| /* |
| * 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.pregelix.dataflow; |
| |
| import java.nio.ByteBuffer; |
| import java.util.logging.Logger; |
| |
| import org.apache.hadoop.conf.Configuration; |
| |
| 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.exceptions.HyracksDataException; |
| import edu.uci.ics.hyracks.api.job.JobSpecification; |
| import edu.uci.ics.hyracks.dataflow.std.base.AbstractSingleActivityOperatorDescriptor; |
| import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryInputSinkOperatorNodePushable; |
| import edu.uci.ics.pregelix.dataflow.base.IConfigurationFactory; |
| import edu.uci.ics.pregelix.dataflow.util.IterationUtils; |
| |
| public class TerminationStateWriterOperatorDescriptor extends AbstractSingleActivityOperatorDescriptor { |
| private static final long serialVersionUID = 1L; |
| private static final Logger LOGGER = Logger.getLogger(TerminationStateWriterOperatorDescriptor.class.getName()); |
| |
| private final IConfigurationFactory confFactory; |
| private final String jobId; |
| |
| public TerminationStateWriterOperatorDescriptor(JobSpecification spec, IConfigurationFactory confFactory, |
| String jobId) { |
| super(spec, 1, 0); |
| this.confFactory = confFactory; |
| this.jobId = jobId; |
| } |
| |
| @Override |
| public IOperatorNodePushable createPushRuntime(IHyracksTaskContext ctx, |
| IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) throws HyracksDataException { |
| return new AbstractUnaryInputSinkOperatorNodePushable() { |
| private Configuration conf = confFactory.createConfiguration(); |
| private boolean terminate = true; |
| |
| @Override |
| public void open() throws HyracksDataException { |
| terminate = true; |
| } |
| |
| @Override |
| public void nextFrame(ByteBuffer buffer) throws HyracksDataException { |
| terminate = false; |
| } |
| |
| @Override |
| public void fail() throws HyracksDataException { |
| |
| } |
| |
| @Override |
| public void close() throws HyracksDataException { |
| IterationUtils.writeTerminationState(conf, jobId, terminate); |
| LOGGER.info("close termination state"); |
| if (terminate) |
| LOGGER.info("write termination to HDFS"); |
| } |
| |
| }; |
| } |
| } |