spring-cache-mongodb

Spring Cache implementation based on MongoDB

Install

Maven dependency

<dependency>
  <groupId>com.arhs-group</groupId>
  <artifactId>spring-cache-mongodb</artifactId>
  <version>1.0.1</version>
</dependency>

From source

To install this library, you need:

• Java 8
• Maven 3

git clone https://github.com/arhs/spring-cache-mongodb.git
cd spring-cache-mongodb
mvn clean install

Usage

Custom configuration

To customize the creation of a cache manager, create a Java Bean in a configuration class:

@Autowired
private MongoTemplate mongoTemplate;

@Bean
public CacheManager cacheManager() {
	// Create a "cacheName" cache that will use the collection "collectionName" with a TTL 7 days.
	MongoCacheBuilder cache = MongoCacheBuilder.newInstance("collectionName", mongoTemplate, "cacheName");
	cache.withTTL(604800);
	List<Cache> caches = new ArrayList<>();
	caches.add(cache);

	// Create a manager which will make available the cache created previously.
	return new MongoCacheManager(caches);
}

Autoconfiguration

There is also an autoconfiguration class that will setup everything for you provided you have expressed the following properties.

.properties

# TTL (in seconds). This property is optional, the default value is: 7 days.
spring.cache.mongo.caches[0].ttl =

# MongoDB collection name.
spring.cache.mongo.caches[0].collectionName =

# Cache name for the @Cacheable annotation.
spring.cache.mongo.caches[0].cacheName =

# Value that indicates if the collection must be flushed when the application starts.
spring.cache.mongo.caches[0].flushOnBoot =

YAML

spring:
  cache:
    mongo:
      caches:
        -
      	  # TTL (in seconds).
          ttl: 
          # MongoDB collection name.
          collectionName:
          # Cache name for the @Cacheable annotation.
          cacheName:
          # Value that indicates if the collection must be flushed when the application starts.
          flushOnBoot:

How to use cache?

After the cache has been configured, you can use the Cacheable annotation. In the following example, the cache "myCache" is used like this:

@Cacheable(value = "myCache", key = "#id")
public Model getModel(String id) {
	// [...]
}

The id parameter is used as document identifier. Note that the cache key must be a of type java.lang.String.

The Model object will be stored in MongoDB collection for future use (as the TTL has not expired). Note that cache elements must be serializable (i.e. implement java.io.Serializable).

License

The MIT License (MIT)

Copyright (c) 2016 ARHS Group

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnishet to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.