What is the principle and purpose of Java caching?
A Java cache is a temporary storage area used to store data, which can increase data access speed and improve system performance. In Java, caches typically use memory to store data for faster reading and writing.
The principle of Java caching is to store frequently accessed data in memory. When needing to access this data, it first checks the cache, if the corresponding data is found, it is directly returned. If not found, it retrieves the data from the source and stores it in the cache for future use. This helps avoid frequent database or other IO operations, improving the system’s response speed and performance.
The main functions of Java caching include the following:
- Improving system performance: Cache can reduce access to underlying data sources, thereby reducing the number of IO operations and enhancing system response speed and performance.
- Reduce database pressure: Utilizing caching allows for storing some data in memory, reducing the need to access the database and thereby easing the database load.
- Enhance user experience: Utilizing caching can speed up data access, reduce user wait time, and provide a better user experience.
- Reduce system costs: By using caching, the frequency of accessing underlying data sources can be decreased, leading to lower usage of hardware and network resources, consequently reducing system costs.
- Improving system scalability: by caching hot data in memory, system throughput and concurrency capabilities are enhanced, ultimately improving system scalability. In short, Java caching can significantly boost system performance and responsiveness, reduce access to underlying data sources, and provide a better user experience.
