package org.infinispan.demo.football.memcached;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.util.Collection;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentMap;
import net.spy.memcached.MemcachedClient;
/**
* A cache working via Memcached client (only few basic operations)
*
*/
class MemcachedCache<K, V> implements ConcurrentMap<K, V> {
private MemcachedClient client;
MemcachedCache(String hostname, int port) {
try {
this.client = new MemcachedClient(new InetSocketAddress(hostname, port));
} catch (IOException e) {
throw new RuntimeException("Unable to create a Memcached client", e);
}
}
private String toStringKey(Object key) {
if (key instanceof String) {
return (String) key;
} else {
throw new UnsupportedOperationException("Memcached cache only allows String keys!");
}
}
private Object decode(String s) {
if (s == null) {
return null;
} else {
Object o = Base64.decodeToObject(s);
return o;
}
}
@Override
@SuppressWarnings("unchecked")
public V get(Object key) {
String stringKey = toStringKey(key);
return (V) client.get(stringKey);
}
@Override
@SuppressWarnings("unchecked")
public V put(K key, V value) {
String stringKey = toStringKey(key);
V oldValue = (V) client.get(stringKey);
try {
if (!client.set(stringKey, 0, value).get()) {
throw new RuntimeException("put() failed");
}
} catch (Exception e) {
throw new RuntimeException(e);
}
return oldValue;
}
@Override
@SuppressWarnings("unchecked")
public V remove(Object key) {
String stringKey = toStringKey(key);
V oldValue = (V) client.get(stringKey);
try {
client.delete(stringKey).get();
} catch (Exception e) {
throw new RuntimeException(e);
}
return oldValue;
}
@Override
public void putAll(Map<? extends K, ? extends V> m) {
throw new UnsupportedOperationException("Unsupported");
}
@Override
public void clear() {
throw new UnsupportedOperationException("Unsupported");
}
@Override
public Set<K> keySet() {
throw new UnsupportedOperationException("Unsupported");
}
@Override
public Collection<V> values() {
throw new UnsupportedOperationException("Unsupported");
}
@Override
public Set<Entry<K, V>> entrySet() {
throw new UnsupportedOperationException("Unsupported");
}
@Override
public V putIfAbsent(K key, V value) {
throw new UnsupportedOperationException("Unsupported");
}
@Override
public boolean remove(Object key, Object value) {
throw new UnsupportedOperationException("Unsupported");
}
@Override
public boolean replace(K key, V oldValue, V newValue) {
throw new UnsupportedOperationException("Unsupported");
}
@Override
public V replace(K key, V value) {
return put(key, value);
}
@Override
public int size() {
throw new UnsupportedOperationException("Unsupported");
}
@Override
public boolean isEmpty() {
throw new UnsupportedOperationException("Unsupported");
}
@Override
public boolean containsKey(Object key) {
throw new UnsupportedOperationException("Unsupported");
}
@Override
public boolean containsValue(Object value) {
throw new UnsupportedOperationException("Unsupported");
}
}