The message-queue tag has no usage guidance.
0
votes
0answers
42 views
Service with task queue architecture
I have a REST endpoint that accepts a request from a client. This request needs to be done in steps and involves:
1) request to external service to perform a job
2) after this job is completed ...
0
votes
2answers
42 views
How can an update message from a rabbitmq broker reach all relevant clients via multiple websocket servers?
Lets say I have multiple websocket servers that maintain many connections to clients to send updates. These websocket servers will be pulling said updates from a rabbitmq broker, and broadcasting them ...
1
vote
1answer
49 views
What pattern should I set for handling event as working item?
I have this business event : "CustomerUpdated" published by my system.
I have many application listening to these events, and they do all king of action : sending email, updating the database, ...
4
votes
3answers
106 views
Slow throughput - still worth using a dedicated message queue?
Here are some requirements for a queue:
Every few days add ~100k tasks with various priorities
Workers will pull tasks at typically less than 10 / second
Tasks need to be completed by ~2 unique ...
0
votes
0answers
16 views
Integrating ActiveMQ in jetty
I was wondering how to integrate an ActiveMQ message broker into jetty, so that jetty starts up the broker (or ensures that it is running) before running the services.
Right now we have solved this ...
2
votes
0answers
44 views
Handling cases where the message queue is unreachable
We are using Apache Camel with ActiveMQ in a microservice architecture in a growing system of integration solutions. I was wondering how each service should react when they are unable to connect to ...
0
votes
0answers
35 views
Set up E-Mail message queue with digest system
We're currently building out a system to send out e-mail notifications in a digest format. We'll be delegating the actual sending to Sendgrid, but first we need to construct these messages using the ...
6
votes
1answer
109 views
Best practice for ensuring name uniqueness/correctness in message queues in a microservice architecture/distributed system
I was wondering what a good solution would be for ensuring that queue-names are entered correctly and are only used by the correct applications in a large system which uses message queues to exchange ...
0
votes
1answer
30 views
A WebSocket API, reply message
I am writing a Web application for copying files between servers.
I decided to write a WebSocket server which will receive and send relevant messages (that is communicate with a browser), start and ...
2
votes
2answers
70 views
AMQP broker and happen-before guarantees
I am trying to figure out how an AMQP broker, such as RabbitMQ, can be integrated in our architecture. This should allow to easily scale horizontally in the future.
For the sake of simplicity, let me ...
3
votes
1answer
87 views
Web API to Windows Service communication via ZeroMQ
I have an ASP.NET Web API 2 web service. This is the interface customers will use to submit data.
I have a Windows Service running on an internal server. I will be sending the customer's POST data to ...
4
votes
2answers
127 views
How to handle thousands of messages to C socket?
I currently have a setup looking like this:
__________________ _________ ________ ___________
| Front end server |----| Varnish |----| NodeJS |----| C-service |
‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾ ...
0
votes
1answer
81 views
Cache invalidation on multiple servers
I have 6 web servers which are giving me problems due to cache inconsistency. I am thinking of building a cache invalidation service such that there is a topic on which all the servers can publish a ...
1
vote
1answer
27 views
Message persistence in Message Queues
I have looked into several message queues as referenced in this link. Several of the larger and more popular ones are in memory only.
I can understand the need for this in some situations however in ...
5
votes
2answers
113 views
Master-Slave Cluster - How to make sure the master is really dead for the slave to take over?
I have a in-house messaging system, similar to a message broker. We have one master message broker and one slave message broker. A message broker just receives messages and sends them to all nodes. ...
0
votes
1answer
34 views
Message queues: Cluster of “send mail” and analytics consumers, ensure dispatch to only one mail-consumer and only one analytics-consumer
It seems there's lots of ways to create a task queue where something like a round-robin algo rotate tasks between consumers, but say I have a user queue, and I want to both send a welcome mail and do ...
3
votes
1answer
83 views
Simple messaging pattern to replace shared DB? [closed]
There are two modules A and B using the same DB. A imports B as a JAR. I read that messaging patterns can replace the tightly coupled solution of using a shared DB but I am not sure which message ...
