Examples with Channel io.openems.api.channel.Channel used on opensource projects

Example 11 with Channel

use of io.openems.api.channel.Channel in project openems by OpenEMS.

the class FeneconMiniEss method defineModbusProtocol.

/*
	 * Methods
	 */
@Override
protected ModbusProtocol defineModbusProtocol() throws ConfigException {
    ModbusProtocol protokol = new ModbusProtocol(new // 
    ModbusRegisterRange(// 
    100, new // 
    UnsignedWordElement(// 
    100, systemState = // 
    new ModbusReadLongChannel("SystemState", this).label(0, // 
    STANDBY).label(1, // 
    "Start Off-Grid").label(2, // 
    START).label(3, // 
    FAULT).label(4, "Off-grid PV")), new // 
    UnsignedWordElement(// 
    101, controlMode = // 
    new ModbusReadLongChannel("ControlMode", this).label(1, // 
    "Remote").label(2, // 
    "Local")), // 
    new DummyElement(102, 103), new // 
    UnsignedDoublewordElement(// 
    104, totalBatteryChargeEnergy = new ModbusReadLongChannel("TotalBatteryChargeEnergy", this).unit(// 
    "Wh")), new // 
    UnsignedDoublewordElement(// 
    106, totalBatteryDischargeEnergy = new ModbusReadLongChannel("TotalBatteryDischargeEnergy", this).unit(// 
    "Wh")), new // 
    UnsignedWordElement(// 
    108, batteryGroupState = // 
    new ModbusReadLongChannel("BatteryGroupState", this).label(0, // 
    "Initial").label(1, // 
    "Stop").label(2, // 
    "Starting").label(3, // 
    "Running").label(4, // 
    "Stopping").label(5, "Fail")), new // 
    UnsignedWordElement(// 
    109, soc = new ModbusReadLongChannel("Soc", this).unit("%").interval(0, 100)), new // 
    UnsignedWordElement(// 
    110, batteryVoltage = new ModbusReadLongChannel("BatteryVoltage", this).unit("mV").multiplier(2)), new // 
    SignedWordElement(// 
    111, batteryCurrent = new ModbusReadLongChannel("BatteryCurrent", this).unit("mA").multiplier(2)), new // 
    SignedWordElement(// 
    112, batteryPower = new ModbusReadLongChannel("BatteryPower", this).unit("W")), new // 
    UnsignedWordElement(// 
    113, // 
    new ModbusBitWrappingChannel("BatteryGroupAlarm", this, this.thingState).warningBit(0, // 
    WarningEss.FailTheSystemShouldBeStopped).warningBit(1, // 
    WarningEss.CommonLowVoltageAlarm).warningBit(2, // 
    WarningEss.CommonHighVoltageAlarm).warningBit(3, // 
    WarningEss.ChargingOverCurrentAlarm).warningBit(4, // 
    WarningEss.DischargingOverCurrentAlarm).warningBit(5, // 
    WarningEss.OverTemperatureAlarm).warningBit(6, // 
    WarningEss.InteralCommunicationAbnormal)), new // 
    UnsignedWordElement(// 
    114, pcsOperationState = new ModbusReadLongChannel("PcsOperationState", this).label(0, // 
    "Self-checking").label(1, // 
    "Standby").label(2, // 
    "Off grid PV").label(3, // 
    "Off grid").label(4, // 
    ON_GRID).label(5, // 
    "Fail").label(6, // 
    "bypass 1").label(7, "bypass 2")), // 
    new DummyElement(115, 117), new // 
    SignedWordElement(// 
    118, current = new ModbusReadLongChannel("Current", this).unit("mA").multiplier(2)), new DummyElement(119, 120), new // 
    UnsignedWordElement(// 
    121, voltage = new ModbusReadLongChannel("Voltage", this).unit("mV").multiplier(2)), new DummyElement(122, 123), new // 
    SignedWordElement(// 
    124, activePower = new ModbusReadLongChannel("ActivePower", this).unit("W")), new DummyElement(125, 126), new // 
    SignedWordElement(// 
    127, reactivePower = new ModbusReadLongChannel("ReactivePower", this).unit("var")), new DummyElement(128, 130), new // 
    UnsignedWordElement(// 
    131, frequency = new ModbusReadLongChannel("Frequency", this).unit("mHz").multiplier(1)), new DummyElement(132, 133), new // 
    UnsignedWordElement(// 
