How to create a handler
Introduction
Creating a custom handler in Sprout allows you to manage function registries, define custom logging, and handle errors according to your specific needs. Here’s a step-by-step guide on how to create your own custom handler.
Step 1: Understand the Handler Interface
The Handler
interface in Sprout defines the basic methods required to manage registries and functions. A typical handler in Sprout must implement the following methods:
Logger() *slog.Logger
: Returns the logger instance used for logging.AddRegistry(registry Registry) error
: Adds a single registry to the handler.AddRegistries(registries ...Registry) error
: Adds multiple registries to the handler.Functions() FunctionMap
: Returns the map of registered functions.Aliases() FunctionAliasMap
: Returns the map of function aliases.Build() FunctionMap
: Builds and returns the complete function map, ready to be used in templates.
Step 2: Create Your Custom Handler Struct
Create a struct that will serve as your custom handler. This struct should store the function map, alias map, and any other configurations you need.
Step 3: Implement the Handler Interface
Next, implement the Handler
interface methods in your custom struct. I take logger as example
Step 4: Initialize and Customize Your Handler
Create a function to initialize your custom handler, setting up the logger and any registries you need.
Step 5: Use Your Custom Handler
With your custom handler in place, you can now use it to register functions and integrate it with your templates.
Conclusion
Creating a custom handler in Sprout allows you to extend and customize the templating environment according to your needs. By implementing the Handler
interface, you gain full control over how functions are registered, managed, and used in your templates. This flexibility is key to building robust and maintainable Go applications.
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