Package org.jgroups.protocols

Class PrioHeader

java.lang.Object
org.jgroups.Header
org.jgroups.protocols.PrioHeader
All Implemented Interfaces:
Streamable
public class PrioHeader extends Header
This Header class is used in conjunction with the PRIO protocol to prioritize message sending/receiving Priority values are from 0 to 255 where 0 is the highest priority Example of setting a message priority: // Create a message to send to everyone Message message = new Message( null, null, messagePayload ); // Add the priority protocol header PrioHeader header = new PrioHeader( 1 ); short protocolId = ClassConfigurator.getProtocolId(PRIO.class); message.putHeader( protocolId, header);
Author:
Michael Earl

  • Constructor Details

    • PrioHeader

      public PrioHeader()

    • PrioHeader

      public PrioHeader(byte priority)

  • Method Details

    • getPriority

      public byte getPriority()

    • setPriority

      public void setPriority(byte priority)

    • 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

    • writeTo

      public void writeTo(DataOutputStream outstream) throws 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:
      IOException

    • readFrom

      public void readFrom(DataInputStream instream) throws IOException, IllegalAccessException, 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:
      IOException
      IllegalAccessException
      InstantiationException

    • toString

      public String toString()
      Overrides:
      toString in class Header