org.apache.kafka.streams.processor.internals.assignment.StandbyTaskAssignorFactory Maven / Gradle / Ivy
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* 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,
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package org.apache.kafka.streams.processor.internals.assignment;
import static org.apache.kafka.common.utils.Utils.mkEntry;
import static org.apache.kafka.common.utils.Utils.mkMap;
import java.util.Collections;
import java.util.Map;
import java.util.UUID;
class StandbyTaskAssignorFactory {
private StandbyTaskAssignorFactory() {}
static StandbyTaskAssignor create(final AssignorConfiguration.AssignmentConfigs configs,
final RackAwareTaskAssignor rackAwareTaskAssignor) {
if (!configs.rackAwareAssignmentTags.isEmpty()) {
return new ClientTagAwareStandbyTaskAssignor();
} else if (rackAwareTaskAssignor != null && rackAwareTaskAssignor.validClientRack()) {
// racksForProcess should be populated if rackAwareTaskAssignor isn't null
final Map racksForProcess = rackAwareTaskAssignor.racksForProcess();
return new ClientTagAwareStandbyTaskAssignor(
(processId, clientState) -> mkMap(mkEntry("rack", racksForProcess.get(processId))),
assignmentConfigs -> Collections.singletonList("rack")
);
} else {
return new DefaultStandbyTaskAssignor();
}
}
}