| /* |
| * 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.hyracks.storage.am.common.dataflow; |
| |
| import org.apache.hyracks.api.application.INCServiceContext; |
| import org.apache.hyracks.api.exceptions.ErrorCode; |
| import org.apache.hyracks.api.exceptions.HyracksDataException; |
| import org.apache.hyracks.api.io.FileReference; |
| import org.apache.hyracks.storage.am.common.api.IIndexDataflowHelper; |
| import org.apache.hyracks.storage.common.IIndex; |
| import org.apache.hyracks.storage.common.ILocalResourceRepository; |
| import org.apache.hyracks.storage.common.IResource; |
| import org.apache.hyracks.storage.common.IResourceLifecycleManager; |
| import org.apache.hyracks.storage.common.IStorageManager; |
| import org.apache.hyracks.storage.common.LocalResource; |
| import org.apache.logging.log4j.Level; |
| import org.apache.logging.log4j.LogManager; |
| import org.apache.logging.log4j.Logger; |
| |
| public class IndexDataflowHelper implements IIndexDataflowHelper { |
| |
| private static final Logger LOGGER = LogManager.getLogger(); |
| private final INCServiceContext ctx; |
| private final IResourceLifecycleManager<IIndex> lcManager; |
| private final ILocalResourceRepository localResourceRepository; |
| private final FileReference resourceRef; |
| private IIndex index; |
| |
| public IndexDataflowHelper(final INCServiceContext ctx, IStorageManager storageMgr, FileReference resourceRef) |
| throws HyracksDataException { |
| this.ctx = ctx; |
| this.lcManager = storageMgr.getLifecycleManager(ctx); |
| this.localResourceRepository = storageMgr.getLocalResourceRepository(ctx); |
| this.resourceRef = resourceRef; |
| } |
| |
| @Override |
| public IIndex getIndexInstance() { |
| return index; |
| } |
| |
| @Override |
| public void open() throws HyracksDataException { |
| //Get local resource file |
| synchronized (lcManager) { |
| index = lcManager.get(resourceRef.getRelativePath()); |
| if (index == null) { |
| LocalResource lr = readIndex(); |
| lcManager.register(lr.getPath(), index); |
| } |
| lcManager.open(resourceRef.getRelativePath()); |
| } |
| } |
| |
| private LocalResource readIndex() throws HyracksDataException { |
| // Get local resource |
| LocalResource lr = getResource(); |
| if (lr == null) { |
| LOGGER.error("index {} does not exist", resourceRef.getRelativePath()); |
| throw HyracksDataException.create(ErrorCode.INDEX_DOES_NOT_EXIST); |
| } |
| IResource resource = lr.getResource(); |
| index = resource.createInstance(ctx); |
| return lr; |
| } |
| |
| @Override |
| public void close() throws HyracksDataException { |
| synchronized (lcManager) { |
| lcManager.close(resourceRef.getRelativePath()); |
| } |
| } |
| |
| @Override |
| public void destroy() throws HyracksDataException { |
| LOGGER.log(Level.INFO, "Dropping index " + resourceRef.getRelativePath() + " on node " + ctx.getNodeId()); |
| synchronized (lcManager) { |
| index = lcManager.get(resourceRef.getRelativePath()); |
| if (index != null) { |
| lcManager.unregister(resourceRef.getRelativePath()); |
| } else { |
| readIndex(); |
| } |
| |
| if (getResourceId() != -1) { |
| localResourceRepository.delete(resourceRef.getRelativePath()); |
| } |
| index.destroy(); |
| } |
| } |
| |
| private long getResourceId() throws HyracksDataException { |
| LocalResource lr = localResourceRepository.get(resourceRef.getRelativePath()); |
| return lr == null ? -1 : lr.getId(); |
| } |
| |
| @Override |
| public LocalResource getResource() throws HyracksDataException { |
| return localResourceRepository.get(resourceRef.getRelativePath()); |
| } |
| } |