    134, phaseAllowedApparent = new ModbusReadLongChannel("PhaseAllowedApparentPower", this).unit("VA")), new DummyElement(135, 140), new // 
    UnsignedWordElement(// 
    141, allowedCharge = new ModbusReadLongChannel("AllowedCharge", this).unit("W").negate()), new // 
    UnsignedWordElement(// 
    142, allowedDischarge = new ModbusReadLongChannel("AllowedDischarge", this).unit("W")), new DummyElement(143, 149), new // 
    UnsignedWordElement(// 
    150, // 
    new ModbusBitWrappingChannel("PcsAlarm1", this, this.thingState).warningBit(0, // 
    WarningEss.GridUndervoltage).warningBit(1, // 
    WarningEss.GridOvervoltage).warningBit(2, // 
    WarningEss.GridUnderFrequency).warningBit(3, // 
    WarningEss.GridOverFrequency).warningBit(4, // 
    WarningEss.GridPowerSupplyOff).warningBit(5, // 
    WarningEss.GridConditionUnmeet).warningBit(6, // 
    WarningEss.DCUnderVoltage).warningBit(7, // 
    WarningEss.InputOverResistance).warningBit(8, // 
    WarningEss.CombinationError).warningBit(9, // 
    WarningEss.CommWithInverterError).warningBit(10, // 
    WarningEss.TmeError)), new UnsignedWordElement(151, // 
    new ModbusBitWrappingChannel("PcsAlarm2", this, this.thingState)), new UnsignedWordElement(152, // 
    new ModbusBitWrappingChannel("PcsFault1", this, this.thingState).faultBit(0, // 
    FaultEss.ControlCurrentOverload100Percent).faultBit(1, // 
    FaultEss.ControlCurrentOverload110Percent).faultBit(2, // 
    FaultEss.ControlCurrentOverload150Percent).faultBit(3, // 
    FaultEss.ControlCurrentOverload200Percent).faultBit(4, // 
    FaultEss.ControlCurrentOverload120Percent).faultBit(5, // 
    FaultEss.ControlCurrentOverload300Percent).faultBit(6, // 
    FaultEss.ControlTransientLoad300Percent).faultBit(7, // 
    FaultEss.GridOverCurrent).faultBit(8, // 
    FaultEss.LockingWaveformTooManyTimes).faultBit(9, // 
    FaultEss.InverterVoltageZeroDriftError).faultBit(10, // 
    FaultEss.GridVoltageZeroDriftError).faultBit(11, // 
    FaultEss.ControlCurrentZeroDriftError).faultBit(12, // 
    FaultEss.InverterCurrentZeroDriftError).faultBit(13, // 
    FaultEss.GridCurrentZeroDriftError).faultBit(14, // 
    FaultEss.PDPProtection).faultBit(15, // 
    FaultEss.HardwareControlCurrentProtection)), new // 
    UnsignedWordElement(// 
    153, // 
    new ModbusBitWrappingChannel("PcsFault2", this, this.thingState).faultBit(0, // 
    FaultEss.HardwareACVoltProtection).faultBit(1, // 
    FaultEss.HardwareDCCurrentProtection).faultBit(2, // 
    FaultEss.HardwareTemperatureProtection).faultBit(3, // 
    FaultEss.NoCapturingSignal).faultBit(4, // 
    FaultEss.DCOvervoltage).faultBit(5, // 
    FaultEss.DCDisconnected).faultBit(6, // 
    FaultEss.InverterUndervoltage).faultBit(7, // 
    FaultEss.InverterOvervoltage).faultBit(8, // 
    FaultEss.CurrentSensorFail).faultBit(9, // 
    FaultEss.VoltageSensorFail).faultBit(10, // 
    FaultEss.PowerUncontrollable).faultBit(11, // 
    FaultEss.CurrentUncontrollable).faultBit(12, // 
    FaultEss.FanError).faultBit(13, // 
    FaultEss.PhaseLack).faultBit(14, // 
    FaultEss.InverterRelayFault).faultBit(15, // 
    FaultEss.GridRelayFault)), new // 
    UnsignedWordElement(// 
    154, // 
    new ModbusBitWrappingChannel("PcsFault3", this, this.thingState).faultBit(0, // 
    FaultEss.ControlPanelOvertemp).faultBit(1, // 
    FaultEss.PowerPanelOvertemp).faultBit(2, // 
    FaultEss.DCInputOvercurrent).faultBit(3, // 
    FaultEss.CapacitorOvertemp).faultBit(4, // 
    FaultEss.RadiatorOvertemp).faultBit(5, // 
    FaultEss.TransformerOvertemp).faultBit(6, // 
    FaultEss.CombinationCommError).faultBit(7, // 
    FaultEss.EEPROMError).faultBit(8, // 
