Setup

In this section we’re going to spin up the services needed for the workshop.

Service

The web service is a simple dropwizard server, which has a single API to search for talks from kcdc.info, and returns results about these talks.

Running

Prerequisites:

• Maven
• Java JDK

Assemble the service:

mvn clean package

💡 If you have issues with building it locally due to your setup, you can download the server assembly here.

Start the workshop service:

java -jar java-perf-workshop-server/target/java-perf-workshop-server-1.1.0-SNAPSHOT.jar server server.yml

Mocking Service Dependency

To simulate responses of kcdc.info (as the service may change over time), we will first run a mock instance of this service using WireMock.

Go ahead and start another terminal session where we will run another service to mock a remote dependency of the workshop service. Navigate to the same directory where you cloned this repository, then execute the following commands:

mvn dependency:copy -Dartifact=com.github.tomakehurst:wiremock-standalone:2.24.1 -Dmdep.stripVersion=true -DoutputDirectory=.

Run the mock service, which will provide the essential end-points to support the service we will be testing:

java -jar wiremock-standalone.jar --port 9090 --root-dir java-perf-workshop-server/src/test/resources

Alternatively, you can run the mockservice.sh script which will do both commands, ie: sh mockservice.sh

Configuration

Example configuration of service:

server:
  applicationConnectors:
    - type: http
      port: 80
  adminConnectors:
    - type: http
      port: 8071
  requestLog:
    timeZone: UTC
    appenders:
      - type: file
        currentLogFilename: /var/log/java-perf-workshop-server-access.log
        threshold: ALL
        archive: true
        archivedLogFilenamePattern: /var/log/java-perf-workshop-server-access.%d.log.gz
        archivedFileCount: 5
logging:
  level: INFO
  appenders:
    - type: file
      currentLogFilename: /var/log/java-perf-workshop-server.log
      threshold: ALL
      archive: true
      archivedLogFilenamePattern: /var/log/java-perf-workshop-server-%d.log
      archivedFileCount: 5
      timeZone: UTC

Testing

The service will return back results from the KCDC website on sessions that are available which contain a substring in their title, abstract, or tags. Example:

http://localhost:8080/search?q=clojure

Example results:

{
  "results" : [ {
    "title" : "Concurrency Options on the JVM",
    "presenter" : "Jessica Kerr"
  }, {
    "title" : "Fast, Parallel, or Reliable: Pick 3, a tour of Elixir",
    "presenter" : "Jordan Day"
  } ]
}

Troubleshooting

If you get a 500 error message when trying to test the service, verify that the wiremock server is running.

{
  "code" : 500,
  "message" : "There was an error processing your request. It has been logged (ID d8998189f8d4ee8c)."
}

Reference

• KCDC 2015 workshop slides