Summary of Jooby Path Patterns

Jooby is a web framework that simplifies the development of web applications in Java. One of its important features is the handling of URL paths through path patterns. This summary explains the main concepts of path patterns in Jooby.

Key Concepts of Path Patterns

• Path Patterns: These are templates used to define how URLs are structured in your application. They help in routing requests to the appropriate handlers.
• Dynamic Segments: Parts of the path that can change, allowing you to create flexible routes. These are marked with curly braces {}.
• Static Segments: Fixed parts of the path that do not change. These are written as plain text.

Basic Syntax

• Static Path:
  Example: /users
  This matches the exact path /users.
• Dynamic Path:
  Example: /users/{id}
  This matches paths like /users/1, /users/2, etc., where {id} is a variable.

Wildcards

• Wildcard Patterns: Use * to match any number of characters.
  Example: /files/*
  This matches any path that starts with /files/, such as /files/document.txt.

Optional Parameters

• Optional Segments: Use ? to indicate that a segment is optional.
  Example: /users/{id}?/profile
  This matches both /users/1/profile and /users/1.

Examples

Optional Segment:

get("/users/{id}?/profile", (req) -> {
    String userId = req.param("id").value();
    return "Profile for user ID: " + userId;
});

Matches both /users/1/profile and /users/1.

Wildcard Route:

get("/files/*", (req) -> {
    String filePath = req.param("path").value();
    return "File path: " + filePath;
});

Matches any URL starting with /files/, such as /files/report.pdf.

Dynamic Route:

get("/users/{id}", (req) -> {
    String userId = req.param("id").value();
    return "User ID: " + userId;
});

Matches URLs like /users/1, returning "User ID: 1".

Basic Route:

get("/hello", () -> "Hello World");

Matches the exact URL /hello.

Conclusion

Path patterns in Jooby provide a powerful way to define how your application responds to different URLs. By understanding static, dynamic, wildcard, and optional segments, you can create flexible and robust routing for your web applications.