields that aren't in the current fetch plan
                unloadNonFetchPlanFields();
                // Remove the values from the detached object - not required by the spec
                int[] unloadedFields = ClassUtils.getFlagsSetTo(loadedFields, cmd.getAllMemberPositions(), false);
                if (unloadedFields != null && unloadedFields.length > 0) {
                    Persistable dummyPC = myPC.dnNewInstance(this);
                    myPC.dnCopyFields(dummyPC, unloadedFields);
                    replaceStateManager(dummyPC, null);
                }
            }
        }
        // Detach all (loaded) fields in the FetchPlan
        FieldManager detachFieldManager = new DetachFieldManager(this, cmd.getSCOMutableMemberFlags(), myFP, state, false);
        for (int i = 0; i < loadedFields.length; i++) {
            if (loadedFields[i]) {
                try {
                    // Just fetch the field since we are usually called in postCommit() so dont want to update it
                    detachFieldManager.fetchObjectField(i);
                } catch (EndOfFetchPlanGraphException eofpge) {
                    Object value = provideField(i);
                    if (api.isPersistable(value)) {
                        // PC field beyond end of graph
                        ObjectProvider valueOP = myEC.findObjectProvider(value);
                        if (!api.isDetached(value) && !(valueOP != null && valueOP.isDetaching())) {
                            // Field value is not detached or being detached so unload it
                            String fieldName = cmd.getMetaDataForManagedMemberAtAbsolutePosition(i).getName();
                            if (NucleusLogger.PERSISTENCE.isDebugEnabled()) {
                                NucleusLogger.PERSISTENCE.debug(Localiser.msg("026032", StringUtils.toJVMIDString(myPC), IdentityUtils.getPersistableIdentityForId(myID), fieldName));
                            }
                            unloadField(fieldName);
                        }
                    }
                // TODO What if we have collection/map that includes some objects that are not detached?
                // Currently we just leave as persistent etc but should we????
                // The problem is that with 1-N bidir fields we could unload the field incorrectly
                }
            }
        }
        if (detachable) {
            // Migrate the lifecycle state to DETACHED_CLEAN
            myLC = myLC.transitionDetach(this);
            // Update the object with its detached state
            myPC.dnReplaceFlags();
            ((Detachable) myPC).dnReplaceDetachedState();
            // Call any "post-detach" listeners
            // there is no copy, so give the same object
            getCallbackHandler().postDetach(myPC, myPC);
            Persistable toCheckPC = myPC;
            Object toCheckID = myID;
            disconnect();
            if (!toCheckPC.dnIsDetached()) {
                // Sanity check on the objects detached state
                throw new NucleusUserException(Localiser.msg("026025", toCheckPC.getClass().getName(), toCheckID));
            }
        } else {
            // Warn the user since they selected detachAllOnCommit
            NucleusLogger.PERSISTENCE.warn(Localiser.msg("026031", myPC.getClass().getName(), IdentityUtils.getPersistableIdentityForId(myID)));
            // Make the object transient
            makeTransient(null);
        }
    } finally {
        setDetaching(false);
    }
}

Example 17 with FieldManager

use of org.datanucleus.store.fieldmanager.FieldManager in project datanucleus-core by datanucleus.

the class StateManagerImpl method initialiseForPersistentNew.

