我有一个服务的应用程序示例:
RestApp.java
import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;
@ApplicationPath("/webapi")
public class RestApp extends Application {
@Override
public Set<Class<?>> getClasses() {
final Set<Class<?>> classes = new HashSet<>();
classes.add(MessageService.class);
return classes;
}
}
MessageService.java
import javax.ejb.Stateless;
import javax.inject.Inject;
import javax.ws.rs.*;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import java.net.URI;
import java.util.List;
@Stateless
@Path("/messages")
public class MessageService {
@Inject
private MessagesManager messagesManager;
@GET
@Path("all")
@Produces({MediaType.APPLICATION_JSON})
public List<Message> getMessages() {
return messagesManager.getMessages();
}
}
并且服务依赖于单例MessagesManager.java:
import javax.ejb.*;
import javax.inject.Singleton;
@Singleton
@Startup
@ConcurrencyManagement(ConcurrencyManagementType.CONTAINER)
public class MessagesManager implements Serializable {
private List<Message> messages = new ArrayList<>();
@Lock(LockType.READ)
public List<Message> getMessages() {
messages.add(new Message(1, "message text"));
return messages;
}
}
这个应用程序工作正常。但在测试期间发生注射错误:
org.glassfish.hk2.api.UnsatisfiedDependencyException:SystemInjecteeImpl没有可用于注入的对象(requiredType = MessagesManager,parent = MessageService,qualifiers = {},position = -1,optional = false,self = false,unqualified = NULL,1232089028)
测试代码是:
import org.glassfish.jersey.server.ResourceConfig;
import org.glassfish.jersey.test.JerseyTest;
import org.junit.Test;
import javax.ws.rs.core.Application;
import javax.ws.rs.core.Response;
import static org.junit.Assert.assertEquals;
public class RestAppTest extends JerseyTest {
@Override
protected Application configure() {
return new ResourceConfig(MessageService.class);
}
@Test
public void testGet() {
final Response response = target("messages/all").request().get();
assertEquals(200, response.getStatus());
}
}
为什么会发生以及如何解决?
答案 0 :(得分:1)
应用程序上下文中缺少类MessagesManager。将类添加到configure方法中:
return new ResourceConfig(MessageService.class, MessagesManager.class);
答案 1 :(得分:-1)
你需要几件事
1&GT;为REST API构建良好的JSON结构
2 - ;某种REST客户端,例如用于chrome,Mozilla等的高级REST客户端,可用作插件。 POSTMAN也是一个有用的工具