docs: optimised docs

guid/README.md

@@ -2,68 +2,37 @@
 
 ## Introduction
 
-Module `guid` is a library that provides utilities for generating and working with globally unique
-identifiers (GUIDs). GUIDs are globally unique across all devices and systems, making them ideal
-for various use cases like database record keys, distributed systems, and tracking objects.
+Module `guid` serves as a guid creator for other `JDevKit` modules. You can also use this module as a guid creator standards.
 
-The `guid` module offers a reliable and efficient GUID generator, allowing developers to create
-unique identifiers with low collision probability. It also provides features to customize the
-format of generated GUIDs, making it flexible and suitable for different applications.
+We have already implemented `SnowflakeGuidCreator`, you can also implement a custom guid creations by implementing `com.onixbyte.guid.GuidCreator`.
 
-With `guid`, developers can easily integrate globally unique identifiers into their projects,
-ensuring data integrity, avoiding duplicates, and simplifying the identification of objects across
-various systems. The module is designed to be simple to use, highly performant, and compatible with
-different programming languages and frameworks.
+## Example usage
 
-## Prerequisites
+### A UUID creator
 
-This whole `JDevKit` is developed by **JDK 17**, which means you have to use JDK 17 for
-better experience.
-
-## Installation
-
-### If you are using `Maven`
-
-It is quite simple to install this module by `Maven`. The only thing you need to do is find your
-`pom.xml` file in the project, then find the `<dependencies>` node in the `<project>` node, and add
-the following codes to `<dependencies>` node:
-
-```xml
-<dependency>
-	<groupId>com.onixbyte</groupId>
-    <artifactId>devkit-utils</artifactId>
-    <version>${devkit-utils.version}</version>
-</dependency>
+```java
+GuidCreator<UUID> uuidCreator = (GuidCreator<UUID>) UUID::randomUUID;
 ```
 
-And run `mvn dependency:get` in your project root folder(i.e., if your `pom.xml` is located at
-`/path/to/your/project/pom.xml`, then your current work folder should be `/path/to/your/project`),
-then `Maven` will automatically download the `jar` archive from `Maven Central Repository`. This
-could be **MUCH EASIER** if you are using IDE(i.e., IntelliJ IDEA), the only thing you need to do
-is click the refresh button of `Maven`.
+### A custom guid creator
 
-If you are restricted using the Internet, and have to make `Maven` offline, you could follow the
-following steps.
+Assume that you need serial guid creator.
 
-1. Download the `jar` file from any place you can get and transfer the `jar` files to your work
-   computer.
-2. Move the `jar` files to your local `Maven` Repository as the path of
-   `/path/to/maven_local_repo/com/onixbyte/devkit-utils/`.
-
-### If you are using `Gradle`
-
-Add this module to your project with `Gradle` is much easier than doing so with `Maven`.
-
-Find `build.gradle` in the needed project, and add the following code to the `dependencies` closure
-in the build script:
-
-```groovy
-implementation 'com.onixbyte:guid:${guid.version}'
+```java
+@Component
+public class CustomGuidCreator implementes GuidCreator<String> {
+    
+    public final RedisTemplate<String, Long> serialRedisTemplate;
+    
+    @Autowired
+    public CustomGuidCreator(RedisTemplate<String, Long> serialRedisTemplate) {
+        this.serialRedisTemplate = serialRedisTemplate;
+    }
+    
+    @Override public String nextId() {
+        return "SOME_PREFIX" + serialRedisTemplate.opsForValue().get("some_serial_key");
+    }
+    
+}
 ```
 
-### If you are not using `Maven` or `Gradle`
-
-1. Download the `jar` file from the Internet.
-2. Create a folder in your project and name it as a name you like(i.e., for me, I prefer `vendor`).
-3. Put the `jar` file to the folder you just created in Step 2.
-4. Add this folder to your project `classpath`.