DefaultAddressedEnvelope Class — netty Architecture

Source Code

transport/src/main/java/io/netty/channel/DefaultAddressedEnvelope.java lines 32–129

public class DefaultAddressedEnvelope<M, A extends SocketAddress> implements AddressedEnvelope<M, A> {

    private final M message;
    private final A sender;
    private final A recipient;

    /**
     * Creates a new instance with the specified {@code message}, {@code recipient} address, and
     * {@code sender} address.
     */
    public DefaultAddressedEnvelope(M message, A recipient, A sender) {
        ObjectUtil.checkNotNull(message, "message");
        if (recipient == null && sender == null) {
            throw new NullPointerException("recipient and sender");
        }

        this.message = message;
        this.sender = sender;
        this.recipient = recipient;
    }

    /**
     * Creates a new instance with the specified {@code message} and {@code recipient} address.
     * The sender address becomes {@code null}.
     */
    public DefaultAddressedEnvelope(M message, A recipient) {
        this(message, recipient, null);
    }

    @Override
    public M content() {
        return message;
    }

    @Override
    public A sender() {
        return sender;
    }

    @Override
    public A recipient() {
        return recipient;
    }

    @Override
    public int refCnt() {
        if (message instanceof ReferenceCounted) {
            return ((ReferenceCounted) message).refCnt();
        } else {
            return 1;
        }
    }

    @Override
    public AddressedEnvelope<M, A> retain() {
        ReferenceCountUtil.retain(message);
        return this;
    }

    @Override
    public AddressedEnvelope<M, A> retain(int increment) {
        ReferenceCountUtil.retain(message, increment);
        return this;
    }

    @Override
    public boolean release() {
        return ReferenceCountUtil.release(message);
    }

    @Override
    public boolean release(int decrement) {
        return ReferenceCountUtil.release(message, decrement);
    }

    @Override
    public AddressedEnvelope<M, A> touch() {
        ReferenceCountUtil.touch(message);
        return this;
    }