saying:Any problem in computer science can is solved by anther layer of indirection.CacheTogether we can see that the cache is a kind of agent in a sense, through the advantages of one aspect of itself to compensate for the limitations of the actual response, in theory, the trade-offs between time and space.Several common caches are listed below1, Database CacheReduce file system read and write times and program response time by caching query statements into memory2, application cacheReduce dat
Personal notes are for informational purposes only.
1, spring data Redis recommended Jedis,jedis is a Redis Java client.
2, redisconnectionfactory
The spring data Redis is connected to the Redis through redisconnectionfactory t
Tags: experimental exception uid data-template SetValue tar ret bootIn addition to string types, we often store objects in Redis, and then we wonder if we can RedisTemplate initialize and manipulate them using similar. However, spring boot does not support direct use, we need to implement the RedisSerializer interface to serialize and deserialize incoming objects, and we will perform the read and write oper
object, you must also provide two types of List information, the element type in the list, to be correctly deserialized. This increases the complexity of the code. However, these difficulties can be overcome, so we still choose JSON as a serialized storage method.Where is the code written?No doubt it AOP 's time to play. In our case, the persistence framework uses MyBatis that, so our task is to intercept Mapper the invocation of the interface method by writing the Around(环绕通知) following logic:
Integration of Redis and spring frameworksI'm creating a MAVEN project here that manages dependencies between jar packages by locking the version number with Maven1. In the Pom file, introduce the coordinates of the spring and Redis jar packages:2. Encapsulate the basic data type operation of
1. Adding a jar package depends on using MAVEN form
2. Project configuration file setting Redis information
Redis:
Pool: 8
0
8
10000
09Note: Be sure to go under the spring node
3. New initialization Jedispool Bean let spring boot boot to load the bean's configuration information
@Configuration
@En
Use Redis to cache (add cache when querying), Cache sync (delete cache when adding and deleting), Redis persistence (aof: Poor performance, data integrity; RDB: Save periodically, possibly lose data)Redis Standalone version - BeanID= "Jedispool"class= "Redis.clients.jedis.JedisPool"> Constructor-argname= "Host"value= "192.168.25.128"/> Constr
;Property>Bean>BeanId= "Redistemplatec"Class= "Org.springframework.data.redis.core.RedisTemplate">PropertyName= "ConnectionFactory"Ref= "ConnectionFactory"/>PropertyName= "Keyserializer">BeanClass= "Org.springframework.data.redis.serializer.StringRedisSerializer"/>Property>PropertyName= "ValueSerializer">Set the value of the serializer, or the hexadecimal issue will occur when saving to Redis-BeanClass= "Org.springframework.data.redis.serializer.Strin
Problem Description
Recently we used spring cache + Redis to do caching. Under high concurrency the @cacheable annotation returns a null content. Look at the source code, in the use of annotations to get the cache, the Rediscache get method will first determine whether the key exists, and then to get the value. There's a copper leak, and when thread 1 judges that the key is there, then the key expires, and
Recent research into Redis, and spring data support for Redis, has found a strange phenomenon
First say the phenomenon, through the redistemplate under the Opsforhash method to store the value of the hash type, after the successful operation, to the Redis console to display the keys *, found a strange phenomenon, the i
These days are fine, the previous learning of the Redis code to tidy up, nonsense not much to say, on the steps.1, Pom.xml the introduction of resources; 2, configure Redis configuration file, here only configure a single-point database, the following will introduce the configuration of Redis cluster, here is not much to say;
Redis Support
code block
More support
Http://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-redis Redis Configuration
# Redis (redisproperties)
spring.redis.database= # database name
spring.redis.host=localhost # Server Host
spring.redis.pas
Redis is used as the cache in the Spring boot project.Create a spring boot maven project to add dependencies in Pom.xml Dependency> groupId>Org.springframework.bootgroupId> Artifactid>Spring-boot-starter-webArtifactid> version>1.5.3.RELEASEversion> Dependency> Depen
Doing Springmvc+redis integration exercises.It's Spring-data-redis and Jedis.The following error occurred after configuration:Caused By:java.lang.VerifyError: (Class:org/springframework/data/redis/connection/jedis/jedisconnectionfactory, Method:afterpropertiesset Signature: () V) incompatible argument to function at
When I recently made a project, I wrote an event push scenario. Before the implementation of the job is to query the database to see if there is no latest news. This way is very not elegant, anyway I can not tolerate, because envy itself relies on redis, just Redis also has the function of message queue, simply use Redis to achieve this message push.Before referr
When Spring Boot is familiar, it's easy to integrate an external extension, and it's easy to integrate with Redis, see the following steps to configure: First, add pom dependency
Ii. creation of Redisclient.java
Note that this class contains the package
Package Org.springframework.data.redis.connection.jedis;
Import Java.io.ByteArrayInputStream;
Import Java.io.ByteArrayOutputStream;
Import java.i
intValuesetinbetween = 23; $ Final intValuesetwithinsession = 42;Panax Notoginseng - /* the * By default all template method call creates a new connection-so + * WATCH, Mutli, EXEC, Unwatch won ' t work because of the missing A * Context. to do use of transaction support use Sessioncallback which the * reuses the underlying connection. + */ -Template.execute (NewSessioncallback() { $ $ @Override - PublicVoid Execute (redisoperations operations) -
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