org.apache.spark.deploy.SparkCuratorUtil.scala 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,
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package org.apache.spark.deploy
import scala.collection.JavaConverters._
import org.apache.curator.framework.{CuratorFramework, CuratorFrameworkFactory}
import org.apache.curator.retry.ExponentialBackoffRetry
import org.apache.zookeeper.KeeperException
import org.apache.spark.SparkConf
import org.apache.spark.internal.Logging
private[spark] object SparkCuratorUtil extends Logging {
private val ZK_CONNECTION_TIMEOUT_MILLIS = 15000
private val ZK_SESSION_TIMEOUT_MILLIS = 60000
private val RETRY_WAIT_MILLIS = 5000
private val MAX_RECONNECT_ATTEMPTS = 3
def newClient(
conf: SparkConf,
zkUrlConf: String = "spark.deploy.zookeeper.url"): CuratorFramework = {
val ZK_URL = conf.get(zkUrlConf)
val zk = CuratorFrameworkFactory.newClient(ZK_URL,
ZK_SESSION_TIMEOUT_MILLIS, ZK_CONNECTION_TIMEOUT_MILLIS,
new ExponentialBackoffRetry(RETRY_WAIT_MILLIS, MAX_RECONNECT_ATTEMPTS))
zk.start()
zk
}
def mkdir(zk: CuratorFramework, path: String) {
if (zk.checkExists().forPath(path) == null) {
try {
zk.create().creatingParentsIfNeeded().forPath(path)
} catch {
case nodeExist: KeeperException.NodeExistsException =>
// do nothing, ignore node existing exception.
case e: Exception => throw e
}
}
}
def deleteRecursive(zk: CuratorFramework, path: String) {
if (zk.checkExists().forPath(path) != null) {
for (child <- zk.getChildren.forPath(path).asScala) {
zk.delete().forPath(path + "/" + child)
}
zk.delete().forPath(path)
}
}
}