├── doc └── intro.md ├── .gitignore ├── test └── clj_telemetry │ └── core_test.clj ├── project.clj ├── CHANGELOG.md ├── src └── telemetry │ ├── middleware.clj │ └── tracing.clj ├── README.md └── LICENSE /doc/intro.md: -------------------------------------------------------------------------------- 1 | # Introduction to clj-telemetry 2 | 3 | TODO: write [great documentation](http://jacobian.org/writing/what-to-write/) 4 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | /target 2 | /classes 3 | /checkouts 4 | profiles.clj 5 | pom.xml 6 | pom.xml.asc 7 | *.jar 8 | *.class 9 | /.lein-* 10 | /.nrepl-port 11 | .hgignore 12 | .hg/ 13 | -------------------------------------------------------------------------------- /test/clj_telemetry/core_test.clj: -------------------------------------------------------------------------------- 1 | (ns clj-telemetry.core-test 2 | (:require [clojure.test :refer :all] 3 | [clj-telemetry.core :refer :all])) 4 | 5 | (deftest a-test 6 | (testing "FIXME, I fail." 7 | (is (= 0 1)))) 8 | -------------------------------------------------------------------------------- /project.clj: -------------------------------------------------------------------------------- 1 | (defproject clj-telemetry "0.2.2" 2 | :description "A Clojure library designed to wrap OpenTelemetry Java API" 3 | :url "https://github.com/tendant/clj-telemetry" 4 | :license {:name "EPL-2.0 OR GPL-2.0-or-later WITH Classpath-exception-2.0" 5 | :url "https://www.eclipse.org/legal/epl-2.0/"} 6 | :dependencies [[org.clojure/clojure "1.10.0"] 7 | [io.opentelemetry/opentelemetry-api "0.13.1"] 8 | [io.opentelemetry/opentelemetry-sdk "0.13.1"] 9 | [io.opentelemetry/opentelemetry-exporter-jaeger "0.13.1"] 10 | [io.grpc/grpc-protobuf "1.34.1"] 11 | [io.grpc/grpc-netty-shaded "1.34.1"]] 12 | :repl-options {:init-ns telemetry.tracing}) 13 | -------------------------------------------------------------------------------- /CHANGELOG.md: -------------------------------------------------------------------------------- 1 | # Change Log 2 | All notable changes to this project will be documented in this file. This change log follows the conventions of [keepachangelog.com](http://keepachangelog.com/). 3 | 4 | ## [Unreleased] 5 | ### Changed 6 | - Add a new arity to `make-widget-async` to provide a different widget shape. 7 | 8 | ## [0.1.1] - 2020-05-22 9 | ### Changed 10 | - Documentation on how to make the widgets. 11 | 12 | ### Removed 13 | - `make-widget-sync` - we're all async, all the time. 14 | 15 | ### Fixed 16 | - Fixed widget maker to keep working when daylight savings switches over. 17 | 18 | ## 0.1.0 - 2020-05-22 19 | ### Added 20 | - Files from the new template. 21 | - Widget maker public API - `make-widget-sync`. 22 | 23 | [Unreleased]: https://github.com/your-name/clj-telemetry/compare/0.1.1...HEAD 24 | [0.1.1]: https://github.com/your-name/clj-telemetry/compare/0.1.0...0.1.1 25 | -------------------------------------------------------------------------------- /src/telemetry/middleware.clj: -------------------------------------------------------------------------------- 1 | (ns telemetry.middleware 2 | (:require [telemetry.tracing :as tracing] 3 | [clojure.string :as string])) 4 | 5 | (defn event-fn-skip-probe 6 | [req] 7 | (let [user-agent (get-in req [:headers "user-agent"])] 8 | (if (and user-agent 9 | (string/includes? user-agent "probe")) 10 | false 11 | true))) 12 | 13 | (defn wrap-telemetry-tracing 14 | ([handler] 15 | (wrap-telemetry-tracing handler nil)) 16 | ([handler options] 17 | (fn [req] 18 | (let [event-fn (:event-fn options event-fn-skip-probe)] 19 | (if (and event-fn 20 | (event-fn req) 21 | (:tracer options)) 22 | (let [span (tracing/create-span (:tracer options) (:span-name options "wrap-telemetry-tracing")) 23 | method (:request-method req) 24 | uri (:uri req) 25 | msg (format "HTTP %s %s Begin" (string/upper-case (name method)) uri)] 26 | (try 27 | (tracing/add-event span msg) 28 | (handler (assoc req :span span)) 29 | (finally 30 | (tracing/end-span span)))) 31 | (handler req)))))) -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # clj-telemetry 2 | 3 | A Clojure library designed to wrap [OpenTelemetry Java API](https://github.com/open-telemetry/opentelemetry-java). 4 | 5 | ## Usage 6 | 7 | ```clj 8 | [clj-telemetry "0.2.2"] 9 | ``` 10 | 11 | 1. Setup tracer 12 | 13 | ``` 14 | (def exporter (build-exporter-jaeger "test-service-name" "localhost" "14250")) 15 | (def span-processor (build-simple-span-processor exporter)) 16 | (def open-telemetry (init-open-telemetry exporter)) 17 | (def tracer (get-tracer open-telemetry "test.tracing")) 18 | ``` 19 | 20 | 2. Create span 21 | 22 | ``` 23 | (import [telemetry.tracing :as tracing]) 24 | 25 | (def span-1 (tracing/create-span tracer)) 26 | 27 | (tracing/add-event span-1 "1. first event") 28 | (tracing/add-event span-1 "1. second event") 29 | 30 | (tracing/end-span span-1) 31 | ``` 32 | 33 | 34 | 35 | ## References 36 | 37 | https://github.com/open-telemetry/opentelemetry-java/blob/master/QUICKSTART.md 38 | 39 | Tracing: 40 | 41 | https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/trace/api.md#obtaining-a-tracer 42 | 43 | API Doc: 44 | https://javadoc.io/doc/io.opentelemetry/opentelemetry-api/latest/index.html 45 | 46 | Jaeger example: 47 | https://github.com/open-telemetry/opentelemetry-java/tree/master/examples/jaeger 48 | 49 | ## License 50 | 51 | Copyright © 2020 FIXME 52 | 53 | This program and the accompanying materials are made available under the 54 | terms of the Eclipse Public License 2.0 which is available at 55 | http://www.eclipse.org/legal/epl-2.0. 56 | 57 | This Source Code may also be made available under the following Secondary 58 | Licenses when the conditions for such availability set forth in the Eclipse 59 | Public License, v. 2.0 are satisfied: GNU General Public License as published by 60 | the Free Software Foundation, either version 2 of the License, or (at your 61 | option) any later version, with the GNU Classpath Exception which is available 62 | at https://www.gnu.org/software/classpath/license.html. 63 | -------------------------------------------------------------------------------- /src/telemetry/tracing.clj: -------------------------------------------------------------------------------- 1 | (ns telemetry.tracing 2 | (:require [clojure.walk :as walk]) 3 | (:import [io.opentelemetry.sdk.trace SdkTracerProvider] 4 | [io.opentelemetry.api OpenTelemetry] 5 | [io.opentelemetry.sdk OpenTelemetrySdk] 6 | [io.opentelemetry.context.propagation ContextPropagators] 7 | [io.opentelemetry.api.trace.propagation W3CTraceContextPropagator] 8 | [io.opentelemetry.sdk.trace.export BatchSpanProcessor SimpleSpanProcessor] 9 | [io.grpc ManagedChannelBuilder] 10 | [io.opentelemetry.exporter.jaeger JaegerGrpcSpanExporter] 11 | [io.opentelemetry.context Context] 12 | [io.opentelemetry.api.common Attributes])) 13 | 14 | (defn build-exporter-jaeger 15 | [service-name ip port] 16 | (let [port (Integer. port) 17 | channel (-> (ManagedChannelBuilder/forAddress ip port) 18 | (.usePlaintext) 19 | (.build)) 20 | exporter (-> (JaegerGrpcSpanExporter/builder) 21 | (.setServiceName service-name) 22 | (.setChannel channel) 23 | (.setDeadlineMs 30000) 24 | (.build))] 25 | exporter)) 26 | 27 | (defn build-batch-span-processor 28 | [exporter] 29 | (-> (BatchSpanProcessor/builder exporter) 30 | .build)) 31 | 32 | (defn build-simple-span-processor 33 | [exporter] 34 | (-> (SimpleSpanProcessor/builder exporter) 35 | .build)) 36 | 37 | (defn init-open-telemetry 38 | [span-processor] 39 | (let [open-telemetry (.build (OpenTelemetrySdk/builder))] 40 | (-> open-telemetry 41 | .getTracerManagement 42 | (.addSpanProcessor span-processor)) 43 | open-telemetry)) 44 | 45 | (defn shutdown-open-telemetry 46 | [open-telemetry] 47 | (-> (.getTraceManagement open-telemetry) 48 | (.shutdown))) 49 | 50 | (defn get-tracer 51 | [open-telemetry library-name] 52 | (if open-telemetry 53 | (.getTracer open-telemetry (or library-name "telemetry.tracing")))) 54 | 55 | (defn create-span 56 | ([tracer id] 57 | (create-span tracer id nil)) 58 | ([tracer id parent] 59 | (if tracer 60 | (let [span (if parent 61 | (.setParent (.spanBuilder tracer id) 62 | (.with (Context/current) parent)) 63 | (.spanBuilder tracer id))] 64 | (.startSpan span))))) 65 | 66 | (defn end-span 67 | [span] 68 | (if span 69 | (.end span))) 70 | 71 | (defn span-attributes 72 | [span attributes] 73 | (if span 74 | (doseq [[k v] attributes] 75 | (.setAttribute span (str k) (str v))))) 76 | 77 | (defn attrs [m] 78 | (let [builder (Attributes/builder)] 79 | (doseq [[k v] m] 80 | (.put builder (str k) (str v))) 81 | (.build builder))) 82 | 83 | (defn add-event 84 | ([span message] 85 | (add-event span message nil)) 86 | ([span message m] 87 | (if span 88 | (if (and m 89 | (not (empty? m))) 90 | (.addEvent span message (attrs m)) 91 | (.addEvent span message))))) 92 | 93 | (comment 94 | (def exporter (build-exporter-jaeger "test-service-name" "localhost" "14250")) 95 | (def span-processor (build-simple-span-processor exporter)) 96 | (def open-telemetry (init-open-telemetry exporter)) 97 | (def tracer (get-tracer open-telemetry "test.tracing")) 98 | ) 99 | 100 | (defn test-span 101 | [tracer] 102 | (let [span1 (create-span tracer "span-1")] 103 | (add-event span1 "1. first event") 104 | (add-event span1 "1. second event") 105 | (let [span2 (create-span tracer "span-2")] 106 | (add-event span2 "span 2. first event") 107 | (add-event span2 "span 2. second event" {"attr1" "attr1 value" 108 | "attr2" "attr2 value2"}) 109 | (.end span2)) 110 | (.end span1))) 111 | 112 | (defn test-parent-span 113 | [tracer] 114 | (let [root (create-span tracer "test-parent-span")] 115 | (add-event root "root event") 116 | (let [child (create-span tracer "test-parent-span child" root)] 117 | (add-event child "child span") 118 | (add-event root "root span with child") 119 | (.end child) 120 | (add-event child "child span after end child")) 121 | (add-event root "root span after child") 122 | (add-event root "root span after end root") 123 | (.end root))) 124 | 125 | (defn test-parallel-spans 126 | [tracer] 127 | (let [span-1 (create-span tracer "test-parallel-1") 128 | span-2 (create-span tracer "test-parallel-2")] 129 | (add-event span-1 "begin") 130 | (add-event span-2 "event: a") 131 | (Thread/sleep 1000) 132 | (add-event span-1 "event: b") 133 | (Thread/sleep 1000) 134 | (add-event span-2 "event: c") 135 | (Thread/sleep 1000) 136 | (add-event span-1 "event: d") 137 | (Thread/sleep 1000) 138 | (add-event span-2 "event: e") 139 | (Thread/sleep 1000) 140 | (add-event span-1 "event: f") 141 | (add-event span-2 "span: after end span") 142 | (.end span-1) 143 | (.end span-2))) -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Eclipse Public License - v 2.0 2 | 3 | THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE 4 | PUBLIC LICENSE ("AGREEMENT"). 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