SSCS Case Loader Application

Purpose

The purpose of this App is to take cases coming from the legacy Gaps2 and create/update them in the CCD app.

What's inside

It contains:

• common plugins and libraries
• docker setup
• swagger configuration for api documentation (see how to publish your api documentation to shared repository)
• code quality tools already set up
• integration with Travis CI
• Hystrix circuit breaker enabled
• Hystrix dashboard
• MIT license and contribution information

The application exposes health endpoint (http://localhost:8082/health) and metrics endpoint (http://localhost:8082/metrics).

Plugins

The project contains the following plugins:

• checkstyle

  https://docs.gradle.org/current/userguide/checkstyle_plugin.html

  Performs code style checks on Java source files using Checkstyle and generates reports from these checks. The checks are included in gradle's check task (you can run them by executing ./gradlew check command).

• pmd

  https://docs.gradle.org/current/userguide/pmd_plugin.html

  Performs static code analysis to finds common programming flaws. Incuded in gradle check task.

• jacoco

  https://docs.gradle.org/current/userguide/jacoco_plugin.html

  Provides code coverage metrics for Java code via integration with JaCoCo. You can create the report by running the following command:

    ./gradlew jacocoTestReport

  The report will be created in build/reports subdirectory in your project directory.

• io.spring.dependency-management

  https://github.com/spring-gradle-plugins/dependency-management-plugin

  Provides Maven-like dependency management. Allows you to declare dependency management using dependency 'groupId:artifactId:version' or dependency group:'group', name:'name', version:version'.

• org.springframework.boot

  http://projects.spring.io/spring-boot/

  Reduces the amount of work needed to create a Spring application

• org.owasp.dependencycheck

  https://jeremylong.github.io/DependencyCheck/dependency-check-gradle/index.html

  Provides monitoring of the project's dependent libraries and creating a report of known vulnerable components that are included in the build. To run it execute gradle dependencyCheck command.

• com.github.ben-manes.versions

  https://github.com/ben-manes/gradle-versions-plugin

  Provides a task to determine which dependencies have updates. Usage:

    ./gradlew dependencyUpdates -Drevision=release

Building and deploying the application

Building the application

The project uses Gradle as a build tool. It already contains ./gradlew wrapper script, so there's no need to install gradle.

To build the project execute the following command:

  ./gradlew build

Running the application

Run the application by executing:

  ./gradlew bootRun

Running the application in Docker

Dockerisation is a work in progress.

Setting up a Dockerised SFTP server for developing purpose

This setup is required if files need to be processed via sftp server

• To simply build the SFTP server

docker-compose rm -f && docker-compose -f docker-compose-sftp.yml build && docker-compose -f docker-compose-sftp.yml up

• To login into a container which is currently running on your system and view transferred files

Place file to be transferred under docker/sftp/data/incoming then:

To connect into sftp container from sscs-case-loader container use:
```bash
sftp -P 22 -o StrictHostKeyChecking=no -i /home/webapp/sscs-sftp-key sftp@sscs-sftp:incoming

To connect into sftp container from host (your computer): Before first use

chmod 600 ./docker/sftp-docker

and put some files in here

./docker/sftp/data/incoming/

finally

sftp -P 2222 -o StrictHostKeyChecking=no -i ./docker/sftp-docker sftp@localhost:incoming

Connected to sscs-sftp.
Changing to: /incoming
sftp> dir
SSCS_Extract_Reference_2017-06-30-09-01-31.xml

Running e2e locally

• Bring up the upstream systems using sscs-docker (https://github.com/hmcts/sscs-docker) project. Please follow the instructions given in the README document.

• Run the application using the "local" profile:

SPRING_PROFILES_ACTIVE=local ./gradlew bootRun

• Turn on debugging by editing sscs-case-loader/src/main/resources/application.yaml

logging.level:
    org.springframework.web: ${LOG_LEVEL_SPRING_WEB:debug}
    uk.gov.hmcts.reform.sscs: ${LOG_LEVEL_SSCS:debug}

• Bring up the SFTP server

docker-compose rm -f && docker-compose -f docker-compose-sftp.yml build && docker-compose -f docker-compose-sftp.yml up

• Open IntelliJ and import the Lombok plugin and enable annotation processing
• Run this test within IntelliJ

https://github.com/hmcts/sscs-case-loader/blob/master/src/e2e/java/uk.gov.hmcts.reform.sscs/olde2e/ProcessFileAndSaveIntoCcd.java#L20

• Refresh the browser to view the cases in CCD

http://localhost:3451

• Running Functional test locally

1. Make sure you bring up local SFTP and run sscs-docker dependencies
2. Run

 SPRING_PROFILES_ACTIVE=local ./gradlew functionalPreDeploy
 SPRING_PROFILES_ACTIVE=local ./gradlew bootRun
 SPRING_PROFILES_ACTIVE=local ./gradlew functionalPostDeploy

Hystrix

Hystrix is a library that helps you control the interactions between your application and other services by adding latency tolerance and fault tolerance logic. It does this by isolating points of access between the services, stopping cascading failures across them, and providing fallback options. We recommend you to use Hystrix in your application if it calls any services.

Hystrix circuit breaker

This template API has Hystrix Circuit Breaker already enabled. It monitors and manages all the@HystrixCommand or HystrixObservableCommand annotated methods inside @Component or @Service annotated classes.

Hystrix dashboard

When this API is running, you can monitor Hystrix metrics in real time using Hystrix Dashboard. In order to do this, visit http://localhost:4550/hystrix and provide http://localhost:4550/hystrix.stream as the Hystrix event stream URL. Keep in mind that you'll only see data once some of your Hystrix commands have been executed. Otherwise 'Loading...' message will be displayed on the monitoring page.

Other

Hystrix offers much more than Circuit Breaker pattern implementation or command monitoring. Here are some other functionalities it provides:

• Separate, per-dependency thread pools
• Semaphores, which you can use to limit the number of concurrent calls to any given dependency
• Request caching, allowing different code paths to execute Hystrix Commands without worrying about duplicating work

Troubleshooting

IDE Settings

Project Lombok Plugin

When building the project in your IDE (eclipse or IntelliJ), Lombok plugin will be required to compile.

For IntelliJ IDEA, please add the Lombok IntelliJ plugin:

• Go to File > Settings > Plugins
• Click on Browse repositories...
• Search for Lombok Plugin
• Click on Install plugin
• Restart IntelliJ IDEA

Plugin setup for other IDE's are available on [https://projectlombok.org/setup/overview]

License

This project is licensed under the MIT License - see the LICENSE file for details