org.jgroups.protocols.FcHeader Maven / Gradle / Ivy

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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging 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.protocols;

import org.jgroups.Global;
import org.jgroups.Header;

import java.io.DataInput;
import java.io.DataOutput;
import java.util.function.Supplier;

/**
 * Header used by various flow control protocols
 * @author Bela Ban
 */
public class FcHeader extends Header {
    public static final byte REPLENISH=1;
    public static final byte CREDIT_REQUEST=2; // the sender of the message is the requester

    byte type=REPLENISH;

    public FcHeader() {

    }

    public FcHeader(byte type) {
        this.type=type;
    }

    public Supplier create() {
        return FcHeader::new;
    }

    public short getMagicId() {return 59;}

    public int serializedSize() {
        return Global.BYTE_SIZE;
    }

    public void writeTo(DataOutput out) throws Exception {
        out.writeByte(type);
    }

    public void readFrom(DataInput in) throws Exception {
        type=in.readByte();
    }

    public String toString() {
        switch(type) {
            case REPLENISH:
                return "REPLENISH";
            case CREDIT_REQUEST:
                return "CREDIT_REQUEST";
            default:
                return "";
        }
    }
}