| /* |
| * 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.control.nc.runtime; |
| |
| import java.nio.ByteBuffer; |
| |
| import edu.uci.ics.hyracks.api.comm.IFrameReader; |
| import edu.uci.ics.hyracks.api.comm.IFrameWriter; |
| import edu.uci.ics.hyracks.api.context.IHyracksContext; |
| import edu.uci.ics.hyracks.api.dataflow.IOperatorNodePushable; |
| import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor; |
| import edu.uci.ics.hyracks.api.exceptions.HyracksDataException; |
| |
| public class OperatorRunnable implements Runnable { |
| private final IOperatorNodePushable opNode; |
| private IFrameReader reader; |
| private ByteBuffer buffer; |
| private volatile boolean abort; |
| |
| public OperatorRunnable(IHyracksContext ctx, IOperatorNodePushable opNode) { |
| this.opNode = opNode; |
| buffer = ctx.getResourceManager().allocateFrame(); |
| } |
| |
| public void setFrameWriter(int index, IFrameWriter writer, RecordDescriptor recordDesc) { |
| opNode.setOutputFrameWriter(index, writer, recordDesc); |
| } |
| |
| public void setFrameReader(IFrameReader reader) { |
| this.reader = reader; |
| } |
| |
| public void abort() { |
| abort = true; |
| } |
| |
| @Override |
| public void run() { |
| try { |
| opNode.initialize(); |
| if (reader != null) { |
| IFrameWriter writer = opNode.getInputFrameWriter(0); |
| writer.open(); |
| reader.open(); |
| while (readFrame()) { |
| if (abort) { |
| break; |
| } |
| buffer.flip(); |
| writer.nextFrame(buffer); |
| buffer.compact(); |
| } |
| reader.close(); |
| writer.close(); |
| } |
| opNode.deinitialize(); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| protected boolean readFrame() throws HyracksDataException { |
| return reader.nextFrame(buffer); |
| } |
| |
| @Override |
| public String toString() { |
| return "OperatorRunnable[" + opNode.getDisplayName() + "]"; |
| } |
| } |