    FaultEss.LoadCurrentZeroDriftError).faultBit(9, // 
    FaultEss.CurrentLimitRError).faultBit(10, // 
    FaultEss.PhaseSyncError).faultBit(11, // 
    FaultEss.ExternalPVCurrentZeroDriftError).faultBit(12, // 
    FaultEss.ExternalGridCurrentZeroDriftError))), new // 
    WriteableModbusRegisterRange(// 
    200, new UnsignedWordElement(200, setWorkState = // 
    new ModbusWriteLongChannel("SetWorkState", this).label(0, // 
    "Local control").label(1, // "Remote control on grid starting"
    START).label(2, // 
    "Remote control off grid starting").label(3, // 
    STOP).label(4, "Emergency Stop"))), new // 
    WriteableModbusRegisterRange(// 
    201, new SignedWordElement(201, // 
    setActivePower = new ModbusWriteLongChannel("SetActivePower", this).unit("W")), new SignedWordElement(202, // 
    setReactivePower = new ModbusWriteLongChannel("SetReactivePower", this).unit("Var"))), new // 
    WriteableModbusRegisterRange(// 
    9014, new UnsignedWordElement(9014, rtcYear = new ModbusWriteLongChannel("Year", this)), new UnsignedWordElement(9015, rtcMonth = new ModbusWriteLongChannel("Month", this)), new UnsignedWordElement(9016, rtcDay = new ModbusWriteLongChannel("Day", this)), new UnsignedWordElement(9017, rtcHour = new ModbusWriteLongChannel("Hour", this)), new UnsignedWordElement(9018, rtcMinute = new ModbusWriteLongChannel("Minute", this)), new UnsignedWordElement(9019, rtcSecond = new ModbusWriteLongChannel("Second", this))), new WriteableModbusRegisterRange(30558, new UnsignedWordElement(30558, setSetupMode = new ModbusWriteLongChannel("SetSetupMode", this).label(0, EssNature.OFF).label(1, EssNature.ON))), new WriteableModbusRegisterRange(30559, new UnsignedWordElement(30559, setPcsMode = // 
    new ModbusWriteLongChannel("SetPcsMode", this).label(0, // 
    "Emergency").label(1, // 
    "ConsumersPeakPattern").label(2, // 
    "Economic").label(3, // 
    "Eco").label(4, // 
    "Debug").label(5, // 
    "SmoothPv").label(6, "Remote"))), new ModbusRegisterRange(30157, new UnsignedWordElement(30157, setupMode = // 
    new ModbusReadLongChannel("SetupMode", this).label(0, // 
    EssNature.OFF).label(1, EssNature.ON)), new UnsignedWordElement(30158, pcsMode = // 
    new ModbusReadLongChannel("PcsMode", this).label(0, // 
    "Emergency").label(1, // 
    "ConsumersPeakPattern").label(2, // 
    "Economic").label(3, // 
    "Eco").label(4, // 
    "Debug").label(5, // 
    "SmoothPv").label(6, "Remote"))));
    gridMode = new FunctionalReadChannel<Long>("GridMode", this, (channels) -> {
        ReadChannel<Long> state = channels[0];
        try {
            if (state.value() == 1L) {
                return 0L;
            } else {
                return 1L;
            }
        } catch (InvalidValueException e) {
            return null;
        }
    }, systemState).label(0L, OFF_GRID).label(1L, ON_GRID);
    apparentPower = new FunctionalReadChannel<Long>("ApparentPower", this, (channels) -> {
        ReadChannel<Long> activePower = channels[0];
        ReadChannel<Long> reactivePower = channels[1];
        try {
            return ControllerUtils.calculateApparentPower(activePower.value(), reactivePower.value());
        } catch (InvalidValueException e) {
            log.error("failed to calculate apparentPower. some value is missing.", e);
        }
        return 0l;
    }, activePower, reactivePower);
    this.power = new SymmetricPowerImpl(3000, setActivePower, setReactivePower, getParent().getBridge());
    this.allowedApparentLimit = new SMaxLimitation(power);
    this.allowedApparentLimit.setSMax(phaseAllowedApparent.valueOptional().orElse(0L) * 3, 0L, 0L);
    this.phaseAllowedApparent.addChangeListener(new ChannelChangeListener() {

