| /* |
| * Copyright 2009-2013 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.pregelix.dataflow; |
| |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.OutputStreamWriter; |
| import java.io.PrintWriter; |
| import java.nio.ByteBuffer; |
| |
| import edu.uci.ics.hyracks.api.context.IHyracksTaskContext; |
| import edu.uci.ics.hyracks.api.dataflow.IOperatorNodePushable; |
| import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider; |
| import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor; |
| import edu.uci.ics.hyracks.api.exceptions.HyracksDataException; |
| import edu.uci.ics.hyracks.api.job.JobSpecification; |
| import edu.uci.ics.hyracks.dataflow.common.comm.io.FrameDeserializer; |
| import edu.uci.ics.hyracks.dataflow.std.base.AbstractSingleActivityOperatorDescriptor; |
| import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputSinkOperatorNodePushable; |
| import edu.uci.ics.hyracks.dataflow.std.file.FileSplit; |
| import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider; |
| import edu.uci.ics.hyracks.dataflow.std.util.StringSerializationUtils; |
| import edu.uci.ics.pregelix.dataflow.std.base.IRecordDescriptorFactory; |
| import edu.uci.ics.pregelix.dataflow.std.base.IRuntimeHookFactory; |
| |
| public class VertexWriteOperatorDescriptor extends AbstractSingleActivityOperatorDescriptor { |
| private static final long serialVersionUID = 1L; |
| private final FileSplit[] splits; |
| private final IRuntimeHookFactory preHookFactory; |
| private final IRuntimeHookFactory postHookFactory; |
| private final IRecordDescriptorFactory inputRdFactory; |
| |
| public VertexWriteOperatorDescriptor(JobSpecification spec, IRecordDescriptorFactory inputRdFactory, |
| IFileSplitProvider fileSplitProvider, IRuntimeHookFactory preHookFactory, |
| IRuntimeHookFactory postHookFactory) { |
| super(spec, 1, 0); |
| this.splits = fileSplitProvider.getFileSplits(); |
| this.preHookFactory = preHookFactory; |
| this.postHookFactory = postHookFactory; |
| this.inputRdFactory = inputRdFactory; |
| } |
| |
| @Override |
| public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx, |
| final IRecordDescriptorProvider recordDescProvider, final int partition, int nPartitions) |
| throws HyracksDataException { |
| IOperatorNodePushable op = new AbstractUnaryInputSinkOperatorNodePushable() { |
| private RecordDescriptor rd0; |
| private FrameDeserializer frameDeserializer; |
| private PrintWriter outputWriter; |
| |
| @Override |
| public void open() throws HyracksDataException { |
| rd0 = inputRdFactory == null ? recordDescProvider.getInputRecordDescriptor(getActivityId(), 0) |
| : inputRdFactory.createRecordDescriptor(ctx); |
| frameDeserializer = new FrameDeserializer(ctx.getFrameSize(), rd0); |
| try { |
| outputWriter = new PrintWriter(new OutputStreamWriter(new FileOutputStream(splits[partition] |
| .getLocalFile().getFile()))); |
| if (preHookFactory != null) |
| preHookFactory.createRuntimeHook().configure(ctx); |
| } catch (IOException e) { |
| throw new HyracksDataException(e); |
| } |
| } |
| |
| @Override |
| public void nextFrame(ByteBuffer frame) throws HyracksDataException { |
| frameDeserializer.reset(frame); |
| while (!frameDeserializer.done()) { |
| Object[] tuple = frameDeserializer.deserializeRecord(); |
| // output the vertex |
| outputWriter.print(StringSerializationUtils.toString(tuple[tuple.length - 1])); |
| outputWriter.println(); |
| } |
| } |
| |
| @Override |
| public void fail() throws HyracksDataException { |
| |
| } |
| |
| @Override |
| public void close() throws HyracksDataException { |
| if (postHookFactory != null) |
| postHookFactory.createRuntimeHook().configure(ctx); |
| outputWriter.close(); |
| } |
| |
| }; |
| return op; |
| } |
| } |