FrameHeaderReader (libthrift 0.16.0 API)

All Known Implementing Classes:

DataFrameHeaderReader, FixedSizeHeaderReader, SaslNegotiationHeaderReader
```
public interface FrameHeaderReader
```
Read headers for a frame. For each frame, the header contains payload size and other metadata.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`clear()`	Clear the header and make it available to read a new header.
`boolean`	`isComplete()`
`int`	`payloadSize()`	As the thrift sasl specification states, all sasl messages (both for negotiatiing and for sending data) should have a header to indicate the size of the payload.
`boolean`	`read(TTransport transport)`	(Nonblocking) Read fields from underlying transport layer.
`byte[]`	`toBytes()`

- Method Detail
  - payloadSize
```
int payloadSize()
```
    As the thrift sasl specification states, all sasl messages (both for negotiatiing and for sending data) should have a header to indicate the size of the payload.
    
    Returns:
    
    size of the payload.
  - toBytes
```
byte[] toBytes()
```
    Returns:
    
    The received bytes for the header.
    
    Throws:
    
    java.lang.IllegalStateException - if isComplete returns false.
  - isComplete
```
boolean isComplete()
```
    Returns:
    
    true if this header has all its fields set.
  - clear
```
void clear()
```
    Clear the header and make it available to read a new header.
  - read
```
boolean read(TTransport transport)
      throws TSaslNegotiationException,
             TTransportException
```
    (Nonblocking) Read fields from underlying transport layer.
    
    Parameters:
    
    transport - underlying transport.
    
    Returns:
    
    true if header is complete after read.
    
    Throws:
    
    TSaslNegotiationException - if fail to read a valid header of a sasl negotiation message.
    
    TTransportException - if io error.