Plug-in support method based on preloading mechanism

Abstract

The invention relates to a plug-in support method based on a preloading mechanism. The method comprises the following steps that 1, a main program starts, in addition, a plug-in operation framework is loaded, and the plug-in operation framework is in charge of reading an external plug-in; 2, the plug-in operation framework starts an independent class loader for the external plug-in, the class loader loads the types in the plug-in, and in addition, the types are stored in the local global buffer; 3, the plug-in operation framework obtains the current class loader of the main program, a parent loader of the current class loader of the main program is replaced into the agent class of the original parent loader, and the agent class of the original parent loader can intercept all classes sent to the original class loader for loading and calling; 4, when the main program requests to call the Class type, the Class type is found in the original parent loader according to the type names, if the target type is not found, whether the types provided by the corresponding plug-in exists or not is matched in the local global buffer, if the matching is successful, the direct loading and executing is carried out, and otherwise, exception is thrown.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a plug-in support method based on a preloading mechanism. Background technique [0002] Modern software applications are generally developed based on object-oriented thinking. In order to execute program codes, corresponding classes or interfaces need to be loaded. The so-called loading is the process of finding the binary form of a class or an interface and using the binary form to construct a class object representing this class or this interface. [0003] Generally speaking, after the program is developed, the object type contained in the compiled result is determined, that is, its application logic is determined. If it is desired to enhance software functions without modifying the main body of the software program, the system needs to have the ability to dynamically load external object types at runtime. [0004] In order to solve the above problems, it is necessary to...

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Problems solved by technology

[0009] Among the above two methods, although the first method is simple to implement, because the script is interpreted and executed, the operating efficiency is poor, and the source code of the script is exposed to the outside world, so it is only suitable for some simple function extensions

Although the second method has high operating efficiency, it can only realize one-way interface calling, that is, the plug-in can call a specific internal interface of the main program, but the main program cannot call the specific interface of the plug-in arbitrarily like calling an internal component. This restricts the expansion capability of plug-ins, and also creates obstacles for the migration and transformation of some historical programs.

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