spark HadoopDelegationTokenProvider 源码
spark HadoopDelegationTokenProvider 代码
文件路径：/core/src/main/scala/org/apache/spark/security/HadoopDelegationTokenProvider.scala
/*
* 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.spark.security
import org.apache.hadoop.conf.Configuration
import org.apache.hadoop.security.Credentials
import org.apache.spark.SparkConf
import org.apache.spark.annotation.DeveloperApi
/**
* ::DeveloperApi::
* Hadoop delegation token provider.
*/
@DeveloperApi
trait HadoopDelegationTokenProvider {
/**
* Name of the service to provide delegation tokens. This name should be unique. Spark will
* internally use this name to differentiate delegation token providers.
*/
def serviceName: String
/**
* Returns true if delegation tokens are required for this service. By default, it is based on
* whether Hadoop security is enabled.
*/
def delegationTokensRequired(sparkConf: SparkConf, hadoopConf: Configuration): Boolean
/**
* Obtain delegation tokens for this service and get the time of the next renewal.
* @param hadoopConf Configuration of current Hadoop Compatible system.
* @param creds Credentials to add tokens and security keys to.
* @return If the returned tokens are renewable and can be renewed, return the time of the next
* renewal, otherwise None should be returned.
*/
def obtainDelegationTokens(
hadoopConf: Configuration,
sparkConf: SparkConf,
creds: Credentials): Option[Long]
}
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