Q&A
これはどこでどうやって動かしましたか？
お世話になっております。
今回、表題の件に関しまして質問させていただきます。
package firebase.sample; import java.io.FileInputStream; import java.util.HashMap; import java.util.List; import java.util.Map; /* * Copyright 2017 Google Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import com.google.api.core.ApiFuture; import com.google.auth.oauth2.GoogleCredentials; import com.google.cloud.firestore.DocumentReference; // [START fs_include_dependencies] import com.google.cloud.firestore.Firestore; import com.google.cloud.firestore.FirestoreOptions; // [END fs_include_dependencies] import com.google.cloud.firestore.QueryDocumentSnapshot; import com.google.cloud.firestore.QuerySnapshot; import com.google.cloud.firestore.WriteResult; import com.google.common.collect.ImmutableMap; import com.google.firebase.FirebaseApp; import com.google.firebase.FirebaseOptions; /** * A simple Quick start application demonstrating how to connect to Firestore * and add and query documents. */ public class Quickstart { private Firestore db; /** * Initialize Firestore using default project ID. */ public Quickstart() { // [START fs_initialize] Firestore db = FirestoreOptions.getDefaultInstance().getService(); // [END fs_initialize] this.db = db; } public Quickstart(String projectId) { // [START fs_initialize_project_id] FirestoreOptions firestoreOptions = FirestoreOptions.getDefaultInstance().toBuilder() .setProjectId(projectId) .build(); Firestore db = firestoreOptions.getService(); // [END fs_initialize_project_id] this.db = db; } Firestore getDb() { return db; } /** * Add named test documents with fields first, last, middle (optional), born. * * @param docName document name */ void addDocument(String docName) throws Exception { switch (docName) { case "alovelace": { // [START fs_add_data_1] DocumentReference docRef = db.collection("users").document("alovelace"); // Add document data with id "alovelace" using a hashmap Map<String, Object> data = new HashMap<>(); data.put("first", "Ada"); data.put("last", "Lovelace"); data.put("born", 1815); //asynchronously write data ApiFuture<WriteResult> result = docRef.set(data); // ... // result.get() blocks on response System.out.println("Update time : " + result.get().getUpdateTime()); // [END fs_add_data_1] break; } case "aturing": { // [START fs_add_data_2] DocumentReference docRef = db.collection("users").document("aturing"); // Add document data with an additional field ("middle") Map<String, Object> data = new HashMap<>(); data.put("first", "Alan"); data.put("middle", "Mathison"); data.put("last", "Turing"); data.put("born", 1912); ApiFuture<WriteResult> result = docRef.set(data); System.out.println("Update time : " + result.get().getUpdateTime()); // [END fs_add_data_2] break; } case "cbabbage": { DocumentReference docRef = db.collection("users").document("cbabbage"); Map<String, Object> data = new ImmutableMap.Builder<String, Object>() .put("first", "Charles") .put("last", "Babbage") .put("born", 1791) .build(); ApiFuture<WriteResult> result = docRef.set(data); System.out.println("Update time : " + result.get().getUpdateTime()); break; } default: } } void runAQuery() throws Exception { // [START fs_add_query] // asynchronously query for all users born before 1900 ApiFuture<QuerySnapshot> query = db.collection("users").whereLessThan("born", 1900).get(); // ... // query.get() blocks on response QuerySnapshot querySnapshot = query.get(); List<QueryDocumentSnapshot> documents = querySnapshot.getDocuments(); for (QueryDocumentSnapshot document : documents) { System.out.println("User: " + document.getId()); System.out.println("First: " + document.getString("first")); if (document.contains("middle")) { System.out.println("Middle: " + document.getString("middle")); } System.out.println("Last: " + document.getString("last")); System.out.println("Born: " + document.getLong("born")); } // [END fs_add_query] } void retrieveAllDocuments() throws Exception { // [START fs_get_all] // asynchronously retrieve all users ApiFuture<QuerySnapshot> query = db.collection("users").get(); // ... // query.get() blocks on response QuerySnapshot querySnapshot = query.get(); List<QueryDocumentSnapshot> documents = querySnapshot.getDocuments(); for (QueryDocumentSnapshot document : documents) { System.out.println("User: " + document.getId()); System.out.println("First: " + document.getString("first")); if (document.contains("middle")) { System.out.println("Middle: " + document.getString("middle")); } System.out.println("Last: " + document.getString("last")); System.out.println("Born: " + document.getLong("born")); } // [END fs_get_all] } void run() throws Exception { String[] docNames = {"alovelace", "aturing", "cbabbage"}; // Adding document 1 System.out.println("########## Adding document 1 ##########"); addDocument(docNames[0]); // Adding document 2 System.out.println("########## Adding document 2 ##########"); addDocument(docNames[1]); // Adding document 3 System.out.println("########## Adding document 3 ##########"); addDocument(docNames[2]); // retrieve all users born before 1900 System.out.println("########## users born before 1900 ##########"); runAQuery(); // retrieve all users System.out.println("########## All users ##########"); retrieveAllDocuments(); System.out.println("###################################"); } /** * A quick start application to get started with Firestore. * * @param args firestore-project-id (optional) */ public static void main(String[] args) throws Exception { FileInputStream serviceAccount; try { serviceAccount = new FileInputStream("nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn.json"); FirebaseOptions options = new FirebaseOptions.Builder() .setCredentials(GoogleCredentials.fromStream(serviceAccount)) .setDatabaseUrl("llllllllllllllllllllllll") .build(); FirebaseApp.initializeApp(options); System.out.println("あいうえお"); } catch ( Exception e) { e.printStackTrace(); } // default project is will be used if project-id argument is not available // String projectId = (args.length == 0) ? null : args[0]; String projectId = "aaaaaa" ; Quickstart quickStart = (projectId != null) ? new Quickstart(projectId) : new Quickstart(); quickStart.run(); } }
エラーコード（コンソール）
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". SLF4J: Defaulting to no-operation (NOP) logger implementation SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details. あいうえお 情報: Failed to detect whether we are running on Google Compute Engine. [火 5月 19 19:04:55 JST 2020] Exception in thread "main" java.lang.NullPointerException at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:888) at com.google.cloud.ServiceOptions$Builder.setCredentials(ServiceOptions.java:210) at com.google.cloud.firestore.FirestoreOptions$Builder.build(FirestoreOptions.java:223) at firebase.sample.Quickstart.<init>(Quickstart.java:64) at firebase.sample.Quickstart.main(Quickstart.java:222)
やりたいこととして、firestoreにデータをアップデートならびに取得したいと考えています。
よろしくお願いいたします。
nnn...n.json も、ご提示ください。
このファイルを正確に作成していないと、正常に動かないと思います。
自己解決