1
vote
1answer
78 views
Eventing solutions for java legacy applications too old for real JMS queue/topic eventing?
What are some architectural solutions that can mimic eventing for systems (Java) that are too old to implement eventing solutions, such as conventional Queue/Topic based JMS messaging?
I have a ...
19
votes
4answers
786 views
Using flat files vs database/API as a transport between a frontend and backend
I've got an application which has generated a rather heated discussion between a couple of the developers.
Basically, it's split into a web layer and a backend layer. The web layer collects ...
1
vote
0answers
79 views
Guaranteed message sending for messages of different priority for different modules
We have created a message que system using priority messages. The idea behind this is as follows:
We have a list of clients.
All clients know if (and what kind of priority) messages they have ...
2
votes
1answer
211 views
What is an appropriate pattern for handling a queue of network events in C++?
I'm writing an application that sends and receives messages over the network and pushes them into a std::deque queue. and I'm looking for the appropriate programming pattern to handle all of the ...
0
votes
0answers
57 views
Fault-tolerant, distributed, event dispatcher architecture?
I'm building an event handler/dispatcher for my monolith, aiming to slowly replace big parts of it by delegating jobs to other systems via events. For example, sending emails when a customer buys ...
1
vote
0answers
37 views
MVC WebApplication as MQ Subscriber
We have a Web (.Net MVC5) application that we are looking to start offloading some of the heavy processing off the Web Application to a distributed services layer. As part of this process we are ...
4
votes
2answers
390 views
Understanding the Single-Writer Principle
The article on the Single-Writer Principle of the Mechanical Sympathy blog explains how bad queues are (performance-wise), because they need to be able to receive messages from multiple produers, and ...
1
vote
2answers
78 views
How to guarantee web script execution sequence/order or not parallels queues
This is a very simplified version of the problem:
You have an integer saved on a server called "B" and you have an script saved on a server call "A" exposed to the internet. The script pulls the ...
4
votes
1answer
259 views
Is it always the best way to go to queue emails instead of sending them real-time? [duplicate]
If you had to decide between queueing emails and sending them real-time, is it always the best way to go putting them in a queue and sending them one by one instead of instantly as soon as a user ...
2
votes
1answer
69 views
Using short-lived REST requests to obtain messages from a message queue for clients
I would like to put together a system where clients obtain messages from a REST API, but with the producer being able to use the semantics of a message queue: e.g. ordering of messages, a destination ...
2
votes
3answers
235 views
Design pattern for large amounts of overflowing data?
Our current queues publish messages that consumed by 3rd party services with rate limits. Currently the messages are retried with exponential back-off. However there could be cases where data is ...
2
votes
2answers
772 views
Distributed transactions with Kafka
I need to implement a transaction that spans over loosely coupled (SOA+MOM) components.
When a particular event is received, FOO and BAR need to do a transactional operation: that is, both the ...
4
votes
1answer
196 views
Azure ServiceBus Queue: Consumer Application
I am running a .net MVC4 web application. I want to be able to hit an action on a controller, create an email and send it to my service bus queue to be processed (sent).
What are my options as far ...
4
votes
1answer
239 views
Message queue vs database for delayed tasks
I need to build a system that can handle a fairly high amount of delayed tasks (e.g. scheduled emails). For non-delayed tasks I would go for something like RabbitMQ.
But, is it ok to let tasks ...
2
votes
1answer
153 views
How do I handle long running third party calls from backing up my message queue?
Here is my exact scenario.
I must make requests to a third party service
The service takes ~15 seconds to respond
It also has no webhooks or any call back mechanisms
These requests are not made ...
7
votes
1answer
3k views
Does Akka obsolesce JMS/AMQP message brokers? [closed]
I spent the last week deep diving into the Akka docs and finally understand what actor systems are, and the problems that they solve.
My understanding (and experience with) traditional JMS/AMQP ...
