org.apache.dubbo.rpc.protocol

Class AbstractProtocol

java.lang.Object

org.apache.dubbo.rpc.protocol.AbstractProtocol

All Implemented Interfaces:

Protocol

Direct Known Subclasses:

AbstractProxyProtocol, DubboProtocol, InjvmProtocol, MemcachedProtocol, MockProtocol, RedisProtocol, ThriftProtocol

public abstract class AbstractProtocol
extends Object
implements Protocol

abstract ProtocolSupport.

Constructor Summary

Constructors

Constructor and Description
AbstractProtocol()

Method Summary

Modifier and Type	Method and Description
void	destroy() Destroy protocol: 1.
<T> Invoker<T>	refer(Class<T> type, URL url) Refer a remote service: 1.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.dubbo.rpc.Protocol

export, getDefaultPort

Constructor Detail

AbstractProtocol

public AbstractProtocol()

Method Detail

destroy

public void destroy()

Description copied from interface: Protocol

Destroy protocol:
1. Cancel all services this protocol exports and refers
2. Release all occupied resources, for example: connection, port, etc.
3. Protocol can continue to export and refer new service even after it's destroyed.

Specified by:

destroy in interface Protocol

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.

Specified by:

refer in interface Protocol

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