Analysis of the technical principle of inserting cache frame in the Java class library
Analysis of the technical principle of inserting cache frame in the Java class library
overview:
Insert caching framework is a technology commonly used in Java applications. It can provide efficient data read and write operations and reduce dependence on external resources.This article will introduce the technical principles of the insertion cache framework and provide some Java code examples.
1. What is an insertion cache frame?
Insert caching framework is a software component for storing and retrieving data.It is a cache area that stores data in memory to improve data reading speed.The insertion cache frame can be used as an intermediate layer, which decouples the application and the back -end database or other external resources, thereby providing higher performance and scalability.
2. The working principle of inserting the cache framework
The core idea of inserting the cache frame is based on key value pairs.When the application needs to access a certain data, it first finds the corresponding keys in the cache.If the key is stored in the cache, the data is obtained directly from the cache, which avoids access to external resources.If the key does not exist in the cache, the application will load the data to the cache through a certain strategy and return it to the callable party.In this way, in subsequent access, the same data can be obtained directly from the cache to improve reading performance.
The following is an example of a simple plug -in cache framework code:
public class Cache {
private Map<String, Object> cache;
public Cache() {
this.cache = new HashMap<>();
}
public Object get(String key) {
return cache.get(key);
}
public void put(String key, Object value) {
cache.put(key, value);
}
}
In the above example, the `Cache` class is a simple insertion cache framework.The data is stored in the `Cache` object through the form value pair, and the data can be read and write through the` get` and `put` methods.
3. The advantage of inserting the cache framework
-A improvement of performance: By storing data in memory, frequent disk read/writing operations are avoided, and data reading speed is effectively improved.
-Capy to dependence on external resources: The insertion cache can be used as an intermediate layer, which decoupled the application and the back -end database or other external resources, thereby providing higher flexibility and scalability.
-Caping strategy: Inserting the cache framework usually supports multiple cache strategies, such as LRU (recently used) and LFU (at least often), etc., can be configured and adjusted according to actual needs.
4. Application scenarios of inserting cache framework
Insert caching framework is widely used in many Java applications, especially applicable to the following scenes:
-F frequent data reading: For data that needs to be read frequently, using insertion cache can greatly improve the reading performance and reduce access to the underlying storage.
-The data access frequency is irregular: If the frequency of data access is irregular, the cache can reduce unnecessary access to the underlying storage and improve the overall performance.
-The data calculation cost is high: If the calculation cost of the data is high, the calculation results can be stored through the cache to avoid repeated calculations and improve the response speed.
in conclusion:
Insert caching framework is a very practical and flexible technology, which is widely used in Java development.By caching data, the performance of data reading can be improved and dependence on underlying resources.Developers can choose the appropriate cache framework according to actual needs, and combine the appropriate cache strategy to optimize the performance of the application.
