org.apache.kafka.clients.admin.DescribeUserScramCredentialsResult 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.errors.ResourceNotFoundException;
import org.apache.kafka.common.internals.KafkaFutureImpl;
import org.apache.kafka.common.message.DescribeUserScramCredentialsResponseData;
import org.apache.kafka.common.protocol.Errors;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
import java.util.stream.Collectors;
/**
* The result of the {@link Admin#describeUserScramCredentials()} call.
*
* The API of this class is evolving, see {@link Admin} for details.
*/
@InterfaceStability.Evolving
public class DescribeUserScramCredentialsResult {
private final KafkaFuture dataFuture;
/**
* Package-private constructor
*
* @param dataFuture the future indicating response data from the call
*/
DescribeUserScramCredentialsResult(KafkaFuture dataFuture) {
this.dataFuture = Objects.requireNonNull(dataFuture);
}
/**
*
* @return a future for the results of all described users with map keys (one per user) being consistent with the
* contents of the list returned by {@link #users()}. The future will complete successfully only if all such user
* descriptions complete successfully.
*/
public KafkaFuture> all() {
final KafkaFutureImpl> retval = new KafkaFutureImpl<>();
dataFuture.whenComplete((data, throwable) -> {
if (throwable != null) {
retval.completeExceptionally(throwable);
} else {
/* Check to make sure every individual described user succeeded. Note that a successfully described user
* is one that appears with *either* a NONE error code or a RESOURCE_NOT_FOUND error code. The
* RESOURCE_NOT_FOUND means the client explicitly requested a describe of that particular user but it could
* not be described because it does not exist; such a user will not appear as a key in the returned map.
*/
Optional optionalFirstFailedDescribe =
data.results().stream().filter(result ->
result.errorCode() != Errors.NONE.code() && result.errorCode() != Errors.RESOURCE_NOT_FOUND.code()).findFirst();
if (optionalFirstFailedDescribe.isPresent()) {
retval.completeExceptionally(Errors.forCode(optionalFirstFailedDescribe.get().errorCode()).exception(optionalFirstFailedDescribe.get().errorMessage()));
} else {
Map retvalMap = new HashMap<>();
data.results().stream().forEach(userResult ->
retvalMap.put(userResult.user(), new UserScramCredentialsDescription(userResult.user(),
getScramCredentialInfosFor(userResult))));
retval.complete(retvalMap);
}
}
});
return retval;
}
/**
*
* @return a future indicating the distinct users that meet the request criteria and that have at least one
* credential. The future will not complete successfully if the user is not authorized to perform the describe
* operation; otherwise, it will complete successfully as long as the list of users with credentials can be
* successfully determined within some hard-coded timeout period. Note that the returned list will not include users
* that do not exist/have no credentials: a request to describe an explicit list of users, none of which existed/had
* a credential, will result in a future that returns an empty list being returned here. A returned list will
* include users that have a credential but that could not be described.
*/
public KafkaFuture> users() {
final KafkaFutureImpl> retval = new KafkaFutureImpl<>();
dataFuture.whenComplete((data, throwable) -> {
if (throwable != null) {
retval.completeExceptionally(throwable);
} else {
retval.complete(data.results().stream()
.filter(result -> result.errorCode() != Errors.RESOURCE_NOT_FOUND.code())
.map(result -> result.user()).collect(Collectors.toList()));
}
});
return retval;
}
/**
*
* @param userName the name of the user description being requested
* @return a future indicating the description results for the given user. The future will complete exceptionally if
* the future returned by {@link #users()} completes exceptionally. Note that if the given user does not exist in
* the list of described users then the returned future will complete exceptionally with
* {@link org.apache.kafka.common.errors.ResourceNotFoundException}.
*/
public KafkaFuture description(String userName) {
final KafkaFutureImpl retval = new KafkaFutureImpl<>();
dataFuture.whenComplete((data, throwable) -> {
if (throwable != null) {
retval.completeExceptionally(throwable);
} else {
// it is possible that there is no future for this user (for example, the original describe request was
// for users 1, 2, and 3 but this is looking for user 4), so explicitly take care of that case
Optional optionalUserResult =
data.results().stream().filter(result -> result.user().equals(userName)).findFirst();
if (!optionalUserResult.isPresent()) {
retval.completeExceptionally(new ResourceNotFoundException("No such user: " + userName));
} else {
DescribeUserScramCredentialsResponseData.DescribeUserScramCredentialsResult userResult = optionalUserResult.get();
if (userResult.errorCode() != Errors.NONE.code()) {
// RESOURCE_NOT_FOUND is included here
retval.completeExceptionally(Errors.forCode(userResult.errorCode()).exception(userResult.errorMessage()));
} else {
retval.complete(new UserScramCredentialsDescription(userResult.user(), getScramCredentialInfosFor(userResult)));
}
}
}
});
return retval;
}
private static List getScramCredentialInfosFor(
DescribeUserScramCredentialsResponseData.DescribeUserScramCredentialsResult userResult) {
return userResult.credentialInfos().stream().map(c ->
new ScramCredentialInfo(ScramMechanism.fromType(c.mechanism()), c.iterations()))
.collect(Collectors.toList());
}
}