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Azhwani
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package com.baeldung.resttemplateexception;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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@SpringBootApplication
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public class RestTemplateExceptionApplication {
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public static void main(String[] args) {
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SpringApplication.run(RestTemplateExceptionApplication.class, args);
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}
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}
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package com.baeldung.resttemplateexception.controller;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RequestParam;
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import org.springframework.web.bind.annotation.RestController;
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import com.baeldung.resttemplateexception.model.Criterion;
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import com.baeldung.resttemplateexception.model.Product;
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import com.fasterxml.jackson.core.JsonProcessingException;
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import com.fasterxml.jackson.databind.JsonMappingException;
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import com.fasterxml.jackson.databind.ObjectMapper;
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@RestController
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@RequestMapping("/api")
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public class ProductApi {
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private List<Product> productList = new ArrayList<>(Arrays.asList(new Product(1, "Acer Aspire 5", 437), new Product(2, "ASUS VivoBook", 650), new Product(3, "Lenovo Legion", 990)));
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@GetMapping("/get")
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public Product get(@RequestParam String criterion) throws JsonMappingException, JsonProcessingException {
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ObjectMapper objectMapper = new ObjectMapper();
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Criterion crt;
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crt = objectMapper.readValue(criterion, Criterion.class);
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if (crt.getProp().equals("name"))
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return findByName(crt.getValue());
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// Search by other properties (id,price)
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return null;
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}
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private Product findByName(String name) {
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for (Product product : this.productList) {
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if (product.getName().equals(name)) {
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return product;
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}
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}
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return null;
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}
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// Other methods
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}
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package com.baeldung.resttemplateexception.model;
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public class Criterion {
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private String prop;
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private String value;
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public Criterion() {
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}
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public String getProp() {
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return prop;
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}
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public void setProp(String prop) {
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this.prop = prop;
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}
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public String getValue() {
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return value;
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}
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public void setValue(String value) {
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this.value = value;
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}
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}
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package com.baeldung.resttemplateexception.model;
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public class Product {
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private int id;
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private String name;
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private double price;
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public Product() {
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}
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public Product(int id, String name, double price) {
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this.id = id;
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this.name = name;
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this.price = price;
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}
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public int getId() {
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return id;
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}
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public void setId(int id) {
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this.id = id;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public double getPrice() {
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return price;
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}
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public void setPrice(double price) {
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this.price = price;
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}
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}
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package com.baeldung.resttemplateexception;
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import static org.junit.Assert.assertEquals;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.test.context.SpringBootTest;
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import org.springframework.test.context.junit4.SpringRunner;
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import org.springframework.web.client.RestTemplate;
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import org.springframework.web.util.UriComponentsBuilder;
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import com.baeldung.resttemplateexception.model.Product;
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@RunWith(SpringRunner.class)
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@SpringBootTest(classes = { RestTemplate.class, RestTemplateExceptionApplication.class })
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public class RestTemplateExceptionLiveTest {
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@Autowired
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RestTemplate restTemplate;
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@Test(expected = IllegalArgumentException.class)
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public void givenGetUrl_whenJsonIsPassed_thenThrowException() {
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String url = "http://localhost:8080/spring-rest/api/get?criterion={\"prop\":\"name\",\"value\":\"ASUS VivoBook\"}";
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Product product = restTemplate.getForObject(url, Product.class);
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}
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@Test
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public void givenGetUrl_whenJsonIsPassed_thenGetProduct() {
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String criterion = "{\"prop\":\"name\",\"value\":\"ASUS VivoBook\"}";
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String url = "http://localhost:8080/spring-rest/api/get?criterion={criterion}";
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Product product = restTemplate.getForObject(url, Product.class, criterion);
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assertEquals(product.getPrice(), 650, 0);
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}
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@Test
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public void givenGetUrl_whenJsonIsPassed_thenReturnProduct() {
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String criterion = "{\"prop\":\"name\",\"value\":\"Acer Aspire 5\"}";
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String url = "http://localhost:8080/spring-rest/api/get";
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UriComponentsBuilder builder = UriComponentsBuilder.fromUriString(url).queryParam("criterion", criterion);
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Product product = restTemplate.getForObject(builder.build().toUri(), Product.class);
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assertEquals(product.getId(), 1, 0);
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}
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}
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