kafka.server.KafkaServerStartable.scala Maven / Gradle / Ivy
/**
* 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
import java.util.Properties
import kafka.metrics.KafkaMetricsReporter
import kafka.utils.{Exit, Logging, VerifiableProperties}
import scala.collection.Seq
object KafkaServerStartable {
def fromProps(serverProps: Properties): KafkaServerStartable = {
fromProps(serverProps, None)
}
def fromProps(serverProps: Properties, threadNamePrefix: Option[String]): KafkaServerStartable = {
val reporters = KafkaMetricsReporter.startReporters(new VerifiableProperties(serverProps))
new KafkaServerStartable(KafkaConfig.fromProps(serverProps, false), reporters, threadNamePrefix)
}
}
class KafkaServerStartable(val staticServerConfig: KafkaConfig, reporters: Seq[KafkaMetricsReporter], threadNamePrefix: Option[String] = None) extends Logging {
private val server = new KafkaServer(staticServerConfig, kafkaMetricsReporters = reporters, threadNamePrefix = threadNamePrefix)
def this(serverConfig: KafkaConfig) = this(serverConfig, Seq.empty)
def startup(): Unit = {
try server.startup()
catch {
case _: Throwable =>
// KafkaServer.startup() calls shutdown() in case of exceptions, so we invoke `exit` to set the status code
fatal("Exiting Kafka.")
Exit.exit(1)
}
}
def shutdown(): Unit = {
try server.shutdown()
catch {
case _: Throwable =>
fatal("Halting Kafka.")
// Calling exit() can lead to deadlock as exit() can be called multiple times. Force exit.
Exit.halt(1)
}
}
/**
* Allow setting broker state from the startable.
* This is needed when a custom kafka server startable want to emit new states that it introduces.
*/
def setServerState(newState: Byte): Unit = {
server.brokerState.newState(newState)
}
def awaitShutdown(): Unit = server.awaitShutdown()
}