Package org.jgroups

Class Header

java.lang.Object
org.jgroups.Header
All Implemented Interfaces:
Streamable
Direct Known Subclasses:
AuthHeader, COMPRESS.CompressHeader, DAISYCHAIN.DaisyHeader, DISCARD.DiscardHeader, ENCRYPT.EncryptHeader, Executing.ExecutorHeader, FcHeader, FD_ALL.HeartbeatHeader, FD_SIMPLE.FdHeader, FD_SOCK.FdHeader, FD.FdHeader, FLUSH.FlushHeader, FragHeader, GMS.GmsHeader, HTOTAL.HTotalHeader, Locking.LockingHeader, MERGE3.CoordAnnouncement, MERGEFAST.MergefastHeader, MuxHeader, MuxHeader, NakAckHeader, PingHeader, PrioHeader, PullPushAdapter.PullHeader, RELAY.RelayHeader, RequestCorrelator.Header, SCOPE.ScopeHeader, SEQUENCER.SequencerHeader, SFC.Header, SMACK.SmackHeader, STABLE.StableHeader, STATE_TRANSFER.StateHeader, STOMP.StompHeader, STREAMING_STATE_TRANSFER.StateHeader, TpHeader, UNICAST.UnicastHeader, UNICAST2.Unicast2Header, VERIFY_SUSPECT.VerifyHeader, VIEW_SYNC.ViewSyncHeader
public abstract class Header extends Object implements Streamable
Abstract base class for all headers to be added to a Message.
Author:
Bela Ban

  • Constructor Details

    • Header

      public Header()

  • Method Details

    • size

      public abstract 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