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pratikdaspratikdas
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Merge branch 'master' into node-errorhandling
2 parents 2223be8 + 1f37a81 commit 0414422

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‎build-all.sh‎

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if [[ "$MODULE" == "module6" ]]
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then
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build_maven_module "spring-boot/spring-boot-app-info"
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build_maven_module "spring-boot/spring-boot-null-safe-annotations"
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build maven_module "aws/cdkv2"
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build_maven_module "immutables"
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if [[ "$MODULE" == "module5" ]]
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then
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build_maven_module "spring-boot/beginners-guide"
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build_maven_module "aws/aws-dynamodb"
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build_maven_module "spring-boot/spring-boot-testconfiguration"
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build_maven_module "aws/springcloudrds"

‎core-java/annotation-processing/introduction-to-annotations/src/main/java/com/reflectoring/CSV.java‎

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package com.reflectoring;
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import java.lang.annotation.ElementType;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.lang.annotation.Target;
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@Target(ElementType.TYPE)
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@Retention(RetentionPolicy.RUNTIME)
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public @interface CSV {
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}

‎core-java/annotation-processing/introduction-to-annotations/src/main/java/com/reflectoring/TestMarkerAnnotation.java‎

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package com.reflectoring;
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public class TestMarkerAnnotation {
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public static void main(String[] args) {
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XYZClient client = new XYZClient();
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Class clientClass = client.getClass();
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if (clientClass.isAnnotationPresent(CSV.class)){
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System.out.println("Write client data to CSV.");
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} else {
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System.out.println("Write client data to Excel file.");
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}
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}
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}

‎core-java/annotation-processing/introduction-to-annotations/src/main/java/com/reflectoring/XYZClient.java‎

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package com.reflectoring;
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@CSV
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public class XYZClient {
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}

‎nodejs/middleware/app.ts‎

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import express, { Request, Response, NextFunction } from 'express'
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import morgan from 'morgan'
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const app = express()
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const port:number = 3000
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interface Product {
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name: string
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price: number
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brand: string
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category?: string
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}
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interface ProductCreationResponse {
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productID: string
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result: string
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}
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class AppError extends Error{
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statusCode: number;
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constructor(statusCode: number, message: string) {
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super(message);
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Object.setPrototypeOf(this, new.target.prototype);
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this.name = Error.name;
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this.statusCode = statusCode;
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Error.captureStackTrace(this);
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}
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}
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const requestLogger = (request: Request, response: Response, next: NextFunction) => {
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console.log(`${request.method} url:: ${request.url}`);
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next()
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}
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app.use(express.static('images'))
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app.use(express.static('htmls'))
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app.use(requestLogger)
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app.use(morgan('tiny'))
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app.use('/products', express.json({ limit: 100 }))
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// Error handling Middleware functions
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const errorLogger = (error: Error, request: Request, response: Response, next: NextFunction) => {
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console.log( `error ${error.message}`)
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next(error) // calling next middleware
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}
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const errorResponder = (error: AppError, request: Request, response: Response, next: NextFunction) => {
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response.header("Content-Type", 'application/json')
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const status = error.statusCode || 400
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response.status(status).send(error.message)
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}
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const invalidPathHandler = (request: Request, response: Response, next: NextFunction) => {
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response.status(400)
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response.send('invalid path')
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}
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app.get('product', (request: Request, response: Response)=>{
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response.sendFile("productsample.html")
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})
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// handle get request for path /
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app.get('/', (request: Request, response: Response) => {
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response.send('response for GET request');
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})
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const requireJsonContent = (request: Request, response: Response, next: NextFunction) => {
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if (request.headers['content-type'] !== 'application/json') {
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response.status(400).send('Server requires application/json')
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} else {
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next()
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}
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}
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const addProducts = (request: Request, response: Response, next: NextFunction) => {
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let products: Product[] = []
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const name: string = request.body.name
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const brand: string = request.body.brand
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const category: string = request.body.category
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console.log(name + " " + brand)
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products.push({name: request.body.name, brand: request.body.brand, price: request.body.price})
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const productCreationResponse: ProductCreationResponse = {productID: "12345", result: "success"}
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response.json(productCreationResponse)
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response.status(200).json(products);
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}
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app.post('/products', addProducts)
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app.get('/productswitherror', (request: Request, response: Response) => {
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let error: AppError = new AppError(400, `processing error in request at ${request.url}`)
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throw error
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})
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app.use(errorLogger)
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app.use(errorResponder)
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app.use(invalidPathHandler)
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app.listen(port, () => {
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console.log(`Server listening at port ${port}.`)
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})

‎nodejs/middleware/htmls/productsample.html‎

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<html>
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<body>
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<h2>My sample product page</h2>
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<img src="sample.jpg" alt="sample"></img>
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</body>
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</html>

‎nodejs/middleware/images/sample.jpg‎

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‎nodejs/middleware/index.js‎

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const express = require('express')
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const morgan = require('morgan')
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const app = express();
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const requestLogger = (request, response, next) => {
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console.log(`${request.method} url:: ${request.url}`);
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next()
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}
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app.use(express.static('images'))
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app.use(express.static('htmls'))
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app.use(requestLogger)
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app.use(morgan('tiny'))
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app.use('/products', express.json({ limit: 100 }))
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// Error handling Middleware functions
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const errorLogger = (error, request, response, next) => {
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console.log( `error ${error.message}`)
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next(error) // calling next middleware
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}
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const errorResponder = (error, request, response, next) => {
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response.header("Content-Type", 'application/json')
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const status = error.status || 400
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response.status(status).send(error.message)
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}
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const invalidPathHandler = (request, response, next) => {
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response.status(400)
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response.send('invalid path')
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}
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app.get('product', (request, response)=>{
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response.sendFile("productsample.html")
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})
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// handle get request for path /
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app.get('/', (request, response) => {
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response.send('response for GET request');
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})
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const requireJsonContent = (request, response, next) => {
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if (request.headers['content-type'] !== 'application/json') {
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response.status(400).send('Server requires application/json')
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} else {
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next()
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}
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}
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// handle post request for path /products
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app.post('/products', requireJsonContent, (request, response) => {
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const products = []
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const name = request.body.name
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const brand = request.body.brand
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const category = request.body.category
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console.log(name + " " + brand)
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products.push({name: request.body.name, brand: request.body.brand, price: request.body.price})
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const productCreationResponse = {productID: "12345", result: "success"}
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response.json(productCreationResponse)
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})
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app.get('/productswitherror', (request, response) => {
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let error = new Error(`processing error in request at ${request.url}`)
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error.statusCode = 400
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throw error
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})
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app.use(errorLogger)
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app.use(errorResponder)
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app.use(invalidPathHandler)
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const port = 3000
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app.listen(3000,
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() => console.log(`Server listening on port ${port}.`));
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