// This registration token comes from the client FCM SDKs.constregistrationToken='YOUR_REGISTRATION_TOKEN';constmessage={data:{score:'850',time:'2:45'},token:registrationToken};// Send a message to the device corresponding to the provided// registration token.getMessaging().send(message).then((response)=>{// Response is a message ID string.console.log('Successfully sent message:',response);}).catch((error)=>{console.log('Error sending message:',error);});

// This registration token comes from the client FCM SDKs.StringregistrationToken="YOUR_REGISTRATION_TOKEN";// See documentation on defining a message payload.Messagemessage=Message.builder().putData("score","850").putData("time","2:45").setToken(registrationToken).build();// Send a message to the device corresponding to the provided// registration token.Stringresponse=FirebaseMessaging.getInstance().send(message);// Response is a message ID string.System.out.println("Successfully sent message: "+response);
FirebaseMessagingSnippets.java

# This registration token comes from the client FCM SDKs.registration_token='YOUR_REGISTRATION_TOKEN'# See documentation on defining a message payload.message=messaging.Message(data={'score':'850','time':'2:45',},token=registration_token,)# Send a message to the device corresponding to the provided# registration token.response=messaging.send(message)# Response is a message ID string.print('Successfully sent message:',response)
cloud_messaging.py

// Obtain a messaging.Client from the App.ctx:=context.Background()client,err:=app.Messaging(ctx)iferr!=nil{log.Fatalf("error getting Messaging client: %v\n",err)}// This registration token comes from the client FCM SDKs.registrationToken:="YOUR_REGISTRATION_TOKEN"// See documentation on defining a message payload.message:=&messaging.Message{Data:map[string]string{"score":"850","time":"2:45",},Token:registrationToken,}// Send a message to the device corresponding to the provided// registration token.response,err:=client.Send(ctx,message)iferr!=nil{log.Fatalln(err)}// Response is a message ID string.fmt.Println("Successfully sent message:",response)
messaging.go

// This registration token comes from the client FCM SDKs.varregistrationToken="YOUR_REGISTRATION_TOKEN";// See documentation on defining a message payload.varmessage=newMessage(){Data=newDictionary<string,string>(){{"score","850"},{"time","2:45"},},Token=registrationToken,};// Send a message to the device corresponding to the provided// registration token.stringresponse=awaitFirebaseMessaging.DefaultInstance.SendAsync(message);// Response is a message ID string.Console.WriteLine("Successfully sent message: "+response);

// These registration tokens come from the client FCM SDKs.constregistrationTokens=['YOUR_REGISTRATION_TOKEN_1',// …'YOUR_REGISTRATION_TOKEN_N',];constmessage={data:{score:'850',time:'2:45'},tokens:registrationTokens,};getMessaging().sendEachForMulticast(message).then((response)=>{if(response.failureCount >0){constfailedTokens=[];response.responses.forEach((resp,idx)=>{if(!resp.success){failedTokens.push(registrationTokens[idx]);}});console.log('List of tokens that caused failures: '+failedTokens);}});

// These registration tokens come from the client FCM SDKs.List<String>registrationTokens=Arrays.asList("YOUR_REGISTRATION_TOKEN_1",// ..."YOUR_REGISTRATION_TOKEN_n");MulticastMessagemessage=MulticastMessage.builder().putData("score","850").putData("time","2:45").addAllTokens(registrationTokens).build();BatchResponseresponse=FirebaseMessaging.getInstance().sendEachForMulticast(message);if(response.getFailureCount() >0){List<SendResponse>responses=response.getResponses();List<String>failedTokens=newArrayList<>();for(inti=0;i <responses.size();i++){if(!responses.get(i).isSuccessful()){// The order of responses corresponds to the order of the registration tokens.failedTokens.add(registrationTokens.get(i));}}System.out.println("List of tokens that caused failures: "+failedTokens);}
FirebaseMessagingSnippets.java

# These registration tokens come from the client FCM SDKs.registration_tokens=['YOUR_REGISTRATION_TOKEN_1',# ...'YOUR_REGISTRATION_TOKEN_N',]message=messaging.MulticastMessage(data={'score':'850','time':'2:45'},tokens=registration_tokens,)response=messaging.send_each_for_multicast(message)ifresponse.failure_count >0:responses=response.responsesfailed_tokens=[]foridx,respinenumerate(responses):ifnotresp.success:# The order of responses corresponds to the order of the registration tokens.failed_tokens.append(registration_tokens[idx])print(f'List of tokens that caused failures:{failed_tokens}')
cloud_messaging.py

