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

Example 1 with DefaultPlcReadRequest

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

the class OpcuaOptimizer method processReadRequest.

@Override
protected List<PlcRequest> processReadRequest(PlcReadRequest readRequest, DriverContext driverContext) {
    List<PlcRequest> processedRequests = new LinkedList<>();
    // List of all items in the current request.
    LinkedHashMap<String, PlcField> curFields = new LinkedHashMap<>();
    for (String fieldName : readRequest.getFieldNames()) {
        OpcuaField field = (OpcuaField) readRequest.getField(fieldName);
        curFields.put(fieldName, field);
    }
    // Create a new PlcReadRequest from the remaining field items.
    if (!curFields.isEmpty()) {
        processedRequests.add(new DefaultPlcReadRequest(((DefaultPlcReadRequest) readRequest).getReader(), curFields));
    }
    return processedRequests;
}

Example 2 with DefaultPlcReadRequest

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

the class SingleFieldOptimizer method processReadRequest.

@Override
protected List<PlcRequest> processReadRequest(PlcReadRequest readRequest, DriverContext driverContext) {
    if (readRequest.getNumberOfFields() == 1) {
        return Collections.singletonList(readRequest);
    }
    List<PlcRequest> subRequests = new ArrayList<>(readRequest.getNumberOfFields());
    for (String fieldName : readRequest.getFieldNames()) {
        PlcField field = readRequest.getField(fieldName);
        PlcReadRequest subRequest = new DefaultPlcReadRequest(((DefaultPlcReadRequest) readRequest).getReader(), new LinkedHashMap<>(Collections.singletonMap(fieldName, field)));
        subRequests.add(subRequest);
    }
    return subRequests;
}

Example 3 with DefaultPlcReadRequest

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

the class ModbusProtocolLogic method read.

@Override
public CompletableFuture<PlcReadResponse> read(PlcReadRequest readRequest) {
    CompletableFuture<PlcReadResponse> future = new CompletableFuture<>();
    DefaultPlcReadRequest request = (DefaultPlcReadRequest) readRequest;
    // Example for sending a request ...
    if (request.getFieldNames().size() == 1) {
        String fieldName = request.getFieldNames().iterator().next();
        ModbusField field = (ModbusField) request.getField(fieldName);
        final ModbusPDU requestPdu = getReadRequestPdu(field);
        int transactionIdentifier = transactionIdentifierGenerator.getAndIncrement();
        // If we've reached the max value for a 16 bit transaction identifier, reset back to 1
        if (transactionIdentifierGenerator.get() == 0xFFFF) {
            transactionIdentifierGenerator.set(1);
        }
        ModbusTcpADU modbusTcpADU = new ModbusTcpADU(transactionIdentifier, unitIdentifier, requestPdu, false);
        RequestTransactionManager.RequestTransaction transaction = tm.startRequest();
        transaction.submit(() -> context.sendRequest(modbusTcpADU).expectResponse(ModbusTcpADU.class, requestTimeout).onTimeout(future::completeExceptionally).onError((p, e) -> future.completeExceptionally(e)).check(p -> ((p.getTransactionIdentifier() == transactionIdentifier) && (p.getUnitIdentifier() == unitIdentifier))).unwrap(ModbusTcpADU::getPdu).handle(responsePdu -> {
            // Try to decode the response data based on the corresponding request.
            PlcValue plcValue = null;
            PlcResponseCode responseCode;
            // Check if the response was an error response.
            if (responsePdu instanceof ModbusPDUError) {
                ModbusPDUError errorResponse = (ModbusPDUError) responsePdu;
                responseCode = getErrorCode(errorResponse);
            } else {
                try {
                    plcValue = toPlcValue(requestPdu, responsePdu, field.getDataType());
                    responseCode = PlcResponseCode.OK;
                } catch (ParseException e) {
                    // Add an error response code ...
                    responseCode = PlcResponseCode.INTERNAL_ERROR;
                }
            }
            // Prepare the response.
            PlcReadResponse response = new DefaultPlcReadResponse(request, Collections.singletonMap(fieldName, new ResponseItem<>(responseCode, plcValue)));
            // Pass the response back to the application.
            future.complete(response);
            // Finish the request-transaction.
            transaction.endRequest();
        }));
    } else {
        future.completeExceptionally(new PlcRuntimeException("Modbus only supports single filed requests"));
    }
    return future;
}

Example 4 with DefaultPlcReadRequest

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

the class S7ProtocolLogic method read.

