Example usage for io.netty.handler.codec DecoderException DecoderException

Introduction

In this page you can find the example usage for io.netty.handler.codec DecoderException DecoderException.

Prototype

public DecoderException() 

Source Link

Document

Creates a new instance.

Usage

From source file:net.epsilony.utils.codec.modbus.func.ReadBooleanRegistersFunction.java

License:Open Source License

@Override
public void decodeResponseData(ByteBuf data, ModbusResponse response) {

    if (data.readableBytes() < getResponseDataLength()) {
        throw new DecoderException();
    }/*from w  w w  .  j ava 2s .  c om*/

    ReadBooleanRegistersResponse readBooleanRegistersResponse = (ReadBooleanRegistersResponse) response;
    readBooleanRegistersResponse.setStartingAddress(startingAddress);

    int dataContentBytes = data.readUnsignedByte();
    if (dataContentBytes != getResponseDataLength() - 1) {
        throw new DecoderException();
    }
    readBooleanRegistersResponse.setQuantityAndAllocate(quantity);
    int dataByte = 0;
    int mask = 0;
    for (int i = 0; i < quantity; i++) {
        if (i % 8 == 0) {
            dataByte = data.readUnsignedByte();
            mask = 1;
        }
        readBooleanRegistersResponse.setValue(i, (mask & dataByte) != 0);
        mask <<= 1;
    }

}

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From source file:net.epsilony.utils.codec.modbus.func.ReadRegistersFunction.java

License:Open Source License

@Override
public void decodeRequestData(ByteBuf data) {
    if (data.readableBytes() < 4) {
        throw new DecoderException();
    }/* w w  w  . j  a  v  a  2  s .  c  o m*/
    startingAddress = data.readUnsignedShort();
    setQuantity(data.readUnsignedShort());
}

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From source file:net.epsilony.utils.codec.modbus.func.ReadWordRegistersFunction.java

License:Open Source License

@Override
public void decodeResponseData(ByteBuf data, ModbusResponse response) {
    if (data.readableBytes() < getResponseDataLength()) {
        throw new DecoderException();
    }/*  w  ww .j a  va2  s  .  c o  m*/

    ReadWordRegistersResponse readWordRegistersResponse = (ReadWordRegistersResponse) response;

    readWordRegistersResponse.setStartingAddress(startingAddress);

    int dataContentBytes = data.readUnsignedByte();
    if (dataContentBytes != getResponseDataLength() - 1) {
        throw new DecoderException();
    }

    readWordRegistersResponse.setQuantityAndAllocate(quantity);
    for (int i = 0; i < quantity; i++) {
        readWordRegistersResponse.setValue(i, data.readUnsignedShort());
    }
}

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From source file:net.epsilony.utils.codec.modbus.handler.ModbusMasterResponseDecoder.java

License:Open Source License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
    if (in.readableBytes() < 6) {
        return;// www .  j  a v  a2s. c  o  m
    }
    int adupLength = in.getUnsignedShort(in.readerIndex() + 4);
    int wholeLength = adupLength + 6 + (withCheckSum ? 2 : 0);
    if (wholeLength > in.readableBytes()) {
        return;
    }
    if (withCheckSum) {
        checkSum(in, wholeLength);
    }
    int transectionId = in.readUnsignedShort();
    ModbusRequest request = transectingRequestRetriever.apply(transectionId);
    if (null == request) {
        in.readerIndex(in.readerIndex() + wholeLength - 2);
        out.add(new MissMatchResponse(transectionId));
        return;
    }
    in.readerIndex(in.readerIndex() + 4);
    int unitId = in.readUnsignedByte();
    if (unitId != request.getUnitId()) {
        throw new DecoderException();
    }
    int functionCode = in.readUnsignedByte();
    if ((functionCode & 0x7F) != request.getFunction().getCode()) {
        throw new DecoderException();
    }

    ModbusResponse response;

    if ((functionCode & 0x80) == 0) {
        switch (functionCode) {
        case 0x01: {
            ReadBooleanRegistersResponse bResponse = new ReadBooleanRegistersResponse();
            bResponse.setRegisterType(ModbusRegisterType.COIL);
            response = bResponse;
        }
            break;
        case 0x02: {
            ReadBooleanRegistersResponse bResponse = new ReadBooleanRegistersResponse();
            bResponse.setRegisterType(ModbusRegisterType.DISCRETE_INPUT);
            response = bResponse;
        }
            break;
        case 0x03: {
            ReadWordRegistersResponse rResponse = new ReadWordRegistersResponse();
            rResponse.setRegisterType(ModbusRegisterType.HOLDING);
            response = rResponse;
            break;
        }
        case 0x04: {
            ReadWordRegistersResponse rResponse = new ReadWordRegistersResponse();
            rResponse.setRegisterType(ModbusRegisterType.INPUT);
            response = rResponse;
        }
            break;
        case 0x05:
            response = new WriteCoilResponse();
            break;
        case 0x06:
            response = new WriteHoldingResponse();
            break;
        default:
            throw new UnsupportedFunctionCodeException();
        }
        request.getFunction().decodeResponseData(in, response);
    } else {
        ExceptionResponse exResponse = new ExceptionResponse();
        exResponse.setFunctionCode(functionCode);
        exResponse.setExceptionCode(in.readUnsignedByte());
        response = exResponse;
    }
    response.setTransectionId(transectionId);
    response.setUnitId(unitId);

    out.add(response);

    if (withCheckSum) {
        in.readerIndex(in.readerIndex() + 2);
    }

}

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