Example usage for io.netty.util Attribute compareAndSet

Introduction

In this page you can find the example usage for io.netty.util Attribute compareAndSet.

Prototype

boolean compareAndSet(T oldValue, T newValue);

Source Link

Document

Atomically sets the value to the given updated value if the current value == the expected value.

Usage

From source file:at.yawk.dbus.protocol.codec.Local.java

/**
 * Generate a serial for the given channel.
 *///  ww w  .  j  a  v  a  2  s .  c om
static int generateSerial(ChannelHandlerContext ctx) {
    int serial;
    Attribute<Integer> attr = ctx.attr(LAST_SERIAL);
    Integer lastSerial;
    do {
        lastSerial = attr.get();
        serial = (lastSerial == null ? 0 : lastSerial) + 1;
        if (serial == 0) {
            serial = 1;
        }
    } while (!attr.compareAndSet(lastSerial, serial));
    return serial;
}

---

From source file:com.corundumstudio.socketio.handler.EncoderHandler.java

License:Apache License

private void handleHTTP(OutPacketMessage msg, ChannelHandlerContext ctx) throws IOException {
    Channel channel = ctx.channel();
    Attribute<Boolean> attr = channel.attr(WRITE_ONCE);

    Queue<Packet> queue = msg.getClientHead().getPacketsQueue(msg.getTransport());

    if (!channel.isActive() || queue.isEmpty() || !attr.compareAndSet(null, true)) {
        return;//w w w .j  a  v a  2  s  .  c  o m
    }

    ByteBuf out = encoder.allocateBuffer(ctx.alloc());
    Boolean b64 = ctx.channel().attr(EncoderHandler.B64).get();
    if (b64 != null && b64) {
        Integer jsonpIndex = ctx.channel().attr(EncoderHandler.JSONP_INDEX).get();
        encoder.encodeJsonP(jsonpIndex, queue, out, ctx.alloc(), 50);
        String type = "application/javascript";
        if (jsonpIndex == null) {
            type = "text/plain";
        }
        sendMessage(msg, channel, out, type);
    } else {
        encoder.encodePackets(queue, out, ctx.alloc(), 50);
        sendMessage(msg, channel, out, "application/octet-stream");
    }
}

---

From source file:com.dinstone.rpc.netty.client.SessionUtil.java

License:Apache License

@SuppressWarnings("unchecked")
public static Map<Integer, CallFuture> getCallFutureMap(Channel session) {
    Attribute<Object> attr = session.attr(CALL_KEY);
    Map<Integer, CallFuture> cfMap = (Map<Integer, CallFuture>) attr.get();
    if (cfMap == null) {
        cfMap = new ConcurrentHashMap<Integer, CallFuture>();
        if (!attr.compareAndSet(null, cfMap)) {
            cfMap = (Map<Integer, CallFuture>) attr.get();
        }//from  w  ww. j  a va 2 s . c  om
    }

    return cfMap;
}

---