org.jgroups.protocols.pbcast

## Class NakAckHeader

- java.lang.Object
- - org.jgroups.Header
  - - org.jgroups.protocols.pbcast.NakAckHeader

All Implemented Interfaces:
  Streamable

    public class NakAckHeader
    extends Header

Author:
  Bela Ban

### Field Summary

Fields
`static byte` `MSG`
`static byte` `XMIT_REQ`
`static byte` `XMIT_RSP`

### Constructor Summary

Constructors
Constructor and Description
`NakAckHeader()`

### Method Summary

Methods
`NakAckHeader` `copy()`
`static NakAckHeader` `createMessageHeader(long seqno)`
`static NakAckHeader` `createXmitRequestHeader(long low, long high, Address orginal_sender)`
`static NakAckHeader` `createXmitResponseHeader()`
`Range` `getRange()`
`Address` `getSender()`
`long` `getSeqno()`
`byte` `getType()`
`void` `readFrom(java.io.DataInputStream in)` Read the state of the current object (including superclasses) from instream Note that the input stream must not be closed
`int` `size()` To be implemented by subclasses.
`java.lang.String` `toString()`
`static java.lang.String` `type2Str(byte t)`
`void` `writeTo(java.io.DataOutputStream out)` Write the entire state of the current object (including superclasses) to outstream.

### Methods inherited from class java.lang.Object

`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

### Field Detail

#### MSG

    public static final byte MSG

See Also:
  Constant Field Values

#### XMIT_REQ

    public static final byte XMIT_REQ

See Also:
  Constant Field Values

#### XMIT_RSP

    public static final byte XMIT_RSP

See Also:
  Constant Field Values

### Constructor Detail

#### NakAckHeader

    public NakAckHeader()

### Method Detail

#### createMessageHeader

    public static NakAckHeader createMessageHeader(long seqno)

#### createXmitRequestHeader

    public static NakAckHeader createXmitRequestHeader(long low,
                                       long high,
                                       Address orginal_sender)

#### createXmitResponseHeader

    public static NakAckHeader createXmitResponseHeader()

#### getType

    public byte getType()

#### getSeqno

    public long getSeqno()

#### getRange

    public Range getRange()

#### getSender

    public Address getSender()

#### writeTo

    public void writeTo(java.io.DataOutputStream out)
                 throws java.io.IOException

Description copied from interface: `Streamable`
Write the entire state of the current object (including superclasses) to outstream. Note that the output stream must not be closed

Throws:
  `java.io.IOException`

#### readFrom

    public void readFrom(java.io.DataInputStream in)
                  throws java.io.IOException,
                         java.lang.IllegalAccessException,
                         java.lang.InstantiationException

Description copied from interface: `Streamable`
Read the state of the current object (including superclasses) from instream Note that the input stream must not be closed

Throws:
  `java.io.IOException`
  `java.lang.IllegalAccessException`
  `java.lang.InstantiationException`

#### size

    public int size()

Description copied from class: `Header`
To be implemented by subclasses. Return the size of this object for the serialized version of it. I.e. how many bytes this object takes when flattened into a buffer. This may be different for each instance, or can be the same. This may also just be an estimation. E.g. FRAG uses it on Message to determine whether or not to fragment the message. Fragmentation itself will be accurate, because the entire message will actually be serialized into a byte buffer, so we can determine the exact size.

Specified by:
  `size` in class `Header`

#### copy

    public NakAckHeader copy()

#### type2Str

    public static java.lang.String type2Str(byte t)

#### toString

    public java.lang.String toString()

Overrides:
  `toString` in class `Header`