我正在尝试在我编写的在Grizzly上运行的Servlet中掌握一些注入的上下文（例如Session或HttpServletRequest），但我似乎无济于事。整个过程似乎因以下错误而过早地停顿：
SEVERE: Missing dependency for field: javax.servlet.http.HttpServletRequest com.test.server.LolCat.hsr
服务器非常简单，它包含两个文件，静态入口点（Main.java）：
package com.test.server;
import java.io.IOException;
import java.net.URI;
import javax.ws.rs.core.UriBuilder;
import org.glassfish.grizzly.http.server.HttpServer;
import com.sun.jersey.api.container.grizzly2.GrizzlyServerFactory;
import com.sun.jersey.api.core.ClassNamesResourceConfig;
import com.sun.jersey.api.core.ResourceConfig;
public class Main {
private static URI getBaseURI() {
return UriBuilder.fromUri("http://localhost/").port(8080).build();
}
public static final URI BASE_URI = getBaseURI();
public static void main(String[] args) throws IOException {
ResourceConfig rc = new ClassNamesResourceConfig(LolCat.class);
HttpServer httpServer = GrizzlyServerFactory.createHttpServer(BASE_URI, rc);
System.in.read();
httpServer.stop();
}
}
和Serlvet（LolCat.java）：
package com.test.server;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.core.Context;
@Path(value = "/lol")
public class LolCat {
@Context HttpServletRequest hsr;
@GET
@Path(value="/cat")
public String list() {
return "meow";
}
}
特别是，上述源文件中的@ Context-line是我所有问题的来源和解决方案。我需要它，并且根据我所读到的有关Jersey和Servlet的所有内容，它应该可以工作，但是可惜没有。我也尝试过使用GrizzlyWebContainerFactory代替GrizzlyServerFactory，但无济于事。
供参考，使用以下依赖项编译项目：
此主类对我来说效果很好：
package com.test.server;
import com.sun.jersey.api.container.grizzly2.GrizzlyServerFactory;
import java.io.IOException;
import java.net.URI;
import javax.ws.rs.core.UriBuilder;
import com.sun.jersey.api.core.ClassNamesResourceConfig;
import com.sun.jersey.spi.container.servlet.ServletContainer;
import org.glassfish.grizzly.http.server.HttpHandler;
import org.glassfish.grizzly.http.server.HttpServer;
import org.glassfish.grizzly.http.server.Request;
import org.glassfish.grizzly.http.server.Response;
import org.glassfish.grizzly.servlet.ServletRegistration;
import org.glassfish.grizzly.servlet.WebappContext;
public class Main {
private static final String JERSEY_SERVLET_CONTEXT_PATH = "";
private static URI getBaseURI() {
return UriBuilder.fromUri("http://localhost").port(8080).path("/").build();
}
public static final URI BASE_URI = getBaseURI();
public static void main(String[] args) throws IOException {
// Create HttpServer and register dummy "not found" HttpHandler
HttpServer httpServer = GrizzlyServerFactory.createHttpServer(BASE_URI, new HttpHandler() {
@Override
public void service(Request rqst, Response rspns) throws Exception {
rspns.setStatus(404, "Not found");
rspns.getWriter().write("404: not found");
}
});
// Initialize and register Jersey Servlet
WebappContext context = new WebappContext("WebappContext", JERSEY_SERVLET_CONTEXT_PATH);
ServletRegistration registration = context.addServlet("ServletContainer", ServletContainer.class);
registration.setInitParameter(ServletContainer.RESOURCE_CONFIG_CLASS,
ClassNamesResourceConfig.class.getName());
registration.setInitParameter(ClassNamesResourceConfig.PROPERTY_CLASSNAMES, LolCat.class.getName());
registration.addMapping("/*");
context.deploy(httpServer);
System.in.read();
httpServer.stop();
}
}
在浏览器中尝试http://localhost:8080/lol/cat。您可以更改JERSEY_SERVLET_CONTEXT_PATH来更新Servlet的上下文路径。
根据开发人员的解释-Grizzly不完全符合JAX-RS 2.0，因此不会有正式的上下文注入/包装。见Jersey Bug-1960适用于Jersey + Grizzly版本2.7 +
幸运的是，有一种方法可以注入Grizzly请求/响应对象。有点棘手但有效Jersey的单元测试之一中提供的代码示例。参见Jersey container test
所以代码片段将是：
import javax.inject.Inject;
import javax.inject.Provider;
public someclass {
@Inject
private Provider<Request> grizzlyRequestProvider;
public void method() {
if (grizzlyRequestProvider != null) {
Request httpRequest = grizzlyRequestProvider.get();
// Extract what you need
}
}
}
同时适用于过滤器和服务方法
您也可以手动注册ResourceContext
HttpServer httpServer = GrizzlyHttpServerFactory.createHttpServer(getBaseURI());
WebappContext context = new WebappContext("WebappContext", "/api");
ServletRegistration registration = context.addServlet("ServletContainer",
new ServletContainer(config));
registration.addMapping("/*");
context.deploy(httpServer);
其中config是您的资源上下文。
尝试这样的事情：-
public class Main {
private static URI getBaseURI() {
return UriBuilder.fromUri("http://localhost/").port(8080).build();
}
public static void main(String[] args) throws IOException {
ResourceConfig rc = new ResourceConfig().packages("com.example");//path to you class files
HttpServer httpServer = GrizzlyHttpServerFactory.createHttpServer(getBaseURI(), rc);
System.in.read();
httpServer.stop();
}
}