spring-graphql SpringProjectsClient 源码
spring-graphql SpringProjectsClient 代码
文件路径：/samples/webmvc-http/src/main/java/io/spring/sample/graphql/project/SpringProjectsClient.java
package io.spring.sample.graphql.project;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import org.springframework.boot.web.client.RestTemplateBuilder;
import org.springframework.hateoas.CollectionModel;
import org.springframework.hateoas.MediaTypes;
import org.springframework.hateoas.client.Hop;
import org.springframework.hateoas.client.Traverson;
import org.springframework.hateoas.server.core.TypeReferences;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.stereotype.Component;
import org.springframework.web.client.RestTemplate;
@Component
public class SpringProjectsClient {
private static final TypeReferences.CollectionModelType<Release> releaseCollection =
new TypeReferences.CollectionModelType<Release>() {};
private final Traverson traverson;
public SpringProjectsClient(RestTemplateBuilder builder) {
List<HttpMessageConverter<?>> converters = Traverson.getDefaultMessageConverters(MediaTypes.HAL_JSON);
RestTemplate restTemplate = builder.messageConverters(converters).build();
this.traverson = new Traverson(URI.create("https://spring.io/api/"), MediaTypes.HAL_JSON);
this.traverson.setRestOperations(restTemplate);
}
public Project fetchProject(String projectSlug) {
return this.traverson.follow("projects")
.follow(Hop.rel("project").withParameter("id", projectSlug))
.toObject(Project.class);
}
public List<Release> fetchProjectReleases(String projectSlug) {
CollectionModel<Release> releases = this.traverson.follow("projects")
.follow(Hop.rel("project").withParameter("id", projectSlug)).follow(Hop.rel("releases"))
.toObject(releaseCollection);
return new ArrayList(releases.getContent());
}
}
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