1
vote
1answer
191 views
How many Topics (queues) to practically use in an ESB
In all the Service Bus examples and tutorials I've seen, they cover publishing a single message to a single Topic that is picked up by a single listening Subscriber. Whilst this is good for a simple ...
2
votes
0answers
487 views
Architecture design for Java servlet that triggers work (for sending push notifications)
I'm designing a push notification server (for pushing notification via APNS and Google servers) and have come up with the following design for a Java based web application server. I would really like ...
3
votes
2answers
592 views
Is it worth it to use a message-queue framework in this case?
We have these things called "executions" that are run at certain times. They have a delay property that basically says "execute me after delay microseconds`. Currently we are using Cassandra as a ...
1
vote
0answers
65 views
Job queue dispatching based on resource constraints
We have a job-queue shaped hole in our architecture, but it isn't immediately obvious that there's a piece of existing software to fill it. There may be a reason for this, or there might not, so let ...
4
votes
3answers
668 views
Web Service and Message Queue
We're looking at creating a web services/REST API layer that will be consumed by web and mobile clients.
To make the solution more robust I was considering putting the commands from PUT, POST, and ...
1
vote
1answer
56 views
Sequencing distributed tasks with a distributed DB
Background
I have two separate processes, WriteIt() and ReadIt(). One creates records, and the other processes the records in a DB cluster.
Once WriteIt() creates a record, it queues a ReadIt() ...
0
votes
2answers
211 views
Storm topology to handle “dating website”-like workloads
suppose im writing a dating website, similar to okcupid. there are profiles, and i need to compute the (N^2) "match" table - given every 2 profiles whats the match between them?
I was thinking this ...
1
vote
1answer
161 views
Options for repeated distributed task
Scenario
My project has a need to periodically scan the database and notify administrators for particular issues. For example:
Any errors in the logs since last update?
Do values match expected ...
1
vote
3answers
293 views
Using message queue systems - forcing synchronous processing
I have a php process producer-a which places a job on RabbitMQ a - deferring processing to a third-party service. The 3rd party service completes processing a and places a response onto queue b. I ...
2
votes
1answer
944 views
Is having a bi directional message queue a design smell?
I have an architecture with 1 backend server and multiple frontend servers.
The frontend servers are connected in a bi-directional (web sockets) connection to clients so they can send messages to ...
1
vote
1answer
181 views
Persist data downloaded by Celery workers
I'm working in a tool that downloads tweets from Twitter to process them later. For this purpose I'm using Celery with RabbitMQ, sending task with the keywords that must be tracked by the workers.
My ...
1
vote
0answers
78 views
Improve communication between controller and trackers in a Twitter fetcher tool using RabbitMQ or Apache Flume
I've been working for a time with some researches developing a tool to fetch tweets from Twitter and process them in some way. The first prototype "worked" but became a pain as we used sockets to ...
2
votes
3answers
597 views
Design a Queuing Solution with Clustering and Multiple Consumers
It is a Design Problem which I am listing out here.
I have different set of business operations that are carried out for different business entities.
Operations:
Operation A
Operation B
Operation ...
1
vote
1answer
93 views
More than 20 Records Inserted in a Span of 1 Sec
Well, this is not specific to any programming languages. I came across this situation in Android, iOS, PHP and .NET.
The problem is many times I come across a situation while building IoT apps, where ...
0
votes
0answers
180 views
When to use a message queue as a web service database?
Does it make sense to implement a message queue system such as RabbitMQ or Kafka for the purpose of storing data in a queue? For example, this could be done in order to handle things such as ...
0
votes
1answer
111 views
Should I have a queue with SMS requests to picked up by a separate process or connect directly to the API?
I created an email queue where I put the requests for emails to be sent. If the SMTP server is unavailable, the requests are not lost.
When the SMTP server gets back online, the background service ...
3
votes
3answers
4k views
UML: Queue processor in a sequence diagram
Which is the appropriate way of representing a queue processor in a UML sequence diagram?
I want to represent in the same diagram two systems that are loosely coupled through a queue. The first ...
