Exemplo n.º 1
0
    final long fetchRecord(Version shared) {
        if (Debug.ENABLED)
            Debug.assertion(!_updatedVersions.contains(shared));

        long record = Record.NOT_STORED;
        Object union = shared.getUnion();

        if (union instanceof Descriptor) {
            Descriptor descriptor = (Descriptor) union;
            Session session = descriptor.getSession();
            long records = session.getRecords();

            if (records == Record.NOT_STORED) {
                records = _sessions.fetch(session.getSharedVersion_objectfabric().getUID());
                session.setRecords(records);
            }

            record = fetchRecord(records, descriptor.getId() & 0xff);
        } else {
            byte[] uid = shared.getUID();

            if (uid != null) {
                long records = _sessions.fetch(uid);
                record = fetchRecord(records, Session.UID_OBJECT_ID & 0xff);
            }
        }

        if (Debug.ENABLED)
            Debug.assertion(record != Record.UNKNOWN);

        return record;
    }
Exemplo n.º 2
0
    @Override
    protected Action onVisitingTObject(Visitor visitor, TObject object) {
        Action action = super.onVisitingTObject(visitor, object);

        if (action == Action.VISIT) {
            /*
             * TODO write version to a cache, for now writer will snapshot entire object
             * for each change.
             */

            // Object union = ((Version) object).getUnion();
            //
            // if (!(union instanceof Record))
            // return Action.SKIP;
            //
            // if (((Record) union).getRecord() == Record.NULL)
            // return Action.SKIP;

            Version shared = (Version) object;
            long record = getOrFetchRecord(shared);
            int id = shared.getClassId();

            if (record != Record.NOT_STORED) {
                // TODO: temporary: other objects should not be snapshotted
                if (id == DefaultObjectModel.COM_OBJECTFABRIC_TMAP_CLASS_ID || id == DefaultObjectModel.COM_OBJECTFABRIC_TSET_CLASS_ID)
                    return Action.VISIT;

                _writer.snapshot(shared);
            } else {
                /*
                 * Lazy objects must always be stored, otherwise during construction their
                 * content can get GCed before the lazy object is added to the store.
                 */
                if (id == DefaultObjectModelBase.COM_OBJECTFABRIC_LAZYMAP_CLASS_ID)
                    return Action.VISIT;
            }
        }

        return Action.SKIP;
    }
Exemplo n.º 3
0
    final long getRecord(Version shared) {
        int index = _updatedVersions.indexOf(shared);

        if (index >= 0)
            return _updatedVersionsRecords[index];

        Object union = shared.getUnion();

        if (union instanceof Record)
            return ((Record) union).getRecord();

        return Record.NOT_STORED;
    }
Exemplo n.º 4
0
        @Override
        protected void checkedRun() {
            if (Debug.THREADS) {
                ThreadAssert.resume(this, false);
                ThreadAssert.exchangeTake(this);
            }

            Exception ex;

            try {
                onRunStarting();
                runTasks();

                //

                while (_inserts.size() > 0)
                    _refs.add(writeObject(_inserts.poll()));

                //

                if (Debug.ENABLED)
                    Debug.assertion(!_writer.interrupted());

                for (;;) {
                    BinaryStore.this.run(_writer);

                    if (!_writer.interrupted())
                        break;

                    _writer.grow();
                }

                _writer.writeSnapshots();

                //

                Exception wrongStore = null;
                int toremove;

                if (_writer.getWrongStore() == null)
                    _jdbm.commit();
                else {
                    _jdbm.rollback();
                    wrongStore = new RuntimeException(Strings.WRONG_STORE + _writer.getWrongStore());
                }

                while (_processed.size() > 0) {
                    Transaction branch = _processed.pollPartOfClear();
                    byte interception = _processedInterceptions[_processed.size()];

                    if (wrongStore == null)
                        Interceptor.ack(branch, interception, true);
                    else
                        Interceptor.nack(branch, null, wrongStore);
                }

                if (wrongStore != null) {
                    if (Debug.ENABLED) {
                        // Assert old records have been restored on rollback
                        for (int i = 0; i < _updatedVersions.size(); i++) {
                            Version shared = _updatedVersions.get(i);
                            Debug.assertion(_jdbm.fetch(shared.getRecord()) != null);
                        }
                    }

                    _updatedVersions.clear();
                    _updatedSessions.clear();
                } else {
                    while (_updatedVersions.size() > 0) {
                        Version shared = _updatedVersions.pollPartOfClear();
                        long record = _updatedVersionsRecords[_updatedVersions.size()];
                        shared.setRecord(record);
                    }

                    while (_updatedSessions.size() > 0) {
                        Session session = _updatedSessions.pollPartOfClear();
                        long records = _updatedSessionsRecords[_updatedSessions.size()];
                        session.setRecords(records);
                    }
                }

                //

                while (_callbacks.size() > 0) {
                    AsyncCallback<byte[]> callback = _callbacks.poll();
                    byte[] ref = _refs.poll();

                    if (wrongStore == null)
                        callback.onSuccess(ref);
                    else
                        callback.onFailure(wrongStore);
                }

                //

                _writer.resetWrongStore();

                if (Debug.THREADS)
                    ThreadAssert.suspend(this);

                setFlushes();
                onRunEnded();
                return;
            } catch (Exception e) {
                ex = e;
            }

            while (_callbacks.size() > 0)
                _callbacks.poll().onFailure(ex);

            // Only in case of exception (can be closing)
            onException(ex);
        }