In -depth exploring the technical principles of the Ciris framework

Ciris is a SCALA -based configuration library, which aims to simplify the application management of applications.It provides a safe, combined way to read and analyze the configuration information.This article will explore the technical principles of the Ciris framework and how to use the Java code example to illustrate. Ciris is mainly composed of the following core concepts: 1. Configvalue: It means a value in the configuration, which can be any type.Ciris provides a series of Type Class to describe how to get a certain type of value from a given configuration. 2. Configsource: Load configuration information from external sources (such as files, environment variables, system attributes, etc.).Ciris provides some default Configsource implementation, and can also be customized. 3. Read: Used to analyze the values you need from configvalue.Ciris provides default Read implementation for common types (such as String, int, Boolean, etc.), and can also be customized. Based on the above core concepts, we can use the Ciris framework through the following steps: Step 1: Define the configuration source and configuration item First, we need to define one or more configuration sources and specify their loading order.For example: import ciris.ConfigSource; ConfigSource configSource = ConfigSource.defaultFiles().env; In the above examples, we use the default configuration source, including the configuration information loaded from files and environment variables. Then, we need to define specific configuration items.For example: import ciris.ConfigValue; import ciris.readers.IntegerReader; ConfigValue<Integer> maxConnections = configSource.read("max.connections", IntegerReader); In the above example, we define a configuration item called "Max.Connections" and specify the type of the configuration item to Integer. Step 2: Read and process configuration information Once the definition of configuration items is completed, we can read and process configuration information.For example: import ciris.ConfigEntry; import ciris.ConfigReader; ConfigReader<Integer> getTimeout = ConfigReader.catchNonFatal(() -> configSource.read("timeout", IntegerReader).value()); ConfigReader<Integer> defaultTimeout = ConfigReader.defaultConfig(() -> 5000); ConfigReader<Integer> timeout = getTimeout.orElse(defaultTimeout); int timeoutValue = timeout.loadConfig().orThrow(); System.out.println("Timeout value: " + timeoutValue); In the above examples, we first define a configReader for reading the configuration item "timeout".Then, we define a default configuration item defaulttimeoutoutFinally, we use the loadconfig () method to load the configuration information, and use the orelse () method to specify the priority of obtaining the configuration item.In the end, we obtained the configuration value through the Orthrow () method and printed on the console. It should be noted that Ciris's configReader provides many methods for processing and conversion configuration values, such as MAP, Flatmap, Filter, etc.Can be used according to actual needs. In summary, this article deeply explores the technical principles of the Ciris framework and provides Java code examples to illustrate.By using Ciris, we can manage the configuration information of the application in a combined manner.In addition to the above -mentioned functions, Ciris also provides more advanced features, such as configuration cache, optional configuration items, etc., can be further learned and applied according to actual needs.