kafka ZkConfigRepository 源码
kafka ZkConfigRepository 代码
文件路径:/core/src/main/scala/kafka/server/metadata/ZkConfigRepository.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 kafka.server.metadata
import java.util.Properties
import kafka.server.{ConfigEntityName, ConfigType}
import kafka.zk.{AdminZkClient, KafkaZkClient}
import org.apache.kafka.common.config.ConfigResource
import org.apache.kafka.common.config.ConfigResource.Type
object ZkConfigRepository {
def apply(zkClient: KafkaZkClient): ZkConfigRepository =
new ZkConfigRepository(new AdminZkClient(zkClient))
}
class ZkConfigRepository(adminZkClient: AdminZkClient) extends ConfigRepository {
override def config(configResource: ConfigResource): Properties = {
val configTypeForZk = configResource.`type` match {
case Type.TOPIC => ConfigType.Topic
case Type.BROKER => ConfigType.Broker
case tpe => throw new IllegalArgumentException(s"Unsupported config type: $tpe")
}
// ZK stores cluster configs under "<default>".
val effectiveName = if (configResource.`type`.equals(Type.BROKER) &&
configResource.name.isEmpty) {
ConfigEntityName.Default
} else {
configResource.name
}
adminZkClient.fetchEntityConfig(configTypeForZk, effectiveName)
}
}
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