Example usage for com.amazonaws.services.iotdata.model GetThingShadowRequest GetThingShadowRequest

Introduction

In this page you can find the example usage for com.amazonaws.services.iotdata.model GetThingShadowRequest GetThingShadowRequest.

Prototype

GetThingShadowRequest

Source Link

Usage

From source file:com.erudika.para.iot.AWSIoTService.java

License:Apache License

@Override
@SuppressWarnings("unchecked")
public Map<String, Object> readThing(Thing thing) {
    if (thing == null || StringUtils.isBlank(thing.getId())) {
        return Collections.emptyMap();
    }// w  ww.j  a  v  a  2s.  c o m
    String id = cloudIDForThing(thing);
    ByteBuffer bb = getDataClient().getThingShadow(new GetThingShadowRequest().withThingName(id)).getPayload();
    if (bb != null) {
        ByteArrayInputStream bais = new ByteArrayInputStream(bb.array());
        try {
            Map<String, Object> payload = ParaObjectUtils.getJsonReader(Map.class).readValue(bais);
            if (payload != null && payload.containsKey("state")) {
                return (Map<String, Object>) ((Map<String, Object>) payload.get("state")).get("desired");
            }
        } catch (Exception ex) {
            logger.warn("Failed to connect to IoT device {}: {}", id, ex.getMessage());
        } finally {
            IOUtils.closeQuietly(bais);
        }
    }
    return Collections.emptyMap();
}

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From source file:io.klerch.alexa.state.handler.AWSIotStateHandler.java

License:Open Source License

private String getState(final AlexaScope scope) throws AlexaStateException {
    final String thingName = getThingName(scope);

    createThingIfNotExisting(scope);// w w w .j  av  a  2  s. co  m

    final GetThingShadowRequest awsRequest = new GetThingShadowRequest().withThingName(thingName);
    try {
        final GetThingShadowResult response = awsDataClient.getThingShadow(awsRequest);
        final ByteBuffer buffer = response.getPayload();

        try {
            return (buffer != null && buffer.hasArray()) ? new String(buffer.array(), "UTF-8") : "{}";
        } catch (UnsupportedEncodingException e) {
            final String error = format("Could not handle received contents of thing-shadow '%1$s'", thingName);
            log.error(error, e);
            throw AlexaStateException.create(error).withCause(e).withHandler(this).build();
        }
    }
    // if a thing does not have a shadow this is a usual exception
    catch (com.amazonaws.services.iotdata.model.ResourceNotFoundException e) {
        log.info(e);
        // we are fine with a thing having no shadow what just means there's nothing to read out for the model
        // return an empty JSON to indicate nothing is in the thing shadow
        return "{}";
    }
}

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