blob: 825344b3bb534ca0b6334e2599876d930079f8fd (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
/*
* 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 org.apache.spark.deploy.master
import org.apache.spark.Logging
import org.apache.zookeeper._
import akka.serialization.Serialization
class ZooKeeperPersistenceEngine(serialization: Serialization)
extends PersistenceEngine
with SparkZooKeeperWatcher
with Logging
{
val WORKING_DIR = System.getProperty("spark.deploy.zookeeper.dir", "/spark") + "/master_status"
val zk = new SparkZooKeeperSession(this)
zk.connect()
override def zkSessionCreated() {
zk.mkdirRecursive(WORKING_DIR)
}
override def zkDown() {
logError("PersistenceEngine disconnected from ZooKeeper -- ZK looks down.")
}
override def addApplication(app: ApplicationInfo) {
serializeIntoFile(WORKING_DIR + "/app_" + app.id, app)
}
override def removeApplication(app: ApplicationInfo) {
zk.delete(WORKING_DIR + "/app_" + app.id)
}
override def addWorker(worker: WorkerInfo) {
serializeIntoFile(WORKING_DIR + "/worker_" + worker.id, worker)
}
override def removeWorker(worker: WorkerInfo) {
zk.delete(WORKING_DIR + "/worker_" + worker.id)
}
override def close() {
zk.close()
}
override def readPersistedData(): (Seq[ApplicationInfo], Seq[WorkerInfo]) = {
val sortedFiles = zk.getChildren(WORKING_DIR).toList.sorted
val appFiles = sortedFiles.filter(_.startsWith("app_"))
val apps = appFiles.map(deserializeFromFile[ApplicationInfo])
val workerFiles = sortedFiles.filter(_.startsWith("worker_"))
val workers = workerFiles.map(deserializeFromFile[WorkerInfo])
(apps, workers)
}
private def serializeIntoFile(path: String, value: AnyRef) {
val serializer = serialization.findSerializerFor(value)
val serialized = serializer.toBinary(value)
zk.create(path, serialized, CreateMode.PERSISTENT)
}
def deserializeFromFile[T](filename: String)(implicit m: Manifest[T]): T = {
val fileData = zk.getData("/spark/master_status/" + filename)
val clazz = m.runtimeClass.asInstanceOf[Class[T]]
val serializer = serialization.serializerFor(clazz)
serializer.fromBinary(fileData).asInstanceOf[T]
}
}
|