/**
 * Initialises a state manager to manage a transient instance that is becoming newly persistent.
 * A new object ID for the instance is obtained from the store manager and the object is inserted in the data store.
 * <p>
 * This constructor is used for assigning state managers to existing instances that are transitioning to a persistent state.
 * @param pc the instance being make persistent.
 * @param preInsertChanges Any changes to make before inserting
 */
public void initialiseForPersistentNew(Persistable pc, FieldValues preInsertChanges) {
    myPC = pc;
    myLC = myEC.getNucleusContext().getApiAdapter().getLifeCycleState(LifeCycleState.P_NEW);
    persistenceFlags = Persistable.READ_OK;
    for (int i = 0; i < loadedFields.length; ++i) {
        loadedFields[i] = true;
    }
    // Assign this StateManager to the PC
    replaceStateManager(myPC, this);
    myPC.dnReplaceFlags();
    saveFields();
    // Populate all fields that have "value-strategy" and are not datastore populated
    populateValueGenerationFields();
    if (preInsertChanges != null) {
        // Apply any pre-insert field updates
        preInsertChanges.fetchFields(this);
    }
    if (cmd.getIdentityType() == IdentityType.APPLICATION) {
        // Make sure any PK fields that are Persistable are persisted first, so we have an id to assign our identity
        int[] pkFieldNumbers = cmd.getPKMemberPositions();
        for (int i = 0; i < pkFieldNumbers.length; i++) {
            int fieldNumber = pkFieldNumbers[i];
            AbstractMemberMetaData fmd = cmd.getMetaDataForManagedMemberAtAbsolutePosition(fieldNumber);
            if (myEC.getMetaDataManager().getMetaDataForClass(fmd.getType(), getExecutionContext().getClassLoaderResolver()) != null) {
                try {
                    if (myEC.getMultithreaded()) {
                        myEC.getLock().lock();
                        lock.lock();
                    }
                    FieldManager prevFM = currFM;
                    try {
                        currFM = new SingleValueFieldManager();
                        myPC.dnProvideField(fieldNumber);
                        Persistable pkFieldPC = (Persistable) ((SingleValueFieldManager) currFM).fetchObjectField(fieldNumber);
                        if (pkFieldPC == null) {
                            throw new NucleusUserException(Localiser.msg("026016", fmd.getFullFieldName()));
                        }
                        if (!myEC.getApiAdapter().isPersistent(pkFieldPC)) {
                            // Make sure the PC field is persistent - can cause the insert of our object being managed by this SM via flush() when bidir relation
                            Object persistedFieldPC = myEC.persistObjectInternal(pkFieldPC, null, null, -1, ObjectProvider.PC);
                            replaceField(myPC, fieldNumber, persistedFieldPC, false);
                        }
                    } finally {
                        currFM = prevFM;
                    }
                } finally {
                    if (myEC.getMultithreaded()) {
                        lock.unlock();
                        myEC.getLock().unlock();
                    }
                }
            }
        }
    }
    // Set the identity of this object
    setIdentity(false);
    if (myEC.getTransaction().isActive()) {
        myEC.enlistInTransaction(this);
    }
    // Now in PERSISTENT_NEW so call any callbacks/listeners
    getCallbackHandler().postCreate(myPC);
    if (myEC.getManageRelations()) {
        // Managed Relations : register non-null bidir fields for later processing
        ClassLoaderResolver clr = myEC.getClassLoaderResolver();
        int[] relationPositions = cmd.getRelationMemberPositions(clr);
        if (relationPositions != null) {
            for (int i = 0; i < relationPositions.length; i++) {
                AbstractMemberMetaData mmd = cmd.getMetaDataForManagedMemberAtAbsolutePosition(relationPositions[i]);
                if (RelationType.isBidirectional(mmd.getRelationType(clr))) {
                    Object value = provideField(relationPositions[i]);
                    if (value != null) {
                        // Store the field with value of null so it gets checked
                        myEC.getRelationshipManager(this).relationChange(relationPositions[i], null, value);
                    }
                }
            }
        }
    }
}

Example 18 with FieldManager

use of org.datanucleus.store.fieldmanager.FieldManager in project datanucleus-core by datanucleus.

the class StateManagerImpl method replaceNonLoadedFields.

/**
 * Called from the StoreManager to refresh data in the Persistable object associated with this StateManager.
 * Only fields that are not currently loaded are refreshed
 * @param fieldNumbers An array of field numbers to be refreshed by the Store
 * @param fm The updated values are stored in this object. This object is only valid for the duration of this call.
 */
public void replaceNonLoadedFields(int[] fieldNumbers, FieldManager fm) {
    try {
        if (myEC.getMultithreaded()) {
            myEC.getLock().lock();
            lock.lock();
        }
        FieldManager prevFM = currFM;
        currFM = fm;
        boolean callPostLoad = myFP.isToCallPostLoadFetchPlan(this.loadedFields);
        try {
            int[] fieldsToReplace = ClassUtils.getFlagsSetTo(loadedFields, fieldNumbers, false);
            if (fieldsToReplace != null && fieldsToReplace.length > 0) {
                myPC.dnReplaceFields(fieldsToReplace);
            }
        } finally {
            currFM = prevFM;
        }
        if (callPostLoad && areFieldsLoaded(myFP.getMemberNumbers())) {
            // The fetch plan is now loaded so fire off any necessary post load
            postLoad();
        }
    } finally {
        if (myEC.getMultithreaded()) {
            lock.unlock();
            myEC.getLock().unlock();
        }
    }
}