英文:
connecting to firestore emulator from java admin sdk
问题
我正在尝试从我的Java应用程序内部连接到Firestore模拟器，但并不成功。FirebaseOptions options = FirebaseOptions.builder().setCredentials(GoogleCredentials.getApplicationDefault()).setDatabaseUrl("localhost:8082").setProjectId("xxx").build();var app = FirebaseApp.initializeApp(options);Firestore db = FirestoreClient.getFirestore(app);final ApiFuture<WriteResult> update = db.collection("users").document().set(Map.of("test", "mest"));try {final WriteResult writeResult = update.get();} catch (InterruptedException | ExecutionException e) {e.printStackTrace();}这段代码尝试连接到Firebase，忽略了数据库URL。我查看了Node SDK，它有一个“emulator”方法和数据库设置，但在Java端不存在。
英文:
I am trying to connect to firestore emulator from inside my java application, without much success.
FirebaseOptions options = FirebaseOptions.builder().setCredentials(GoogleCredentials.getApplicationDefault()).setDatabaseUrl("localhost:8082").setProjectId("xxx").build();var app = FirebaseApp.initializeApp(options);Firestore db = FirestoreClient.getFirestore(app);final ApiFuture<WriteResult> update = db.collection("users").document().set(Map.of("test", "mest"));try {final WriteResult writeResult = update.get();} catch (InterruptedException | ExecutionException e) {e.printStackTrace();}
This simply tries to connect to firebase, disregarding the database url.
I looked at the node sdk, which has a emulator method and database settings, but they don't exist on Java side.
答案1
得分: 1
如果您正在使用Firebase Admin SDK（Java），您可以使用以下代码连接到本地模拟器套件，而无需设置FIRESTORE_EMULATOR_HOST环境变量：
import com.google.cloud.firestore.FirestoreOptions;import com.google.firebase.FirebaseApp;import com.google.firebase.FirebaseOptions;import com.google.firebase.internal.EmulatorCredentials;FirestoreOptions firestoreOptions = FirestoreOptions.newBuilder()/*TODO：用模拟器正在运行的主机替换*/.setEmulatorHost("localhost:8080").build();FirebaseOptions firebaseOptions = FirebaseOptions.builder().setCredentials(new EmulatorCredentials())/*设置有效的项目ID很重要；否则，数据在模拟器界面内将不可见*/.setProjectId("[YOUR_FIREBASE_PROJECT_ID]").setFirestoreOptions(firestoreOptions).build();FirebaseApp app = FirebaseApp.initializeApp(firebaseOptions);
英文:
If you are using Firebase Admin SDK (Java), you can use following code to connect to Local Emulator Suite without setting the FIRESTORE_EMULATOR_HOST environment variable:
import com.google.cloud.firestore.FirestoreOptions;import com.google.firebase.FirebaseApp;import com.google.firebase.FirebaseOptions;import com.google.firebase.internal.EmulatorCredentials;FirestoreOptions firestoreOptions = FirestoreOptions.newBuilder()/*TODO: replace with host at which your emulator is running*/.setEmulatorHost("localhost:8080").build();FirebaseOptions firebaseOptions = FirebaseOptions.builder().setCredentials(new EmulatorCredentials())/*setting valid project-id is IMPORTANT;otherwise, data will not be visible inside Emulator UI*/.setProjectId("[YOUR_FIREBASE_PROJECT_ID]").setFirestoreOptions(firestoreOptions).build()FirebaseApp app = FirebaseApp.initializeApp(firebaseOptions)
答案2
得分: 0
根据文档：
> 当设置了FIRESTORE_EMULATOR_HOST环境变量时，Firebase Admin SDK会自动连接到Cloud Firestore模拟器：
>
>export FIRESTORE_EMULATOR_HOST="localhost:8080"
所以我猜无论传递什么主机，只要存在这个环境变量，就没有关系？
英文:
According to the documentation:
> The Firebase Admin SDKs automatically connect to the Cloud Firestore emulator when the FIRESTORE_EMULATOR_HOST environment variable is set:
>
>export FIRESTORE_EMULATOR_HOST="localhost:8080"
So I guess it doesn't matter what host you pass, so long as this environment is present?
答案3
得分: 0
我在数据库链接方面遇到了类似的问题
你可以尝试
.setDatabaseUrl("http://localhost:8082")
这对我有用。
后续编辑
使用
.setDatabaseUrl("http://localhost:8082?ns=fake-project-id")
缺少最后一部分会在后续的网络套接字中触发其他错误。
英文:
I had a similar issue with the database link
You could try
.setDatabaseUrl("http://localhost:8082")
It worked for me.
LATER EDIT
Use
.setDatabaseUrl("http://localhost:8082?ns=fake-project-id")
The lack of the last part would trigger other errors later on websockets.
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