async getDeviceType()

in source/microservices/lib/simulationManager.js [233:279]
47 lines of code
9 McCabe index (conditional complexity)

    async getDeviceType(simId, attributes) {
        const BATCH_GET_MAX = 100;
        let sim = await this.getSimulation(simId);
        let keys = sim.devices.map((device) => ({ typeId: device.typeId }));
        let keySubset = keys.splice(0, BATCH_GET_MAX);
        let processedResults = [];
        let data;
        const retryMax = 5;
        try {
            while (keySubset.length > 0) {
                let retryCount = 0;
                let params = {
                    RequestItems: {
                        [process.env.DEVICE_TYPES_TBL]: {
                            Keys: keySubset,
                            ProjectionExpression: attributes
                        }
                    }
                };
                data = await docClient.batchGet(params).promise();
                processedResults.push(...data.Responses[process.env.DEVICE_TYPES_TBL]);
                let unprocessedKeys = data.UnprocessedKeys;
                while (unprocessedKeys && Object.keys(unprocessedKeys).length > 0 && retryCount <= retryMax) {
                    await wait(2 ** retryCount * 25);
                    params.RequestItems = unprocessedKeys;
                    data = await docClient.batchGet(params).promise();
                    processedResults.push(...data.Responses[process.env.DEVICE_TYPES_TBL]);
                    unprocessedKeys = data.UnprocessedKeys;
                    retryCount++;
                }
                keySubset = keys.splice(0, BATCH_GET_MAX);
            }
            if (processedResults.length > 0) {
                return (processedResults);
            } else {
                let error = new Error();
                error.code = 400;
                error.error = 'MissingDeviceType';
                error.message = `The device types do not exist.`;
                throw (error);
            }
        } catch (err) {
            console.error(err);
            console.error(`Error occurred while attempting to get Device Types for simulation ${simId}.`);
            throw (err);
        }
    }