/
DependencyTree.scala
47 lines (41 loc) · 1.74 KB
/
DependencyTree.scala
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
/*
* Copyright 2012 Twitter Inc.
*
* Licensed 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 com.twitter.zipkin.hadoop
import cascading.pipe.joiner._
import com.twitter.scalding._
import com.twitter.zipkin.gen.SpanServiceName
import com.twitter.zipkin.hadoop.sources._
/**
* Find out how often services call each other throughout the entire system
*/
class DependencyTree(args: Args) extends Job(args) with DefaultDateRangeJob {
val timeGranularity = TimeGranularity.Day
val spanInfo = PreprocessedSpanSource(timeGranularity)
.read
.filter(0) { s : SpanServiceName => s.isSetParent_id() }
.mapTo(0 -> ('id, 'parent_id, 'service))
{ s: SpanServiceName => (s.id, s.parent_id, s.service_name ) }
// TODO: account for possible differences between sent and received service names
val idName = PrepTsvSource(timeGranularity)
.read
/* Join with the original on parent ID to get the parent's service name */
val spanInfoWithParent = spanInfo
.joinWithSmaller('parent_id -> 'id_1, idName, joiner = new LeftJoin)
.map('name_1 -> 'name_1){ s: String => if (s == null) Util.UNKNOWN_SERVICE_NAME else s }
.groupBy('service, 'name_1){ _.size('count) }
.groupBy('service){ _.sortBy('count) }
.write(Tsv(args("output")))
}