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https://issues.apache.org/jira/browse/FLINK-9679?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16571399#comment-16571399
]
ASF GitHub Bot commented on FLINK-9679:
---------------------------------------
dawidwys commented on a change in pull request #6259: [FLINK-9679] Implement
AvroSerializationSchema
URL: https://github.com/apache/flink/pull/6259#discussion_r208166496
##########
File path:
flink-formats/flink-avro/src/main/java/org/apache/flink/formats/avro/AvroSerializationSchema.java
##########
@@ -0,0 +1,134 @@
+/*
+ * 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.flink.formats.avro;
+
+import org.apache.flink.api.common.serialization.SerializationSchema;
+import org.apache.flink.util.Preconditions;
+
+import org.apache.avro.Schema;
+import org.apache.avro.generic.GenericDatumWriter;
+import org.apache.avro.io.BinaryEncoder;
+import org.apache.avro.io.EncoderFactory;
+import org.apache.avro.specific.SpecificData;
+import org.apache.avro.specific.SpecificDatumWriter;
+import org.apache.avro.specific.SpecificRecord;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
+/**
+ * Serialization schema that serializes from Avro binary format.
+ *
+ * @param <T> type of record it produces
+ */
+public class AvroSerializationSchema<T> implements SerializationSchema<T> {
+
+ /**
+ * Creates {@link AvroSerializationSchema} that produces {@link
SpecificRecord} using provided schema.
+ *
+ * @param tClass class of record to be produced
+ * @return topic record in form of {@link SpecificRecord}
+ */
+ public static <T extends SpecificRecord> AvroSerializationSchema<T>
forSpecific(Class<T> tClass) {
+ return new AvroSerializationSchema<>(tClass);
+ }
+
+ private static final long serialVersionUID = -8766681879020862312L;
+
+ /**
+ * Class to serialize from.
+ */
+ private Class<T> recordClazz;
+
+ /**
+ * Write the serializes byte array into a record.
+ */
+ private transient GenericDatumWriter<T> datumWriter;
+
+ /**
+ * Output stream to write message to.
+ */
+ private transient ByteArrayOutputStream arrayOutputStream;
+
+ /**
+ * Avro encoder that encodes binary data.
+ */
+ private transient BinaryEncoder encoder;
+
+ /**
+ * Creates Avro Serialization schema.
+ *
+ * @param recordClazz class to which serialize which is
+ * {@link SpecificRecord}.
+ */
+
+ AvroSerializationSchema(Class<T> recordClazz) {
+ Preconditions.checkNotNull(recordClazz, "Avro record class must
not be null.");
+ this.recordClazz = recordClazz;
+
+ }
+
+ BinaryEncoder getEncoder() {
+ return encoder;
+ }
+
+ GenericDatumWriter<T> getDatumWriter() {
+ return datumWriter;
+ }
+
+ ByteArrayOutputStream getOutputStream() {
+ return arrayOutputStream;
+ }
+
+ @Override
+ public byte[] serialize(T object) {
+ checkAvroInitialized();
+
+ if (object == null) {
+ return null;
+ } else {
+ try {
+ arrayOutputStream.write(0);
+ datumWriter.write(object, encoder);
+ encoder.flush();
+ byte[] bytes = arrayOutputStream.toByteArray();
+ arrayOutputStream.close();
+ return bytes;
+ } catch (RuntimeException | IOException e) {
Review comment:
See no point in catching the `RuntimeException`. Use
`WrappingRuntimeException` for `IOException`.
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> Implement AvroSerializationSchema
> ---------------------------------
>
> Key: FLINK-9679
> URL: https://issues.apache.org/jira/browse/FLINK-9679
> Project: Flink
> Issue Type: Improvement
> Affects Versions: 1.6.0
> Reporter: Yazdan Shirvany
> Assignee: Yazdan Shirvany
> Priority: Major
> Labels: pull-request-available
>
> Implement AvroSerializationSchema using Confluent Schema Registry
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