org.jgroups

Class Header

Implemented Interfaces:
Cloneable, Externalizable
Known Direct Subclasses:
BSH.BshHeader, CAUSAL.CausalHeader, COMPRESS.CompressHeader, DenyResponseHeader, ENCRYPT1_4.EncryptHeader, FC.FcHeader, FD.FdHeader, FD_PID.FdHeader, FD_PROB.FdHeader, FD_SIMPLE.FdHeader, FD_SOCK.FdHeader, FRAG.FragHeader, FRAG2.FragHeader, GMS.GmsHeader, LeaseInfoReplicationHeader, LeaseRequestHeader, LeaseResponseHeader, MERGE.MergeHeader, MERGEFAST.MergefastHeader, NakAckHeader, NakAckHeader, PARTITIONER.PartitionerHeader, PbcastHeader, PerfHeader, PingHeader, PIGGYBACK.PiggybackHeader, PullPushAdapter.PullHeader, RequestCorrelator.Header, SMACK.SmackHeader, STABLE.StableHeader, STATE_TRANSFER.StateHeader, TcpHeader, TOTAL.Header, TOTAL_OLD.TotalHeader, TOTAL_TOKEN.RingTokenHeader, TOTAL_TOKEN.TotalTokenHeader, TunnelHeader, UdpHeader, UNICAST.UnicastHeader, VERIFY_SUSPECT.VerifyHeader, WANPIPE.WanPipeHeader

public abstract class Header
extends java.lang.Object
implements Externalizable, Cloneable

Abstract base class for all headers to be added to a Message.
Author:
Bela Ban, bela@nms.fnc.fujitsu.com

Field Summary

static long
HDR_OVERHEAD

Constructor Summary

Header()

Method Summary

long
size()
To be implemented by subclasses.
String
toString()

Field Details

HDR_OVERHEAD

public static final long HDR_OVERHEAD
Field Value:
255L

Constructor Details

Header

public Header()

Method Details

size

public long 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()

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