Package com.github.ambry.store

Interface Transformer

public interface Transformer

An interface for a transformation function. Transformations parse the message and may modify any data in the message (including keys). Needs to be thread safe.

Method Summary

Modifier and Type	Method	Description
TransformationOutput	transform(Message message)	Transforms the input Message into an output Message.
void	warmup(java.util.List<MessageInfo> messageInfos)	Warms up transformer with message infos representing messages it will transform later

Method Detail

transform

TransformationOutput transform(Message message)

Transforms the input Message into an output Message.

Parameters:

message - the input Message to change.

Returns:

the output TransformationOutput.

warmup

void warmup(java.util.List<MessageInfo> messageInfos)
     throws java.lang.Exception

Warms up transformer with message infos representing messages it will transform later

Parameters:

messageInfos - message infos that will be used to warmup transformer, each message info corresponds to a message the transformer is expected to convert in the immediate future

Throws:

java.lang.Exception