Spring Boot - API Cantabile Hands-on Solutions | TCS Fresco Play

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Course Path: Microservices/CONSTRUCTION/Spring Boot - API Cantabile

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Spring Boot API Cantabile MCQ Solution

1.Spring Boot Rest API

Buid a Rest API

File Name-HospitalController.java

package com.example.project;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.web.bind.annotation.PathVariable;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.ResponseBody;

import org.springframework.web.bind.annotation.RestController;

@RestController

@RequestMapping("/test/")

public class HospitalController {

    @Autowired

    private HospitalService hospitalService;

@RequestMapping(value = "/hospitals/{id}", method = RequestMethod.GET)

public @ResponseBody Hospital getHospital(@PathVariable("id") int id) throws Exception {

        Hospital hospital = this.hospitalService.getHospital(id);

        return hospital;

    }

@RequestMapping(value = "/hospitals", method = RequestMethod.GET)

public @ResponseBody List<Hospital> getAllHospitals() throws Exception {

    return this.hospitalService.getAllHospitals();

    }

}

File Name-HospitalService.java

package com.example.project;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import org.springframework.stereotype.Service;

@Service

public class HospitalService {

  private List<Hospital> hospitalList=new ArrayList<>(Arrays.asList(

      new Hospital(1001, "Apollo Hospital", "Chennai", 3.8),

      new Hospital(1002,"Global Hospital","Chennai", 3.5),

      new Hospital(1003,"VCare Hospital","Bangalore", 3)));

public List<Hospital> getAllHospitals(){

  List<Hospital> hospitalList= new ArrayList<Hospital>();

  return hospitalList;

}

public Hospital getHospital(int id){

  return hospitalList.stream().filter(c->c.getId()==(id)).findFirst().get();

}

}

File Name- Hospital.java

package com.example.project;

public class Hospital {

    private int id;

    private String name;

    private String city;

    private double rating;

    public Hospital() {

    }

    public Hospital(int id, String name, String city, double rating) {

      this.id= id;

      this.name= name;

      this.city= city;

      this.rating=rating;

    }

  public int getId() {

    return id;

  }

  public void setId(int id) {

    this.id = id;

  }

  public String getName() {

    return name;

  }

  public void setName(String name) {

    this.name = name;

  }

  public String getCity() {

    return city;

  }

  public void setCity(String city) {

    this.city = city;

  }

  public double getRating() {

    return rating;

  }

  public void setRating(double rating) {

    this.rating = rating;

  }

  }

Spring Boot API Cantabile MCQ Solution

2.Spring Boot - Database Integration

(Same as the answer of First Question - Spring Boot Rest API)

3.Welcome to Spring Boot - Handson - Security

File Name-SpringSecurityConfig.java

package com.example.project;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.context.annotation.Configuration;

import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;

import org.springframework.security.config.annotation.web.builders.HttpSecurity;

import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;

import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;

@Configuration

@EnableWebSecurity

public class SpringSecurityConfig extends WebSecurityConfigurerAdapter {

  @Autowired

  private AuthenticationEntryPoint authEntryPoint;

  @Override

  protected void configure(HttpSecurity http) throws Exception {

    http.csrf().disable().authorizeRequests()

      .anyRequest().authenticated()

        .and().httpBasic()

        .authenticationEntryPoint(authEntryPoint);

  }

  @Autowired

  public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {

auth.inMemoryAuthentication().withUser("username").password("password").roles("USER");

  }

}

File Name-AuthenticationEntryPoint.java

package com.example.project;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.security.core.AuthenticationException;

import org.springframework.security.web.authentication.www.BasicAuthenticationEntryPoint;

import org.springframework.stereotype.Component;

@Component

public class AuthenticationEntryPoint extends BasicAuthenticationEntryPoint {

  @Override

    public void commence(HttpServletRequest request, HttpServletResponse response, AuthenticationException authEx)

      throws IOException, ServletException {

        response.addHeader("LoginUser", "Basic " +getRealmName());

        response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);

        PrintWriter writer = response.getWriter();

        writer.println("HTTP Status 401 - " + authEx.getMessage());

    }

  @Override

    public void afterPropertiesSet() throws Exception {

        setRealmName("springboot");

        super.afterPropertiesSet();

   }

}

Spring Boot API Cantabile MCQ Solution

Spring Boot API Cantabile MCQ Solution

Spring Boot API Cantabile MCQ Solution