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Microservice Template

This is simple example of configuring Seneca js microservices with express api and build integrated microservices communication network using Mesh (gossip protocol).

Microservices

There are three microservice :
Transaction Microservice : It create the transaction based on user provided data (using /transaction api)and send updated information to Orderer Microservices

Orderer Microservices : It create a batch or block and add its signature and send to commit Microservice.

Commit Microservice : It store the data into a file and send back response to Ordering Microserice and which in turn notify Transaction Microservice.

Base Microservice: It bootstrap the mesh network.

Interesting Thing to know

Mesh create a decentralise network of microservices which has capabilty to do auto discover without any help of central registry.

Pre requisite

This code has been tested with Ubuntu OS and node js version 8.x. Running this code on windows require installation of npm windows-build-tools package, python 2.7 and c++ build tool.

Bootstrapping Application

cd /msTemplate
npm install nodemon -g
npm i

Starting Microservices in a order

cd /webserver/microservices

Base Microservices :
cd /BaseMS
npm i
npm run start
npm run monitor

Transaction Microservices:

cd /TransactionMS
npm i
npm run start

Orderer Microservices :
cd /OrdereMS
npm i
npm run start

Commit Microservices :
cd /CommitMS
npm i
npm run start

Starting Server

Go into Root folder.
cd /msTemplate
npm run start

Create Transaction

call API using curl :
curl -d “param1=value1&param2=value2” -X POST http://localhost:3000/api/v1/transaction

Result

It create a ledger.json file inside /webserver/microservices/CommitMS, which is result of intercommunication of API to Transaction MS ( Microservices) -> Orderer MS ->Commit MS

UML diagrams

sequence diagram:

Transaction APITransaction MSOrdererCommitTransaction data {param1=value1&param2=value2}create Block using Tx dataStore data into ledger fileResult -> Operation SuccessResult -> Operation SuccessResult -> Operation SuccessTransaction APITransaction MSOrdererCommit