        @Override
        public void channelChanged(Channel channel, Optional<?> newValue, Optional<?> oldValue) {
            allowedApparentLimit.setSMax(phaseAllowedApparent.valueOptional().orElse(0L) * 3, 0L, 0L);
        }
    });
    this.power.addStaticLimitation(this.allowedApparentLimit);
    this.allowedChargeLimit = new PGreaterEqualLimitation(power);
    this.allowedChargeLimit.setP(this.allowedCharge.valueOptional().orElse(0L));
    this.allowedCharge.addChangeListener(new ChannelChangeListener() {

        @Override
        public void channelChanged(Channel channel, Optional<?> newValue, Optional<?> oldValue) {
            allowedChargeLimit.setP(allowedCharge.valueOptional().orElse(0L));
        }
    });
    this.power.addStaticLimitation(this.allowedChargeLimit);
    this.allowedDischargeLimit = new PSmallerEqualLimitation(power);
    this.allowedDischargeLimit.setP(this.allowedDischarge.valueOptional().orElse(0L));
    this.allowedDischarge.addChangeListener(new ChannelChangeListener() {

        @Override
        public void channelChanged(Channel channel, Optional<?> newValue, Optional<?> oldValue) {
            allowedDischargeLimit.setP(allowedDischarge.valueOptional().orElse(0L));
        }
    });
    return protokol;
}

Example 12 with Channel

use of io.openems.api.channel.Channel in project openems by OpenEMS.

the class ThingRepository method addThing.

