async getMetadata()

in projects/alloydb-autoscaler/src/alloydb-autoscaler/poller/alloydb-metadata-reader.ts [38:90]
46 lines of code
6 McCabe index (conditional complexity)

  async getMetadata(): Promise<MetadataValueMap> {
    this.logger.info({
      message: `----- ${this.instance.info.resourcePath}: Metadata -----`,
    });

    const response = await this.alloyDbClient.getInstance({
      name: this.instance.info.resourcePath,
    });
    if (!response || !Array.isArray(response)) {
      throw new Error(
        'Unable to read metadata from AlloyDB instance ' +
          this.instance.info.resourcePath
      );
    }

    const [instance] = response;
    if (!instance) {
      throw new Error(
        'Unable to read metadata from AlloyDB instance ' +
          this.instance.info.resourcePath
      );
    }

    const instanceType = instance?.instanceType;
    const nodeCount = instance?.readPoolConfig?.nodeCount;
    const cpuCount = instance?.machineConfig?.cpuCount;

    this.logger.debug({message: `instanceType: ${instanceType}`});
    this.logger.debug({message: `nodeCount: ${nodeCount}`});
    this.logger.debug({message: `cpuCount: ${cpuCount}`});

    if (instanceType !== 'READ_POOL') {
      throw new Error(
        'Only AlloyDB read pool instances are currently supported. ' +
          `Instance ${this.instance.info.resourcePath} is of type ` +
          instanceType
      );
    }

    if (!nodeCount) {
      throw new Error(
        'Unable to read current node count for AlloyDB instance ' +
          this.instance.info.resourcePath
      );
    }

    return {
      currentSize: nodeCount,
      nodeCount: nodeCount,
      cpuCount: cpuCount ?? 0,
      instanceType: instance.instanceType ?? '',
    };
  }