hlteoh37 commented on code in PR #141: URL: https://github.com/apache/flink-connector-aws/pull/141#discussion_r1625705602
########## flink-connector-aws/flink-connector-sqs/src/main/java/org.apache.flink.connector.sqs/sink/SqsSinkElementConverter.java: ########## @@ -0,0 +1,105 @@ +/* + * 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.connector.sqs.sink; + +import org.apache.flink.annotation.Internal; +import org.apache.flink.api.common.serialization.SerializationSchema; +import org.apache.flink.api.connector.sink2.Sink; +import org.apache.flink.api.connector.sink2.SinkWriter; +import org.apache.flink.connector.base.sink.writer.ElementConverter; +import org.apache.flink.metrics.MetricGroup; +import org.apache.flink.metrics.groups.UnregisteredMetricsGroup; +import org.apache.flink.util.FlinkRuntimeException; +import org.apache.flink.util.Preconditions; +import org.apache.flink.util.SimpleUserCodeClassLoader; +import org.apache.flink.util.UserCodeClassLoader; + +import software.amazon.awssdk.services.sqs.model.SendMessageBatchRequestEntry; + +import java.nio.charset.StandardCharsets; +import java.util.UUID; + +/** + * An implementation of the {@link ElementConverter} that uses the AWS SQS SDK v2. The user only + * needs to provide a {@link SerializationSchema} of the {@code InputT} to transform it into a + * {@link SendMessageBatchRequestEntry} that may be persisted. + */ +@Internal +public class SqsSinkElementConverter<InputT> + implements ElementConverter<InputT, SendMessageBatchRequestEntry> { + + /** A serialization schema to specify how the input element should be serialized. */ + private final SerializationSchema<InputT> serializationSchema; + + private SqsSinkElementConverter(SerializationSchema<InputT> serializationSchema) { + this.serializationSchema = serializationSchema; + } + + @Override + public SendMessageBatchRequestEntry apply(InputT element, SinkWriter.Context context) { + final byte[] messageBody = serializationSchema.serialize(element); + return SendMessageBatchRequestEntry.builder() + .id(UUID.randomUUID().toString()) + .messageBody(new String(messageBody, StandardCharsets.UTF_8)) + .build(); + } + + @Override + public void open(Sink.InitContext context) { + try { + serializationSchema.open( + new SerializationSchema.InitializationContext() { + @Override + public MetricGroup getMetricGroup() { + return new UnregisteredMetricsGroup(); + } + + @Override + public UserCodeClassLoader getUserCodeClassLoader() { + return SimpleUserCodeClassLoader.create( + SqsSinkElementConverter.class.getClassLoader()); + } + }); + } catch (Exception e) { + throw new FlinkRuntimeException("Failed to initialize serialization schema.", e); + } + } + + public static <InputT> Builder<InputT> builder() { + return new Builder<>(); + } + + /** A builder for the SqsSinkElementConverter. */ + public static class Builder<InputT> { + + private SerializationSchema<InputT> serializationSchema; + + public Builder<InputT> setSerializationSchema( + SerializationSchema<InputT> serializationSchema) { + this.serializationSchema = serializationSchema; + return this; + } + + public SqsSinkElementConverter<InputT> build() { + Preconditions.checkNotNull( + serializationSchema, + "No SerializationSchema was supplied to the " + "SQS Sink builder."); Review Comment: nit: `+` not needed here -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@flink.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
