Sample

What it is responsible for

Sample manages application entry paths and example-facing interfaces, with

AppController

getHello

and

AppController

root

identified as work-entry points. Its named pieces span controller actions such as

create

findAll

, and

findOne

; GraphQL access at

/graphql

; and a Swagger interface at

/api

. The documented startup paths include examples requiring Docker or local MySQL, and others requiring Docker or local mongodb; after their required service is available, Nest runs with

npm run start

. The authors also flag a remote-machine listen-address change under the documented adapter instructions.

What it refuses

Sample rejects input when validation reports

Validation failed

because

isNaN(val)

or because

errors.length > 0

. It rejects authentication attempts with

UnauthorizedException

when

!token

and when

user?.password !== pass

. It rejects missing recipes with

NotFoundException

when

!recipe

, and GraphQL requests with

GraphQLError

when

complexity >= 20

What it needs, and who needs it

Sample depends on

sample/03-microservices/src/math

sample/04-grpc/src/hero

Auth

sample/26-queues/src/audio

sample/27-scheduling/src/tasks

, and

Orders

. Those named dependencies are the external sides Sample needs; without any one, the supplied evidence does not state a specific failure mode. No subsystem is listed as depending on Sample, so the evidence names no consumer that would break without it.

Notable members

AppController

carries listed entry work through

getHello

and

root

, making it the clearest ingress symbol.

ValidationPipe

and

ParseIntPipe

carry the displayed validation boundary: the refusal conditions explicitly cover invalid numeric input and nonempty validation errors.

RolesGuard

is the named authorization boundary most closely aligned with the two displayed

UnauthorizedException

conditions, while

CatsController

is the named controller alongside the

create

findAll

, and

findOne

operations. Their exact internal control flow is not documented here. 449 entities in

sample

. Nothing else in this repository depends on it.

What it is made of

Its 449 entities sit in 92 files under

sample

: 312 doc comments, 40 modules, 25 markdown docs, 14 HTTP endpoints and 58 more.

schema.gql

holds 11 of them — more than any other file here.

Where work enters

11 controllers publish 14 HTTP endpoints — 11

GET

and 3

POST

. None of them declares a guard.

AppController

—

sample/08-webpack/src/app.controller.ts

getHello

—

sample/08-webpack/src/app.controller.ts

AppController

—

sample/15-mvc/src/app.controller.ts

```
root
```
—
```
sample/15-mvc/src/app.controller.ts
```
:5

AppController

—

sample/17-mvc-fastify/src/app.controller.ts

root

—

sample/17-mvc-fastify/src/app.controller.ts

Boundaries

It depends on

Math

Hero

Auth

Audio

Tasks

Orders

, and on nothing else in this repository.

How this code is named

These conventions cover most of the codebase. Learning them is faster than reading an index — each one lets you find any member of its family without looking it up.

Pattern	Where	Count	Examples
`*.module.ts`	across the repository	73	`app.module.ts` , `cats.module.ts` , `core.module.ts` , `math.module.ts`
`*.service.ts`	across the repository	30	`app.service.ts` , `cats.service.ts` , `auth.service.ts` , `users.service.ts`
`*.controller.ts`	across the repository	25	`app.controller.ts` , `cats.controller.ts` , `math.controller.ts` , `hero.controller.ts`
`find*`	exported symbols	17	`findAll` , `findOne`

What it is responsible for

What it refuses

What it needs, and who needs it

Notable members

What it is made of

Where work enters

Boundaries

How this code is named

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