| /* |
| * 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.dataflow.common.io; |
| |
| import java.nio.ByteBuffer; |
| |
| import edu.uci.ics.hyracks.api.comm.IFrameWriter; |
| import edu.uci.ics.hyracks.api.exceptions.HyracksDataException; |
| import edu.uci.ics.hyracks.api.io.FileReference; |
| import edu.uci.ics.hyracks.api.io.IFileHandle; |
| import edu.uci.ics.hyracks.api.io.IIOManager; |
| |
| public class RunFileWriter implements IFrameWriter { |
| private final FileReference file; |
| private final IIOManager ioManager; |
| private boolean failed; |
| |
| private IFileHandle handle; |
| private long size; |
| |
| public RunFileWriter(FileReference file, IIOManager ioManager) { |
| this.file = file; |
| this.ioManager = ioManager; |
| } |
| |
| @Override |
| public void open() throws HyracksDataException { |
| handle = ioManager.open(file, IIOManager.FileReadWriteMode.READ_WRITE, |
| IIOManager.FileSyncMode.METADATA_ASYNC_DATA_ASYNC); |
| size = 0; |
| failed = false; |
| } |
| |
| @Override |
| public void fail() throws HyracksDataException { |
| ioManager.close(handle); |
| failed = true; |
| } |
| |
| @Override |
| public void nextFrame(ByteBuffer buffer) throws HyracksDataException { |
| size += ioManager.syncWrite(handle, size, buffer); |
| } |
| |
| @Override |
| public void close() throws HyracksDataException { |
| if (!failed) { |
| ioManager.close(handle); |
| } |
| } |
| |
| public FileReference getFileReference() { |
| return file; |
| } |
| |
| public long getFileSize() { |
| return size; |
| } |
| |
| public RunFileReader createReader() throws HyracksDataException { |
| if (failed) { |
| throw new HyracksDataException("createReader() called on a failed RunFileWriter"); |
| } |
| return new RunFileReader(file, ioManager, size); |
| } |
| } |