I need to initialise my Corda nodes by running a few flows to create certain states.
At the moment I am doing it via the CRaSH shell.
e.g.
flow start IOUFlow iouValue: 50, counterparty: Bank1
Is it possible to have the node run a script or some commands on node startup to do this automatically?
If not, how can I write a bash script to automate these CRaSH commands?
Corda 4.4 introduces a new feature to register actions to be performed on node startup.
You could register an action to be performed on node startup using a CordaService.
appServiceHub.register(
AppServiceHub.SERVICE_PRIORITY_NORMAL,
event -> {
// Your custom code to be run on startup.
}
);
You might want to check on the event type to keep it future proof, but currently the ServiceLifecycleEvent just has a single STATE_MACHINE_STARTED enum.
Related
Symfony 2.8
Using https://github.com/j-guyon/CommandSchedulerBundle to manage periodic Command executions.
Each of these Command executions invokes an specific Service based on the Command arguments.
Being in the Services (all of them implementing the same Interface and extending an Abstract class), the plan is to create and execute sub-processes (asynchronously if possible)
Based in your experience, which will be the best way to deal with that sub-processes?
Create a Process object (based on a Controller Action) for each sub-process, and run them synchronously (https://symfony.com/doc/2.8/components/process.html)
Use kind of Queue Bundle to deal with all of them (Process or Messages or whatever), such https://php-enqueue.github.io/symfony or https://github.com/armetiz/LeezyPheanstalkBundle (any other suggestion?)
Cheers!
When using Google Cloud Tasks, how can i prematurely run a tasks that is in the queue. I have a need to run the task before it's scheduled to run. For example the user chooses to navigate away from the page and they are prompted. If they accept the prompt to move away from that page, i need to clear the queued task item programmatically.
I will be running this with a firebase-function on the backend.
Looking at the API for Cloud Tasks found here it seems we have primitives to:
list - get a list of tasks that are queued to run
delete - delete a task this is queued to run
run - forces a task to run now
Based on these primitives, we seem to have all the "bits" necessary to achieve your ask.
For example:
To run a task now that is scheduled to run in the future.
List all the tasks
Find the task that you want to run now
Delete the task
Run a task (now) using the details of the retrieved task
We appear to have a REST API as well as language bound libraries for the popular languages.
Would you know how to run a background task on Symfony 4, based on the setup of a form ? This would avoid that the user has to remain on the form until the task is finished.
The idea would be that when the form is validated, it starts an independant background task. Then the user can continue its navigation and come back once the task is finished to get the results.
Thanks for your help,
You need to use pattern Message Bus. Symfony has own implementation of this pattern since version 4.1 introducing Messenger Component.
You can see documentation here: https://symfony.com/doc/current/components/messenger.html
To get it work you need some external program that will implement AMQP protocol. Most popular in PHP world IMHO RabbitMQ.
A very simple solution for this could be the following procedure:
Form is valid.
A temporary file is created.
Cronjob gets executed every five minutes and starts a symfony command.
The command checks if the file exists and if it's empty.
If so, the command works of the background task. But before this, the command write it's process id in the file to prevent from beeing excuted a second time.
Remove the file when the command has finished.
As long as the file exists you can show a hint for the user that the task is running.
Is there anyway that a Jenkins job can be paused until a notification is received. Ideally with a payload as well?
I have a "test" job which does a whole bunch of remote tests and I'd like it to wait until the test are done where I send a HTTP notification via curl with a payload including a test success code.
Is this possible with any default Jenkins plugins?
If Jenkins 2.x is an option for you, I'd consider taking a look at writing a pipeline job.
See https://jenkins.io/doc/book/pipeline/
Perhaps you could create a pipeline with multiple stages, where:
The first batch of work (your test job) is launched by the first pipeline stage.
That stage is configured (via Groovy code) to wait until your tests are complete before continuing. This is of course easy if the command to run your tests blocks, but if your tests launch and then detach without providing an easy way to determine when they exit, you can probably add extra Groovy code to your stage to make it poll the machine where the tests are running, to discover whether the work is complete.
Subsequent stages can be run once the first stage exits.
As for passing a payload from one stage to another, that's possible too - for exit codes and strings, you can use Groovy variables, and for files, I believe you can have a stage archive a file as an artifact; subsequent stages can then access the artifact.
Or, as Hani mentioned in a comment, you could create two Jenkins jobs, and have your tests (launched by the first job) use the Jenkins API to launch the second job when they complete successfully.
As you suggested, curl can be used to trigger jobs via the API, or you can use a Jenkins API wrapper package for to your preferred language (I've had success using the Python jenkinsapi package for this sort of work: http://pythonhosted.org/jenkinsapi/)
If you need to pass parameters from your API client code to the second Jenkins job, that's possible by adding parameters to the second job using the the Parameterized Build features built into Jenkins: https://wiki.jenkins-ci.org/display/JENKINS/Parameterized+Build
I am performing a database restore as part of our TFS 2010 Team build. Since a number of databases are being restored, I am using a batch file which is invoked via the InvokeProcess activity.
I have a number of issues that I am uncertain about:
1. Does the TFS wait for all the command in the batch file to complete or move to the next activity as soon as kicking the InvokeProcess?
2. Is there a way to have the build process wait for successful completion of the batch command?
I am using it as follows:
The FileName property of InvokeProcess has "c:\windows\system32\cmd.exe"
The Arguments property has the full path of my batch file.
Yes the InvokeProcess will wait for the external command to finish.