App Engine에서 Firebase Admin 초기화하기 Java

Question

Android에서 토큰을 확인하기 위해 App Engine 표준 Java에서 Firebase Auth를 사용하려고합니다.

그러나 Firebase admin을 초기화하려고하면 예외가 발생합니다.

InputStream in = filterConfig.getServletContext() 
      .getResourceAsStream("/WEB-INF/PRIVATE_KEY_JSON.json"); 

FirebaseOptions options = null; 
try { 
    options = new FirebaseOptions.Builder() 
      .setCredentials(GoogleCredentials.fromStream(in)) 
      .build(); 
} catch (IOException e) { 
    e.printStackTrace(); 
} 
FirebaseApp.initializeApp(options); 

: 여기

dependencies { 
    appengineSdk 'com.google.appengine:appengine-java-sdk:1.9.60' 
    compile 'com.google.appengine.tools:appengine-gcs-client:0.7' 
    compile ('com.google.firebase:firebase-admin:5.7.0') { 
     exclude group: 'com.google.guava' 
    } 
    compile 'com.google.guava:guava:23.0' 
    compile 'javax.servlet:servlet-api:2.5' 
} 

코드입니다 : 여기

내 Gradle을 때문에 구아바 버전 충돌,

java.lang.NoSuchMethodError: 
com.google.common.base.Preconditions.checkState 
(ZLjava/lang/String;Ljava/lang/Object;)V 
at com.google.firebase.FirebaseApp.checkNotDeleted (FirebaseApp.java:352) 
at com.google.firebase.FirebaseApp.getOptions (FirebaseApp.java:267) 
at com.google.firebase.FirebaseApp$TokenRefresher.<init> (FirebaseApp.java:434) 
at com.google.firebase.FirebaseApp$TokenRefresher$Factory.create (FirebaseApp.java:535) 
at com.google.firebase.FirebaseApp.<init> (FirebaseApp.java:113) 
at com.google.firebase.FirebaseApp.initializeApp (FirebaseApp.java:201) 
at com.google.firebase.FirebaseApp.initializeApp (FirebaseApp.java:188) 
at com.google.firebase.FirebaseApp.initializeApp (FirebaseApp.java:175) 

대부분의 경우 : 여기

는 예외

Answer 1

솔루션은 링크

https://github.com/firebase/firebase-admin-java/pull/125