@Override
public CompletableFuture<PlcReadResponse> read(PlcReadRequest readRequest) {
    DefaultPlcReadRequest request = (DefaultPlcReadRequest) readRequest;
    List<S7VarRequestParameterItem> requestItems = new ArrayList<>(request.getNumberOfFields());
    for (PlcField field : request.getFields()) {
        requestItems.add(new S7VarRequestParameterItemAddress(encodeS7Address(field)));
    }
    // Create a read request template.
    // tpuId will be inserted before sending in #readInternal so we insert -1 as dummy here
    final S7MessageRequest s7MessageRequest = new S7MessageRequest(-1, new S7ParameterReadVarRequest(requestItems), null);
    // Just send a single response and chain it as Response
    return toPlcReadResponse(readRequest, readInternal(s7MessageRequest));
}

Example 5 with DefaultPlcReadRequest

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

the class S7Optimizer method processReadRequest.

@Override
protected List<PlcRequest> processReadRequest(PlcReadRequest readRequest, DriverContext driverContext) {
    S7DriverContext s7DriverContext = (S7DriverContext) driverContext;
    List<PlcRequest> processedRequests = new LinkedList<>();
    // This calculates the size of the header for the request and response.
    int curRequestSize = EMPTY_READ_REQUEST_SIZE;
    // An empty response has the same size as an empty request.
    int curResponseSize = EMPTY_READ_RESPONSE_SIZE;
    // List of all items in the current request.
    LinkedHashMap<String, PlcField> curFields = new LinkedHashMap<>();
    for (String fieldName : readRequest.getFieldNames()) {
        S7Field field = (S7Field) readRequest.getField(fieldName);
        int readRequestItemSize = S7_ADDRESS_ANY_SIZE;
        int readResponseItemSize = 4 + (field.getNumberOfElements() * field.getDataType().getSizeInBytes());
        // If it's an odd number of bytes, add one to make it even
        if (readResponseItemSize % 2 == 1) {
            readResponseItemSize++;
        }
        // If adding the item would not exceed the sizes, add it to the current request.
        if (((curRequestSize + readRequestItemSize) <= s7DriverContext.getPduSize()) && ((curResponseSize + readResponseItemSize) <= s7DriverContext.getPduSize())) {
            // Increase the current request sizes.
            curRequestSize += readRequestItemSize;
            curResponseSize += readResponseItemSize;
        // Add the item.
        } else // If they would exceed, start a new request.
        {
            // Create a new PlcReadRequest containing the current field item.
            processedRequests.add(new DefaultPlcReadRequest(((DefaultPlcReadRequest) readRequest).getReader(), curFields));
            // Reset the size and item lists.
            curRequestSize = EMPTY_READ_REQUEST_SIZE + readRequestItemSize;
            curResponseSize = EMPTY_READ_RESPONSE_SIZE + readResponseItemSize;
            curFields = new LinkedHashMap<>();
            // Splitting of huge fields not yet implemented, throw an exception instead.
            if (((curRequestSize + readRequestItemSize) > s7DriverContext.getPduSize()) && ((curResponseSize + readResponseItemSize) > s7DriverContext.getPduSize())) {
                throw new PlcRuntimeException("Field size exceeds maximum payload for one item.");
            }
        }
        curFields.put(fieldName, field);
    }
    // Create a new PlcReadRequest from the remaining field items.
    if (!curFields.isEmpty()) {
        processedRequests.add(new DefaultPlcReadRequest(((DefaultPlcReadRequest) readRequest).getReader(), curFields));
    }
    return processedRequests;
}