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‎pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>2.4.4</version>
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<relativePath /> <!-- lookup parent from repository -->
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</parent>
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<groupId>com.contentstack</groupId>
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<artifactId>springboot-test</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<name>springboot-test</name>
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<description>Demo project for cspring boot</description>
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<properties>
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<java.version>1.8</java.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-data-rest</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-jersey</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-thymeleaf</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web-services</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-devtools</artifactId>
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<scope>runtime</scope>
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<optional>true</optional>
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</dependency>
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<dependency>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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<optional>true</optional>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.hibernate</groupId>
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<artifactId>hibernate-core</artifactId>
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</dependency>
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<dependency>
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<groupId>com.graphql-java</groupId>
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<artifactId>graphql-spring-boot-autoconfigure</artifactId>
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<version>5.0.2</version>
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</dependency>
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<dependency>
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<groupId>com.graphql-java</groupId>
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<artifactId>graphql-java-servlet</artifactId>
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<version>6.1.3</version>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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<configuration>
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<excludes>
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<exclude>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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</exclude>
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</excludes>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>

‎src/main/java/com/contentstack/gqlspring/GQL.java‎

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package com.contentstack.gqlspring;
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import com.fasterxml.jackson.core.JsonProcessingException;
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import com.fasterxml.jackson.core.type.TypeReference;
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import com.fasterxml.jackson.databind.JsonNode;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import net.minidev.json.JSONObject;
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import org.springframework.http.*;
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import org.springframework.web.client.RestTemplate;
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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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final class GQL {
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private final int id;
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private final String tag;
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private final String[] nodeSplitter;
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private final String url;
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private final JSONObject queryJson;
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private final HttpHeaders headers;
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public GQL(Builder builder) {
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this.id = builder.id;
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this.tag = builder.tag;
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this.nodeSplitter = builder.nodeSplitter;
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this.url = builder.url;
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this.queryJson = builder.queryJson;
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this.headers = builder.headers;
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}
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@Override
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public String toString() {
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return "GQL{" +
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"id=" + id +
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", tag='" + tag + '\'' +
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", nodeSplitter=" + Arrays.toString(nodeSplitter) +
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", url='" + url + '\'' +
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", queryJson=" + queryJson +
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", headers=" + headers +
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'}';
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}
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public JsonNode fetch() throws JsonProcessingException {
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RestTemplate restTemplate = new RestTemplate();
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HttpEntity<JSONObject> entity = new HttpEntity<JSONObject>(queryJson, this.headers);
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ResponseEntity<String> responseEntity = restTemplate.exchange(url, HttpMethod.POST, entity, String.class);
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HttpStatus statusCode = responseEntity.getStatusCode();
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if (statusCode == HttpStatus.OK) {
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String dataString = responseEntity.getBody();
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ObjectMapper mapper = new ObjectMapper();
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return mapper.readTree(dataString);
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} else {
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String dataString = responseEntity.getBody();
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ObjectMapper mapper = new ObjectMapper();
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return mapper.readTree(dataString);
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}
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}
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public <T> void modelIt(String responseString) {
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try {
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ObjectMapper mapper = new ObjectMapper();
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JsonNode actualObj = mapper.readTree(responseString);
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JsonNode items = actualObj.get("data").get("all_product").get("items");
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List<Product> listProduct = mapper.readValue(items.toString(),
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new TypeReference<List<Product>>() {
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});
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System.out.println("listProduct => " + listProduct);
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} catch (JsonProcessingException e) {
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e.printStackTrace();
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}
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}
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public static class Builder {
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private int id;
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private String tag;
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private String url;
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private JSONObject queryJson = new JSONObject();
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private HttpHeaders headers = new HttpHeaders();
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private String[] nodeSplitter = {};
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private Builder() {
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}
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public static Builder newInstance() {
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return new Builder();
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}
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public Builder setId(int id) {
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this.id = id;
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return this;
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}
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public Builder setTag(String tag) {
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this.tag = tag;
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return this;
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}
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public Builder setNode(String node) {
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if (node != null && !node.isEmpty()) {
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this.nodeSplitter = node.split(":");
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}
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List<String> targetList = Arrays.asList(this.nodeSplitter);
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for (String nodeIndex : targetList) {
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System.out.println("nodes: => " + nodeIndex);
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}
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return this;
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}
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public Builder setUrl(String url) {
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this.url = url;
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return this;
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}
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public Builder setQueryString(String queryString) {
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JSONObject jsonObject = new JSONObject();
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jsonObject.appendField("query", queryString);
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this.queryJson = jsonObject;
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return this;
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}
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public Builder setHeader(String access_token) {
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final HttpHeaders headers = new HttpHeaders();
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ArrayList<MediaType> acceptableMediaTypes = new ArrayList<MediaType>();
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acceptableMediaTypes.add(MediaType.APPLICATION_JSON);
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headers.setAccept(acceptableMediaTypes);
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headers.add("access_token", access_token);
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this.headers = headers;
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return this;
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}
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public GQL build() {
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// Do some validation part if required values are not provided
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// if (url.isEmpty()){
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// throw new Exception("Can not work without url");
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// }
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return new GQL(this);
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}
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}
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}

