org.apache.flink.runtime.io.network.netty

接口 OutboundChannelHandlerFactory

@Experimental
public interface OutboundChannelHandlerFactory

Custom netty outbound handler factory in order to make custom changes on netty outbound data. Good example usage of this API is custom authentication. When the user wants to send authentication information then the instantiated channel handler can modify the HTTP request. Since implementations are loaded with service loader it's discouraged to store any internal state in factories.

方法概要

限定符和类型	方法和说明
Optional<org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandler>	createHandler(org.apache.flink.configuration.Configuration configuration) Creates new instance of ChannelHandler
int	priority() Gives back priority of the ChannelHandler.

方法详细资料

priority

int priority()

Gives back priority of the ChannelHandler. The bigger the value is, the earlier it is executed. If multiple handlers have the same priority then the order is not defined.

返回:

the priority of the ChannelHandler.

createHandler

Optional<org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandler> createHandler(org.apache.flink.configuration.Configuration configuration)
                                                                                throws org.apache.flink.util.ConfigurationException

Creates new instance of ChannelHandler

参数:

configuration - The Flink Configuration.

返回:

ChannelHandler or null if no custom handler needs to be created.

抛出:

org.apache.flink.util.ConfigurationException - Thrown, if the handler configuration is incorrect.