/**
 * Add a Thing to the Repository and cache its Channels and other information for later usage.
 *
 * @param thing
 */
public synchronized void addThing(Thing thing) {
    if (thingIds.containsValue(thing)) {
        // Thing was already added
        return;
    }
    // Add to thingIds
    thingIds.forcePut(thing.id(), thing);
    // Add to thingClasses
    thingClasses.put(thing.getClass(), thing);
    // Add to bridges
    if (thing instanceof Bridge) {
        bridges.add((Bridge) thing);
    }
    // Add to schedulers
    if (thing instanceof Scheduler) {
        schedulers.add((Scheduler) thing);
    }
    // Add to persistences
    if (thing instanceof Persistence) {
        persistences.add((Persistence) thing);
    }
    // Add to queryablePersistences
    if (thing instanceof QueryablePersistence) {
        queryablePersistences.add((QueryablePersistence) thing);
    }
    // Add to device natures
    if (thing instanceof DeviceNature) {
        deviceNatures.add((DeviceNature) thing);
    }
    // Add Listener
    thing.addListener(this);
    // Apply channel annotation (this happens now and again after initializing the thing via init()
    this.applyChannelAnnotation(thing);
    // Add Channels thingConfigChannels
    ThingDoc thingDoc = classRepository.getThingDoc(thing.getClass());
    for (ChannelDoc channelDoc : thingDoc.getChannelDocs()) {
        Member member = channelDoc.getMember();
        try {
            List<Channel> channels = new ArrayList<>();
            java.util.function.Consumer<Channel> addToChannels = (c) -> {
                if (c == null) {
                // TODO this error is not handled properly
                // log.error(
                // "Channel is returning null! Thing [" + thing.id() + "], Member [" + member.getName() + "]");
                } else {
                    channels.add(c);
                }
            };
            if (member instanceof Method) {
                if (((Method) member).getReturnType().isArray()) {
                    Channel[] ch = (Channel[]) ((Method) member).invoke(thing);
                    for (Channel c : ch) {
                        addToChannels.accept(c);
                    }
                } else {
                    // It's a Method with ReturnType Channel
                    Channel c = (Channel) ((Method) member).invoke(thing);
                    addToChannels.accept(c);
                    if (c instanceof ThingStateChannels) {
                        ThingStateChannels tsc = (ThingStateChannels) c;
                        for (ThingStateChannel fc : tsc.getFaultChannels()) {
                            addToChannels.accept(fc);
                        }
                        for (ThingStateChannel wc : tsc.getWarningChannels()) {
                            addToChannels.accept(wc);
                        }
                    }
                }
            } else if (member instanceof Field) {
                // It's a Field with Type Channel
                Channel c = (Channel) ((Field) member).get(thing);
                addToChannels.accept(c);
            } else {
                continue;
            }
            if (channels.isEmpty()) {
                continue;
            }
            for (Channel channel : channels) {
                // Add Channel to thingChannels
                thingChannels.put(thing, channel.id(), channel);
                if (channel instanceof ConfigChannel) {
                    // Add Channel to configChannels
                    thingConfigChannels.put(thing, (ConfigChannel<?>) channel);
                }
            }
        } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
            log.warn("Unable to add Channel. Member [" + member.getName() + "]", e);
        }
    }
    for (ThingsChangedListener listener : thingListeners) {
        listener.thingChanged(thing, Action.ADD);
    }
}

Example 13 with Channel

use of io.openems.api.channel.Channel in project openems by OpenEMS.

the class ThingRepository method thingChannelsUpdated.

