与Jersey客户端版本2.2的Restful Web Service调用

时间:2013-08-23 08:07:00

标签: java rest jpa eclipselink jersey-client

CASE

我正在尝试使用REST服务将用户数据提取到Servlet过滤器。

的pom.xml

<dependency>
        <groupId>org.glassfish.jersey.containers</groupId>
        <artifactId>jersey-container-servlet</artifactId>
        <version>2.2</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>javax.ws.rs</groupId>
        <artifactId>javax.ws.rs-api</artifactId>
        <version>2.0</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>org.glassfish.jersey.core</groupId>
        <artifactId>jersey-client</artifactId>
        <version>2.2</version>
        <scope>provided</scope>
    </dependency>

CODE

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {

    Client client = ClientBuilder.newClient(new ClientConfig());

    String entity = client.target("http://localhost:8080/insame/webresources/com.insame.entity.users")
        .path("count")
        .request(MediaType.TEXT_PLAIN)
        .get(String.class);

    System.out.println("entity-------->" +entity);

REST:

@GET
@Path("count")
@Produces("text/plain")
public String countREST() {
    return String.valueOf(super.count());
}

问题

javax.ws.rs.ProcessingException: java.net.SocketException: Unexpected end of file from server
at org.glassfish.jersey.client.HttpUrlConnector.apply(HttpUrlConnector.java:202)
at org.glassfish.jersey.client.ClientRuntime.invoke(ClientRuntime.java:215)
at org.glassfish.jersey.client.JerseyInvocation$2.call(JerseyInvocation.java:650)

WARNING:   StandardWrapperValve[com.insame.service.ApplicationConfig]: Servlet.service() for servlet com.insame.service.ApplicationConfig threw exception
javax.ws.rs.InternalServerErrorException: HTTP 500 Internal Server Error
    at org.glassfish.jersey.client.JerseyInvocation.convertToException(JerseyInvocation.java:904)
    at org.glassfish.jersey.client.JerseyInvocation.translate(JerseyInvocation.java:749)
    at org.glassfish.jersey.client.JerseyInvocation.access$500(JerseyInvocation.java:88)
    at org.glassfish.jersey.client.JerseyInvocation$2.call(JerseyInvocation.java:650)

问题

0)我的代码出了什么问题?

1)使用servlet过滤器获取数据的最明智的方法是什么             REST + JPA?

2)如果有另一种方法可以做到这一点,我的意思是,         请告诉我?

3)泽西岛客户端是唯一的方式

4)我怎么能         获取EntityManager并直接从过滤器调用其余服务         没有泽西岛客户?

Jersey文档和示例: http://jersey.java.net/documentation/latest/user-guide.html#d0e2481

谢谢, 萨米

1 个答案:

答案 0 :(得分:0)

0)500错误代码表示服务器端出现了一些问题。即使REST被处理,可能是动作操作引发了一些错误。 1)对于简单的REST,我使用了Restlet和HttpClient。甚至jerseyClient与JAXB一起处理响应为POJO。根据我的经验,简单的HTTP是处理REST响应的最佳和最简单的方法。您可以轻松地在http代码(java.net)上编写一个包装器来处理请求/响应,围绕它创建Dom 2)和3)在上面回答