Domain modeling with Lagom
I’m currently trying to build an application that handles personal finances. I’m struggling with Lagom ways of doing because I can’t find any example of “real” application built with Lagom. I have to...
View ArticleSilent Google FCM notification using Alpakka
Hi, I need to send silent push FCM notification. How can I acheive that using Alpakka? According to FCM Doc I should add "content_available": true to the request. However some other sources mention...
View ArticleContext.ask semantics
1.) Is the code in the last parameter of context.ask (the part where you match against Success and Failure) executed as part of the main message processing thread, or is it part of some future...
View ArticleAkka HTTP 10.1.12 released
Dear hakkers, We are happy to announce the 10.1.12 release of Akka HTTP. This release is the 12th update in the 10.1.x series of Akka HTTP. Changes since 10.1.11 For a full overview you can also see...
View ArticleCassandra Persistence dependencies causes NoClassDefFoundError:...
This is not a Akka issue per se, but help will be appreciated. My project uses Akka with Cassandra Persistence actors and also use Janusgraph with Cassandra as the data store and Elastic as the index...
View ArticleAkka gRPC with Akka HTTP Routes
Greetings, I need to put gRPC on the same port as Akka HTTP. The path I have taken so far is to instantiate the generated gRPC handler via partial(), then use it in a route as follows: val echoService...
View ArticleRestartFlow eventually fails the stream?
The following statement in scaladoc seems unclear to me. It does not give clear answer whether the stream will fail or not once the number of restarts reaches the maxRestarts value: github.com...
View ArticleHow to build a durable mailbox with Akka Persistence?
I have a scenario where we have an EventProcessor actor which has a rate limit on how many events it can process per second. So, when we tell to the EventProcessor actor, messages get queued up in...
View ArticleAlpakka Kafka 2.0.3
Dear hakkers, We’re glad to let you know that Alpakka Kafka 2.0.3 is available now. Akka Cluster Sharding integration Its flagship feature is the Akka Cluster Sharding integration to co-locate Kafka...
View ArticleSick Cluster - WeaklyUp Leader
A number of occasions now we have encountered the situation where the cluster Leader has moved on to a WeaklyUp node. This is I guess reasonable if all other Up nodes are not accessible due to...
View ArticleActor Mailbox after crashing/restarting
If an actor is in the middle of processing a message and it throws an exception, but it is supervised with the restart strategy do all the queued messages in the mailbox get carried over? Does the...
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Actors Streams with actorRefWithBackpressure
Hi, I have an application that needs to interact with 3rd party APIs that have some rate-limiting requirements. I’ve designed two shard regions: one for business actors and other for worker actors,...
View ArticleInteracting with root actor through user console input
Is there a nice idiomatic way to send messages to the root actor through user input at the console. Ideally I don’t want a thread dedicated to just sitting at the console waiting for input. Thanks! 2...
View ArticleAkka Projections 0.1 released
Dear hakkers, Akka Projections is intended for building systems with the CQRS pattern, and facilitate in event based service to service communication. In Akka Projections you process a stream of...
View ArticleIs it possible to use ProducerMessage.passThrough with Transaction flow in...
Hi, I want to abort message or passthrough message with Transactional Flow, I was using passthrough for some messages if business logic does not want to produce that message to target topic because it...
View ArticleAre controllers part of an actor system?
Hi, I’m new to play framework, my question is: The code that runs on a controller, is called by an actor system or better by an actor? Thank you 1 post - 1 participant Read full topic
View ArticleRestartSource.onFailuresWithBackoff does not work with...
Hi, i would like to restart on failures a call that does an s3 listing (akka-stream v2.5.31 and alpkakka v2.0.0): RestartSource .onFailuresWithBackoff( minBackoff = 3 seconds, maxBackoff = 3 seconds,...
View ArticleHow can I make sure that `FileIO.fromPath` is picking up my dispatcher?
I’m trying to change the underlying dispatcher of FileIO. The docs say that it is using akka.stream. blocking-io-dispatcher. So I configured it like this: akka.stream { blocking-io-dispatcher =...
View ArticleAlpakka - SQS Source stop pull
Hey all, I have a question about SqsSource, How its possible to read all messages from queue every week, I’m starting a stream with every deadletter queue in amazon account once the service is...
View ArticleAlpakka elasticsearch update script
can someone help me how can I pass the update script through ElasticsearchFlow ? 1 post - 1 participant Read full topic
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