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IP search based on IPIP.net.
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- Look up an IPv4 IP address .
- Finds a IP .
- Read the offset from the header .
- Read a buffer from the buffer .
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QUESTION
I'm having a concurrency issue with MassTransit sagas.
I'm currently working on a POC with this flow:
- One thread produces 100 event that are published to MassTransit in a sequence.
- When the saga is instantiated it publishes another event to MassTransit.
- The new event is picked up by a Consumer that perform some business logic and publishes one of two resulting event to MassTransit.
- The resulting events from step 3. triggers a state change in the saga
I sometimes get exceptions like this Microsoft.EntityFrameworkCore.DbUpdateConcurrencyException: The database operation was expected to affect 1 row(s), but actually affected 0 row(s); data may have been modified or deleted since entities were loaded.
in step 4, and the state change is not persisted.
Here is the business logic code:
...ANSWER
Answered 2022-Mar-07 at 13:04The proper configuration in your SagaDefinition
is shown below. Note the use of UseMessageRetry
, instead of UseRetry
.
QUESTION
I am using MassTransit 7.2.2 in a .NET Core application with RabbitMQ(for local development) and SQS(for deployment) where a single message processing can result in multiple new messages getting created and processed.
All the messages share the same base type
...ANSWER
Answered 2022-Feb-06 at 15:48As explained in the documentation, consumers (and their dependencies) must use one of the following when sending/publishing messages:
ConsumeContext
, typically within the consumer itselfIPublishEndpoint
orISendEndpointProvider
, typically used by scoped dependencies of the consumerIBus
, last resort, as all contextual data is lost from the inbound message
As for your final question, "Is there a way to share the Context data between Consumers while using IBusControl for sending / publishing messages?" the answer is no. The consume context would be needed to access any of the contextual data.
QUESTION
I want to create a Pipe
interface in TypeScript, the only constraint is that when the pipe-through is done, I want it to return the same type as what came in:
ANSWER
Answered 2022-Jan-20 at 09:43I think the conceptual problem here is that after the pour
call the pipe becomes a pipe of Juice. You could model this by making pour
generic and returning a IPipe
of a specific liquid that is returned.
QUESTION
MassTransit Version: 7.2.2 | Serilog version :2.10.0 | Serilog.Asp.net core version 4.1.0 |
Asp.net core 5.0.
I set the follow config in my application, prior to configuring the bus.
LogContext.ConfigureCurrentLogContext(loggerFactory);
although, according by this document I don't need to set this config.
If you are using the new .AddMassTransit() configuration, combined with .AddBus(), then ILoggerFactory is automatically configured for you. In this case, the statement above is not required.
now, my Serilog configs:
"outputTemplate": "{Timestamp:yyyy-MM-dd HH:mm:ss.fff} - {ApplicationName} - {SourceContext} - {Level:u3} - {CorrelationId} - {UserId} - {ClientVersion} => {Message:lj}{NewLine}{Exception}",
with this template in my Http services, I see the logs, for example:
2021-12-29 12:35:36.096 - xxxx- Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker - INF - fcf97692-7af4-492c-9d1b-cf7456d1d371(corrId)- 11111(userId)- 1.2.1(ClientVer) , etc
but when logging in the consumers, didn't log my Serilog properties(CorrelationId, UserId, ClientVersion, etc).
2021-12-29 12:35:36.096 - xxxx- Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker - INF - - - , etc
Did I need other configs for resolve this issues?
I want also push my Serilog properties when throws exception into consumers. at this time it isn't log. as you can see:
2022-01-01 13:07:24.736 - xxx - MassTransit.ReceiveTransport - ERR - - - => R-FAULT "rabbitmq://localhost/xxx" "c8100000-568d-0050-fe74-08d9cd0a4d36" xxxx
the sample:
I pushed my properties in the MassTransit publish filter:
ANSWER
Answered 2022-Jan-03 at 14:32finally, I solved this problem. I added two filter: PublishContext filter and ConsumeContext filter.
in the PublishContext filter, I set Serilog Properties into MT headers:
QUESTION
I run Kafka inside Kubernetes cluster on VMWare with a ControlPlane and one worker node. From the ControlPlane node my client can communicate with Kafka, but from my worker node this ends up in this error
...ANSWER
Answered 2021-Dec-06 at 09:41Calico Pod (from the worker node) was complaining that bird: Netlink: Network is down, even it was not crashing
QUESTION
I'm trying to create some FluentValidation middleware for my MassTransit pipeline. I thought it would be a suitably easy project for my first ever MassTransit middleware, but I'm afraid I've got in over my head. Can somebody rescue me please?
Other than the MassTransit middleware documentation I have been referring to this video for guidance:
Here's my filter:
...ANSWER
Answered 2021-Nov-28 at 19:45If you need access to the container from middleware, I'd suggest using a scoped filter. There is a sample that shows how they are built.
QUESTION
I want to be able to send message from a unit test to an ASP.Net Core application using the in-memory implementation of MassTransit. The in-memory implementation is important as the actual application uses ActiveMQ but we want to replace that during testing with the in-memory implementation.
I started creating a new ASP.Net Core API project from VS2019 using .NET 5 and added MassTransit to Startup
as follows:
ANSWER
Answered 2021-Nov-25 at 13:52You are awaiting the publish, but at that point, the test exits and starts tearing down the application. You would need to wait until the consumer has completed, since it's called asynchronously. When using the in-memory test harness, there are monitors that can be used to wait until there is no bus activity, but I have no idea how you'd do that in your scenario above.
How are you expecting to assert that the consumer actually completed the work?
To prove this, add a simple await Task.Delay(1000)
and see if the consumer executes.
QUESTION
I have created a Masstransit publish filter, that creates a message header, based on information provided by an accessor.
I want to set some values in the accessor, during processing, which will be picked up by the publish filter.
The way I understand filters, is that they are scoped, and therefore, any message published, will create a new DI scope. This means that the values I set before publishing the message, will not be available in the filter.
...ANSWER
Answered 2021-Oct-27 at 15:16To use an existing scope, use IPublishEndpoint
instead of IBus
to publish the message. You should resolve IPublishEndpoint
from the container scope service provider, and the scoped filter should use the same scope.
QUESTION
I'm trying to set MassTransit up with Azure Service Bus. I want to use the DLQ instead of relying on _skipped
and _error
queues, but I'm not sure if I'm doing it wrong.
This is a simplified version of my setup:
...ANSWER
Answered 2021-Oct-26 at 14:13With a subscription endpoint, the DLQ is the default behavior.
What you've configured is likely conflicting with the default configuration. If you get rid of the following lines, it should work as expected:
QUESTION
ANSWER
Answered 2021-Oct-15 at 10:23See Use host networking, it clealy mentioned the --net=host
not works on macos:
The host networking driver only works on Linux hosts, and is not supported on Docker Desktop for Mac, Docker Desktop for Windows, or Docker EE for Windows Server.
So, the network in container surely not same as the one in your macos.
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