Using Memcached2 for universal cache processing in Java API development

With the growth of applications and the increase in the number of users, data reading and writing efficiency has gradually become an increasingly important issue. Caching technology has received more and more attention and applications because of its high efficiency, stability and real-time performance. However, there are many details that need to be paid attention to when using caching technology in Java API development. This article will introduce how to use Memcached2 for universal caching processing.

1. What is Memcached2?

Memcached2 is a distributed memory object caching system that can store any type of data and lookup data using simple key values. Memcached2 can run on multiple servers, reducing load through distributed caching and providing high availability.

2. Why choose to use caching technology?

One of the main reasons for using caching technology in applications is to improve system efficiency. Cache can store frequently queried data in memory, which can avoid reading the database for every query, thus greatly reducing the time of reading and writing the database. At the same time, caching technology can also optimize bandwidth utilization, reduce network latency, and improve application performance and response speed.

3. How to use Memcached2 for caching?

Using Memcached2 can help us reduce database access, shorten access time, and improve the scalability and stability of the system. In Java API development, you can use a Java client to interact with Memcached2. The following are the basic steps for caching using the Java client:

1. Introduction of the Java client library

The Java client library of Memcached2 can be introduced directly through Maven or Gradle. After introducing the client library, we can directly interact with Memcached2 by using Java classes in our code.

2. Establish a connection with Memcached2

The Java client using Memcached2 needs to establish a connection with the server first. We can create a MemcachedClient object by wrapping the connection information in a Configuration object.

Configuration config=new Configuration(“127.0.0.1:11211”);
MemcachedClient client=new MemcachedClient(config);

3. Set cache data

Use the set method to store data in the cache. The parameters of this method are key name, value and expiration time. The unit of expiration time is seconds.

boolean success=client.set(“key”,60,”value”);

4. Get cache data

Use the get method to retrieve the corresponding value from the cache based on the key name.

Object value=client.get(“key”);

5. Delete cache data

Use the delete method to delete the values ​​in the cache.

boolean success=client.delete(“key”);

It should be noted that when using caching technology, we should avoid cache avalanche, that is, all the data in the cache are invalidated in batches at the same time, causing the database to crash due to a large number of requests in a short period of time. . You can use the "cache warm-up" method, which updates the cache in advance before the cache data becomes invalid to avoid cache avalanches.

4. Summary

Using caching technology in applications can greatly improve the efficiency and response speed of the system. We can use Memcached2 for caching, which has high availability and distributed caching capabilities. In Java API development, we can use Java clients to interact with Memcached2 and process cached data through set, get, delete and other methods. When using caching technology, you need to pay attention to avoid cache avalanche problems. You can prevent such problems from occurring through "cache warm-up".

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