| /* |
| * 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.std.misc; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import edu.uci.ics.hyracks.api.context.IHyracksStageletContext; |
| import edu.uci.ics.hyracks.api.dataflow.ActivityNodeId; |
| import edu.uci.ics.hyracks.api.dataflow.IActivityGraphBuilder; |
| import edu.uci.ics.hyracks.api.dataflow.IOpenableDataWriter; |
| import edu.uci.ics.hyracks.api.dataflow.IOperatorDescriptor; |
| 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.IOperatorEnvironment; |
| import edu.uci.ics.hyracks.api.job.JobSpecification; |
| import edu.uci.ics.hyracks.dataflow.std.base.AbstractActivityNode; |
| import edu.uci.ics.hyracks.dataflow.std.base.AbstractOperatorDescriptor; |
| import edu.uci.ics.hyracks.dataflow.std.base.IOpenableDataWriterOperator; |
| import edu.uci.ics.hyracks.dataflow.std.util.DeserializedOperatorNodePushable; |
| |
| public class SplitVectorOperatorDescriptor extends AbstractOperatorDescriptor { |
| private class CollectActivity extends AbstractActivityNode { |
| private static final long serialVersionUID = 1L; |
| |
| @Override |
| public ActivityNodeId getActivityNodeId() { |
| return id; |
| } |
| |
| @Override |
| public IOperatorDescriptor getOwner() { |
| return SplitVectorOperatorDescriptor.this; |
| } |
| |
| @Override |
| public IOperatorNodePushable createPushRuntime(IHyracksStageletContext ctx, final IOperatorEnvironment env, |
| IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) { |
| IOpenableDataWriterOperator op = new IOpenableDataWriterOperator() { |
| private ArrayList<Object[]> buffer; |
| |
| @Override |
| public void setDataWriter(int index, IOpenableDataWriter<Object[]> writer) { |
| throw new IllegalArgumentException(); |
| } |
| |
| @Override |
| public void open() throws HyracksDataException { |
| buffer = new ArrayList<Object[]>(); |
| env.set(BUFFER, buffer); |
| } |
| |
| @Override |
| public void close() throws HyracksDataException { |
| |
| } |
| |
| @Override |
| public void writeData(Object[] data) throws HyracksDataException { |
| buffer.add(data); |
| } |
| }; |
| return new DeserializedOperatorNodePushable(ctx, op, recordDescProvider.getInputRecordDescriptor( |
| getOperatorId(), 0)); |
| } |
| } |
| |
| private class SplitActivity extends AbstractActivityNode { |
| private static final long serialVersionUID = 1L; |
| |
| @Override |
| public IOperatorDescriptor getOwner() { |
| return SplitVectorOperatorDescriptor.this; |
| } |
| |
| @Override |
| public IOperatorNodePushable createPushRuntime(IHyracksStageletContext ctx, final IOperatorEnvironment env, |
| IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) { |
| IOpenableDataWriterOperator op = new IOpenableDataWriterOperator() { |
| private IOpenableDataWriter<Object[]> writer; |
| |
| @Override |
| public void setDataWriter(int index, IOpenableDataWriter<Object[]> writer) { |
| if (index != 0) { |
| throw new IllegalArgumentException(); |
| } |
| this.writer = writer; |
| } |
| |
| @Override |
| public void open() throws HyracksDataException { |
| } |
| |
| @Override |
| public void close() throws HyracksDataException { |
| } |
| |
| @Override |
| public void writeData(Object[] data) throws HyracksDataException { |
| List<Object[]> buffer = (List<Object[]>) env.get(BUFFER); |
| int n = buffer.size(); |
| int step = (int) Math.floor(n / (float) splits); |
| writer.open(); |
| for (int i = 0; i < splits; ++i) { |
| writer.writeData(buffer.get(step * (i + 1) - 1)); |
| } |
| writer.close(); |
| } |
| }; |
| return new DeserializedOperatorNodePushable(ctx, op, recordDescProvider.getInputRecordDescriptor( |
| getOperatorId(), 0)); |
| } |
| } |
| |
| private static final String BUFFER = "buffer"; |
| |
| private static final long serialVersionUID = 1L; |
| |
| private final int splits; |
| |
| public SplitVectorOperatorDescriptor(JobSpecification spec, int splits, RecordDescriptor recordDescriptor) { |
| super(spec, 1, 1); |
| this.splits = splits; |
| recordDescriptors[0] = recordDescriptor; |
| } |
| |
| @Override |
| public void contributeTaskGraph(IActivityGraphBuilder builder) { |
| CollectActivity ca = new CollectActivity(); |
| SplitActivity sa = new SplitActivity(); |
| |
| builder.addTask(ca); |
| builder.addSourceEdge(0, ca, 0); |
| |
| builder.addTask(sa); |
| builder.addTargetEdge(0, sa, 0); |
| |
| builder.addBlockingEdge(ca, sa); |
| } |
| } |