| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.asterix.transaction.management.opcallbacks; |
| |
| import org.apache.asterix.common.exceptions.ACIDException; |
| import org.apache.asterix.common.transactions.AbstractOperationCallback; |
| import org.apache.asterix.common.transactions.DatasetId; |
| import org.apache.asterix.common.transactions.ILockManager; |
| import org.apache.asterix.common.transactions.ITransactionContext; |
| import org.apache.asterix.transaction.management.service.transaction.TransactionManagementConstants.LockManagerConstants.LockMode; |
| import org.apache.hyracks.api.exceptions.HyracksDataException; |
| import org.apache.hyracks.dataflow.common.data.accessors.ITupleReference; |
| import org.apache.hyracks.storage.common.ISearchOperationCallback; |
| |
| /** |
| * Assumes LSM-BTrees as primary indexes. Implements try/locking and unlocking on primary keys. |
| */ |
| public class PrimaryIndexSearchOperationCallback extends AbstractOperationCallback implements ISearchOperationCallback { |
| |
| public PrimaryIndexSearchOperationCallback(DatasetId datasetId, long resourceId, int[] entityIdFields, |
| ILockManager lockManager, ITransactionContext txnCtx) { |
| super(datasetId, resourceId, entityIdFields, txnCtx, lockManager); |
| } |
| |
| @Override |
| public void before(ITupleReference tuple) throws HyracksDataException { |
| //no op |
| } |
| |
| @Override |
| public boolean proceed(ITupleReference tuple) throws HyracksDataException { |
| try { |
| return lockManager.tryLock(datasetId, -1, LockMode.S, txnCtx); |
| } catch (ACIDException e) { |
| throw HyracksDataException.create(e); |
| } |
| } |
| |
| @Override |
| public void reconcile(ITupleReference tuple) throws HyracksDataException { |
| try { |
| lockManager.lock(datasetId, -1, LockMode.S, txnCtx); |
| } catch (ACIDException e) { |
| throw HyracksDataException.create(e); |
| } |
| } |
| |
| @Override |
| public void cancel(ITupleReference tuple) throws HyracksDataException { |
| //no op |
| } |
| |
| @Override |
| public void complete(ITupleReference tuple) throws HyracksDataException { |
| //no op |
| } |
| } |