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This article mainly introduces "how to use Java to achieve redis connection pool". In daily operation, I believe many people have doubts about how to use Java to achieve redis connection pool. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "how to use Java to achieve redis connection pool". Next, please follow the editor to study!

1.Redis client 1.1.Redis Desktop Manager

Use the right tools to get twice the result with half the effort, and it's naturally good to use redis-cli. I recommend a Redis visualization tool I often use, Redis Desktop Manager.

2.Redis connection pool 2.2.0. Connection pool

Pool technology is widely used in system development, such as JDBC connection pool, thread pool and so on. Connection pooling is a technique for creating and managing a buffer pool of connections that are ready to be used by any thread that needs them.

When dealing with a task, most of us have to complete it in milliseconds. If we create and close resources repeatedly, it will take a long time and a lot of system resources.

Use connection pooling advantage

Reduce connection creation time

The connection is created when the system is initialized and is accessed directly from the pool when needed, reducing the time overhead.

Simplified programming mode

When using connection pooling, each individual thread can operate as if it had created its own JDBC connection.

Controlled use of resources

Connection pooling can control the resource occupancy of a module and will not allow a module to occupy too much resources and cause the whole system to crash.

2.1.Redis connection pool 2.1.1. Introduction of preface

In the past, when there was no open source connection pool, many people wrote their own connection pooling tools, which simply created a collection, stored a batch of connections, and maintained them dynamically. Make sure that each connection is valid.

2.1.2.Redis connection pool

Some of the code involved in this tutorial is written in Java.

Maven dependency, introducing pom.xml file

Pom.xml

Redis.clients jedis 3.3.0

RedisUtil.java

Public final class RedisUtil {/ / IP address private static String ADDR = "127.0.0.1"; / / port number private static int PORT = 6379; / / redis server password private static String PWD = "123456"; / / maximum number of available connection instances. Default is 8. If you assign a value of-1, you will not be restricted to private static Integer MAX_TOTAL = 1024. / / controls the maximum number of jedis instances whose state is idle in a connection pool. The default value is 8 private static Integer MAX_IDLE = 200; / / the maximum wait time for available connections is in ms, which means never timeout. If the wait timeout throws JedisConnectionException private static Integer MAX_WAIT_MILLIS = 10000; / / timeout private static Integer TIMEOUT = 10000 / / whether to perform validate operation in advance when using a jedis instance. If the result is true, the jedis instance can use private static Boolean TEST_ON_BORROW = true; / / jedis connection pool private static JedisPool jedisPool = null / * initialize the static block of the jedis connection pool, which is executed the first time the RedisPool class loads, and then no longer executes * / static {try {JedisPoolConfig conf = new JedisPoolConfig () / * * JedisPoolConfig in the higher version of jedis jar does not have setMaxActive and setMaxWait attributes, because this method is officially enabled in the high version *. Replace * maxActive = > maxTotal * maxWait = = > maxWaitMillis * / / set the maximum number of connected instances conf.setMaxTotal (MAX_TOTAL) / / set the maximum number of idle jedis instances conf.setMaxIdle (MAX_IDLE); / / set the maximum time to wait for available connections conf.setMaxWaitMillis (MAX_WAIT_MILLIS); / / set whether to test borrowing conf.setTestOnBorrow (TEST_ON_BORROW) in advance / / New jedis connection pool jedisPool = new JedisPool (conf, ADDR, PORT, TIMEOUT, PWD);} catch (Exception e) {e.printStackTrace () }} / * * obtain the jedis instance to manipulate the data, and return the connection to the connection pool jedis.close () * @ return * / public synchronized static Jedis getRedis () {try {if (jedisPool! = null) {/ / get the jedis instance Jedis jedis = jedisPool.getResource () Return jedis;} else {System.out.println ("Jedis connection pool not found!") ; return null;}} catch (Exception e) {e.printStackTrace (); return null }} / * * is used to recycle Jedis object resources. Users need to use this method to release resources, otherwise they will occupy resources all the time. In the new version, `returnResource (jedis) will be discarded and not recommended, `directly call `jedis.close (); `return the connection to the connection pool. * @ param Jedis jedis * / public synchronized static void returnJedis (Jedis jedis) {try {if (jedis! = null) {/ / Recycle jedis object resources jedisPool.returnResource (jedis); System.out.println ("Jedis was successfully recycled!") ;}} catch (Exception e) {e.printStackTrace ();} at this point, the study on "how to implement redis connection pooling with Java" is over, hoping to solve everyone's doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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