Delay initialization of the Firestore client (#109)

google-cloud-graalvm-samples/graalvm-samples-client-library/firestore-sample/src/main/java/com/example/FirestoreSampleApplication.java

@@ -17,6 +17,7 @@
 package com.example;
 
 import com.google.api.core.ApiFuture;
+import com.google.cloud.firestore.CollectionReference;
 import com.google.cloud.firestore.DocumentReference;
 import com.google.cloud.firestore.FieldPath;
 import com.google.cloud.firestore.Firestore;
@@ -45,6 +46,7 @@ public static void main(String[] args) throws Exception {
 
     deleteCollection(db);
     createUserDocument(db);
+    createUserDocumentPojo(db);
     readDocuments(db);
     runSampleQueries(db);
   }
@@ -54,12 +56,12 @@ private static void deleteCollection(Firestore db) throws Exception {
     for (DocumentReference doc : documents) {
       doc.delete().get();
     }
-
   }
 
   private static void createUserDocument(Firestore db) throws Exception {
     DocumentReference docRef = db.collection(USERS_COLLECTION).document("alovelace");
     Map<String, Object> data = new HashMap<>();
+    data.put("id", "10");
     data.put("first", "Ada");
     data.put("last", "Lovelace");
     data.put("born", 1815);
@@ -68,6 +70,16 @@ private static void createUserDocument(Firestore db) throws Exception {
     System.out.println("Created user " + docRef.getId() + ". Timestamp: " + result.getUpdateTime());
   }
 
+  private static void createUserDocumentPojo(Firestore db) throws Exception {
+    CollectionReference collectionReference = db.collection(USERS_COLLECTION);
+    WriteResult result =
+        collectionReference.document()
+            .set(new Person("Alan", "Turing", 1912))
+            .get();
+
+    System.out.println("Created user by POJO. Timestamp: " + result.getUpdateTime());
+  }
+
   private static void readDocuments(Firestore db) throws Exception {
     ApiFuture<QuerySnapshot> query = db.collection(USERS_COLLECTION).get();
     QuerySnapshot querySnapshot = query.get();

google-cloud-graalvm-samples/graalvm-samples-client-library/firestore-sample/src/main/java/com/example/Person.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * 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
+ *
+ *     https://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.
+ */
+
+package com.example;
+
+import com.google.cloud.firestore.annotation.DocumentId;
+
+/**
+ * Simple document object to load into Firestore.
+ */
+public class Person {
+
+  @DocumentId
+  public String id;
+
+  public String first;
+
+  public String last;
+
+  public int born;
+
+  Person(String first, String last, int born) {
+    this.first = first;
+    this.last = last;
+    this.born = born;
+  }
+}

google-cloud-graalvm-samples/graalvm-samples-client-library/firestore-sample/src/main/resources/META-INF/native-image/reflect-config.json

@@ -0,0 +1,8 @@
+[
+  {
+    "name" : "com.example.Person",
+    "allDeclaredConstructors" : true,
+    "allDeclaredMethods" : true,
+    "allDeclaredFields" : true
+  }
+]

google-cloud-graalvm-support/src/main/resources/META-INF/native-image/com.google.cloud/google-cloud-graalvm-support/native-image.properties

@@ -9,4 +9,5 @@ Args = -H:+AllowIncompleteClasspath --report-unsupported-elements-at-runtime \
     io.grpc.netty.shaded.io.grpc.netty,\
     io.grpc.netty.shaded.io.netty.channel.epoll,\
     io.grpc.netty.shaded.io.netty.channel.unix,\
-    com.google.api.client.googleapis.services.AbstractGoogleClientRequest$ApiClientVersion
+    com.google.api.client.googleapis.services.AbstractGoogleClientRequest$ApiClientVersion,\
+    com.google.cloud.firestore.FirestoreImpl