use of org.apache.plc4x.java.df1.field.Df1Field in project plc4x by apache.
the class Plc4XDf1Protocol method encode.
@Override
protected void encode(ChannelHandlerContext ctx, PlcRequestContainer msg, List<Object> out) throws Exception {
logger.trace("Received Request {} to send out", msg);
if (msg.getRequest() instanceof PlcReadRequest) {
for (PlcField field : ((PlcReadRequest) msg.getRequest()).getFields()) {
if (!(field instanceof Df1Field)) {
throw new IllegalArgumentException("Invalid field type found inside Df1 Request");
}
int address = ((Df1Field) field).getAddress();
short size = ((Df1Field) field).getDataType().getLength();
int transactionId = this.transactionId.getAndIncrement();
while (((transactionId & 0xFF) == 0x10) || (((transactionId >>> 8) & 0xFF) == 0x10)) {
// prevent that one of the transactionID bytes is 0x10, which has to be escaped by double 0x10 and makes life a lot harder
transactionId = this.transactionId.getAndIncrement();
}
logger.debug("Creating request for offset {}, with length {} and transaction id {}", address, size, transactionId);
requests.put(transactionId, msg);
switch(((Df1Field) field).getAddress_type()) {
case OFFSET:
out.add(new DF1UnprotectedReadRequest((short) 0x00, (short) transactionId, address, size));
break;
case LOGICAL:
// TODO: add 'protected typed logical read' to mspec
throw new NotImplementedException("not yet implemented in mspec");
}
}
} else {
throw new IllegalStateException("This should not happen!");
}
}
use of org.apache.plc4x.java.df1.field.Df1Field 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);
}
}
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