org.apache.kafka.clients.admin.ListTransactionsResult Maven / Gradle / Ivy
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/*
* 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.common.KafkaFuture;
import org.apache.kafka.common.annotation.InterfaceStability;
import org.apache.kafka.common.internals.KafkaFutureImpl;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
* The result of the {@link Admin#listTransactions()} call.
*
* The API of this class is evolving, see {@link Admin} for details.
*/
@InterfaceStability.Evolving
public class ListTransactionsResult {
private final KafkaFuture>>> future;
ListTransactionsResult(KafkaFuture>>> future) {
this.future = future;
}
/**
* Get all transaction listings. If any of the underlying requests fail, then the future
* returned from this method will also fail with the first encountered error.
*
* @return A future containing the collection of transaction listings. The future completes
* when all transaction listings are available and fails after any non-retriable error.
*/
public KafkaFuture> all() {
return allByBrokerId().thenApply(map -> {
List allListings = new ArrayList<>();
for (Collection listings : map.values()) {
allListings.addAll(listings);
}
return allListings;
});
}
/**
* Get a future which returns a map containing the underlying listing future for each broker
* in the cluster. This is useful, for example, if a partial listing of transactions is
* sufficient, or if you want more granular error details.
*
* @return A future containing a map of futures by broker which complete individually when
* their respective transaction listings are available. The top-level future returned
* from this method may fail if the admin client is unable to lookup the available
* brokers in the cluster.
*/
public KafkaFuture>>> byBrokerId() {
KafkaFutureImpl>>> result = new KafkaFutureImpl<>();
future.whenComplete((brokerFutures, exception) -> {
if (brokerFutures != null) {
Map>> brokerFuturesCopy =
new HashMap<>(brokerFutures.size());
brokerFuturesCopy.putAll(brokerFutures);
result.complete(brokerFuturesCopy);
} else {
result.completeExceptionally(exception);
}
});
return result;
}
/**
* Get all transaction listings in a map which is keyed by the ID of respective broker
* that is currently managing them. If any of the underlying requests fail, then the future
* returned from this method will also fail with the first encountered error.
*
* @return A future containing a map from the broker ID to the transactions hosted by that
* broker respectively. This future completes when all transaction listings are
* available and fails after any non-retriable error.
*/
public KafkaFuture>> allByBrokerId() {
KafkaFutureImpl>> allFuture = new KafkaFutureImpl<>();
Map> allListingsMap = new HashMap<>();
future.whenComplete((map, topLevelException) -> {
if (topLevelException != null) {
allFuture.completeExceptionally(topLevelException);
return;
}
Set remainingResponses = new HashSet<>(map.keySet());
map.forEach((brokerId, future) -> {
future.whenComplete((listings, brokerException) -> {
if (brokerException != null) {
allFuture.completeExceptionally(brokerException);
} else if (!allFuture.isDone()) {
allListingsMap.put(brokerId, listings);
remainingResponses.remove(brokerId);
if (remainingResponses.isEmpty()) {
allFuture.complete(allListingsMap);
}
}
});
});
});
return allFuture;
}
}