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package org.jgroups;

import org.jgroups.annotations.Experimental;
import org.jgroups.util.RefcountImpl;

import java.nio.ByteBuffer;
import java.util.function.Consumer;

/**
 * Ref-counted message implementation.

 * Note that this class is experimental and may get removed without notice. The point of it is to get experience with
 * ref counted messages and see if they're needed or not.

 * See https://issues.redhat.com/browse/JGRP-2417 for details
 * @author Bela Ban
 * @since  5.1.0
 */
@Experimental
public class RefcountedNioMessage extends NioMessage implements Refcountable {
    protected final RefcountImpl impl=new RefcountImpl<>();

    public RefcountedNioMessage() {
    }

    public RefcountedNioMessage(Address dest) {
        super(dest);
    }

    public RefcountedNioMessage(Address dest, ByteBuffer buf) {
        super(dest, buf);
    }

    public synchronized byte getRefcount() {
        return impl.getRefcount();
    }

    @Override public synchronized RefcountedNioMessage incr() {
        impl.incr();
        return this;
    }

    @Override public synchronized RefcountedNioMessage decr() {
        impl.decr(this);
        return this;
    }

    public RefcountedNioMessage onRelease(Consumer rc) {
        impl.onRelease(rc);
        return this;
    }

    @Override
    public String toString() {
        return String.format("%s (refcnt=%d)", super.toString(), impl.getRefcount());
    }

}