tspkg-base 0.1.4

Secondary development platform base

tspkg_base

Secondary development platform base for Python applications.

Provides AOP, Hook, and Rewrite capabilities, allowing external business packages to dynamically take over, rewrite, or enhance the execution logic of original methods without modifying the original project code.

Installation

pip install tspkg_base
# or
pip install tspkg_base==0.1.0 -i https://pypi.org/simple

Usage

Your Project

Example code

• bootstrap code
  • This code is necessary because it loads the tspkg package.

from tspkg_base.runtime.bootstrap import bootstrap

result = bootstrap(tspkg_dir=tspkg_dir)
logger.info(f"Bootstrap result: {result['loaded']} loaded, {result['failed']} failed")

• entry code

from tspkg_base import aop_entry


# Usage example
@aop_entry(key="order.create")
def create_order(user_id: int, product_id: int, quantity: int = 1) -> dict:
    """
    Create order (original method)

    This method is decorated with @aop_entry and can be taken over or enhanced
    by rewrite methods in secondary development packages.
    """
    logger.info(f"Creating order: user_id={user_id}, product_id={product_id}, quantity={quantity}")

    # Simulate order creation logic
    order_id = 10000 + user_id  # Simple order ID generation

    result = {
        "order_id": order_id,
        "user_id": user_id,
        "product_id": product_id,
        "quantity": quantity,
        "status": "created",
        "created_by": "original_code"
    }

    logger.info(f"Order created: {result}")
    return result

Secondary Development Project

Project's directory

your_business_pkg/
├── code/                    # required：Python source code
│   ├── __init__.py
│   └── your_module.py      # your rewrite code
└── ...                      # other[optional]

Example code

from tspkg_base.aop.decorators import rewrite
from tspkg_base.aop.context import ExecutionContext


@rewrite(target="order.create", mode="around")
def my_create_order(ctx: ExecutionContext):
    """
    Rewrite order creation logic

    This rewrite method will completely take over the execution of the original method.
    """
    # Get original method arguments
    args = ctx.get_args()
    kwargs = ctx.get_kwargs()

    user_id = args[0] if len(args) > 0 else kwargs.get('user_id')
    product_id = args[1] if len(args) > 1 else kwargs.get('product_id')
    quantity = args[2] if len(args) > 2 else kwargs.get('quantity', 1)

    # You can do some preprocessing here
    # For example: parameter validation, permission checks, etc.
    if user_id <= 0:
        return {
            "error": "Invalid user_id",
            "user_id": user_id
        }

    # Call original method
    original_result = ctx.call_original()

    # Modify result
    original_result["modified_by_rewrite"] = True
    original_result["rewrite_message"] = "This order was created with rewrite logic"
    original_result["rewrite_version"] = "1.0.0"

    # You can add additional business logic
    # For example: send notifications, log records, etc.

    return original_result

Pack Secondary Development Project

• Please zip your project directory and rename the file extension from zip to tspkg.
• Note that the directory compressed using zip software is not encrypted, but it can meet most scenarios.
• This software supports encryption keys. If you need further assistance, please contact the author

UnPack Secondary Development Project

• It should be noted that if you have specified the tspkg directory in your program, simply place tspkg in this directory. In short, they must be consistent.

# The directory parameter for loading tspkg is specified by tspkg_dir

result = bootstrap(tspkg_dir=tspkg_dir)

Features

• AOP (Aspect-Oriented Programming) support
• Hook mechanism
• Method rewriting (Rewrite) capability
• Dynamic code injection

License

MIT License

FAQ

Q: How to know the signature of the original method?

A: You need to confirm with the original project development team, or check the original project documentation. The rewrite code should be compatible with the original method signature.

Q: Can rewrite call other modules?

A: Yes, but please note:

• Ensure that dependent modules are available in the original project
• Avoid importing internal modules of the original project (may cause version conflicts)
• It is recommended to only use standard library and known third-party libraries

Q: Will multiple rewrites conflict?

A: Each target can only have one rewrite. If multiple TSPKG packages contain the same target, the later loaded one will override the earlier one.

Q: How to update rewrite?

A: Repackage the TSPKG file, replace the original file, and then restart the original project.