I am really rookie and need an advice.
I have read documentation, and as far as i understood if you need send direct message, follow next steps:
Make authentification, eventually you get Firebase TokenId and
userId
Send them to your server side and store it in DB
When you are going to send a message you need create json and put
inside topic text and resipent userId so on...
Send this json via HTTP to your server side
When server retrive this json, it should use Firebase API to
create new message bloc child with random name in firebase
Eventually server have to find recipent user in DB by userId that we get from message.
After server will find current recipent user by userId , next we should take firebase tokenId In order to sent notification .
And send recipent user notification with such data - name of new
message bloc child
Recipent will connect to this current bloc and retrive data
It is as i understood this consept, fix me please if smth wrong?
Your suggested approach sounds good. The most important thing to realize is that you require an app server to send a downstream message to a device. Using the database as the communication mechanism between the app and the app server is a popular approach.
You could also use Cloud Messaging's upstream capabilities. But I've never tried that approach, because the database works fine for me and I had little interest in learning yet another protocol (XMPP).
You can read how I implemented it in this Firebase blog post Sending notifications between Android devices with Firebase Database and Cloud Messaging.
Related
What I really need to accomplish is an instant messaging feature using Firebase.
I've been reading the Firebase Cloud Messaging docs, but I get very confused about the pourposes of the example codes on the server side.
I thought about this solution:
Send a message on the client app to Firebase via RemoteMessage.send()
On Firebase, I catch that message and "redirect" it to the message reciever, who is another client of the app.
In my client app I have this code that I took from the documentation (Firebase was previously initialized):
instance.send(new RemoteMessage.Builder(senderID + "#fcm.googleapis.com")
.setMessageId(Integer.toString(messageID))
.addData("message", message)
.addData("action", "SAY_HELLO")
.build());
That would be the first part of the solution, but now I'm stuck on the part of the code where Firebase should "catch" the message and sends it to another user.
I was trying to write a node.js function to accomplish this, but the problem is that I don't know what is triggered when Firebase gets a RemoteMessage.
Would you mind explaining me how can I do this?
Any code example will be welcome. Thanks :)
I already have an app and I want to start sending notification to the users. I already set up everything in the app(using react native) and I checked manually that I can send notification to the devices and it works.
Now I want to run a job in the server who will push the message (with the device token) to the cloud messaging in firebase.
I can't find a lot of details about how to do it. I would like if someone can give me any guide I can use with. my server is in Kotlin(java can be good too) and I m working with gradle.
Thank you so much for the help
From a Java server you can use the Firebase Admin SDK to send messages. From that documentation comes this minimal example:
// This registration token comes from the client FCM SDKs.
String registrationToken = "YOUR_REGISTRATION_TOKEN";
// See documentation on defining 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().send(message);
// Response is a message ID string.
System.out.println("Successfully sent message: " + response);
Note that this sends a data message, so that will always be delivered to your code, where you can decide to display a notification or not. To send a notification message, which is what the Firebase console does, you'd use:
Message message = Message.builder()
.setNotification(new Notification("This is the title", "This is the body"))
.setToken(registrationToken)
.build();
Both of these send the message to a specific registration token, so only to a single device/app instance. This means you will need to maintain a list of these tokens, in a way that allows you to send the messages to fit your needs. E.g. a common way is to store the tokens per user. For an example of that, see the functions-samples repo. While this example is in Node.js, the same logic could be applied to a Java server.
Finally: you can also send message to topics. For an example of that (again: using a Node.js server), have a look at this blog post Sending notifications between Android devices with Firebase Database and Cloud Messaging.
I'm using azure-notificationhubs-java-backend to send notifications to Azure hub. I have Azure tags created per application user. Business require me to send notification to multiple users (this part is achieved), and report back the execution status, i.e. whom Azure was able to deliver the notification, and who all were missed (so that other communication can be made with those users). We've this scenario that not all users are yet registered with Azure. Below is the call I am making:
SyncCallback<NotificationOutcome> callback = new SyncCallback<>();
notificationHub.sendNotificationAsync(templateNotification, recipientTags, callback);
NotificationOutcome outcome = callback.getResult();
// outcome has just the notificationId, and trackingId
Any suggestion how can I get success and failed tags. Or there's some other call I can make using the notificationId or trackingId to meet the desired. Thanks!
You can get this data from per message telemetry. Please see below blog for more information.
https://azure.microsoft.com/en-us/blog/retrieve-platform-notification-system-error-details-with-azure-notification-hubs/
I'm trying to find some ways to send a post notification to specific android device using its UUID , so I will do the following :
1 : login screen on android and then get UUID number from the device
2 : send this UUID to online database linked to userID
3 : I want to know how to send post notification to a specific UUID which I get from my database ?
Sending notification to android device using java is very easy.
If you want to push the notification directly from REST client, then you can refer this
If you want to send notifications from your java program, then follow these simple steps,
Add gcm-server.jar library file in your application
Create a Sender, that will send the notification
com.google.android.gcm.server.Sender sender = new Sender("pass your gcm api key here");
Then create a message object that will contain the data that you want to send
com.google.android.gcm.server.Message message = new Message.Builder().addData("key","value").build();
addData("key","value") in above code will add the key value in json to be send.
Then you can choose any of send method provided in Sender class
com.google.android.gcm.server.Result result = sender.send(message, device_token, no of retries);
There are total four version of send method available. You can find more detail about Sender class here
I tried to send emails with Amazon SES, with the Java AWS SDK, and it worked. I would like to be able to check (at a later time) whether the delivery was successful. I will define it successful if the final mailserver accepted the mail for delivery.
I saw that when you send an email you can get a messageId that uniquely identifies your email:
SendEmailRequest request = new SendEmailRequest(from, destination, message);
SendEmailResult result = service.sendEmail(request);
String messageId = result.getMessageId();
However I saw that you can get only aggregated statistics, for example with SendDataPoint (Represents sending statistics data. Each SendDataPoint contains statistics for a 15-minute period of sending activity).
I'm not using SES to send bulk emails, but personalized notifications on a very low volume and I'd be interested to check every single message.
Did I overlook something? Is it possible to do this type of check with SES?
Amazon does provide a mechanism for you to capture bounces, which provides you with contrapositive verification.
You can create a mailbox to receive bounce notifications, then tell SES to forward bounce notifications there. e.g.:
request.setReturnPath("bounces#example.com");
You can then write code to periodically check that mailbox, and parse the messages for the destination email address.
Amazon provides a brief explanation of how they handle bounces & complaints here:
http://aws.amazon.com/ses/faqs/#37
However, if you want to check if the message avoided the spam filter or was read by the end user, that is beyond the scope of SES (although they work hard to ensure deliverability).
We use Bouncely.com. You simply set the ReturnPath to bounces#bouncely.com and it tracks all the bounces and spam reports. It also has an API that allows us to unsubscribe users automatically.
Use Amazon Simple Notification Service and define an HTTP endpoint to receive notification in case of email bounces. Works perfectly.