westphal-jan commented on a change in pull request #15140: URL: https://github.com/apache/flink/pull/15140#discussion_r594321883
########## File path: flink-connectors/flink-connector-rabbitmq2/src/main/java/org/apache/flink/connector/rabbitmq2/source/RabbitMQSource.java ########## @@ -0,0 +1,189 @@ +/* + * 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.rabbitmq2.source; + +import org.apache.flink.api.common.serialization.DeserializationSchema; +import org.apache.flink.api.common.typeinfo.TypeInformation; +import org.apache.flink.api.connector.source.Boundedness; +import org.apache.flink.api.connector.source.Source; +import org.apache.flink.api.connector.source.SourceReader; +import org.apache.flink.api.connector.source.SourceReaderContext; +import org.apache.flink.api.connector.source.SplitEnumerator; +import org.apache.flink.api.connector.source.SplitEnumeratorContext; +import org.apache.flink.api.java.typeutils.ResultTypeQueryable; +import org.apache.flink.connector.rabbitmq2.ConsistencyMode; +import org.apache.flink.connector.rabbitmq2.RabbitMQConnectionConfig; +import org.apache.flink.connector.rabbitmq2.source.enumerator.RabbitMQSourceEnumState; +import org.apache.flink.connector.rabbitmq2.source.enumerator.RabbitMQSourceEnumStateSerializer; +import org.apache.flink.connector.rabbitmq2.source.enumerator.RabbitMQSourceEnumerator; +import org.apache.flink.connector.rabbitmq2.source.reader.RabbitMQSourceReaderBase; +import org.apache.flink.connector.rabbitmq2.source.reader.specialized.RabbitMQSourceReaderAtLeastOnce; +import org.apache.flink.connector.rabbitmq2.source.reader.specialized.RabbitMQSourceReaderAtMostOnce; +import org.apache.flink.connector.rabbitmq2.source.reader.specialized.RabbitMQSourceReaderExactlyOnce; +import org.apache.flink.connector.rabbitmq2.source.split.RabbitMQSourceSplit; +import org.apache.flink.connector.rabbitmq2.source.split.RabbitMQSourceSplitSerializer; +import org.apache.flink.core.io.SimpleVersionedSerializer; + +import com.esotericsoftware.minlog.Log; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * The source implementation of rabbitmq. Please use a {@link RabbitMQSourceBuilder} to construct + * the source. The following example shows how to create a RabbitMQSource emitting records of <code> + * String</code> type. + * + * <pre>{@code + * RabbitMQSource<String> source = RabbitMQSource + * .<String>builder() + * .setConnectionConfig(MY_RMQ_CONNECTION_CONFIG) + * .setQueueName("myQueue") + * .setDeliveryDeserializer(new SimpleStringSchema()) + * .setConsistencyMode(MY_CONSISTENCY_MODE) + * .build(); + * }</pre> + * + * <p>See {@link RabbitMQSourceBuilder} for more details. + * + * @param <T> the output type of the source. + */ +public class RabbitMQSource<T> + implements Source<T, RabbitMQSourceSplit, RabbitMQSourceEnumState>, ResultTypeQueryable<T> { + private static final Logger LOG = LoggerFactory.getLogger(RabbitMQSource.class); + + private final RabbitMQConnectionConfig connectionConfig; + private final String queueName; + private final DeserializationSchema<T> deserializationSchema; + private final ConsistencyMode consistencyMode; + + public RabbitMQSource( + RabbitMQConnectionConfig connectionConfig, + String queueName, + DeserializationSchema<T> deserializationSchema, + ConsistencyMode consistencyMode) { + this.connectionConfig = connectionConfig; + this.queueName = queueName; + this.deserializationSchema = deserializationSchema; + this.consistencyMode = consistencyMode; + + LOG.info("Create rabbitmq source"); + } + + /** + * Get a {@link RabbitMQSourceBuilder} for the source. + * + * @param <T> type of the source. + * @return a source builder + * @see RabbitMQSourceBuilder + */ + public static <T> RabbitMQSourceBuilder<T> builder() { + return new RabbitMQSourceBuilder<>(); + } + + /** + * The boundedness is always continuous unbounded. + * + * @return Boundedness continuous unbounded. + * @see Boundedness + */ + @Override + public Boundedness getBoundedness() { + return Boundedness.CONTINUOUS_UNBOUNDED; + } + + /** + * Returns a new initialized source reader of the source's consistency mode. + * + * @param sourceReaderContext context which the reader will be created in. + * @return RabbitMQSourceReader a source reader of the specified consistency type. + * @see RabbitMQSourceReaderBase + */ + @Override + public SourceReader<T, RabbitMQSourceSplit> createReader( + SourceReaderContext sourceReaderContext) { + LOG.info("New Source Reader of type " + consistencyMode + " requested."); + switch (consistencyMode) { + case AT_MOST_ONCE: + return new RabbitMQSourceReaderAtMostOnce<>( + sourceReaderContext, deserializationSchema); + case AT_LEAST_ONCE: + return new RabbitMQSourceReaderAtLeastOnce<>( + sourceReaderContext, deserializationSchema); + case EXACTLY_ONCE: + return new RabbitMQSourceReaderExactlyOnce<>( + sourceReaderContext, deserializationSchema); + default: + Log.error("The requested reader of type " + consistencyMode + " is not supported"); Review comment: Done. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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