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cordacon

This CordApp caches a file using a Corda Service which contains the list of names of parties to which some data needs to be sent. In our case the data is just a simple hello

The Flow then loads the cached file sends data or 'Hello' in our case to parties mentioned in the file.

Step 1: From the Project DIR

do a gradle deployNodes to create the nodes.

Step 2: From the Project DIR

Do a gradle createServer to create the BootJar in demo-server project.

Step 3: Start the Nodes

Navigate inside ./build/node/ and runnodes to start the node

Step 4: Start the WebServer

Navigate inside ./build/node/ and runserver to start the servers

Related Info

PartyA is listening on localhost:8080, PartyB is listenting on localhost:8081, and PartyC is listening on localhost:8082.

Only PartyA has privilege to run the service. demo-service cordapp is deployed on PartyA only. In build/node/PartyA/ you will find 2 folders. Cache and Response: Cache is the CacheDir where the okHttp Cache is saved. Response is the Folder where the partyList.txt file gets saved.

Ethereal Service is responsible to get the List of Parties from the outside out. To which Hello should be sent.

Downloads file from link: https://raw.githubusercontent.com/kid101/cordacon/master/sayhelloto Location can be changed to point to some other location.

After downloading the file. Flow Loads it and sends hello to parties mentioned in the file.

API

  • demo/hello to test the server is working
  • demo/me to get the node's identity
  • demo/sayHelloTo to send hello to the parties mentioned in the partyList.txt
  • demo/getAllHello/{pageNumber} to view all the hello's

Common Issues:

If facing access issues to jar or shell script or log file: chmod to give appropriate permissions.

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Sample CordApp in Java with BootJar

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