java - 在 Android Studio 中向现有 App Engine 后端服务器添加新端点

Question

我在本地 Android Studio 中有一个 App Engine 后端和 Google Cloud Messaging 设置。

它具有如下原始端点:

• 消息端点
• 注册端点

我创建了一个新的 Java 文件并添加了一个名为 UserRegistration 的新类，如下所示:

package com.xxxxx.gcmbackend;
import com.google.api.server.spi.config.Api;
import com.google.api.server.spi.config.ApiMethod;
import com.google.api.server.spi.config.ApiNamespace;
import com.google.api.server.spi.response.CollectionResponse;

import java.util.List;
import java.util.logging.Logger;
import javax.inject.Named;

import static com.xxxxxx.gcmbackend.OfyService.ofy;

@Api(
        name = "register",
        version = "v1",
        namespace = @ApiNamespace(
                ownerDomain = "gcmbackend.xxxxx.com",
                ownerName = "gcmbackend.xxxxx.com",
                packagePath=""
        )
)


public class UserRegistrationEndpoint {
    private static final Logger log = Logger.getLogger(RegistrationEndpoint.class.getName());
    @ApiMethod(name = "register")
    public void registerDevice(@Named("regId") String regId, @Named("username") String username, @Named("phone") String phone) {
        if(findRecord(regId) != null) {
            log.info("Device " + regId + " already registered, skipping register");
            return;
        }
        RegistrationRecord record = new RegistrationRecord();
        record.setRegId(regId);
        record.setUsername(username);
        record.setPhone(phone);
        ofy().save().entity(record).now();
    }
    private RegistrationRecord findRecord(String regId) {
        return ofy().load().type(RegistrationRecord.class).filter("regId", regId).first().now();
    }
}

但是，部署后，我在 API 资源管理器中看不到此端点。如何使用 Google Cloud Messaging 将新的工作端点添加到 App Engine 后端？

Answer 1

通过检查现有的代码结构，我发现每个新的 API 都必须添加到 web.xml 文件中。我将我的新端点添加为:

<?xml version="1.0" encoding="utf-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" version="2.5">
  <filter>
        <filter-name>ObjectifyFilter</filter-name>
        <filter-class>com.googlecode.objectify.ObjectifyFilter</filter-class>
  </filter>
  <filter-mapping>
        <filter-name>ObjectifyFilter</filter-name>
        <url-pattern></url-pattern>
  </filter-mapping>
   <servlet>
        <servlet-name>SystemServiceServlet</servlet-name>
        <servlet-class>com.google.api.server.spi.SystemServiceServlet</servlet-class>
        <init-param>
            <param-name>services</param-name>
            <param-value>com.xxxxx.gcmbackend.RegistrationEndpoint, com.xxxxx.gcmbackend.MessagingEndpoint, com.xxxxx.gcmbackend.UserRegistrationEndpoint</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>SystemServiceServlet</servlet-name>
        <url-pattern>/_ah/spi/*</url-pattern>
    </servlet-mapping>

    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
    </welcome-file-list>
</web-app>