| /* |
| * 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 static com.google.api.client.util.Preconditions.checkArgument; |
| import static org.apache.beam.runners.dataflow.util.Structs.getLong; |
| import static org.apache.beam.runners.dataflow.util.Structs.getString; |
| |
| import com.google.auto.service.AutoService; |
| import java.util.Map; |
| import javax.annotation.Nullable; |
| import org.apache.beam.runners.dataflow.util.CloudObject; |
| import org.apache.beam.runners.dataflow.worker.util.WorkerPropertyNames; |
| import org.apache.beam.runners.dataflow.worker.util.common.worker.NativeReader; |
| import org.apache.beam.sdk.coders.Coder; |
| import org.apache.beam.sdk.options.PipelineOptions; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.collect.ImmutableMap; |
| |
| /** Creates an {@link AvroByteReader} from a CloudObject spec. */ |
| public class AvroByteReaderFactory implements ReaderFactory { |
| |
| /** A {@link ReaderFactory.Registrar} for Avro byte sources. */ |
| @AutoService(ReaderFactory.Registrar.class) |
| public static class Registrar implements ReaderFactory.Registrar { |
| |
| @Override |
| public Map<String, ReaderFactory> factories() { |
| return ImmutableMap.of("AvroSource", new AvroByteReaderFactory()); |
| } |
| } |
| |
| public AvroByteReaderFactory() {} |
| |
| @Override |
| public NativeReader<?> create( |
| CloudObject spec, |
| @Nullable Coder<?> coder, |
| @Nullable PipelineOptions options, |
| @Nullable DataflowExecutionContext executionContext, |
| DataflowOperationContext operationContext) |
| throws Exception { |
| checkArgument(coder != null, "coder must not be null"); |
| checkArgument(options != null, "options must not be null"); |
| return create(spec, coder, options); |
| } |
| |
| NativeReader<?> create(CloudObject spec, Coder<?> coder, PipelineOptions options) |
| throws Exception { |
| String filename = getString(spec, WorkerPropertyNames.FILENAME); |
| long startOffset = getLong(spec, WorkerPropertyNames.START_OFFSET, 0L); |
| long endOffset = getLong(spec, WorkerPropertyNames.END_OFFSET, Long.MAX_VALUE); |
| return new AvroByteReader<>(filename, startOffset, endOffset, coder, options); |
| } |
| } |