Adding FCM sample snippets

Author: hiranya911

admin/src/main/java/com/google/firebase/example/FirebaseMessagingSnippets.java

@@ -0,0 +1,89 @@
+/*
+ * Copyright 2018 Google Inc. All Rights Reserved.
+ *
+ * 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.
+ */
+
+package com.google.firebase.example;
+
+import com.google.firebase.messaging.FirebaseMessaging;
+import com.google.firebase.messaging.Message;
+import com.google.firebase.messaging.Notification;
+
+public class FirebaseMessagingSnippets {
+
+  public void sendToToken() throws Exception {
+    // [START send_to_token]
+    // This registration token comes from the client FCM SDKs.
+    String registrationToken = "bk3RNwTe3H0:CI2k_HHwgIpoDKCIZvvDMExUdFQ3P1...";
+
+    // See the "Defining the message" section below for details
+    // on how to define a message payload.
+    Message message = Message.builder()
+        .putData("score", "850")
+        .putData("time", "2:45")
+        .setToken(registrationToken)
+        .build();
+
+    // Send a message to the device corresponding to the provided
+    // registration token.
+    String response = FirebaseMessaging.getInstance().sendAsync(message).get();
+    // Response is a message ID string.
+    System.out.println("Successfully sent message: " + response);
+    // [END send_to_token]
+  }
+
+  public void sendToTopic() throws Exception {
+    // [START send_to_topic]
+    // The topic name can be optionally prefixed with "/topics/".
+    String topic = "highScores";
+
+    // See the "Defining the message" section below for details
+    // on how to define a message payload.
+    Message message = Message.builder()
+        .putData("score", "850")
+        .putData("time", "2:45")
+        .setTopic(topic)
+        .build();
+
+    // Send a message to the devices subscribed to the provided topic.
+    String response = FirebaseMessaging.getInstance().sendAsync(message).get();
+    // Response is a message ID string.
+    System.out.println("Successfully sent message: " + response);
+    // [END send_to_topic]
+  }
+
+  public void sendToCondition() throws Exception {
+    // [START send_to_condition]
+    // Define a condition which will send to devices which are subscribed
+    // to either the Google stock or the tech industry topics.
+    String condition = "'stock-GOOG' in topics || 'industry-tech' in topics";
+
+    // See the "Defining the message" section below for details
+    // on how to define a message payload.
+    Message message = Message.builder()
+        .setNotification(new Notification(
+            "$GOOG up 1.43% on the day",
+            "$GOOG gained 11.80 points to close at 835.67, up 1.43% on the day."))
+        .setCondition(condition)
+        .build();
+
+    // Send a message to devices subscribed to the combination of topics
+    // specified by the provided condition.
+    String response = FirebaseMessaging.getInstance().sendAsync(message).get();
+    // Response is a message ID string.
+    System.out.println("Successfully sent message: " + response);
+    // [END send_to_condition]
+  }
+
+}