martongreber commented on code in PR #8: URL: https://github.com/apache/flink-connector-kudu/pull/8#discussion_r1977734299
########## flink-connector-kudu/src/main/java/org/apache/flink/connector/kudu/source/KuduSource.java: ########## @@ -0,0 +1,130 @@ +/* + * 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.kudu.source; + +import org.apache.flink.annotation.PublicEvolving; +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.configuration.Configuration; +import org.apache.flink.connector.kudu.connector.KuduTableInfo; +import org.apache.flink.connector.kudu.connector.converter.RowResultConverter; +import org.apache.flink.connector.kudu.connector.reader.KuduReaderConfig; +import org.apache.flink.connector.kudu.source.config.BoundednessSettings; +import org.apache.flink.connector.kudu.source.enumerator.KuduSourceEnumerator; +import org.apache.flink.connector.kudu.source.enumerator.KuduSourceEnumeratorState; +import org.apache.flink.connector.kudu.source.enumerator.KuduSourceEnumeratorStateSerializer; +import org.apache.flink.connector.kudu.source.reader.KuduSourceReader; +import org.apache.flink.connector.kudu.source.reader.KuduSourceSplitReader; +import org.apache.flink.connector.kudu.source.split.KuduSourceSplit; +import org.apache.flink.connector.kudu.source.split.KuduSourceSplitSerializer; +import org.apache.flink.core.io.SimpleVersionedSerializer; + +/** + * A Flink {@link Source} for reading data from Apache Kudu. It supports both bounded and continuous + * unbounded modes, allowing it to function as a snapshot reader or as a CDC-like source that + * captures ongoing changes. + * + * <p>The behavior depends on the {@link BoundednessSettings}: + * + * <ul> + * <li>If {@code Boundedness.BOUNDED} is set, the source reads a snapshot of the table at a given + * point in time and emits only records from this fixed dataset. + * <li>If {@code Boundedness.CONTINUOUS_UNBOUNDED} is set, the source performs differential scans + * at configured intervals to continuously capture changes. + * </ul> + * + * <p>Key components: + * + * <ul> + * <li>{@link KuduReaderConfig} - Configures the Kudu connection, including master addresses. + * <li>{@link KuduTableInfo} - Specifies the target Kudu table, including its name and schema + * details. + * <li>{@link BoundednessSettings} - Defines the boundedness and polling interval, i.e., the time + * between consecutive scans. + * <li>{@link RowResultConverter} - Converts Kudu's {@code RowResult} into the desired output type + * {@code OUT}. + * </ul> + * + * @param <OUT> The type of the records produced by this source. + */ +@PublicEvolving +public class KuduSource<OUT> implements Source<OUT, KuduSourceSplit, KuduSourceEnumeratorState> { + private final KuduReaderConfig readerConfig; + private final KuduTableInfo tableInfo; + private final BoundednessSettings boundednessSettings; + private final RowResultConverter<OUT> rowResultConverter; + + private final Configuration configuration; + + KuduSource( + KuduReaderConfig readerConfig, + KuduTableInfo tableInfo, + BoundednessSettings boundednessSettings, + RowResultConverter<OUT> rowResultConverter) { + this.tableInfo = tableInfo; + this.readerConfig = readerConfig; + this.rowResultConverter = rowResultConverter; + this.boundednessSettings = boundednessSettings; + this.configuration = new Configuration(); + } + + @Override + public Boundedness getBoundedness() { + return boundednessSettings.getBoundedness(); + } + + @Override + public SplitEnumerator<KuduSourceSplit, KuduSourceEnumeratorState> createEnumerator( + SplitEnumeratorContext<KuduSourceSplit> enumContext) { + return new KuduSourceEnumerator(tableInfo, readerConfig, boundednessSettings, enumContext); + } + + @Override + public SplitEnumerator<KuduSourceSplit, KuduSourceEnumeratorState> restoreEnumerator( + SplitEnumeratorContext<KuduSourceSplit> enumContext, + KuduSourceEnumeratorState checkpoint) + throws Exception { + return new KuduSourceEnumerator( + tableInfo, readerConfig, boundednessSettings, enumContext, checkpoint); + } + + @Override + public SimpleVersionedSerializer<KuduSourceSplit> getSplitSerializer() { + return new KuduSourceSplitSerializer(); + } + + @Override + public SimpleVersionedSerializer<KuduSourceEnumeratorState> + getEnumeratorCheckpointSerializer() { + return new KuduSourceEnumeratorStateSerializer(); + } + + @Override + public SourceReader<OUT, KuduSourceSplit> createReader(SourceReaderContext readerContext) + throws Exception { + return new KuduSourceReader( Review Comment: thanks! done. -- This is an automated message from the Apache Git Service. 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