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redis-aop

redis-aop is a Spring AOP based caching utility for redis, built on top of jedis client. User can make use of several annotation that comes with this utility project.

Usage

@CachePut @CacheDelete @Cacheable, are the three annotaiton that are available.

@CachePut: Use it in any save method, when the saved object needs to be saved in redis too. Note, that the save object needs to be returned by method for it to work.

@CacheDelete: Use it in any delete method, it will use the key from method params based on input and delete respective cache from redis.

@CacheDelete: Use this for any sort of get operation. It will return if the object is available in redis based on input param key, if not available, will call the get method and save in redis then return the object to client.

Annotation Params:

Param Name	Description	Default
cacheName or cacheNames(Used in put and save)	Cache name from where data needs to be fetched. This is redis key
keyExpression	This expression will determine the cache key from method input params
isAsync	if true save in redis operation will be async	false
keyGenerator	two values supported in this SHA or CONCAT. If SHA, cache key will be created using sha hash of param combination. If CONCAT is used, cache key will be created by concatenating params.	SHA
compress	If set to true, framework will use GZIP compression on data.	false

Examples:

1. Below Example depicts save operation:

@CachePut(cacheNames = {
      "CUSTOM_OBJECT_CACHE" }, keyExpression = "#param1.id,#param1.name")
public CustomObject saveObject(CustomObject object){
  return customRepository.save(object);
}

In above #param1 represents first param,#param2 represents second and so on.

2. Below example depicts delete operation.

@CacheDelte(cacheNames = {
      "CUSTOM_OBJECT_CACHE" }, keyExpression = "#param1")
public void deleteById(int id){
  //some delete operation
}

Above will delete any data in key CUSTOM_OBJECT_CACHE for hash #param1 i.e. given id

3. Below example depicts get operation:

@Cacheable(cacheName = "CUSTOM_OBJECT_CACHE", keyExpression = "#param1,#param2")
public void getByIdAndName(int id, String name){
  //some  operation
  return customObject;
}

NOTE: If no keyExpression is passed, then all params will be used for creating cache key.

How it works?

Uses spring AOP for annotation based interceptors and to parse input params Spring Expression is used.

Getting started: project setup

Just edit the redis.properties file