https://github.com/zeevolution/transaction-authorizer
A Java Transaction Authorizer Application
https://github.com/zeevolution/transaction-authorizer
banking-applications banking-system java mvn
Last synced: 21 days ago
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A Java Transaction Authorizer Application
- Host: GitHub
- URL: https://github.com/zeevolution/transaction-authorizer
- Owner: zeevolution
- Created: 2021-03-14T04:59:10.000Z (over 5 years ago)
- Default Branch: main
- Last Pushed: 2022-12-27T18:06:27.000Z (over 3 years ago)
- Last Synced: 2026-06-07T21:25:50.012Z (21 days ago)
- Topics: banking-applications, banking-system, java, mvn
- Language: Java
- Homepage:
- Size: 2.45 MB
- Stars: 2
- Watchers: 1
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# `transaction-authorizer`: a java application for banking transaction authorization
This is a `java` application for authorizing banking transaction based on a set predefined rules.
The program receives `json` lines as inputs that are read from `operations` file at
"/src/main/java/resources/operations". As output, the program provides `json` lines for each given input
— imagine this as a stream of events arriving at an authorizer consumer.
## Local Setup
#### 1. Requirements
- Java (OpenJDK 15+) ([instruction](https://www.oracle.com/br/java/technologies/javase-downloads.html))
- Maven (3.6.3+) ([instructions](https://maven.apache.org/install.html))
- Your favorite IDE (the recommended one is [IntelliJ Community Edition](https://www.jetbrains.com/pt-br/idea/download/)).
#### 2. Build via terminal
In this project's root directory, run:
```bash
mvn clean install
```
#### 3. Run via terminal
`AuthorizerApplication` is the project's main file.
So, in order to run application, execute:
```bash
mvn exec:java -Dexec.mainClass=transaction.authorizer.AuthorizerApplication
```
The application reads all transaction inputs inside `"/src/main/java/resources/operations"`
, and produces a `output` file in the project's root directory.
If you want to test application against other transaction inputs, feel free to change
content inside `"/src/main/java/resources/operations"`, and re-run application.
#### 4. Run via Intellij
You may run the project by executing `AuthorizerApplication` via Intellij as follows:
## Application Architecture
Let's talk about the structure or architecture of the application.
The project has been separated into the following layers:
1. Main Application (AuthorizerApplication) starts application, and setups input and output files.
2. Consumers receive and handle transaction events.
3. Services process transaction events by applying a set of predefined rules, and producing an output for each event.
4. Models represent the domain that we're using within the application (e.g., `Account`, and `Transaction`).