| /* |
| * 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.union; |
| |
| import java.nio.ByteBuffer; |
| |
| import edu.uci.ics.hyracks.api.comm.IFrameWriter; |
| import edu.uci.ics.hyracks.api.context.IHyracksTaskContext; |
| import edu.uci.ics.hyracks.api.dataflow.ActivityId; |
| import edu.uci.ics.hyracks.api.dataflow.IActivityGraphBuilder; |
| 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.IOperatorDescriptorRegistry; |
| 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.AbstractUnaryOutputOperatorNodePushable; |
| |
| public class UnionAllOperatorDescriptor extends AbstractOperatorDescriptor { |
| public UnionAllOperatorDescriptor(IOperatorDescriptorRegistry spec, int nInputs, RecordDescriptor recordDescriptor) { |
| super(spec, nInputs, 1); |
| recordDescriptors[0] = recordDescriptor; |
| } |
| |
| private static final long serialVersionUID = 1L; |
| |
| @Override |
| public void contributeActivities(IActivityGraphBuilder builder) { |
| UnionActivityNode uba = new UnionActivityNode(new ActivityId(getOperatorId(), 0)); |
| builder.addActivity(this, uba); |
| for (int i = 0; i < inputArity; ++i) { |
| builder.addSourceEdge(i, uba, i); |
| } |
| builder.addTargetEdge(0, uba, 0); |
| } |
| |
| private class UnionActivityNode extends AbstractActivityNode { |
| private static final long serialVersionUID = 1L; |
| |
| public UnionActivityNode(ActivityId id) { |
| super(id); |
| } |
| |
| @Override |
| public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx, |
| IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) |
| throws HyracksDataException { |
| RecordDescriptor inRecordDesc = recordDescProvider.getInputRecordDescriptor(getActivityId(), 0); |
| return new UnionOperator(ctx, inRecordDesc); |
| } |
| } |
| |
| private class UnionOperator extends AbstractUnaryOutputOperatorNodePushable { |
| private int nOpened; |
| |
| private int nClosed; |
| |
| private boolean failed; |
| |
| public UnionOperator(IHyracksTaskContext ctx, RecordDescriptor inRecordDesc) { |
| nOpened = 0; |
| nClosed = 0; |
| } |
| |
| @Override |
| public int getInputArity() { |
| return inputArity; |
| } |
| |
| @Override |
| public IFrameWriter getInputFrameWriter(int index) { |
| return new IFrameWriter() { |
| @Override |
| public void open() throws HyracksDataException { |
| synchronized (UnionOperator.this) { |
| if (++nOpened == 1) { |
| writer.open(); |
| } |
| } |
| } |
| |
| @Override |
| public void nextFrame(ByteBuffer buffer) throws HyracksDataException { |
| synchronized (UnionOperator.this) { |
| writer.nextFrame(buffer); |
| } |
| } |
| |
| @Override |
| public void fail() throws HyracksDataException { |
| synchronized (UnionOperator.this) { |
| if (failed) { |
| writer.fail(); |
| } |
| failed = true; |
| } |
| } |
| |
| @Override |
| public void close() throws HyracksDataException { |
| synchronized (UnionOperator.this) { |
| if (++nClosed == inputArity) { |
| writer.close(); |
| } |
| } |
| } |
| }; |
| } |
| } |
| } |