| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 at |
| * |
| * 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 org.apache.beam.runners.dataflow.worker; |
| |
| import com.google.api.services.dataflow.model.CounterUpdate; |
| import com.google.api.services.dataflow.model.SourceOperationRequest; |
| import com.google.api.services.dataflow.model.SourceOperationResponse; |
| import com.google.api.services.dataflow.model.SourceSplitRequest; |
| import java.io.Closeable; |
| import java.util.Collections; |
| import org.apache.beam.runners.core.metrics.ExecutionStateTracker; |
| import org.apache.beam.runners.core.metrics.ExecutionStateTracker.ExecutionState; |
| import org.apache.beam.runners.dataflow.worker.counters.CounterSet; |
| import org.apache.beam.sdk.options.PipelineOptions; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** An executor for a source operation, defined by a {@code SourceOperationRequest}. */ |
| public class WorkerCustomSourceOperationExecutor implements SourceOperationExecutor { |
| private static final Logger LOG = |
| LoggerFactory.getLogger(WorkerCustomSourceOperationExecutor.class); |
| private final PipelineOptions options; |
| private final SourceOperationRequest request; |
| private final CounterSet counters; |
| private SourceOperationResponse response; |
| |
| private ExecutionStateTracker executionStateTracker; |
| private ExecutionState executionState; |
| |
| public WorkerCustomSourceOperationExecutor( |
| PipelineOptions options, |
| SourceOperationRequest request, |
| CounterSet counters, |
| DataflowExecutionContext executionContext, |
| DataflowOperationContext operationContext) { |
| this.counters = counters; |
| this.options = options; |
| this.request = request; |
| this.executionStateTracker = executionContext.getExecutionStateTracker(); |
| this.executionState = operationContext.newExecutionState(getOperationDescription(request)); |
| } |
| |
| @Override |
| public CounterSet getOutputCounters() { |
| return counters; |
| } |
| |
| private static String getOperationDescription(SourceOperationRequest request) { |
| if (request.getSplit() != null) { |
| return "split"; |
| } else { |
| throw new UnsupportedOperationException("Unsupported source operation request: " + request); |
| } |
| } |
| |
| @Override |
| public void execute() throws Exception { |
| LOG.debug("Executing source operation"); |
| try (Closeable stateTrackerCloser = executionStateTracker.activate()) { |
| try (Closeable stateCloser = executionStateTracker.enterState(executionState)) { |
| SourceSplitRequest split = request.getSplit(); |
| if (split != null) { |
| this.response = WorkerCustomSources.performSplit(split, options); |
| } else { |
| throw new UnsupportedOperationException( |
| "Unsupported source operation request: " + request); |
| } |
| } |
| } |
| LOG.debug("Source operation execution complete"); |
| } |
| |
| @Override |
| public SourceOperationResponse getResponse() { |
| return response; |
| } |
| |
| @Override |
| public Iterable<CounterUpdate> extractMetricUpdates() { |
| return Collections.emptyList(); |
| } |
| } |