| Class | Description | 
|---|---|
| HttpSerializer | 
 Abstract base class for Serializers; plugins that handle converting requests
 and responses between OpenTSDB's internal data and various popular formats
 such as JSON, XML, OData, etc. 
 | 
| PipelineFactory | 
 Creates a newly configured  
ChannelPipeline for a new channel. | 
| RpcPlugin | 
 The RPCPlugin allows for interacting with a TSD using different protocols
 such as Protobufs, Thrift, Memcache, anything folks want to create. 
 | 
| RTPublisher | 
 Real Time publisher plugin interface that is used to emit data from a TSD
 as data comes in. 
 | 
| StatsRpc | 
 Handles fetching statistics from all over the code, collating them in a
 string buffer or list, and emitting them to the caller. 
 |