Examples with PlcRequestContainer org.apache.plc4x.java.spi.messages.PlcRequestContainer used on opensource projects

Example 1 with PlcRequestContainer

use of org.apache.plc4x.java.spi.messages.PlcRequestContainer in project plc4x by apache.

the class Plc4XDf1Protocol method decode.

@Override
protected void decode(ChannelHandlerContext ctx, DF1Symbol msg, List<Object> out) throws Exception {
    logger.debug("Received DF1 Command incoming {}", msg);
    if (msg instanceof DF1SymbolMessageFrameNAK) {
        logger.warn("Received a response NAK, notify all requests");
        for (Map.Entry<Integer, PlcRequestContainer> entry : requests.entrySet()) {
            entry.getValue().getResponseFuture().complete(new DefaultPlcReadResponse((PlcReadRequest) entry.getValue().getRequest(), Collections.singletonMap("erster", new ResponseItem<>(PlcResponseCode.INTERNAL_ERROR, new PlcDINT(-1)))));
        }
        return;
    } else if (msg instanceof DF1SymbolMessageFrameACK) {
        logger.warn("Received a response ACK :D");
        return;
    }
    assert msg instanceof DF1SymbolMessageFrame;
    DF1Command command = ((DF1SymbolMessageFrame) msg).getCommand();
    int transactionId = command.getTransactionCounter();
    if (!requests.containsKey(transactionId)) {
        logger.warn("Received a response to unknown transaction id {}", transactionId);
        ctx.fireExceptionCaught(new RuntimeException("Received a response to unknown transaction id"));
        ctx.close();
        return;
    }
    // As every response has a matching request, get this request based on the tpdu.
    PlcRequestContainer requestContainer = requests.remove(transactionId);
    PlcRequest request = requestContainer.getRequest();
    // Handle the response.
    PlcResponse response = null;
    if (request instanceof PlcReadRequest) {
        /*
            Things to do
            - check response code (if there is something like that?
            - cast the bytes to right datatype
            - create Response
             */
        // We can do this as we have only one fieldName in DF1
        final String fieldName = ((PlcReadRequest) request).getFieldNames().iterator().next();
        // TODO can there be another code than ok?
        final PlcResponseCode responseCode = PlcResponseCode.OK;
        // TODO maybe check for different status bytes
        final Df1Field field = (Df1Field) ((PlcReadRequest) request).getField(fieldName);
        // Cast byte and create response item
        PlcValue responseItem = null;
        byte[] data = ((DF1UnprotectedReadResponse) command).getData();
        switch(field.getDataType()) {
            case BIT:
                break;
            case INTEGER:
                // TODO: type conversion is untested
                responseItem = new PlcDINT((int) data[0] + ((int) data[1] << 8));
                break;
            case FLOAT:
                break;
            case BIT_STRING:
                break;
            case ARRAY:
                break;
            // TODO add all other cases here...
            default:
                throw new NotImplementedException("The DataType " + field.getDataType() + " is currently not implemented!");
        }
        response = new DefaultPlcReadResponse(((PlcReadRequest) request), Collections.singletonMap(fieldName, new ResponseItem<>(responseCode, responseItem)));
    } else if (request instanceof PlcWriteRequest) {
        logger.warn("Writing is currently not implemented but received a write response?!");
        ctx.close();
        throw new NotImplementedException("This is currently not implemented!");
    }
    // Confirm the response being handled.
    if (response != null) {
        requestContainer.getResponseFuture().complete(response);
    }
}

Example 2 with PlcRequestContainer

use of org.apache.plc4x.java.spi.messages.PlcRequestContainer in project plc4x by apache.

the class Plc4xAbEthProtocol method decode.

@Override
protected void decode(ChannelHandlerContext ctx, CIPEncapsulationPacket packet, List<Object> out) throws Exception {
    logger.trace("Received {}, decoding...", packet);
    if (packet instanceof CIPEncapsulationConnectionResponse) {
        CIPEncapsulationConnectionResponse connectionResponse = (CIPEncapsulationConnectionResponse) packet;
        // Save the session handle
        sessionHandle = connectionResponse.getSessionHandle();
        // Tell Netty we're finished connecting
        ctx.channel().pipeline().fireUserEventTriggered(new ConnectedEvent());
    } else {
        // We're currently just expecting responses.
        if (!(packet instanceof CIPEncapsulationReadResponse)) {
            return;
        }
        CIPEncapsulationReadResponse cipResponse = (CIPEncapsulationReadResponse) packet;
        int transactionCounter = cipResponse.getResponse().getTransactionCounter();
        if (!requests.containsKey(transactionCounter)) {
            ctx.fireExceptionCaught(new PlcProtocolException("Couldn't find request for response with transaction counter " + transactionCounter));
            return;
        }
        PlcRequestContainer requestContainer = requests.remove(transactionCounter);
        PlcRequest request = requestContainer.getRequest();
        PlcResponse response = null;
        if (request instanceof PlcReadRequest) {
            response = decodeReadResponse(cipResponse, requestContainer);
        } else {
            ctx.fireExceptionCaught(new PlcProtocolException("Unsupported request type " + request.getClass().getName()));
        }
        // Confirm the response being handled.
        if (response != null) {
            requestContainer.getResponseFuture().complete(response);
        }
    }
}