Package org.jgroups

Class Header

java.lang.Object
org.jgroups.Header
All Implemented Interfaces:
Externalizable, Serializable
Direct Known Subclasses:
AuthHeader, BSH.BshHeader, CAUSAL.CausalHeader, CAUSAL.CausalNewViewHeader, COMPRESS.CompressHeader, DISCARD.DiscardHeader, ENCRYPT.EncryptHeader, FC.FcHeader, FD_ALL.Header, FD_SIMPLE.FdHeader, FD_SOCK.FdHeader, FD.FdHeader, FLUSH.FlushHeader, FragHeader, GMS.GmsHeader, HTOTAL.HTotalHeader, MERGE3.CoordAnnouncement, MERGEFAST.MergefastHeader, MuxHeader, NakAckHeader, PingHeader, PullPushAdapter.PullHeader, RequestCorrelator.Header, SEQUENCER.SequencerHeader, SFC.Header, SMACK.SmackHeader, STABLE.StableHeader, STATE_TRANSFER.StateHeader, STREAMING_STATE_TRANSFER.StateHeader, TcpHeader, TpHeader, TunnelHeader, UdpHeader, UNICAST.UnicastHeader, VERIFY_SUSPECT.VerifyHeader, VIEW_SYNC.ViewSyncHeader

public abstract class Header extends Object implements Externalizable
Abstract base class for all headers to be added to a Message.
Author:
Bela Ban
See Also:
  • Field Details

  • Constructor Details

    • Header

      public Header()
  • Method Details

    • size

      public int size()
      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.
    • toString

      public String toString()
      Overrides:
      toString in class Object