MessageLengthDecoder (SNMP4J 3.3.1)

All Known Implementing Classes:

DefaultTcpTransportMapping.SnmpMesssageLengthDecoder
```
public interface MessageLengthDecoder
```
The MessageLengthDecoder needs to be implemented for connection oriented transport mappings, because those transport mappings have no message boundaries. To determine the message length, the message header is decoded in a protocol specific way.

Since:

1.7

Version:

1.7

Author:

Frank Fock

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`MessageLength`	`getMessageLength(java.nio.ByteBuffer buf)`	Returns the total message length to read (including header) and the actual header length.
`int`	`getMinHeaderLength()`	Returns the minimum length of the header to be decoded.

- Method Detail
  - getMinHeaderLength
```
int getMinHeaderLength()
```
    Returns the minimum length of the header to be decoded. Typically this is a constant value.
    
    Returns:
    
    the minimum length in bytes.
  - getMessageLength
```
MessageLength getMessageLength(java.nio.ByteBuffer buf)
                        throws java.io.IOException
```
    Returns the total message length to read (including header) and the actual header length.
    
    Parameters:
    
    buf - a ByteBuffer with a minimum of getMinHeaderLength().
    
    Returns:
    
    the total message length in bytes and the actual header length in bytes.
    
    Throws:
    
    java.io.IOException - if the header cannot be decoded.