java - JavaEE 和 Firebase admin sdk - setValueAsync 不将数据推送到实时 Firebase
问题描述
我在基于 gradle 和 glassfish 服务器的 intellij 上使用 firebase admin sdk 和 JavaEE。
我试图将一个值推送到实时数据库,但遗憾的是我无法这样做。我已经在网上搜索了几个星期,但什么也没得到。我还在stackoverflow答案中遵循了一些解决方案,例如:Firebase Java Admin SDK don't work but nothing for me。
我已经阅读了很多为什么 firebase admin sdk 会出现这种问题的原因,但我没有解决方案。
这是我的代码:
包装样品;
package sample;
import com.google.api.core.ApiFuture;
import com.google.auth.oauth2.GoogleCredentials;
import com.google.firebase.FirebaseApp;
import com.google.firebase.FirebaseOptions;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseToken;
import com.google.firebase.auth.UserRecord;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import sample.model.FireBaseAuth;
import sample.model.FireBaseUtils;
import sample.model.Owner;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
@WebServlet("/success")
public class SuccessServlet extends HttpServlet {
public void init() throws ServletException {
super.init();
FireBaseUtils.initilizeFirebase();
}
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
String email = request.getParameter("email");
String password = request.getParameter("pass");
//System.out.println(name);
try{
//a hashmap for the number of shopsOwned
HashMap<String, String> shopsOwned = new HashMap<>();
shopsOwned.put("shopName" , "shopName");
//get the database instance and the database reference
FirebaseDatabase database = FirebaseDatabase.getInstance();
DatabaseReference ref = database.getReference("Business");
DatabaseReference ownersRef = ref.child("Owners"); //further get the reference to the owners node
//create a new owner with the values of the new user, using the Owner class
Owner newOwner = new Owner("userRecord2.getUid()", "userRecord2.getDisplayName()",
"userRecord2.getPhoneNumber()", "userRecord2.getEmail()", shopsOwned);
//create a hashmap of the users, in this case, just one user
Map<String, Owner> users = new HashMap<>();
users.put("userRecord2getPhoneNumber", newOwner); //add the new owner to the hashmap
System.out.println("this is the user :" + newOwner.getFull_name());
//push the new owner hashmap to the database reference
ApiFuture<Void> future = ownersRef.push().setValueAsync(users);
//Object o = future.get(8, TimeUnit.SECONDS);
System.out.println(future.isDone());
//System.out.println(future.isDone());
request.getRequestDispatcher("success.jsp").forward(request, response);
}catch(Exception e){e.printStackTrace();}
}
@Override
public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
doGet(request, response);
}
}
任何想法将不胜感激。
编辑:我没有收到任何错误,webapp 运行正常,但 firebase 的实时数据库没有更新
解决方案
在请求线程返回之前,您需要等到未来完成。否则无法保证更新完成,任何错误都会被默默丢弃。因此,请尝试以下操作:
ApiFuture<Void> future = ownersRef.push().setValueAsync(users);
future.get();
request.getRequestDispatcher("success.jsp").forward(request, response);
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