// Create a list containing up to 500 registration tokens.// This registration tokens come from the client FCM SDKs.registrationTokens:=[]string{"YOUR_REGISTRATION_TOKEN_1",// ..."YOUR_REGISTRATION_TOKEN_n",}message:=&messaging.MulticastMessage{Data:map[string]string{"score":"850","time":"2:45",},Tokens:registrationTokens,}br,err:=client.SendEachForMulticast(context.Background(),message)iferr!=nil{log.Fatalln(err)}ifbr.FailureCount >0{varfailedTokens[]stringforidx,resp:=rangebr.Responses{if!resp.Success{// The order of responses corresponds to the order of the registration tokens.failedTokens=append(failedTokens,registrationTokens[idx])}}fmt.Printf("List of tokens that caused failures: %v\n",failedTokens)}
messaging.go

// These registration tokens come from the client FCM SDKs.varregistrationTokens=newList<string>(){"YOUR_REGISTRATION_TOKEN_1",// ..."YOUR_REGISTRATION_TOKEN_n",};varmessage=newMulticastMessage(){Tokens=registrationTokens,Data=newDictionary<string,string>(){{"score","850"},{"time","2:45"},},};varresponse=awaitFirebaseMessaging.DefaultInstance.SendEachForMulticastAsync(message);if(response.FailureCount >0){varfailedTokens=newList<string>();for(vari=0;i <response.Responses.Count;i++){if(!response.Responses[i].IsSuccess){// The order of responses corresponds to the order of the registration tokens.failedTokens.Add(registrationTokens[i]);}}Console.WriteLine($"List of tokens that caused failures: {failedTokens}");}
FirebaseMessagingSnippets.cs

// Create a list containing up to 500 messages.constmessages=[];messages.push({notification:{title:'Price drop',body:'5% off all electronics'},token:registrationToken,});messages.push({notification:{title:'Price drop',body:'2% off all books'},topic:'readers-club',});getMessaging().sendEach(messages).then((response)=>{console.log(response.successCount+' messages were sent successfully');});

// Create a list containing up to 500 messages.List<Message>messages=Arrays.asList(Message.builder().setNotification(Notification.builder().setTitle("Price drop").setBody("5% off all electronics").build()).setToken(registrationToken).build(),// ...Message.builder().setNotification(Notification.builder().setTitle("Price drop").setBody("2% off all books").build()).setTopic("readers-club").build());BatchResponseresponse=FirebaseMessaging.getInstance().sendEach(messages);// See the BatchResponse reference documentation// for the contents of response.System.out.println(response.getSuccessCount()+" messages were sent successfully");
FirebaseMessagingSnippets.java

# Create a list containing up to 500 messages.messages=[messaging.Message(notification=messaging.Notification('Price drop','5% off all electronics'),token=registration_token,),# ...messaging.Message(notification=messaging.Notification('Price drop','2% off all books'),topic='readers-club',),]response=messaging.send_each(messages)# See the BatchResponse reference documentation# for the contents of response.print(f'{response.success_count} messages were sent successfully')
cloud_messaging.py

// Create a list containing up to 500 messages.messages:=[]*messaging.Message{{Notification:&messaging.Notification{Title:"Price drop",Body:"5% off all electronics",},Token:registrationToken,},{Notification:&messaging.Notification{Title:"Price drop",Body:"2% off all books",},Topic:"readers-club",},}br,err:=client.SendEach(context.Background(),messages)iferr!=nil{log.Fatalln(err)}// See the BatchResponse reference documentation// for the contents of response.fmt.Printf("%d messages were sent successfully\n",br.SuccessCount)
messaging.go

// Create a list containing up to 500 messages.varmessages=newList<Message>(){newMessage(){Notification=newNotification(){Title="Price drop",Body="5% off all electronics",},Token=registrationToken,},newMessage(){Notification=newNotification(){Title="Price drop",Body="2% off all books",},Topic="readers-club",},};varresponse=awaitFirebaseMessaging.DefaultInstance.SendEachAsync(messages);// See the BatchResponse reference documentation// for the contents of response.Console.WriteLine($"{response.SuccessCount} messages were sent successfully");
FirebaseMessagingSnippets.cs