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Internal Metrics API. Fixes #939

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* Retreives metrics snapshots of the system the node is running on through JMX monitoring MBeans or Hyperic Sigar (is Sigar library is plugged)
        * Allows to set metrics alteration monitors that are triggered, when specific conditions are satisfied (e.g., not enough memory left on the node)
        * Nodes publish their local metrics to ZNodes
        * In order to maintain good performance, metrics manager internally caches snapshots, and refreshes them from time to time from ZooKeeper
This commit is contained in:
Vasil Remeniuk 2011-08-28 16:07:19 +03:00
parent cb9196c690
commit 3cee2fc8ec
15 changed files with 881 additions and 2 deletions
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15
akka-cluster/src/main/scala/akka/cluster/Cluster.scala
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@ -19,6 +19,7 @@ import scala.collection.mutable.ConcurrentMap
import scala.collection.JavaConversions._
import akka.util._
import duration._
import Helpers._
import akka.actor._
@ -39,6 +40,7 @@ import akka.serialization.{ Serialization, Serializer, ActorSerialization }
import ActorSerialization._
import akka.serialization.Compression.LZF
import akka.cluster.metrics._
import akka.cluster.zookeeper._
import ChangeListener._
import ClusterProtocol._
@ -150,6 +152,7 @@ object Cluster {
val zooKeeperServers = config.getString("akka.cluster.zookeeper-server-addresses", "localhost:2181")
val remoteServerPort = config.getInt("akka.cluster.remote-server-port", 2552)
val sessionTimeout = Duration(config.getInt("akka.cluster.session-timeout", 60), TIME_UNIT).toMillis.toInt
val metricsRefreshInterval = Duration(config.getInt("akka.cluster.metrics-refresh-timeout", 2), TIME_UNIT)
val connectionTimeout = Duration(config.getInt("akka.cluster.connection-timeout", 60), TIME_UNIT).toMillis.toInt
val maxTimeToWaitUntilConnected = Duration(config.getInt("akka.cluster.max-time-to-wait-until-connected", 30), TIME_UNIT).toMillis.toInt
val shouldCompressData = config.getBool("akka.cluster.use-compression", false)
@ -304,6 +307,8 @@ class DefaultClusterNode private[akka] (
lazy val remoteServerAddress: InetSocketAddress = remoteService.address
lazy val metricsManager: NodeMetricsManager = new LocalNodeMetricsManager(zkClient, Cluster.metricsRefreshInterval).start()
// static nodes
val CLUSTER_PATH = "/" + nodeAddress.clusterName
val MEMBERSHIP_PATH = CLUSTER_PATH + "/members"
@ -314,6 +319,7 @@ class DefaultClusterNode private[akka] (
val ACTOR_UUID_REGISTRY_PATH = CLUSTER_PATH + "/actor-uuid-registry"
val ACTOR_ADDRESS_TO_UUIDS_PATH = CLUSTER_PATH + "/actor-address-to-uuids"
val NODE_TO_ACTOR_UUIDS_PATH = CLUSTER_PATH + "/node-to-actors-uuids"
val NODE_METRICS = CLUSTER_PATH + "/metrics"
val basePaths = List(
CLUSTER_PATH,
@ -324,7 +330,8 @@ class DefaultClusterNode private[akka] (
NODE_TO_ACTOR_UUIDS_PATH,
ACTOR_ADDRESS_TO_UUIDS_PATH,
CONFIGURATION_PATH,
PROVISIONING_PATH)
PROVISIONING_PATH,
NODE_METRICS)
val LEADER_ELECTION_PATH = CLUSTER_PATH + "/leader" // should NOT be part of 'basePaths' only used by 'leaderLock'
@ -1641,7 +1648,11 @@ class MembershipChildListener(self: ClusterNode) extends IZkChildListener with E
// publish NodeConnected and NodeDisconnect events to the listeners
newlyConnectedMembershipNodes foreach (node ⇒ self.publish(NodeConnected(node)))
newlyDisconnectedMembershipNodes foreach (node ⇒ self.publish(NodeDisconnected(node)))
newlyDisconnectedMembershipNodes foreach { node ⇒
self.publish(NodeDisconnected(node))
// remove metrics of a disconnected node from ZK and local cache
self.metricsManager.removeNodeMetrics(node)
}
}
}
}