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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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package org.jgroups;

import org.jgroups.util.Streamable;

/**
 * Header is a JGroups internal base class for all JGroups headers. Client normally do not need to
 * interact with headers unless they are developing their custom protocols.
 * 
 * @author Bela Ban
 * @since 2.0
 */
public abstract class Header implements Streamable {


    /**
     * 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.
     */
    public abstract int size();



    public String toString() {
        return '[' + getClass().getSimpleName() + "]";
    }

}