本文整理汇总了Scala中org.apache.zookeeper.Watcher类的典型用法代码示例。如果您正苦于以下问题：Scala Watcher类的具体用法？Scala Watcher怎么用？Scala Watcher使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了Watcher类的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Scala代码示例。
示例1: ApacheWatcher
//设置package包名称以及导入依赖的类
package com.twitter.finagle.serverset2.client.apache
import com.twitter.finagle.serverset2.client.{EventDeliveryThread, EventStats, WatchState}
import com.twitter.finagle.stats.{NullStatsReceiver, StatsReceiver}
import com.twitter.util.Var
import org.apache.zookeeper.{Watcher, WatchedEvent}
private[serverset2] class ApacheWatcher(statsIn: StatsReceiver = NullStatsReceiver)
extends Watcher with EventStats {
protected val stats = statsIn
val state = Var[WatchState](WatchState.Pending)
def process(event: WatchedEvent) = {
event.getType match {
case Watcher.Event.EventType.None =>
EventDeliveryThread.offer(
state,
WatchState.SessionState(ApacheSessionState(event.getState)))
case e =>
EventDeliveryThread.offer(
state,
WatchState.Determined(EventFilter(ApacheNodeEvent(e))))
}
}
} 示例2: ZooKeeperHealthHandler
//设置package包名称以及导入依赖的类
package com.twitter.finagle.zookeeper
import com.twitter.common.quantity.{Amount, Time => CommonTime}
import com.twitter.common.zookeeper.{ZooKeeperClient, ZooKeeperUtils}
import com.twitter.concurrent.{Offer, Broker, AsyncMutex}
import com.twitter.conversions.common.quantity._
import com.twitter.finagle.addr.StabilizingAddr.State._
import com.twitter.finagle.util.InetSocketAddressUtil
import com.twitter.util.Duration
import java.net.InetSocketAddress
import org.apache.zookeeper.Watcher.Event.KeeperState
import org.apache.zookeeper.{Watcher, WatchedEvent}
import scala.collection.JavaConverters._
import scala.collection._
private[finagle] class ZooKeeperHealthHandler extends Watcher {
private[this] val mu = new AsyncMutex
val pulse = new Broker[Health]()
def process(evt: WatchedEvent) = for {
permit <- mu.acquire()
() <- evt.getState match {
case KeeperState.SyncConnected => pulse ! Healthy
case _ => pulse ! Unhealthy
}
} permit.release()
}
private[finagle] object DefaultZkClientFactory
extends ZkClientFactory(Amount.of(
ZooKeeperUtils.DEFAULT_ZK_SESSION_TIMEOUT.getValue.toLong,
ZooKeeperUtils.DEFAULT_ZK_SESSION_TIMEOUT.getUnit).toDuration)
private[finagle] class ZkClientFactory(val sessionTimeout: Duration) {
private[this] val zkClients: mutable.Map[Set[InetSocketAddress], ZooKeeperClient] = mutable.Map()
def hostSet(hosts: String) = InetSocketAddressUtil.parseHosts(hosts).toSet
def get(zkHosts: Set[InetSocketAddress]): (ZooKeeperClient, Offer[Health]) = synchronized {
val client = zkClients.getOrElseUpdate(zkHosts, new ZooKeeperClient(
Amount.of(sessionTimeout.inMillis.toInt, CommonTime.MILLISECONDS),
zkHosts.asJava))
// TODO: Watchers are tied to the life of the client,
// which, in turn, is tied to the life of ZkClientFactory.
// Maybe we should expose a way to unregister watchers.
val healthHandler = new ZooKeeperHealthHandler
client.register(healthHandler)
(client, healthHandler.pulse.recv)
}
private[zookeeper] def clear() = synchronized { zkClients.clear() }
} 示例3: ZKApi
//设置package包名称以及导入依赖的类
package org.kylin.scala.zookeeper
import org.apache.zookeeper.{WatchedEvent, Watcher, ZooKeeper}
object ZKApi {
def main(args: Array[String]): Unit = {
val zkAddress = "ip"
val zkClientPort = "2181"
val zkWatcher = new Watcher {
override def process(event: WatchedEvent): Unit = println("watcher!")
}
val zkTest: ZooKeeper = new ZooKeeper(zkAddress, zkClientPort.toInt, zkWatcher)
zkTest.getChildren("/", zkWatcher).toString.foreach(print)
}
}