‎src/main/java/com/contentstack/gqlspring/GQLTestApplication.java‎

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package com.contentstack.gqlspring;
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import com.fasterxml.jackson.core.JsonProcessingException;
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import com.fasterxml.jackson.databind.JsonNode;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.validation.annotation.Validated;
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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.RestController;
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@SpringBootApplication
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@RestController
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@Slf4j
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@Validated
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@RequestMapping(path = "api")
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public class GQLTestApplication {
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public static void main(String[] args) {
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SpringApplication.run(GQLTestApplication.class, args);
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}
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@GetMapping(value = "/product")
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public JsonNode getProducts() throws JsonProcessingException {
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GQL gqlInstance = GQL.Builder.newInstance()
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.setUrl("https://graphql.contentstack.com/stacks/blt02f7b45378b008ee?environment=production")
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.setQueryString("{ all_product { items { title description } } }")
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.setHeader("cs5b69faf35efdebd91d08bcf4")
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.build();
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JsonNode response = gqlInstance.fetch().get("data").get("all_product").get("items");;
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System.out.println(response);
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return response;
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}
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@GetMapping(value = "/about")
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public JsonNode getAbout() throws JsonProcessingException {
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GQL gqlInstance = GQL.Builder.newInstance()
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.setTag("about")
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.setUrl("https://graphql.contentstack.com/stacks/blt398b654a8f2799a0?environment=development")
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.setQueryString("query {\n" +
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" home(uid: \"blt2fbdb4f2f324d8cb\") {\n" +
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" about {\n" +
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" title\n" +
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" left_description\n" +
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" right_description\n" +
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" }\n" +
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" }\n" +
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"}")
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.setHeader("cs5af301973f1478fa4eaca0b2")
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.build();
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JsonNode response = gqlInstance.fetch();
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System.out.println(response);
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return response;
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}
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@GetMapping(value = "/banner")
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public JsonNode getBanner() throws JsonProcessingException {
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GQL gqlInstance = GQL.Builder.newInstance()
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.setTag("banner")
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.setUrl("https://graphql.contentstack.com/stacks/blt398b654a8f2799a0?environment=development")
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.setQueryString("query {\n" +
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" home(uid: \"blt2fbdb4f2f324d8cb\") {\n" +
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" banner {\n" +
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" description\n" +
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" title\n" +
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" imageConnection {\n" +
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" edges {\n" +
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" node {\n" +
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" url\n" +
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" }\n" +
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" }\n" +
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" }\n" +
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" }\n" +
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" }\n" +
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"}\n")
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.setHeader("cs5af301973f1478fa4eaca0b2")
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.build();
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JsonNode response = gqlInstance.fetch();
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System.out.println(response);
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return response;
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}
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@GetMapping(value = "/contact")
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public JsonNode getContact() throws JsonProcessingException {
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GQL gqlInstance = GQL.Builder.newInstance()
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.setTag("banner")
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.setUrl("https://graphql.contentstack.com/stacks/blt398b654a8f2799a0?environment=development")
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.setQueryString("query {\n" +
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" home(uid: \"blt2fbdb4f2f324d8cb\") {\n" +
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" contact {\n" +
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" address\n" +
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" email\n" +
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" phone_number\n" +
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" title\n" +
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" }\n" +
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" }\n" +
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"}")
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.setHeader("cs5af301973f1478fa4eaca0b2")
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.build();
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JsonNode response = gqlInstance.fetch();
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System.out.println(response);
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return response;
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}
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}

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