@Override
public void thingChannelsUpdated(Thing thing) {
    // remove Channels from thingChannels, thingWriteChannels
    Databus databus = Databus.getInstance();
    Set<Entry<String, Channel>> thingRow = thingChannels.row(thing).entrySet();
    Iterator<Entry<String, Channel>> i = thingRow.iterator();
    while (i.hasNext()) {
        Entry<String, Channel> thingChannel = i.next();
        if (!(thingChannel.getValue() instanceof ConfigChannel)) {
            thingChannel.getValue().removeChangeListener(databus);
            thingChannel.getValue().removeUpdateListener(databus);
            i.remove();
        }
    }
    thingWriteChannels.removeAll(thing);
    // Add Channels to thingChannels, thingConfigChannels and thingWriteChannels
    ThingDoc thingDoc = classRepository.getThingDoc(thing.getClass());
    for (ChannelDoc channelDoc : thingDoc.getChannelDocs()) {
        Member member = channelDoc.getMember();
        try {
            List<Channel> channels = new ArrayList<>();
            boolean ignoreEmpty = false;
            if (member instanceof Method) {
                if (((Method) member).getReturnType().isArray()) {
                    // ignore e.g. if getFaultChannels is returning an empty array
                    ignoreEmpty = true;
                    Channel[] ch = (Channel[]) ((Method) member).invoke(thing);
                    for (Channel c : ch) {
                        channels.add(c);
                    }
                } else {
                    // It's a Method with ReturnType Channel
                    channels.add((Channel) ((Method) member).invoke(thing));
                }
            } else if (member instanceof Field) {
                // It's a Field with Type Channel
                channels.add((Channel) ((Field) member).get(thing));
            } else {
                continue;
            }
            if (!ignoreEmpty && channels.isEmpty()) {
                log.warn("Channel is returning null! Thing [" + thing.id() + "], Member [" + member.getName() + "]");
                continue;
            }
            for (Channel channel : channels) {
                if (channel != null) {
                    // Add Channel to thingChannels
                    thingChannels.put(thing, channel.id(), channel);
                    // Add Channel to writeChannels
                    if (channel instanceof WriteChannel) {
                        thingWriteChannels.put(thing, (WriteChannel<?>) channel);
                    }
                    // Register Databus as listener
                    if (channel instanceof ReadChannel) {
                        ((ReadChannel<?>) channel).addUpdateListener(databus);
                        ((ReadChannel<?>) channel).addChangeListener(databus);
                    }
                }
            }
        } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
            log.warn("Unable to add Channel. Member [" + member.getName() + "]", e);
        }
    }
}

Example 14 with Channel

use of io.openems.api.channel.Channel in project openems by OpenEMS.

the class SunnyIsland6Ess method defineModbusProtocol.

@Override
protected ModbusProtocol defineModbusProtocol() throws ConfigException {
    ModbusProtocol protokol = new ModbusProtocol(new ModbusRegisterRange(30201, new UnsignedDoublewordElement(30201, systemState = new ModbusReadLongChannel("SystemState", this).label(35, "Fehler").label(303, "Aus").label(307, "OK").label(455, "Warnung")), new UnsignedDoublewordElement(30203, maxPower = new ModbusReadLongChannel("MaxPower", this).unit("W"))), new // 
    ModbusRegisterRange(// 
    30775, new // 
    SignedDoublewordElement(// 
    30775, activePower = new ModbusReadLongChannel("ActivePower", this).unit("W")), new DummyElement(30777, 30802), new // 
    UnsignedDoublewordElement(// 
    30803, frequency = new ModbusReadLongChannel("Frequency", this).unit("mHz").multiplier(1)), new // 
    SignedDoublewordElement(// 
    30805, reactivePower = new ModbusReadLongChannel("ReactivePower", this).unit("var").negate())), new // 
    ModbusRegisterRange(// 
    30843, new // 
    SignedDoublewordElement(// 
    30843, batteryCurrent = new ModbusReadLongChannel("BatteryCurrent", this).unit("mA")), new // 
    UnsignedDoublewordElement(// 
    30845, soc = new ModbusReadLongChannel("Soc", this).unit("%").interval(0, 100)), new DummyElement(30847, 30848), new // 
    SignedDoublewordElement(// 
    30849, batteryTemperature = new ModbusReadLongChannel("BatteryTemperature", this).unit("°C").multiplier(-1)), new // 
    UnsignedDoublewordElement(// 
    30851, batteryVoltage = new ModbusReadLongChannel("BatteryVoltage", this).unit("mV").multiplier(1))), new ModbusRegisterRange(40189, new // 
    UnsignedDoublewordElement(// 
    40189, allowedCharge = new ModbusReadLongChannel("AllowedCharge", this).unit("W").negate()), new // 
    UnsignedDoublewordElement(// 
    40191, allowedDischarge = new ModbusReadLongChannel("AllowedDischarge", this).unit("W"))), new // 
    WriteableModbusRegisterRange(// 
    40149, new SignedDoublewordElement(40149, // 
    setActivePower = new ModbusWriteLongChannel("SetActivePower", this).unit("W")), new UnsignedDoublewordElement(40151, setControlMode = new ModbusWriteLongChannel("SetControlMode", this).label(802, START).label(803, // 
    STOP)), new SignedDoublewordElement(40153, setReactivePower = new ModbusWriteLongChannel("SetReactivePower", this).unit("Var"))), new WriteableModbusRegisterRange(40705, new UnsignedDoublewordElement(40705, // 
    minSocPowerOn = new ModbusWriteLongChannel("MinSocPowerOn", this)), new UnsignedDoublewordElement(40707, // 
    minSocPowerOff = new ModbusWriteLongChannel("MinSocPowerOff", this))), new WriteableModbusRegisterRange(41187, new UnsignedDoublewordElement(41187, meterSetting = new ModbusWriteLongChannel("MeterSetting", this).label(3053, "SMA Energy Meter").label(3547, "Wechselrichter"))));
    this.power = new SymmetricPowerImpl(40000, setActivePower, setReactivePower, getParent().getBridge());
    this.allowedChargeLimit = new PGreaterEqualLimitation(power);
    this.allowedChargeLimit.setP(this.allowedCharge.valueOptional().orElse(0L));
    this.allowedCharge.addChangeListener(new ChannelChangeListener() {

