How to use memcached client in java web application specially in Struts 2 which is running on tomcat?

public class MemCacheClientInit {
    static MemcachedClient mcc = null;
    static String ipAdderss = "127.0.0.1";
    static int port = 11211;
    public static boolean isMemCacheInit = false;

    public static MemcachedClient getInstance() {
        if (mcc == null) {
            try {
                isMemCacheInit = initMemServer();
                mcc = new MemcachedClient(new InetSocketAddress(ipAdderss, port));
            }
            catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        return mcc;
    }

    private static boolean initMemServer() {
        try {
            String[] servers = {"localhost:11211",};
            Integer[] weights = {1};
            SchoonerSockIOPool pool = SchoonerSockIOPool.getInstance();
            pool.setServers(servers);
            pool.setWeights(weights);
            pool.setInitConn(5);
            pool.setMinConn(5);
            pool.setMaxConn(250);
            pool.setMaxIdle(1000 * 60 * 60 * 6);
            pool.initialize();
            pool.setHashingAlg(SchoonerSockIOPool.NEW_COMPAT_HASH);
            return true;
        }

        catch (Exception ex) {
            return false;
        }
    }
}

I am running this code directly from my DAO and setting objects in the Memcache, in the above code snippet in the InitMemServer method while getting instance of SchoonerSockIOPool it is throwing invocationTarget Exception.

I got the answer it was in the pom.xml
    <dependency>
    <groupId>spy</groupId>
    <artifactId>spymemcached</artifactId>
    <version>2.8.1</version>
    <scope>provided</scope>
    </dependency>
I have given scope as provided that should be compile.