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aliases: - /en/overview/mannual/java-sdk/reference-manual/protocol/memcached/ description: Memcached Protocol linkTitle: Memcached Protocol title: Memcached Protocol type: docs weight: 5

RPC protocol based on memcached [^1].

{{% alert title=“Tip” color=“primary” %}} Support for version 2.3.0 and above {{% /alert %}}

Registering the memcached service address

RegistryFactory registryFactory = ExtensionLoader.getExtensionLoader(RegistryFactory.class).getAdaptiveExtension();
Registry registry = registryFactory.getRegistry(URL.valueOf("zookeeper://10.20.153.10:2181"));
registry.register(URL.valueOf("memcached://10.20.153.11/com.foo.BarService?category=providers&dynamic=false&application=foo&group=member&loadbalance=consistenthash"));

Referencing on the client side

Use on the client side [^2]:

<dubbo:reference id="cache" interface="java.util.Map" group="member" />

Or, connect directly point-to-point:

<dubbo:reference id="cache" interface="java.util.Map" url="memcached://10.20.153.10:11211" />

Custom interfaces can also be used:

<dubbo:reference id="cache" interface="com.foo.CacheService" url="memcached://10.20.153.10:11211" />

It is recommended that method names match the standard method names of memcached, namely: get(key), set(key, value), delete(key).

If the method names do not match the standard method names of memcached, a mapping relationship needs to be configured [^3]:

<dubbo:reference id="cache" interface="com.foo.CacheService" url="memcached://10.20.153.10:11211" p:set="putFoo" p:get="getFoo" p:delete="removeFoo" />

[^1]: Memcached is an efficient KV cache server [^2]: No need to be aware of the address of Memcached [^3]: Where “p:xxx” is the standard p tag of spring