org.apache.kafka.clients.admin.ElectPreferredLeadersResult 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.Collection;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import org.apache.kafka.common.KafkaFuture;
import org.apache.kafka.common.TopicPartition;
import org.apache.kafka.common.annotation.InterfaceStability;
import org.apache.kafka.common.errors.UnknownTopicOrPartitionException;
import org.apache.kafka.common.internals.KafkaFutureImpl;
/**
* The result of {@link Admin#electPreferredLeaders(Collection, ElectPreferredLeadersOptions)}
*
* The API of this class is evolving, see {@link Admin} for details.
*
* @deprecated Since 2.4.0. Use {@link Admin#electLeaders(ElectionType, Set, ElectLeadersOptions)}.
*/
@InterfaceStability.Evolving
@Deprecated
public class ElectPreferredLeadersResult {
private final ElectLeadersResult electionResult;
ElectPreferredLeadersResult(ElectLeadersResult electionResult) {
this.electionResult = electionResult;
}
/**
* Get the result of the election for the given {@code partition}.
* If there was not an election triggered for the given {@code partition}, the
* returned future will complete with an error.
*/
public KafkaFuture partitionResult(final TopicPartition partition) {
final KafkaFutureImpl result = new KafkaFutureImpl<>();
electionResult.partitions().whenComplete(
new KafkaFuture.BiConsumer>, Throwable>() {
@Override
public void accept(Map> topicPartitions, Throwable throwable) {
if (throwable != null) {
result.completeExceptionally(throwable);
} else if (!topicPartitions.containsKey(partition)) {
result.completeExceptionally(new UnknownTopicOrPartitionException(
"Preferred leader election for partition \"" + partition +
"\" was not attempted"));
} else {
Optional exception = topicPartitions.get(partition);
if (exception.isPresent()) {
result.completeExceptionally(exception.get());
} else {
result.complete(null);
}
}
}
});
return result;
}
/**
* Get a future for the topic partitions for which a leader election
* was attempted. A partition will be present in this result if
* an election was attempted even if the election was not successful.
*
* This method is provided to discover the partitions attempted when
* {@link Admin#electPreferredLeaders(Collection)} is called
* with a null {@code partitions} argument.
*/
public KafkaFuture> partitions() {
final KafkaFutureImpl> result = new KafkaFutureImpl<>();
electionResult.partitions().whenComplete(
new KafkaFuture.BiConsumer>, Throwable>() {
@Override
public void accept(Map> topicPartitions, Throwable throwable) {
if (throwable != null) {
result.completeExceptionally(throwable);
} else {
result.complete(topicPartitions.keySet());
}
}
});
return result;
}
/**
* Return a future which succeeds if all the topic elections succeed.
*/
public KafkaFuture all() {
return electionResult.all();
}
}