constructor()

in src/QLDBKVS.ts [59:119]
47 lines of code
9 McCabe index (conditional complexity)

    constructor(ledgerName: string, tableName: string, checkForTable?: boolean) {
        const fcnName = "[QLDBKVS.constructor]";
        try {
            if (!ledgerName) {
                throw new Error(`${fcnName}: Please specify ledgerName`);
            }
            if (!tableName) {
                throw new Error(`${fcnName}: Please specify tableName, which is the name of a table you are planning to use`);
            }

            const checkForTableAndCreate = typeof checkForTable == "boolean" ? checkForTable : true;

            validateLedgerNameConstrains(ledgerName);
            validateTableNameConstrains(tableName);

            this.ledgerName = ledgerName;
            this.tableName = tableName;
            this.tableState = "CHECKING";

            logger.debug(`${fcnName} Creating QLDB driver`);

            this.qldbDriver = createQldbDriver(ledgerName);

            logger.debug(`${fcnName} QLDB driver created`);

            if (checkForTableAndCreate) {
                // Making sure the table exists and set it for creation 
                // next time somebody will decide to submit a new document to QLDB
                (async () => {

                    //// Listing tables names
                    logger.info(`${fcnName} Listing table names...`);
                    let tableNames: string[] = await listTables(this.qldbDriver);
                    tableNames = tableNames.map(x => { return x.toUpperCase() });

                    //// Checking if table is already created and create if not
                    logger.info(`${fcnName} Checking if table with name ${tableName} exists`);
                    if (tableNames.indexOf(tableName.toUpperCase()) >= 0) {
                        this.tableState = "EXIST";
                    } else {
                        this.tableState = "NOT_EXIST";
                    }

                    if (this.tableState === "NOT_EXIST") {
                        this.tableState = "CREATING"
                        logger.info(`${fcnName} Looks like a table with name ${tableName} does not exist. Creating it.`)
                        await createTableWithIndex(this.qldbDriver, tableName, KEY_ATTRIBUTE_NAME);
                        this.tableState = "EXIST";
                        return true
                    }
                })();
            } else {
                this.tableState = "EXIST";
            }
        } catch (err) {
            const msg = `Could not construct an instance of QLDB KVS class`;
            logger.error(`${fcnName} ${msg}: ${err}`);
            throw new Error(msg);
        }
        return this;
    }