| /* |
| * 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 edu.uci.ics.hyracks.api.application.INCApplicationContext; |
| 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.TaskId; |
| 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.io.FileReference; |
| import edu.uci.ics.hyracks.api.job.JobSpecification; |
| import edu.uci.ics.hyracks.dataflow.common.io.RunFileWriter; |
| 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.AbstractUnaryInputUnaryOutputOperatorNodePushable; |
| import edu.uci.ics.pregelix.dataflow.context.RuntimeContext; |
| import edu.uci.ics.pregelix.dataflow.state.MaterializerTaskState; |
| import edu.uci.ics.pregelix.dataflow.util.IterationUtils; |
| |
| public class MaterializingWriteOperatorDescriptor extends AbstractOperatorDescriptor { |
| private static final long serialVersionUID = 1L; |
| private final static int MATERIALIZER_ACTIVITY_ID = 0; |
| |
| public MaterializingWriteOperatorDescriptor(JobSpecification spec, RecordDescriptor recordDescriptor) { |
| super(spec, 1, 1); |
| recordDescriptors[0] = recordDescriptor; |
| } |
| |
| @Override |
| public void contributeActivities(IActivityGraphBuilder builder) { |
| MaterializerActivityNode ma = new MaterializerActivityNode(new ActivityId(odId, MATERIALIZER_ACTIVITY_ID)); |
| |
| builder.addActivity(this, ma); |
| builder.addSourceEdge(0, ma, 0); |
| builder.addTargetEdge(0, ma, 0); |
| } |
| |
| private final class MaterializerActivityNode extends AbstractActivityNode { |
| private static final long serialVersionUID = 1L; |
| |
| public MaterializerActivityNode(ActivityId id) { |
| super(id); |
| } |
| |
| @Override |
| public IOperatorNodePushable createPushRuntime(final IHyracksTaskContext ctx, |
| IRecordDescriptorProvider recordDescProvider, final int partition, int nPartitions) { |
| return new AbstractUnaryInputUnaryOutputOperatorNodePushable() { |
| private MaterializerTaskState state; |
| |
| @Override |
| public void open() throws HyracksDataException { |
| state = new MaterializerTaskState(ctx.getJobletContext().getJobId(), new TaskId(getActivityId(), |
| partition)); |
| INCApplicationContext appContext = ctx.getJobletContext().getApplicationContext(); |
| RuntimeContext context = (RuntimeContext) appContext.getApplicationObject(); |
| FileReference file = context.createManagedWorkspaceFile(MaterializingWriteOperatorDescriptor.class |
| .getSimpleName()); |
| state.setRunFileWriter(new RunFileWriter(file, ctx.getIOManager())); |
| state.getRunFileWriter().open(); |
| writer.open(); |
| } |
| |
| @Override |
| public void nextFrame(ByteBuffer buffer) throws HyracksDataException { |
| state.getRunFileWriter().nextFrame(buffer); |
| } |
| |
| @Override |
| public void close() throws HyracksDataException { |
| state.getRunFileWriter().close(); |
| /** |
| * set iteration state |
| */ |
| IterationUtils.setIterationState(ctx, partition, state); |
| writer.close(); |
| } |
| |
| @Override |
| public void fail() throws HyracksDataException { |
| } |
| }; |
| } |
| } |
| } |