const dbFactory: DbFactoryBase;
const dbFactoryTracer: DbFactoryBase = new DbFactoryTracer(dbFactory);

const configDbFactoryTracer: ITraceable<DbFactoryBase>;
const loadProjectDataFunc: EnumLoadDelegate<ProjectData>;
const buildDbFactoryFunc: (name: string, url: string) => DbFactoryBase;
const dbFactoryTracer: DbFactoryBase = new ProjectDbFactoryTracer('应用', '环境', loadProjectDataFunc, buildDbFactoryFunc);

const origin: ITraceable<T>;
const parentSpan: opentracing.Span;
const tracer: opentracing.Tracer;
const res: T = origin.withTrace(parentSpan, tracer);

const origin: T;
const tracer: ITraceable<T> = new TracerStrategy(origin);

const cache: CacheBase;
const parentSpan: opentracing.Span;
const tracer: opentracing.Tracer;
const allProjectData = await loadAllProjectWithTracer(cache, '配置服务地址', parentSpan, tracer);

const redis: RedisBase;
const redisTracer = buildRedisTracer(redis);

const rpc: RpcBase;
const rpcTracer: RpcBase = new RpcTracer(rpc);

const cache: CacheBase;
const rpc: RpcBase = new ProjectRpcTracer(cache, '配置服务地址', '环境');

const allUserModuleDelegate: AllUserModuleDelegate;
const parentSpan: opentracing.Span;
const tracer: opentracing.Tracer;
const userFactory: UserFactoryBase<UserServiceTracer> = new UserFactoryTracer(allUserModuleDelegate, parentSpan, tracer);

const rpc: RpcBase;
const userValueDelegate = buildRpcTracerUserValueDelegate(rpc);