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
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
/*
* =========================================================================================
* Copyright © 2013 the kamon project <http://kamon.io/>
*
* 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 spray.can.client
import org.aspectj.lang.annotation._
import org.aspectj.lang.ProceedingJoinPoint
import spray.http.{ HttpHeader, HttpResponse, HttpMessageEnd, HttpRequest }
import spray.http.HttpHeaders.RawHeader
import kamon.trace._
import kamon.Kamon
import kamon.spray.{ ClientSegmentCollectionStrategy, Spray }
import akka.actor.ActorRef
import scala.concurrent.{ Future, ExecutionContext }
import akka.util.Timeout
@Aspect
class ClientRequestInstrumentation {
@DeclareMixin("spray.can.client.HttpHostConnector.RequestContext")
def mixin: SegmentAware = SegmentAware.default
@Pointcut("execution(spray.can.client.HttpHostConnector.RequestContext.new(..)) && this(requestContext) && args(request, *, *, *)")
def requestContextCreation(requestContext: SegmentAware, request: HttpRequest): Unit = {}
@After("requestContextCreation(requestContext, request)")
def afterRequestContextCreation(requestContext: SegmentAware, request: HttpRequest): Unit = {
// The RequestContext will be copied when a request needs to be retried but we are only interested in creating the
// segment the first time we create one.
// The read to ctx.segmentCompletionHandle should take care of initializing the aspect timely.
if (requestContext.segment.isEmpty) {
TraceRecorder.currentContext match {
case ctx: DefaultTraceContext ⇒
val sprayExtension = Kamon(Spray)(ctx.system)
if (sprayExtension.clientSegmentCollectionStrategy == ClientSegmentCollectionStrategy.Internal) {
val clientRequestName = sprayExtension.assignHttpClientRequestName(request)
val segment = ctx.startSegment(clientRequestName, SegmentMetricIdentityLabel.HttpClient)
requestContext.segment = segment
}
case EmptyTraceContext ⇒ // Nothing to do here.
}
}
}
@Pointcut("execution(* spray.can.client.HttpHostConnector.RequestContext.copy(..)) && this(old)")
def copyingRequestContext(old: SegmentAware): Unit = {}
@Around("copyingRequestContext(old)")
def aroundCopyingRequestContext(pjp: ProceedingJoinPoint, old: SegmentAware): Any = {
TraceRecorder.withInlineTraceContextReplacement(old.traceContext) {
pjp.proceed()
}
}
@Pointcut("execution(* spray.can.client.HttpHostConnectionSlot.dispatchToCommander(..)) && args(requestContext, message)")
def dispatchToCommander(requestContext: SegmentAware, message: Any): Unit = {}
@Around("dispatchToCommander(requestContext, message)")
def aroundDispatchToCommander(pjp: ProceedingJoinPoint, requestContext: SegmentAware, message: Any) = {
if (requestContext.traceContext.nonEmpty) {
TraceRecorder.withInlineTraceContextReplacement(requestContext.traceContext) {
if (message.isInstanceOf[HttpMessageEnd])
requestContext.segment.finish()
pjp.proceed()
}
} else pjp.proceed()
}
@Pointcut("execution(* spray.client.pipelining$.sendReceive(akka.actor.ActorRef, *, *)) && args(transport, ec, timeout)")
def requestLevelApiSendReceive(transport: ActorRef, ec: ExecutionContext, timeout: Timeout): Unit = {}
@Around("requestLevelApiSendReceive(transport, ec, timeout)")
def aroundRequestLevelApiSendReceive(pjp: ProceedingJoinPoint, transport: ActorRef, ec: ExecutionContext, timeout: Timeout): Any = {
val originalSendReceive = pjp.proceed().asInstanceOf[HttpRequest ⇒ Future[HttpResponse]]
(request: HttpRequest) ⇒ {
val responseFuture = originalSendReceive.apply(request)
TraceRecorder.currentContext match {
case ctx: DefaultTraceContext ⇒
val sprayExtension = Kamon(Spray)(ctx.system)
if (sprayExtension.clientSegmentCollectionStrategy == ClientSegmentCollectionStrategy.Pipelining) {
val clientRequestName = sprayExtension.assignHttpClientRequestName(request)
val segment = ctx.startSegment(clientRequestName, SegmentMetricIdentityLabel.HttpClient)
responseFuture.onComplete { result ⇒
segment.finish()
}(ec)
}
case EmptyTraceContext ⇒ // Nothing to do here.
}
responseFuture
}
}
@Pointcut("call(* spray.http.HttpMessage.withDefaultHeaders(*)) && within(spray.can.client.HttpHostConnector) && args(defaultHeaders)")
def includingDefaultHeadersAtHttpHostConnector(defaultHeaders: List[HttpHeader]): Unit = {}
@Around("includingDefaultHeadersAtHttpHostConnector(defaultHeaders)")
def aroundIncludingDefaultHeadersAtHttpHostConnector(pjp: ProceedingJoinPoint, defaultHeaders: List[HttpHeader]): Any = {
val modifiedHeaders = TraceRecorder.currentContext match {
case ctx: DefaultTraceContext ⇒
val sprayExtension = Kamon(Spray)(ctx.system)
if (sprayExtension.includeTraceToken)
RawHeader(sprayExtension.traceTokenHeaderName, ctx.token) :: defaultHeaders
else
defaultHeaders
case EmptyTraceContext ⇒ defaultHeaders
}
pjp.proceed(Array(modifiedHeaders))
}
}
|
