| /* |
| * 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.dataflow.std.join; |
| |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| import org.apache.hyracks.api.comm.IFrame; |
| import org.apache.hyracks.api.comm.IFrameTupleAppender; |
| import org.apache.hyracks.api.comm.VSizeFrame; |
| import org.apache.hyracks.api.context.IHyracksTaskContext; |
| import org.apache.hyracks.api.exceptions.HyracksDataException; |
| import org.apache.hyracks.api.io.FileReference; |
| import org.apache.hyracks.dataflow.common.comm.io.FrameTupleAppender; |
| import org.apache.hyracks.dataflow.common.io.RunFileReader; |
| import org.apache.hyracks.dataflow.common.io.RunFileWriter; |
| import org.apache.hyracks.dataflow.std.buffermanager.ITupleAccessor; |
| import org.apache.hyracks.dataflow.std.structures.RunFilePointer; |
| |
| public class RunFileStream { |
| |
| private static final Logger LOGGER = Logger.getLogger(RunFileStream.class.getName()); |
| |
| private final String key; |
| private final IFrame runFileBuffer; |
| private final IFrameTupleAppender runFileAppender; |
| private RunFileWriter runFileWriter; |
| private RunFileReader runFileReader; |
| private final IRunFileStreamStatus status; |
| |
| private final IHyracksTaskContext ctx; |
| |
| private long runFileCounter = 0; |
| private long readCount = 0; |
| private long writeCount = 0; |
| private long tupleCount = 0; |
| |
| /** |
| * The RunFileSream uses two frames to buffer read and write operations. |
| * |
| * @param ctx |
| * @param key |
| * @param status |
| * @throws HyracksDataException |
| */ |
| public RunFileStream(IHyracksTaskContext ctx, String key, IRunFileStreamStatus status) throws HyracksDataException { |
| this.ctx = ctx; |
| this.key = key; |
| this.status = status; |
| |
| runFileBuffer = new VSizeFrame(ctx); |
| runFileAppender = new FrameTupleAppender(new VSizeFrame(ctx)); |
| } |
| |
| public long getFileCount() { |
| return runFileCounter; |
| } |
| |
| public long getReadCount() { |
| return readCount; |
| } |
| |
| public long getWriteCount() { |
| return writeCount; |
| } |
| |
| public void startRunFileWriting() throws HyracksDataException { |
| runFileCounter++; |
| |
| status.setRunFileWriting(true); |
| String prefix = this.getClass().getSimpleName() + '-' + key + '-' + Long.toString(runFileCounter) + '-' |
| + this.toString(); |
| FileReference file = ctx.getJobletContext().createManagedWorkspaceFile(prefix); |
| runFileWriter = new RunFileWriter(file, ctx.getIOManager()); |
| runFileWriter.open(); |
| if (LOGGER.isLoggable(Level.FINE)) { |
| LOGGER.fine("A new run file has been started (key: " + key + ", number: " + runFileCounter + ", file: " |
| + file + ")."); |
| } |
| } |
| |
| public void resumeRunFileWriting() throws HyracksDataException { |
| status.setRunFileWriting(true); |
| String prefix = this.getClass().getSimpleName() + '-' + key + '-' + Long.toString(runFileCounter) + '-' |
| + this.toString(); |
| FileReference file = ctx.getJobletContext().createManagedWorkspaceFile(prefix); |
| runFileWriter = new RunFileWriter(file, ctx.getIOManager()); |
| runFileWriter.open(); |
| if (LOGGER.isLoggable(Level.FINE)) { |
| LOGGER.fine("A new run file has been started (key: " + key + ", number: " + runFileCounter + ", file: " |
| + file + ")."); |
| } |
| } |
| |
| public void addToRunFile(ITupleAccessor accessor) throws HyracksDataException { |
| int idx = accessor.getTupleId(); |
| if (!runFileAppender.append(accessor, idx)) { |
| runFileAppender.write(runFileWriter, true); |
| writeCount++; |
| runFileAppender.append(accessor, idx); |
| tupleCount = 0; |
| } |
| tupleCount++; |
| } |
| |
| public void startReadingRunFile(ITupleAccessor accessor) throws HyracksDataException { |
| status.setRunFileReading(true); |
| |
| // Create reader |
| runFileReader = runFileWriter.createReader(); |
| runFileReader.open(); |
| |
| // Load first frame |
| loadNextBuffer(accessor); |
| } |
| |
| // public void resetReader(ITupleAccessor accessor) throws HyracksDataException { |
| // if (status.isRunFileWriting()) { |
| // flushAndStopRunFile(accessor); |
| // startReadingRunFile(accessor); |
| // } else { |
| // runFileReader.reset(); |
| // |
| // // Load first frame |
| // loadNextBuffer(accessor); |
| // } |
| // } |
| |
| public boolean loadNextBuffer(ITupleAccessor accessor) throws HyracksDataException { |
| if (runFileReader.nextFrame(runFileBuffer)) { |
| accessor.reset(runFileBuffer.getBuffer()); |
| accessor.next(); |
| readCount++; |
| return true; |
| } |
| return false; |
| } |
| |
| public long getReadPointer() throws HyracksDataException { |
| return runFileReader.getReadPointer(); |
| } |
| |
| public void resetReadPointer(long fileOffset) throws HyracksDataException { |
| runFileReader.reset(fileOffset); |
| } |
| |
| public void flushAndStopRunFile(ITupleAccessor accessor) throws HyracksDataException { |
| status.setRunFileWriting(false); |
| |
| // Copy left over tuples into new run file. |
| if (status.isRunFileReading()) { |
| if (!accessor.exists()) { |
| loadNextBuffer(accessor); |
| } |
| while (accessor.exists()) { |
| addToRunFile(accessor); |
| accessor.next(); |
| if (!accessor.exists()) { |
| loadNextBuffer(accessor); |
| } |
| } |
| runFileReader.close(); |
| } |
| |
| // Flush buffer. |
| if (runFileAppender.getTupleCount() > 0) { |
| runFileAppender.write(runFileWriter, true); |
| writeCount++; |
| } |
| } |
| |
| public void closeRunFileReading() throws HyracksDataException { |
| status.setRunFileReading(false); |
| runFileReader.close(); |
| } |
| |
| public void close() throws HyracksDataException { |
| if (runFileReader != null) { |
| runFileReader.close(); |
| } |
| if (runFileWriter != null) { |
| runFileWriter.close(); |
| } |
| } |
| |
| } |