kafka FenceProducersResult 源码
kafka FenceProducersResult 代码
文件路径:/clients/src/main/java/org/apache/kafka/clients/admin/FenceProducersResult.java
/*
* 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 org.apache.kafka.clients.admin.internals.CoordinatorKey;
import org.apache.kafka.common.KafkaFuture;
import org.apache.kafka.common.annotation.InterfaceStability;
import org.apache.kafka.common.utils.ProducerIdAndEpoch;
import java.util.Collection;
import java.util.Map;
import java.util.stream.Collectors;
/**
* The result of the {@link Admin#fenceProducers(Collection)} call.
*
* The API of this class is evolving, see {@link Admin} for details.
*/
@InterfaceStability.Evolving
public class FenceProducersResult {
private final Map<CoordinatorKey, KafkaFuture<ProducerIdAndEpoch>> futures;
FenceProducersResult(Map<CoordinatorKey, KafkaFuture<ProducerIdAndEpoch>> futures) {
this.futures = futures;
}
/**
* Return a map from transactional ID to futures which can be used to check the status of
* individual fencings.
*/
public Map<String, KafkaFuture<Void>> fencedProducers() {
return futures.entrySet().stream().collect(Collectors.toMap(
e -> e.getKey().idValue,
e -> e.getValue().thenApply(p -> null)
));
}
/**
* Returns a future that provides the producer ID generated while initializing the given transaction when the request completes.
*/
public KafkaFuture<Long> producerId(String transactionalId) {
return findAndApply(transactionalId, p -> p.producerId);
}
/**
* Returns a future that provides the epoch ID generated while initializing the given transaction when the request completes.
*/
public KafkaFuture<Short> epochId(String transactionalId) {
return findAndApply(transactionalId, p -> p.epoch);
}
/**
* Return a future which succeeds only if all the producer fencings succeed.
*/
public KafkaFuture<Void> all() {
return KafkaFuture.allOf(futures.values().toArray(new KafkaFuture[0]));
}
private <T> KafkaFuture<T> findAndApply(String transactionalId, KafkaFuture.BaseFunction<ProducerIdAndEpoch, T> followup) {
CoordinatorKey key = CoordinatorKey.byTransactionalId(transactionalId);
KafkaFuture<ProducerIdAndEpoch> future = futures.get(key);
if (future == null) {
throw new IllegalArgumentException("TransactionalId " +
"`" + transactionalId + "` was not included in the request");
}
return future.thenApply(followup);
}
}
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