Use AWS X-Ray in Lambda

Identify performance bottlenecks

Jargons

Configuration

1. Maven

<dependency>
    <groupId>com.amazonaws</groupId>
    <artifactId>aws-xray-recorder-sdk-core</artifactId>
    <version>1.2.1</version>
</depe

2. Handle an exception from XRAY class

  1. do export AWS_XRAY_CONTEXT_MISSING=LOG_ERROR in your terminal to fix your failing integration test

  2. in buildspec.yml, fix for your CI/CD pipe line

     env:
       variables:
         AWS_XRAY_CONTEXT_MISSING: "LOG_ERROR"
    

3. TracingEnabled

Resources:
  HelloWorldAPI:
    Type: AWS::Serverless::Api
    Properties:
      StageName: v1
      TracingEnabled: true
Resources:
  HelloWorldAPIService:
    Type: 'AWS::Serverless::Function'
    Properties:
      Timeout: 900
      Environment:
        Variables:
          PARAM_NAME_DB_HOST: "awsdb.com"
          PARAM_NAME_DB_USER: "postgres"
          PARAM_NAME_DB_PASS: "password"
          PARAM_NAME_DB_PORT: "5432"
          AWS_XRAY_CONTEXT_MISSING: LOG_ERROR

Add Segment

public void myMethod(){

  AWSXRay.beginSubsegment("fetching user");
  User user = userService.getUser(userId);
  AWSXRay.endSubsegment();

  AWSXRay.beginSubsegment("fetching configs");
  Config config = configService.getConfigs(userId);
  AWSXRay.endSubsegment();
}

X-Ray vs RayGun

// todo

References