| /* |
| * 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.sdk.io; |
| |
| import java.io.Serializable; |
| import java.util.Map; |
| import org.apache.avro.Schema; |
| import org.apache.avro.file.CodecFactory; |
| import org.apache.beam.sdk.io.FileBasedSink.FilenamePolicy; |
| import org.apache.beam.sdk.transforms.SerializableFunction; |
| import org.apache.beam.sdk.transforms.display.DisplayData; |
| import org.apache.beam.sdk.transforms.display.HasDisplayData; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Function; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Supplier; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Suppliers; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.io.BaseEncoding; |
| import org.checkerframework.checker.nullness.qual.Nullable; |
| |
| /** Always returns a constant {@link FilenamePolicy}, {@link Schema}, metadata, and codec. */ |
| @SuppressWarnings({ |
| "nullness" // TODO(https://issues.apache.org/jira/browse/BEAM-10402) |
| }) |
| class ConstantAvroDestination<UserT, OutputT> |
| extends DynamicAvroDestinations<UserT, Void, OutputT> { |
| private static class SchemaFunction implements Serializable, Function<String, Schema> { |
| @Override |
| public Schema apply(String input) { |
| return new Schema.Parser().parse(input); |
| } |
| } |
| |
| // This should be a multiple of 4 to not get a partial encoded byte. |
| private static final int METADATA_BYTES_MAX_LENGTH = 40; |
| private final FilenamePolicy filenamePolicy; |
| private final Supplier<Schema> schema; |
| private final Map<String, Object> metadata; |
| private final SerializableAvroCodecFactory codec; |
| private final SerializableFunction<UserT, OutputT> formatFunction; |
| private final AvroSink.DatumWriterFactory<OutputT> datumWriterFactory; |
| |
| private class Metadata implements HasDisplayData { |
| @Override |
| public void populateDisplayData(DisplayData.Builder builder) { |
| for (Map.Entry<String, Object> entry : metadata.entrySet()) { |
| DisplayData.Type type = DisplayData.inferType(entry.getValue()); |
| if (type != null) { |
| builder.add(DisplayData.item(entry.getKey(), type, entry.getValue())); |
| } else { |
| String base64 = BaseEncoding.base64().encode((byte[]) entry.getValue()); |
| String repr = |
| base64.length() <= METADATA_BYTES_MAX_LENGTH |
| ? base64 |
| : base64.substring(0, METADATA_BYTES_MAX_LENGTH) + "..."; |
| builder.add(DisplayData.item(entry.getKey(), repr)); |
| } |
| } |
| } |
| } |
| |
| public ConstantAvroDestination( |
| FilenamePolicy filenamePolicy, |
| Schema schema, |
| Map<String, Object> metadata, |
| CodecFactory codec, |
| SerializableFunction<UserT, OutputT> formatFunction) { |
| this(filenamePolicy, schema, metadata, codec, formatFunction, null); |
| } |
| |
| public ConstantAvroDestination( |
| FilenamePolicy filenamePolicy, |
| Schema schema, |
| Map<String, Object> metadata, |
| CodecFactory codec, |
| SerializableFunction<UserT, OutputT> formatFunction, |
| AvroSink.@Nullable DatumWriterFactory<OutputT> datumWriterFactory) { |
| this.filenamePolicy = filenamePolicy; |
| this.schema = Suppliers.compose(new SchemaFunction(), Suppliers.ofInstance(schema.toString())); |
| this.metadata = metadata; |
| this.codec = new SerializableAvroCodecFactory(codec); |
| this.formatFunction = formatFunction; |
| this.datumWriterFactory = datumWriterFactory; |
| } |
| |
| @Override |
| public OutputT formatRecord(UserT record) { |
| return formatFunction.apply(record); |
| } |
| |
| @Override |
| public @Nullable Void getDestination(UserT element) { |
| return (Void) null; |
| } |
| |
| @Override |
| public @Nullable Void getDefaultDestination() { |
| return (Void) null; |
| } |
| |
| @Override |
| public FilenamePolicy getFilenamePolicy(Void destination) { |
| return filenamePolicy; |
| } |
| |
| @Override |
| public Schema getSchema(Void destination) { |
| return schema.get(); |
| } |
| |
| @Override |
| public Map<String, Object> getMetadata(Void destination) { |
| return metadata; |
| } |
| |
| @Override |
| public CodecFactory getCodec(Void destination) { |
| return codec.getCodec(); |
| } |
| |
| @Override |
| public AvroSink.@Nullable DatumWriterFactory<OutputT> getDatumWriterFactory(Void destination) { |
| return datumWriterFactory; |
| } |
| |
| @Override |
| public void populateDisplayData(DisplayData.Builder builder) { |
| filenamePolicy.populateDisplayData(builder); |
| builder.add(DisplayData.item("schema", schema.get().toString()).withLabel("Record Schema")); |
| builder.addIfNotDefault( |
| DisplayData.item("codec", codec.getCodec().toString()).withLabel("Avro Compression Codec"), |
| AvroIO.TypedWrite.DEFAULT_SERIALIZABLE_CODEC.toString()); |
| builder.include("Metadata", new Metadata()); |
| } |
| } |