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 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.protocols;

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

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
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;}

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

    @Override
    public void writeTo(DataOutput out) throws IOException {
        out.writeByte(type);
    }

    @Override
    public void readFrom(DataInput in) throws IOException {
        type=in.readByte();
    }

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