Exporter/jaeger: Enforce strictNullChecks and noUnusedLocals (#382)

Author: mayurkale22

CHANGELOG.md

@@ -19,6 +19,7 @@ All notable changes to this project will be documented in this file.
 - Enforce `--strictNullChecks` and `--noUnusedLocals` Compiler Options on [opencensus-exporter-instana] package.
 - Add an API `globalStats.unregisterExporter()`.
 - Add support for overriding sampling for a span.
+- Enforce `--strictNullChecks` and `--noUnusedLocals` Compiler Options on [opencensus-exporter-jaeger] packages.
 
 ## 0.0.9 - 2019-02-12
 - Add Metrics API.

packages/opencensus-exporter-jaeger/README.md

@@ -1,21 +1,45 @@
-# OpenCensus Jaeger Exporter for Node.js
+# OpenCensus Jaeger Trace Exporter
 [![Gitter chat][gitter-image]][gitter-url]
 
-OpenCensus Jaeger Exporter allows the user to send collected traces with OpenCensus Node.js to Jaeger.
+OpenCensus Jaeger Trace Exporter allows the user to send collected traces with [OpenCensus Node.js](https://github.com/census-instrumentation/opencensus-node) to Jaeger.
+
+[Jaeger](https://jaeger.readthedocs.io/en/latest/), inspired by [Dapper](https://research.google.com/pubs/pub36356.html) and [OpenZipkin](http://zipkin.io/), is a distributed tracing system released as open source by [Uber Technologies](http://uber.github.io/). It is used for monitoring and troubleshooting microservices-based distributed systems, including:
+
+- Distributed context propagation
+- Distributed transaction monitoring
+- Root cause analysis
+- Service dependency analysis
+- Performance / latency optimization
 
 This project is still at an early stage of development. It's subject to change.
 
-## Installation
+## Quickstart
+
+### Prerequisites
+
+[Jaeger](https://jaeger.readthedocs.io/en/latest/) stores and queries traces exported by
+applications instrumented with Census. The easiest way to [start a Jaeger
+server](https://jaeger.readthedocs.io/en/latest/getting_started/) is to paste the below:
+
+```bash
+docker run -d \
+    -e COLLECTOR_ZIPKIN_HTTP_PORT=9411 \
+    -p5775:5775/udp -p6831:6831/udp -p6832:6832/udp \
+    -p5778:5778 -p16686:16686 -p14268:14268 -p9411:9411 \
+  jaegertracing/all-in-one:latest
+```
+
+### Installation
 
 Install OpenCensus Jaeger Exporter with:
 ```bash
 npm install @opencensus/nodejs
 npm install @opencensus/exporter-jaeger
 ```
 
-## Usage
+### Usage
 
-Instance the exporter on your application and pass the options, it must contain a service name and, optionaly, an URL. If no URL is passed, `http://localhost:9411/api/v2/spans` is used as default.
+Install the exporter on your application and pass the options, it must contain a service name and, optionaly, an URL. If no URL is passed, `http://127.0.0.1:14268/api/traces` is used as default.
 
 For ES6:
 

packages/opencensus-exporter-jaeger/src/jaeger-driver/index.ts

@@ -127,7 +127,6 @@ export function spanToThrift(span: Span): ThriftSpan {
     });
   }
 
-  const unsigned = true;
   const parentSpan: string|Buffer = span.parentSpanId ?
       Utils.encodeInt64(span.parentSpanId) :
       ThriftUtils.emptyBuffer;

packages/opencensus-exporter-jaeger/src/jaeger.ts

@@ -14,12 +14,14 @@
  * limitations under the License.
  */
 
-import {Exporter, ExporterBuffer, ExporterConfig, RootSpan, Span} from '@opencensus/core';
+import {Exporter, ExporterConfig, RootSpan, Span} from '@opencensus/core';
 import {logger, Logger} from '@opencensus/core';
 import * as os from 'os';
-
 import {spanToThrift, Tag, TagValue, ThriftProcess, ThriftUtils, UDPSender, Utils} from './jaeger-driver';
 
+const DEFAULT_BUFFER_FLUSH_INTERVAL_MILLIS = 1000;
+const DEFAULT_BUFFER_SIZE = 1000;
+
 /**
  * Options for Jaeger configuration
  */
@@ -53,17 +55,16 @@ export class JaegerTraceExporter implements Exporter {
   /** Timeout control */
   /** Max time for a buffer can wait before being sent */
   private bufferTimeout: number;
-  /** Manage when the buffer timeout needs to be reseted */
-  private resetTimeout = false;
   /** Indicates when the buffer timeout is running */
   private timeoutSet = false;
 
 
   constructor(options: JaegerTraceExporterOptions) {
     const pjson = require('../../package.json');
     this.logger = options.logger || logger.logger();
-    this.bufferTimeout = options.bufferTimeout;
-    this.bufferSize = options.bufferSize;
+    this.bufferTimeout =
+        options.bufferTimeout || DEFAULT_BUFFER_FLUSH_INTERVAL_MILLIS;
+    this.bufferSize = options.bufferSize || DEFAULT_BUFFER_SIZE;
     this.sender = new UDPSender(options);
     const tags: Tag[] = options.tags || [];
 

packages/opencensus-exporter-jaeger/test/test-jaeger.ts

@@ -14,14 +14,8 @@
  * limitations under the License.
  */
 
-import {CoreTracer, RootSpan, TracerConfig} from '@opencensus/core';
-import {logger, Logger} from '@opencensus/core';
+import {CoreTracer, logger} from '@opencensus/core';
 import * as assert from 'assert';
-import * as fs from 'fs';
-import * as mocha from 'mocha';
-import * as nock from 'nock';
-import * as shimmer from 'shimmer';
-
 import {JaegerTraceExporter, JaegerTraceExporterOptions} from '../src/';
 import {spanToThrift, ThriftUtils, UDPSender} from '../src/jaeger-driver';
 
@@ -36,9 +30,7 @@ import {SenderCallback} from '../src/jaeger-driver';
  * true to use a real zipkin service
  * false to use a nock server
  */
-const OPENCENSUS_NETWORK_TESTS =
-    ['true', 'TRUE', '1'].indexOf(process.env.OPENCENSUS_NETWORK_TESTS) > -1;
-
+const OPENCENSUS_NETWORK_TESTS = process.env.OPENCENSUS_NETWORK_TESTS;
 
 describe('Jaeger Exporter', () => {
   const testLogger = logger.logger('debug');
@@ -228,7 +220,8 @@ class MockedUDPSender extends UDPSender {
 
   // Holds the initialized process information. Name matches the associated
   // UDPSender property.
-  _process: ThriftProcess;
+  _process:
+      ThriftProcess = {serviceName: 'opencensus-exporter-jaeger', tags: []};
 
   setProcess(process: ThriftProcess): void {
     this._process = process;

packages/opencensus-exporter-jaeger/tsconfig.json

@@ -6,7 +6,8 @@
     "pretty": true,
     "module": "commonjs",
     "target": "es6",
-    "strictNullChecks": false
+    "strictNullChecks": true,
+    "noUnusedLocals": true
   },
   "exclude": [
     "node_modules"