Single-Instance | Socket based utility librarie for Java | Runtime Evironment library
kandi X-RAY | Single-Instance Summary
kandi X-RAY | Single-Instance Summary
Project: Single Instance Developer: Borja Lopez Urkidi Organization: NEGU Soft Web: This is a utility to control the creation of instances across the local system. This means we can check if there is already an instance of certain program running at the moment. It is also possible to implement actions to be performed when attempting to create a new instance if there was already one active. A socket based mechanism is used to establish the instances. You can select the port number on which you want to work and a listening socket will take it. Like this, the new instance will fail to listen on that port number, meaning that there is another one running. Since it is a socket based system, it allows passing data between the actual instance and the one attempting to establish. This can be useful, for example, to pass a file url to a program that will be opened in the currently running instance, if there is one.
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Top functions reviewed by kandi - BETA
- Main method entry point
- Establishes the instance
- Requests a single instance
- This method should be called when the instance is closed
- Main method
Single-Instance Key Features
Single-Instance Examples and Code Snippets
Lines of Code : 40License : Non-SPDX (Apache License 2.0)
Copydef _validate_representative_dataset(
representative_dataset: repr_dataset.RepresentativeDatasetOrMapping,
signature_keys: Collection[str]) -> None:
"""Validates the representative dataset, based on the signature keys.
Representative def get_singleton_broadcaster(cls, target_size):
"""Broadcast from 1 element to target_size elements."""
return _LayerBroadcaster.from_gather_index(
array_ops.zeros(target_size, dtype=target_size.dtype)) public static Audio getInstance() {
return INSTANCE;
} Community Discussions
Trending Discussions on Single-Instance
QUESTION
I've created an offcanvas component for angular, but I can't get my unit tests to work.
Here's the failing unit test (offcanvas-host.component):
...ANSWER
Answered 2022-Mar-11 at 16:39I think you have to mock overlayService create method which will have to have a mock attach that has instance and backdropClick.
Something like this (follow lines with !!):
QUESTION
I've setup autoscaling for a MIG based on pub-sub queue size:
...ANSWER
Answered 2022-Feb-13 at 14:43If we look at the following article link, we see that scaling in (by default) doesn't occur until the signal that caused the scale out has ceased 10 minutes ago. I read this as:
If at 9:00am your signal (pub/sub) was breached then assuming the condition is no longer present immediately, scale in won't happen until at least 9:10am.
I seem to see that the scaling in looks for the signal in the last 10 minute window. Given also that you are looking a GCP monitoring metrics and these don't get updated in real time but instead have latencies, even though the trigger may no longer be present immediately, it may be 9:05am before monitoring reports all is now well. This means it might be 9:15am (9:05am + 10 minutes) before scale in occurs.
Looking at the docs again, we seem to see that we can change the scale-in policy using the --scale-in-control flag of gcloud. See scale-in-control flag documentation. Looking closely, it has a parameter called time-window that is documented as:
How long back autoscaling should look when computing recommendations. The autoscaler will not resize below the maximum allowed deduction subtracted from the peak size observed in this period. Measured in seconds.
This seems to allow us to over-ride the default 10 minutes period.
QUESTION
I have a Vert.x server running on a single-instance Elastic Beanstalk server, and I'm trying to configure it to operate over HTTPS. I've set up the NS records and A record in AWS Route 53 to map the subdomain to my instance (pinging the subdomain succeeds), requested (and verified) the certificate from ACM, and opened up port 443 in my EC2 security group. But I can't quite figure out how to "attach" the certificate to my domain (if that's somehow necessary) or to get port 443 properly mapped to my Vert.x server.
Any tips will be appreciated.
...ANSWER
Answered 2022-Feb-01 at 11:22to get port 443 properly mapped to my Vert.x server.
If you use ACM for the SSL certificate, you have to setup application load balancer. The process is detailed in:
To enable load balancer for your EB environment, you have to change EB environment type to Load-balanced if you already don't have that.
With the load balancer, you don't have to modify your application at all, as HTTPS will be fully handled by the load balancer.
QUESTION
I was following the Run a Single-Instance Stateful Application tutorial of Kubernetes (I changed the MySQL docker image's tag to 8), and it seems the server is running correctly:
But when I try to connect the server as the tutorial suggesting:
...ANSWER
Answered 2021-Oct-16 at 15:30Default behavior of root account can only be connected to from inside the container. Here's an updated version of the example that allows you to connect from remote:
QUESTION
TL;DR
Spring Cloud Data Flow does not allow multiple executions of the same Task even though the documentation says that this is the default behavior. How can we allow SCDF to run multiple instances of the same task at the same time using the Java DSL to launch tasks? To make things more interesting, launching of the same task multiple times works fine when directly hitting the rest enpoints using curl for example.
