Memcached Integration with Grails

sudo apt-get install memcached

sudo yum install memcached.

netstat -tap | grep memcached

tcp 0 0 localhost:11211 *:* LISTEN 2132/memcached

sudo service memcached start

import net.spy.memcached.AddrUtil
import net.spy.memcached.MemcachedClient
import org.springframework.beans.factory.InitializingBean

class MemcachedService implements InitializingBean {

    static final Object NULL = "NULL"
    def MemcachedClient memcachedClient

    def void afterPropertiesSet() {
        memcachedClient = new MemcachedClient(AddrUtil.getAddresses
("localhost:11211"))
    }

    def get(String key) {
        return memcachedClient.get(key)
    }

    def set(String key, Object value) {
        memcachedClient.set(key, 600, value)
    }

    def delete(String key) {
        memcachedClient.delete(key)
    }

    def clear() {
        memcachedClient.flush()
    }

    def update(key, function) {
        def value = function()
        if (value == null) value = NULL
        set(key, value)
        return value
    }

    def get(key, function) {
        def value = get(key)
        if (value == null) {
            value = update(key, function)
        }
        return (value == NULL) ? null : value;
    }
}

class ContactController {

    def memcachedService

    ...

}

memcachedService.set(key,value)

def cachedContactInstanceList = memcachedService.get("key")
log.debug "output: "+cachedContactInstanceList
if(cachedContactInstanceList == null){
// no key is found with the given key name, 
//so you have to call set() method here to set the key.
}
else{
// you got the list, you can perform any offset like action on this too.
}

	
telnet localhost 11211
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
flush_all
OK