| /* |
| * Copyright 2009-2010 by The Regents of the University of California |
| * Licensed 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 from |
| * |
| * 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 edu.uci.ics.hyracks.storage.am.common.dataflow; |
| |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| import edu.uci.ics.hyracks.api.comm.IFrameWriter; |
| import edu.uci.ics.hyracks.api.context.IHyracksTaskContext; |
| import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor; |
| import edu.uci.ics.hyracks.api.exceptions.HyracksDataException; |
| import edu.uci.ics.hyracks.api.io.FileReference; |
| import edu.uci.ics.hyracks.dataflow.std.base.AbstractOperatorNodePushable; |
| import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider; |
| import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex; |
| import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface; |
| import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache; |
| import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider; |
| |
| public class TreeIndexDropOperatorNodePushable extends |
| AbstractOperatorNodePushable { |
| private static final Logger LOGGER = Logger |
| .getLogger(TreeIndexDropOperatorNodePushable.class.getName()); |
| |
| private final IHyracksTaskContext ctx; |
| private IIndexRegistryProvider<ITreeIndex> treeIndexRegistryProvider; |
| private IStorageManagerInterface storageManager; |
| private IFileSplitProvider fileSplitProvider; |
| private int partition; |
| |
| public TreeIndexDropOperatorNodePushable(IHyracksTaskContext ctx, |
| IStorageManagerInterface storageManager, |
| IIndexRegistryProvider<ITreeIndex> treeIndexRegistryProvider, |
| IFileSplitProvider fileSplitProvider, int partition) { |
| this.ctx = ctx; |
| this.storageManager = storageManager; |
| this.treeIndexRegistryProvider = treeIndexRegistryProvider; |
| this.fileSplitProvider = fileSplitProvider; |
| this.partition = partition; |
| } |
| |
| @Override |
| public void deinitialize() throws HyracksDataException { |
| } |
| |
| @Override |
| public int getInputArity() { |
| return 0; |
| } |
| |
| @Override |
| public IFrameWriter getInputFrameWriter(int index) { |
| return null; |
| } |
| |
| @Override |
| public void initialize() throws HyracksDataException { |
| try { |
| |
| IndexRegistry<ITreeIndex> treeIndexRegistry = treeIndexRegistryProvider |
| .getRegistry(ctx); |
| IBufferCache bufferCache = storageManager.getBufferCache(ctx); |
| IFileMapProvider fileMapProvider = storageManager |
| .getFileMapProvider(ctx); |
| |
| FileReference f = fileSplitProvider.getFileSplits()[partition] |
| .getLocalFile(); |
| |
| boolean fileIsMapped = fileMapProvider.isMapped(f); |
| if (!fileIsMapped) { |
| throw new HyracksDataException("Cannot drop Tree with name " |
| + f.toString() + ". No file mapping exists."); |
| } |
| |
| int indexFileId = fileMapProvider.lookupFileId(f); |
| |
| // unregister tree instance |
| treeIndexRegistry.lock(); |
| try { |
| treeIndexRegistry.unregister(indexFileId); |
| } finally { |
| treeIndexRegistry.unlock(); |
| } |
| |
| // remove name to id mapping |
| bufferCache.deleteFile(indexFileId); |
| } |
| // TODO: for the time being we don't throw, |
| // with proper exception handling (no hanging job problem) we should |
| // throw |
| catch (Exception e) { |
| if (LOGGER.isLoggable(Level.WARNING)) { |
| LOGGER.warning("Tree Drop Operator Failed Due To Exception: " |
| + e.getMessage()); |
| } |
| } |
| } |
| |
| @Override |
| public void setOutputFrameWriter(int index, IFrameWriter writer, |
| RecordDescriptor recordDesc) { |
| } |
| } |