Examples with OCommandRequestAsynch com.orientechnologies.orient.core.command.OCommandRequestAsynch used on opensource projects

Example 1 with OCommandRequestAsynch

use of com.orientechnologies.orient.core.command.OCommandRequestAsynch in project orientdb by orientechnologies.

the class OStorageRemote method command.

/**
 * Execute the command remotely and get the results back.
 */
public Object command(final OCommandRequestText iCommand) {
    if (!(iCommand instanceof OSerializableStream))
        throw new OCommandExecutionException("Cannot serialize the command to be executed to the server side.");
    final boolean live = iCommand instanceof OLiveQuery;
    final ODatabaseDocument database = ODatabaseRecordThreadLocal.INSTANCE.get();
    return networkOperation(new OStorageRemoteOperation<Object>() {

        @Override
        public Object execute(final OChannelBinaryAsynchClient network, OStorageRemoteSession session) throws IOException {
            Object result = null;
            session.commandExecuting = true;
            try {
                final boolean asynch = iCommand instanceof OCommandRequestAsynch && ((OCommandRequestAsynch) iCommand).isAsynchronous();
                try {
                    beginRequest(network, OChannelBinaryProtocol.REQUEST_COMMAND, session);
                    if (live) {
                        network.writeByte((byte) 'l');
                    } else {
                        // ASYNC / SYNC
                        network.writeByte((byte) (asynch ? 'a' : 's'));
                    }
                    network.writeBytes(OStreamSerializerAnyStreamable.INSTANCE.toStream(iCommand));
                } finally {
                    endRequest(network);
                }
                try {
                    beginResponse(network, session);
                    // Collection of prefetched temporary record (nested projection record), to refer for avoid garbage collection.
                    List<ORecord> temporaryResults = new ArrayList<ORecord>();
                    boolean addNextRecord = true;
                    if (asynch) {
                        byte status;
                        // ASYNCH: READ ONE RECORD AT TIME
                        while ((status = network.readByte()) > 0) {
                            final ORecord record = (ORecord) OChannelBinaryProtocol.readIdentifiable(network);
                            if (record == null)
                                continue;
                            switch(status) {
                                case 1:
                                    // PUT AS PART OF THE RESULT SET. INVOKE THE LISTENER
                                    if (addNextRecord) {
                                        addNextRecord = iCommand.getResultListener().result(record);
                                        database.getLocalCache().updateRecord(record);
                                    }
                                    break;
                                case 2:
                                    if (record.getIdentity().getClusterId() == -2)
                                        temporaryResults.add(record);
                                    // PUT IN THE CLIENT LOCAL CACHE
                                    database.getLocalCache().updateRecord(record);
                            }
                        }
                    } else {
                        result = readSynchResult(network, database, temporaryResults);
                        if (live) {
                            final ODocument doc = ((List<ODocument>) result).get(0);
                            final Integer token = doc.field("token");
                            final Boolean unsubscribe = doc.field("unsubscribe");
                            if (token != null) {
                                if (Boolean.TRUE.equals(unsubscribe)) {
                                    if (OStorageRemote.this.asynchEventListener != null)
                                        OStorageRemote.this.asynchEventListener.unregisterLiveListener(token);
                                } else {
                                    final OLiveResultListener listener = (OLiveResultListener) iCommand.getResultListener();
                                    ODatabaseDocumentInternal current = ODatabaseRecordThreadLocal.INSTANCE.get();
                                    final ODatabaseDocument dbCopy = current.copy();
                                    ORemoteConnectionPool pool = OStorageRemote.this.connectionManager.getPool(network.getServerURL());
                                    OStorageRemote.this.asynchEventListener.registerLiveListener(pool, token, new OLiveResultListener() {

                                        @Override
                                        public void onUnsubscribe(int iLiveToken) {
                                            listener.onUnsubscribe(iLiveToken);
                                            dbCopy.close();
                                        }

                                        @Override
                                        public void onLiveResult(int iLiveToken, ORecordOperation iOp) throws OException {
                                            dbCopy.activateOnCurrentThread();
                                            listener.onLiveResult(iLiveToken, iOp);
                                        }

                                        @Override
                                        public void onError(int iLiveToken) {
                                            listener.onError(iLiveToken);
                                            dbCopy.close();
                                        }
                                    });
                                }
                            } else {
                                throw new OStorageException("Cannot execute live query, returned null token");
                            }
                        }
                    }
                    if (!temporaryResults.isEmpty()) {
                        if (result instanceof OBasicResultSet<?>) {
                            ((OBasicResultSet<?>) result).setTemporaryRecordCache(temporaryResults);
                        }
                    }
                    return result;
                } finally {
                    endResponse(network);
                }
            } finally {
                session.commandExecuting = false;
                if (iCommand.getResultListener() != null && !live)
                    iCommand.getResultListener().end();
            }
        }
    }, "Error on executing command: " + iCommand);
}