Hello Corda!

This repo is an short introduction to the two day Corda training course. The instructional powerpoint that goes along with this content can be found here: https://github.com/corda/hello-corda/blob/master/HelloCorda.pdf

This repository is currently only available in Java.

Instructions

Once you are all set up, you can start expanding on the class templates. In order to send custom messages using this CorDapp - You will first fix MessageState, then MessageFlow, and lastly MessageContract. There is a comment above each class that explains the change that needs to be done. For more details follow the intructional powerpoint "HelloCorda.pdf" within this git repository.

Running the tests

• Select Baseline Test - Java from the dropdown run configuration menu, and click the green play button.
• Individual tests can be run by clicking the green arrow in the line number column next to each test.
• When running flow tests you must add the following to your run / debug configuration in the VM options field. This enables us to use
• Quasar - a library that provides high-performance, lightweight threads.
• "-javaagent: /PATH_TO_FILE_FROM_ROOT_DIR/quasar.jar"

Template Files

Java

State:

• Template: java-source/src/main/java/net/corda/hello/MessageState.java
• Tests: java-source/src/test/java/net/corda/hello/state/MessageStateTests.java

Contract:

• Template: java-source/src/main/java/net/corda/hello/MessageContract.java
• Tests: java-source/src/test/java/net/corda/hello/contract/SendMessageTests.java

Flow:

• SendMessage template: java-source/src/main/java/net/corda/hello/MessageFlow.java
• SendMessage tests: java-source/src/test/java/net/corda/hello/flow/SendMessageFlowTests.java

Integration Test:

• HelloTests Test: java-source/src/test/java/net/corda/hello/HelloTests.java

Running the CorDapp

While the functionality will differ, this application can be run before and after making the changes described in the tutorial.

Java

• Terminal: Navigate to the root project folder and run ./gradlew clean java-source:deployNodes, followed by ./java-source/build/node/runnodes

Troubleshooting:

When running the flow tests, if you get a Quasar instrumention error then add:

-ea -javaagent:lib/quasar.jar

to the VM args property in the default run configuration for JUnit in IntelliJ.