pmill编程

Title: Getting Started with CMPI Programming

CMPI, or Common Manageability Programming Interface, is a standard interface that facilitates the development of management instrumentation for various management technologies, such as WBEM (WebBased Enterprise Management). CMPI enables interoperability between management applications and management instrumentation providers. Here's a comprehensive guide to help you get started with CMPI programming:

Understanding CMPI

CMPI provides a standardized interface for developing management instrumentation providers (MIPs) in a way that is independent of the underlying management technology. It abstracts the details of the management technology, allowing MIP developers to focus on implementing the management logic rather than dealing with technologyspecific intricacies.

Setting Up Development Environment

Before diving into CMPI programming, ensure that you have the necessary development environment set up:

1.

Compiler

: Use a C or C compiler compatible with your operating system.

2.

CMPI Implementation

: Choose a CMPI implementation library, such as OpenPegasus or SBLIM.

3.

Development Environment

: Set up your preferred development environment, like Visual Studio Code or Eclipse.

Basic CMPI Concepts

Providers

Providers are components that implement CMPI interfaces to expose management functionality. There are two types of providers:

Instance Providers

: Handle the creation, deletion, and enumeration of managed instances.

Method Providers

: Implement methods that operate on managed instances.

Broker

The CMPI broker acts as an intermediary between management applications and providers. It dispatches requests from management applications to the appropriate provider and returns the results back to the applications.

CMPI Data Types

CMPI defines several data types for representing management information, such as `CMPIString`, `CMPIUint32`, `CMPIBoolean`, etc. These data types are used to exchange data between providers and management applications.

Developing CMPI Providers

Implementing Instance Providers

To implement an instance provider, follow these steps:

1.

Include CMPI Headers

: Include the necessary CMPI headers in your provider code.

2.

Implement Provider Functions

: Implement the instance provider functions such as `enumerateInstanceNames`, `enumerateInstances`, `getInstance`, `createInstance`, `modifyInstance`, and `deleteInstance`.

3.

Compile and Link

: Compile your provider code and link it with the CMPI implementation library.

Implementing Method Providers

Method providers follow a similar process:

1.

Include Headers

: Include CMPI headers in your method provider code.

2.

Implement Method Functions

: Implement the method provider functions such as `invokeMethod`.

3.

Compile and Link

: Compile your method provider code and link it with the CMPI implementation library.

Registering Providers

Once you've implemented your providers, you need to register them with the CMPI broker. This involves creating a provider factory and registering it with the broker. The broker uses the factory to instantiate provider objects as needed.

Testing Providers

After registering your providers, test them to ensure they function correctly. You can use management applications or testing tools that interact with CMPI providers to verify their behavior.

Best Practices

To ensure the effectiveness and efficiency of your CMPI providers, consider the following best practices:

Keep Providers Lightweight

: Implement only the necessary functionality to minimize resource consumption.

Handle Errors Gracefully

: Implement error handling to handle exceptions and failures gracefully.

Document Your Providers

: Provide clear documentation for your providers to help users understand their functionality and usage.

Conclusion

CMPI programming provides a standardized approach to developing management instrumentation for various management technologies. By understanding the basic concepts, setting up the development environment, and following best practices, you can create robust and interoperable CMPI providers. Start exploring CMPI programming today to enhance the manageability of your systems and applications.