org.apache.flink.connector.pulsar.source.UniformSplitDivisionStrategy Maven / Gradle / Ivy
/*
* Licensed 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.pulsar.source;
import org.apache.flink.api.connector.source.SplitEnumeratorContext;
import org.apache.flink.connector.pulsar.source.split.PulsarPartitionSplit;
import org.apache.flink.streaming.connectors.pulsar.internal.SourceSinkUtils;
import org.apache.pulsar.client.admin.PulsarAdmin;
import org.apache.pulsar.client.admin.PulsarAdminException;
import org.apache.pulsar.client.api.Range;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
/**
* Split strategy for keyShared mode.
*/
public class UniformSplitDivisionStrategy implements SplitDivisionStrategy {
public static final UniformSplitDivisionStrategy INSTANCE = new UniformSplitDivisionStrategy();
private UniformSplitDivisionStrategy() {
}
@Override
public Collection getRanges(String topic, PulsarAdmin pulsarAdmin, SplitEnumeratorContext context) throws PulsarAdminException {
int numReaders = context.currentParallelism();
List rangeList = new ArrayList<>();
for (int subtaskIdx = 0; subtaskIdx < numReaders; subtaskIdx++) {
Range range = SourceSinkUtils.distributeRange(numReaders, subtaskIdx);
rangeList.add(range);
}
return rangeList;
}
}