thrinath500/account-manager

Account manager

Description : Rest Service to manage transfers currency across accounts

Code modules:

account-dao : Dao layer which holds the details of the Accounts and their balances account-model : Encompasses the Request, Response and Core Entities service : Dropwizard rest service for exposing APIs

1. RequestId passed in header for all POST requests. Internally stores this variable in ThreadLocal maintaining Idempotency acroos same requests [RequestContainer.class]
2. Reentrant lock is used for handling critical sections in concurrent scenarios [Account.class]

Libraries used

1. Dropwizard - For REST
2. Guice - Dependency Injection
3. Guava - Collection utilties
4. Lombok - Auto generate code
5. Junit - Test cases. Intentionally not used Mockito & PowerMockito Frameworks, to keep it lightweight

Build steps:

Maven project. Uses dependency management to maintain the same versions across all child modules Whole project is bundled into one single jar using shade plugin JDK version is 1.8

git clone git@github.com:thrinath500/account-manager.git
cd account-manager
mvn clean install

Run steps:

sudo mkdir -pm 775 /tmp/com/revolut/accountmanager/
java -cp service/target/service-1.0-SNAPSHOT.jar com.revolut.accountmanager.AccountManagerService server service/service.yml

Tests

Service starts up with default test data. However you can load your test data again

1. Registering a account

curl -w"\n" -iX PUT \
  http://localhost:9000/v1/account/ \
  -H 'content-type: application/json' \
  -d '{"firstName" : "Thrinath2","lastName":"Dosapati2","address" : "Banglore"}'

2. Depositing to an account

curl -w"\n" -iX POST \
  http://localhost:9000/v1/account/1/deposit \
  -H 'content-type: application/json' \
  -H 'x-request-id: 123' \
  -d '{"currencyType" : "INR", "value" : 10000}'

3. Viewing an account

curl -w"\n" -iX GET http://localhost:9000/v1/account/1 \
  -H 'content-type: application/json' 

4. Withdrawing from an account

curl -w"\n" -iX POST \
  http://localhost:9000/v1/account/1/withdraw \
  -H 'x-request-id: abc-pqr' \
  -H 'content-type: application/json' \
  -d '{"currencyType" : "INR", "value" : 1000}'

5. Transferring to other account

curl -w"\n" -iX POST \
  http://localhost:9000/v1/transaction/transfer \
  -H 'content-type: application/json' \
  -H 'x-request-id: abc-pqr-xyz' \
  -d '{"currencyType" : "INR", "value" : 600, "fromAccountId" : 2, "toAccountId" : 1}'

6. Viewing account Statment

curl -w"\n" -iX GET \
  http://localhost:9000/v1/account/1/statement \
  -H 'content-type: application/json'