TcPaulyue/mongodb-cluster-docker-compose

Set up mongodb cluster

Step 1: start the mongo databases
```
docker-compose up -d
```
Step 2: exec into one of the mongos:
```
docker exec -it localmongo1 /bin/bash
```
Step 3: access mongo console
```
mongo
```

Step 4: configure replica set by pasting the following

rs.initiate({
  _id : 'rs0',
  members: [
    { _id : 0, host : "{YOUR_LOCAL_IP}:27011" },
    { _id : 1, host : "{YOUR_LOCAL_IP}:27012" },
    { _id : 2, host : "{YOUR_LOCAL_IP}:27013" }
  ]
})

Config cluster in Springboot application

Step1: application.properties

spring.data.mongodb.uri=mongodb://127.0.0.1:27011,127.0.0.1:27012,127.0.0.1:27013/test?replicaSet=rs0

Step2: add @EnableTransactionManagement & MongoTransactionManager

@EnableTransactionManagement
public class SddmArchiverApplication {

    public static void main(String[] args) {
        SpringApplication.run(SddmArchiverApplication.class, args);
    }

    @Bean
    MongoTransactionManager transactionManager(MongoDbFactory dbFactory){
        return new MongoTransactionManager(dbFactory);
    }
}

Step3: add @Transactional on your functions

    @Transactional(rollbackFor = ArithmeticException.class)
    public Document updateDocument(String id, String collectionName, JSONObject content) throws BadRequestException {
    					...
    }