Resources and methods in AWS - Step-by-Step Execution

Process Flow - Resources and methods

Define Resource

↓

Attach Methods

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Configure Method Settings

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Deploy API

↓

Client Calls Method

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API Executes Resource Logic

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Return Response to Client

This flow shows how an API resource is defined, methods are attached and configured, then deployed and called by clients.

Execution Sample

AWS

Resource: /books
Method: GET
Integration: Lambda function
Deploy API
Client calls GET /books

Defines a /books resource with a GET method integrated to a Lambda function, then deploys and calls it.

Process Table

Step	Action	Resource State	Method State	Result
1	Define resource /books	Resource /books created	No methods yet	Resource ready
2	Attach GET method to /books	Resource /books exists	GET method attached	Method ready
3	Configure GET method integration	Resource /books exists	GET method integrated with Lambda	Integration set
4	Deploy API	Resource and methods deployed	Methods active	API live
5	Client calls GET /books	Resource /books exists	GET method invoked	Lambda function executed
6	Lambda returns data	Resource /books exists	GET method completed	Response sent to client
7	End	Resource /books exists	GET method ready	Execution complete

💡 Execution stops after response is sent to client and method completes.

Status Tracker

Variable	Start	After Step 1	After Step 2	After Step 3	After Step 4	After Step 5	After Step 6	Final
Resource	None	/books created	/books exists	/books exists	/books deployed	/books exists	/books exists	/books exists
Method GET	None	None	Attached	Integrated with Lambda	Active	Invoked	Completed	Ready
API Deployment	Not deployed	Not deployed	Not deployed	Not deployed	Deployed	Deployed	Deployed	Deployed
Client Call	No call	No call	No call	No call	No call	Call made	Response sent	No call

Key Moments - 3 Insights

Why do we need to attach a method to a resource before deployment?

Because methods define how clients interact with the resource. Without methods, the resource cannot respond to requests. See execution_table step 2 where method is attached before deployment at step 4.

What happens if the method integration is not configured?

The method exists but has no backend logic to execute, so calls will fail or return errors. See execution_table step 3 where integration is set before deployment.

Why does the client call happen only after deployment?

Because the API must be deployed to make resources and methods live and accessible. See execution_table step 4 deploys API, then step 5 client calls method.

Visual Quiz - 3 Questions

Look at the execution_table, what is the state of the GET method after step 3?

A Method integrated with Lambda function

B Method attached but not integrated

C Method invoked by client

D Method completed execution

💡 Hint

Check the 'Method State' column at step 3 in execution_table.

At which step does the API become live and ready to accept client calls?

A Step 2

B Step 4

C Step 3

D Step 5

💡 Hint

Look for 'API live' in the 'Result' column of execution_table.

If the resource /books was not created at step 1, what would happen at step 5 when client calls GET /books?

A Method would execute normally

B API would deploy successfully

C Client call would fail because resource does not exist

D Lambda function would run without resource

💡 Hint

Refer to variable_tracker for Resource variable state at step 1 and step 5.

Concept Snapshot

Resources are API paths like /books.
Methods (GET, POST) attach to resources to handle requests.
Methods must be integrated with backend logic (e.g., Lambda).
API must be deployed to make resources and methods live.
Clients call methods on resources to get responses.

Full Transcript

This visual execution shows how an API resource is created, methods are attached and integrated with backend logic, then deployed. The client calls the method after deployment, triggering backend execution and response. Variables track resource and method states step-by-step. Key moments clarify why method attachment and integration are needed before deployment, and why deployment is required before client calls. The quiz tests understanding of method state, deployment timing, and resource existence impact.