Java Community | Help. Code. Learn.•9mo ago

Help with sending a packet

I am making a socket server and trying to send a Server -> Client packet but I am getting a

method ChiropteraServer#broadcast called with (Packet[id=4, data={0=abc, 1=asd}] (Packet)) threw a IllegalBlockingModeException: null

I tried a few stuff but I couldn't get it to work, one of the attempts is the one on github The sendPacket method: https://github.com/erenkarakal/Chiroptera/blob/master/src/main/java/me/eren/chiroptera/ChiropteraServer.java#L128

    public static void sendPacket(String clientIdentifier, Packet packet) {
        if (!isListening) return;

        SocketChannel client = authenticatedClients.get(clientIdentifier);
        if (client == null) return;

        try (OutputStream cos = client.socket().getOutputStream();
             ObjectOutputStream oos = new ObjectOutputStream(cos)) {

            client.configureBlocking(true);
            oos.writeObject(packet);
            client.configureBlocking(false);

        } catch (IOException e) {
            Chiroptera.getLog().warning("Error while sending a packet to " + getClientIdentifier(client) + ". " + e.getMessage());
        }
    }

    public static void sendPacket(String clientIdentifier, Packet packet) {
        if (!isListening) return;

        SocketChannel client = authenticatedClients.get(clientIdentifier);
        if (client == null) return;

        try (OutputStream cos = client.socket().getOutputStream();
             ObjectOutputStream oos = new ObjectOutputStream(cos)) {

            client.configureBlocking(true);
            oos.writeObject(packet);
            client.configureBlocking(false);

        } catch (IOException e) {
            Chiroptera.getLog().warning("Error while sending a packet to " + getClientIdentifier(client) + ". " + e.getMessage());
        }
    }

!!! ping me if you respond please !!!

4 Replies

JavaBot•9mo ago

    public static void sendPacket(String clientIdentifier, Packet packet) {

    public static void sendPacket(String clientIdentifier, Packet packet) {

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Kyo-chan•9mo ago

Have you tried leaving configureBlocking() alone?

eren.OP•9mo ago

you mean dont use it at all? i think i did but ill do it again yeah, same issue

    public static void sendPacket(String clientIdentifier, Packet packet) {
        if (!isListening) return;

        SocketChannel client = authenticatedClients.get(clientIdentifier);
        if (client == null) return;

        try (OutputStream cos = client.socket().getOutputStream();
             ObjectOutputStream oos = new ObjectOutputStream(cos)) {

            oos.writeObject(packet);

        } catch (IOException e) {
            Chiroptera.getLog().warning("Error while sending a packet to " + getClientIdentifier(client) + ". " + e.getMessage());
        }
    }

    public static void sendPacket(String clientIdentifier, Packet packet) {
        if (!isListening) return;

        SocketChannel client = authenticatedClients.get(clientIdentifier);
        if (client == null) return;

        try (OutputStream cos = client.socket().getOutputStream();
             ObjectOutputStream oos = new ObjectOutputStream(cos)) {

            oos.writeObject(packet);

        } catch (IOException e) {
            Chiroptera.getLog().warning("Error while sending a packet to " + getClientIdentifier(client) + ". " + e.getMessage());
        }
    }

fixed it with a code i 'borrowed' from an old stackoverflow post

    public static void sendPacket(String clientIdentifier, Packet packet) {
        if (!isListening) return;

        SocketChannel client = authenticatedClients.get(clientIdentifier);
        if (client == null) return;

        try {
            ByteBuffer buffer = ByteBuffer.wrap(packet.serialize());
            while (buffer.hasRemaining()) {
                client.write(buffer);
            }
        } catch (IOException e) {
            Chiroptera.getLog().warning("Error while sending data to client. " + e.getMessage());
        }
    }

    public static void sendPacket(String clientIdentifier, Packet packet) {
        if (!isListening) return;

        SocketChannel client = authenticatedClients.get(clientIdentifier);
        if (client == null) return;

        try {
            ByteBuffer buffer = ByteBuffer.wrap(packet.serialize());
            while (buffer.hasRemaining()) {
                client.write(buffer);
            }
        } catch (IOException e) {
            Chiroptera.getLog().warning("Error while sending data to client. " + e.getMessage());
        }
    }

JavaBot•9mo ago

Post Closed

This post has been closed by <@587604022349791274>.

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Help with sending a packet