        @Override
        public void channelChanged(Channel channel, Optional<?> newValue, Optional<?> oldValue) {
            allowedChargeLimit.setP(allowedCharge.valueOptional().orElse(0L));
        }
    });
    this.power.addStaticLimitation(this.allowedChargeLimit);
    this.allowedDischargeLimit = new PSmallerEqualLimitation(power);
    this.allowedDischargeLimit.setP(this.allowedDischarge.valueOptional().orElse(0L));
    this.allowedDischarge.addChangeListener(new ChannelChangeListener() {

        @Override
        public void channelChanged(Channel channel, Optional<?> newValue, Optional<?> oldValue) {
            allowedDischargeLimit.setP(allowedDischarge.valueOptional().orElse(0L));
        }
    });
    return protokol;
}

Example 15 with Channel

use of io.openems.api.channel.Channel in project openems by OpenEMS.

the class ChannelRestlet method handle.

@Override
public void handle(Request request, Response response) {
    super.handle(request, response);
    // check general permission
    if (isAuthenticatedAsRole(request, Role.GUEST)) {
        // pfff... it's only a "GUEST"! Deny anything but GET requests
        if (!request.getMethod().equals(Method.GET)) {
            throw new ResourceException(Status.CLIENT_ERROR_UNAUTHORIZED);
        }
    }
    // get request attributes
    Map<String, Object> attributes = request.getAttributes();
    String thingId = (String) attributes.get("thing");
    String channelId = (String) attributes.get("channel");
    // get channel
    Channel channel;
    Optional<Channel> channelOptional = thingRepository.getChannel(thingId, channelId);
    if (channelOptional.isPresent()) {
        // get channel value
        channel = channelOptional.get();
    } else {
        // Channel not found
        throw new ResourceException(Status.CLIENT_ERROR_NOT_FOUND);
    }
    // call handler methods
    if (request.getMethod().equals(Method.GET)) {
        // check read permission
        assertAllowed(request, channel.readRoles());
        Representation entity = getValue(channel);
        response.setEntity(entity);
    } else if (request.getMethod().equals(Method.POST)) {
        // check write permissions
        assertAllowed(request, channel.writeRoles());
        JsonParser parser = new JsonParser();
        String httpPost = request.getEntityAsText();
        JsonObject jHttpPost = parser.parse(httpPost).getAsJsonObject();
        setValue(channel, jHttpPost);
    }
}