kafka ExpiringCredential 源码
kafka ExpiringCredential 代码
文件路径：/clients/src/main/java/org/apache/kafka/common/security/oauthbearer/internals/expiring/ExpiringCredential.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.common.security.oauthbearer.internals.expiring;
/**
* A credential that expires and that can potentially be refreshed
*
* @see ExpiringCredentialRefreshingLogin
*/
public interface ExpiringCredential {
/**
* The name of the principal to which this credential applies (used only for
* logging)
*
* @return the always non-null/non-empty principal name
*/
String principalName();
/**
* When the credential became valid, in terms of the number of milliseconds
* since the epoch, if known, otherwise null. An expiring credential may not
* necessarily indicate when it was created -- just when it expires -- so we
* need to support a null return value here.
*
* @return the time when the credential became valid, in terms of the number of
* milliseconds since the epoch, if known, otherwise null
*/
Long startTimeMs();
/**
* When the credential expires, in terms of the number of milliseconds since the
* epoch. All expiring credentials by definition must indicate their expiration
* time -- thus, unlike other methods, we do not support a null return value
* here.
*
* @return the time when the credential expires, in terms of the number of
* milliseconds since the epoch
*/
long expireTimeMs();
/**
* The point after which the credential can no longer be refreshed, in terms of
* the number of milliseconds since the epoch, if any, otherwise null. Some
* expiring credentials can be refreshed over and over again without limit, so
* we support a null return value here.
*
* @return the point after which the credential can no longer be refreshed, in
* terms of the number of milliseconds since the epoch, if any,
* otherwise null
*/
Long absoluteLastRefreshTimeMs();
}
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