com.alibaba.dubbo.rpc.protocol.memcached

Class MemcachedProtocol

java.lang.Object

com.alibaba.dubbo.rpc.protocol.AbstractProtocol

com.alibaba.dubbo.rpc.protocol.memcached.MemcachedProtocol

All Implemented Interfaces:

Protocol

public class MemcachedProtocol
extends AbstractProtocol

MemcachedProtocol

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_PORT

Constructor Summary

Constructors

Constructor and Description
MemcachedProtocol()

Method Summary

Methods

Modifier and Type	Method and Description
<T> Exporter<T>	export(Invoker<T> invoker) Export service for remote invocation: 1.
int	getDefaultPort() Get default port when user doesn't config the port.
<T> Invoker<T>	refer(Class<T> type, URL url) Refer a remote service: 1.

Methods inherited from class com.alibaba.dubbo.rpc.protocol.AbstractProtocol

destroy

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEFAULT_PORT

public static final int DEFAULT_PORT

See Also:

Constant Field Values

Constructor Detail

MemcachedProtocol

public MemcachedProtocol()

Method Detail

getDefaultPort

public int getDefaultPort()

Description copied from interface: Protocol

Get default port when user doesn't config the port.

Returns:

default port

export

public <T> Exporter<T> export(Invoker<T> invoker)
                   throws RpcException

Description copied from interface: Protocol

Export service for remote invocation:
1. Protocol should record request source address after receive a request: RpcContext.getContext().setRemoteAddress();
2. export() must be idempotent, that is, there's no difference between invoking once and invoking twice when export the same URL
3. Invoker instance is passed in by the framework, protocol needs not to care

Type Parameters:

T - Service type

Parameters:

invoker - Service invoker

Returns:

exporter reference for exported service, useful for unexport the service later

Throws:

RpcException - thrown when error occurs during export the service, for example: port is occupied

refer

public <T> Invoker<T> refer(Class<T> type,
                   URL url)
                 throws RpcException

Description copied from interface: Protocol

Refer a remote service:
1. When user calls `invoke()` method of `Invoker` object which's returned from `refer()` call, the protocol needs to correspondingly execute `invoke()` method of `Invoker` object
2. It's protocol's responsibility to implement `Invoker` which's returned from `refer()`. Generally speaking, protocol sends remote request in the `Invoker` implementation.
3. When there's check=false set in URL, the implementation must not throw exception but try to recover when connection fails.

Type Parameters:

T - Service type

Parameters:

type - Service class

url - URL address for the remote service

Returns:

invoker service's local proxy

Throws:

RpcException - when there's any error while connecting to the service provider