org.apache.kafka.clients.admin.ElectLeadersResult Maven / Gradle / Ivy
/*
* 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.kafka.clients.admin;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import org.apache.kafka.common.ElectionType;
import org.apache.kafka.common.KafkaFuture;
import org.apache.kafka.common.TopicPartition;
import org.apache.kafka.common.annotation.InterfaceStability;
import org.apache.kafka.common.internals.KafkaFutureImpl;
/**
* The result of {@link Admin#electLeaders(ElectionType, Set, ElectLeadersOptions)}
*
* The API of this class is evolving, see {@link Admin} for details.
*/
@InterfaceStability.Evolving
final public class ElectLeadersResult {
private final KafkaFuture>> electionFuture;
ElectLeadersResult(KafkaFuture>> electionFuture) {
this.electionFuture = electionFuture;
}
/**
* Get a future for the topic partitions for which a leader election was attempted.
* If the election succeeded then the value for a topic partition will be the empty Optional.
* Otherwise the election failed and the Optional will be set with the error.
*/
public KafkaFuture>> partitions() {
return electionFuture;
}
/**
* Return a future which succeeds if all the topic elections succeed.
*/
public KafkaFuture all() {
final KafkaFutureImpl result = new KafkaFutureImpl<>();
partitions().whenComplete(
new KafkaFuture.BiConsumer>, Throwable>() {
@Override
public void accept(Map> topicPartitions, Throwable throwable) {
if (throwable != null) {
result.completeExceptionally(throwable);
} else {
for (Optional exception : topicPartitions.values()) {
if (exception.isPresent()) {
result.completeExceptionally(exception.get());
return;
}
}
result.complete(null);
}
}
});
return result;
}
}