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[BEAM-2879] Support writing data to BigQuery via avro
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steve
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Nov 8, 2019
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62 changes: 62 additions & 0 deletions
62
...oogle-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/bigquery/AvroRowWriter.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| /* | ||
| * 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.gcp.bigquery; | ||
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|
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| import java.io.IOException; | ||
| import org.apache.avro.Schema; | ||
| import org.apache.avro.file.DataFileWriter; | ||
| import org.apache.avro.generic.GenericDatumWriter; | ||
| import org.apache.avro.generic.GenericRecord; | ||
| import org.apache.beam.sdk.transforms.SerializableFunction; | ||
| import org.apache.beam.sdk.util.MimeTypes; | ||
|
|
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| class AvroRowWriter<T> extends BigQueryRowWriter<T> { | ||
| private final DataFileWriter<GenericRecord> writer; | ||
| private final Schema schema; | ||
| private final SerializableFunction<AvroWriteRequest<T>, GenericRecord> toAvroRecord; | ||
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|
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| AvroRowWriter( | ||
| String basename, | ||
| Schema schema, | ||
| SerializableFunction<AvroWriteRequest<T>, GenericRecord> toAvroRecord) | ||
| throws Exception { | ||
| super(basename, MimeTypes.BINARY); | ||
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|
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| this.schema = schema; | ||
| this.toAvroRecord = toAvroRecord; | ||
| this.writer = | ||
| new DataFileWriter<GenericRecord>(new GenericDatumWriter<>()) | ||
| .create(schema, getOutputStream()); | ||
| } | ||
|
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| @Override | ||
| public void write(T element) throws IOException { | ||
| AvroWriteRequest<T> writeRequest = new AvroWriteRequest<>(element, schema); | ||
| writer.append(toAvroRecord.apply(writeRequest)); | ||
| } | ||
|
|
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| public Schema getSchema() { | ||
| return this.schema; | ||
| } | ||
|
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| @Override | ||
| public void close() throws IOException { | ||
| writer.close(); | ||
| super.close(); | ||
| } | ||
| } |
38 changes: 38 additions & 0 deletions
38
...le-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/bigquery/AvroWriteRequest.java
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| /* | ||
| * 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.gcp.bigquery; | ||
|
|
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| import org.apache.avro.Schema; | ||
|
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| public class AvroWriteRequest<T> { | ||
| private final T element; | ||
| private final Schema schema; | ||
|
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| AvroWriteRequest(T element, Schema schema) { | ||
| this.element = element; | ||
| this.schema = schema; | ||
| } | ||
|
|
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| public T getElement() { | ||
| return element; | ||
| } | ||
|
|
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| public Schema getSchema() { | ||
| return schema; | ||
| } | ||
| } |
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