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
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