CalvinKirs commented on code in PR #2595: URL: https://github.com/apache/incubator-seatunnel/pull/2595#discussion_r961229663
########## seatunnel-connectors-v2/connector-influxdb/src/main/java/org/apache/seatunnel/connectors/seatunnel/influxdb/source/InfluxDBSourceSplitEnumerator.java: ########## @@ -0,0 +1,161 @@ +/* + * 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.seatunnel.connectors.seatunnel.influxdb.source; + +import static org.apache.seatunnel.connectors.seatunnel.influxdb.config.InfluxDBConfig.SQL_WHERE; + +import org.apache.seatunnel.api.source.SourceSplitEnumerator; +import org.apache.seatunnel.common.config.Common; +import org.apache.seatunnel.connectors.seatunnel.influxdb.config.InfluxDBConfig; +import org.apache.seatunnel.connectors.seatunnel.influxdb.state.InfluxDBSourceState; + +import java.io.IOException; +import java.util.ArrayList; +import java.util.Collection; +import java.util.Collections; +import java.util.HashMap; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.Set; + +public class InfluxDBSourceSplitEnumerator implements SourceSplitEnumerator<InfluxDBSourceSplit, InfluxDBSourceState> { + final InfluxDBConfig config; + + private final Context<InfluxDBSourceSplit> context; + private Set<InfluxDBSourceSplit> pendingSplit; + private Set<InfluxDBSourceSplit> assignedSplit; + + public InfluxDBSourceSplitEnumerator(SourceSplitEnumerator.Context<InfluxDBSourceSplit> context, InfluxDBConfig config) { + this.context = context; + this.config = config; + } + + public InfluxDBSourceSplitEnumerator(SourceSplitEnumerator.Context<InfluxDBSourceSplit> context, InfluxDBSourceState sourceState, InfluxDBConfig config) { + this(context, config); + this.assignedSplit = sourceState.getAssignedSplit(); + } + + @Override + public void open() { + this.assignedSplit = new HashSet<>(); + this.pendingSplit = new HashSet<>(); + } + + @Override + public void run() throws Exception { + pendingSplit = getInfluxDBSplit(); + assignSplit(context.registeredReaders()); + } + + @Override + public void close() throws IOException { + //nothing to do + } + + @Override + public void addSplitsBack(List splits, int subtaskId) { + if (!splits.isEmpty()) { + pendingSplit.addAll(splits); + assignSplit(Collections.singletonList(subtaskId)); + } + } + + @Override + public int currentUnassignedSplitSize() { + return pendingSplit.size(); + } + + @Override + public void handleSplitRequest(int subtaskId) { + //nothing to do + } + + @Override + public void registerReader(int subtaskId) { + if (!pendingSplit.isEmpty()) { + assignSplit(Collections.singletonList(subtaskId)); + } + } + + @Override + public InfluxDBSourceState snapshotState(long checkpointId) throws Exception { + return new InfluxDBSourceState(assignedSplit); + } + + @Override + public void notifyCheckpointComplete(long checkpointId) throws Exception { + //nothing to do + + } + + private Set<InfluxDBSourceSplit> getInfluxDBSplit() { + String sql = config.getSql(); + Set<InfluxDBSourceSplit> influxDBSourceSplits = new HashSet<>(); + // no need numPartitions, use one partition + if (config.getPartitionNum() == 0) { + influxDBSourceSplits.add(new InfluxDBSourceSplit(InfluxDBConfig.DEFAULT_PARTITIONS, sql)); + return influxDBSourceSplits; + } + long start = config.getLowerBound(); + long end = config.getUpperBound(); + int numPartitions = config.getPartitionNum(); + String[] sqls = sql.split(SQL_WHERE); + if (sqls.length > 2) { + throw new IllegalArgumentException("sql should not contain more than one where"); + } + int size = (int) (end - start) / numPartitions + 1; + int remainder = (int) ((end + 1 - start) % numPartitions); + if (end - start < numPartitions) { + numPartitions = (int) (end - start); + } + long currentStart = start; + int i = 0; + while (i < numPartitions) { + String query = " where (" + config.getSplitKey() + " >= " + currentStart + " and " + config.getSplitKey() + " < " + (currentStart + size) + ") "; + i++; + currentStart += size; + if (i + 1 <= numPartitions) { + currentStart = currentStart - remainder; + } + query = sqls[0] + query; + if (sqls.length > 1) { + query = query + " and ( " + sqls[1] + " ) "; + } + influxDBSourceSplits.add(new InfluxDBSourceSplit(String.valueOf(i + System.nanoTime()), query)); + } + return influxDBSourceSplits; + } Review Comment: extract this piece of logic as a public method? WDYT? -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