Background :
I have a Spring Cloud Data Flow Task that I have pre-registered in the Spring Cloud Data Flow UI Dashboard
...ANSWER
Answered 2021-May-12 at 16:57In this case it looks like you are trying to recreate the task definition. You should only need to create the task definition once. From this definition you can launch multiple times. For example:
QUESTION
I had cloned these file as per facebook instructions
And then Step 1: Create a biz Directory for the Setup Scripts
...ANSWER
Answered 2021-Apr-16 at 02:10The WhatsApp Web Business Tool is deprecated since v2.29.1 You can only interact with your instance via REST API. You can leverage our Postman collection for this https://github.com/fbsamples/WhatsApp-Business-API-Postman-Collection
Sounds like you are ready to proceed with Step 6
QUESTION
ANSWER
Answered 2021-Apr-04 at 02:45Nodejs v14 has V8 8.4 But, replaceAll was added to V8 8.5. Nodejs v15 has V8 8.6 and thus that's the first nodejs version where you can use .replaceAll(). You can see this all described in the nodejs v15 release notes or in this specific change report.
QUESTION
Recently I started having some problems with Django (3.1) tests, which I finally tracked down to some kind of memory leak.
I normally run my suite (roughly 4000 tests at the moment) with --parallel=4 which results in a high memory watermark of roughly 3GB (starting from 500MB or so).
For auditing purposes, though, I occasionally run it with --parallel=1 - when I do this, the memory usage keeps increasing, ending up over the VM's allocated 6GB.
I spent some time looking at the data and it became clear that the culprit is, somehow, Webtest - more specifically, its response.html and response.forms: each call during the test case might allocate a few MBs (two or three, generally) which don't get released at the end of the test method and, more importantly, not even at the end of the TestCase.
I've tried everything I could think of - gc.collect() with gc.DEBUG_LEAK shows me a whole lot of collectable items, but it frees no memory at all; using delattr() on various TestCase and TestResponse attributes and so on resulted in no change at all, etc.
I'm quite literally at my wits' end, so any pointer to solve this (beside editing the thousand or so tests which use WebTest responses, which is really not feasible) would be very much appreciated.
(please note that I also tried using guppy and tracemalloc and memory_profiler but neither gave me any kind of actionable information.)
I found that one of our EC2 testing instances isn't affected by the problem, so I spent some more time trying to figure this out.
Initially, I tried to find the "sensible" potential causes - for instance, the cached template loader, which was enabled on my local VM and disabled on the EC2 instance - without success.
Then I went all in: I replicated the EC2 virtualenv (with pip freeze) and the settings (copying the dotenv), and checked out the same commit where the tests were running normally on the EC2.
Et voilà! THE MEMORY LEAK IS STILL THERE!
Now, I'm officially giving up and will use --parallel=2 for future tests until some absolute guru can point me in the right directions.
And now the memory leak is there even with --parallel=2. I guess that's somehow better, since it looks increasingly like it's a system problem rather than an application problem. Doesn't solve it but at least I know it's not my fault.
Thanks to Tim Boddy's reply to this question I tried using chap to figure out what's making memory grow. Unfortunately I can't "read" the results properly but it looks like some non-python library is actually causing the problem.
So, this is what I've seen analyzing the core after a few minutes running the tests that I know cause the leak:
ANSWER
Answered 2021-Mar-23 at 13:01First of all, a huge apology: I was mistaken in thinking WebTest was the cause of this, and the reason was indeed in my own code, rather than libraries or anything else.
The real cause was a mixin class where I, unthinkingly, added a dict as class attribute, like
QUESTION
My VM crashed because it was out of memory. After rebooting the machine docker was not running:
...ANSWER
Answered 2020-Dec-19 at 13:00If the docker.service contains only one line as it mentioned it's bogus.
As it says
QUESTION
I need to add some locations to nginx.conf so the environment URL points to app.php. I have modified the file using vi. Restarting NGINX it works. But I need this configuration to be load automatically when I use eb deploy.
I have read and tried: https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/customize-containers-ec2.html
How to configure .ebextensions for nginx location directive?
Amazon Elastic Beanstalk ebextension
I have /.ebextensions/01_nginx.config
...ANSWER
Answered 2020-Nov-12 at 18:49After spending a whole day trying to modify nginx.conf on deployment, creating a custom nginx.conf directly in /etc/nginx/ via a .config file in .ebextensions didn't work for me as it would be systematically overwritten by the default one.
Same thing happened when I created the custom file in /tmp and wrote a container_command that would replace /etc/nginx/nginx.conf.
You actually need to create a script that will be executed after deployment, after elastic beanstalk has written all your files.
If you are using an Amazon Linux 1 environment:Source: https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/custom-platform-hooks.html
To execute any script after deployment put the following code into your .config file at the root of .ebextensions
01_write_custom_ng_conf.config
- Create a directory that will store your script.
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Vulnerabilities
No vulnerabilities reported
Install Single-Instance
You can use Single-Instance like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the Single-Instance component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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