AppProps

The library for handling the application properties that are stored externally or/and internally in the project or/and set as environment variables

You can use different sources to config your application

• Environmental variables
• Properties files (usually .properties)
• Files in JSON format

Files can be stored anywhere

• Resource folder of your project
• User Home folder
• Any custom location on your computer
• Somewhere in the network

How to add configs

To add a config file to your appProp you need pass a Resource file; with one of methods

• addProperties(Source file)
• addJsonProperty(Source file, String name, Class clazz)
• addJsonPropertyAsList(Source file, String name, Class<T[]> clazz)

Examples

AppProps appProps = new AppProps()
                        .addProperties(new UserHomeFile("my-test.properties"))
                        .addProperties(new ResourceFile("my-app.properties"))
                        .addJsonProperty(new ResourceFile("test-users.json"), "testUser", User.class)
                        .addJsonPropertyAsList(new ResourceFile("test-cards.json"), "testCards", Card[].class)
                        .addYamlProperty(new ResourceFile("test-address.yml"), "shippingAddress", ShippingAddress.class)
                        .addYamlPropertyAsList(new ResourceFile("test-order-lines.yml"), "orderLines", OrderLine.class);

All environmental variables will be added automatically.
All configs will be read in the order that they were added to AppProps.

How to access property values

String dbPassword = appProps.value("password");
User testUser = appProp.valueAs("testUser", User.class);
ShippingAddress shippingAddress = (ShippingAddress) appProp.valueObject("shippingAddress", ShippingAddress.class);
List<Card> testCards = appProps.valueAsListOf("testCards", Card[].class);
List<OrderLine> orderLines = appProps.valueAsListOf("orderLines", OrderLine[].class);

List of objects YAML example

public class TestObject {

    private String value;

    public String getValue() {
        return value;
    }

    public void setValue(String value) {
        this.value = value;
    }
}

"value": "value 1"
---
"value": "value 2"