disruptor | The LMAX Disruptor in Ruby
kandi X-RAY | disruptor Summary
kandi X-RAY | disruptor Summary
The reference Java implementation is more of a framework than a pattern. I have simply taken the core concepts of the Disruptor. The code may serve as a handy companion for Ruby developers digging into the Disruptor Technical Paper. There is a simple Queue implementation, if you're after a lock-free queue.
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Top functions reviewed by kandi - BETA
- Waits until the buffer is present
- Starts the next thread
- Write the next cursor to the current cursor .
- Processes the next sequence of the queue
- Stop the buffer .
- Increment the next sequence
- Pushes a packet onto the buffer .
- Set up a buffer .
- Add a new processor .
- Flushes all processes .
disruptor Key Features
disruptor Examples and Code Snippets
Community Discussions
Trending Discussions on disruptor
QUESTION
If this already has an answer, I haven't managed to find it. I have spent many hours getting this far, before throwing in the towel and asking here! When it comes to Maven, I would describe myself as a 'Sunday driver'.
Plugin versions: compiler=3.9.0; resurce and dependencies=3.2.0; jar=3.2.2; assembly=3.3.0.
I have two Maven projects, let's call then AppA and Proj1. Proj1 contains all of the 'working' code and 3rd party jar dependencies.
AppA contains the Main class and the app's folders such as 'conf' and 'logs'. Both projects have 'jar' packaging.
AppA's pom has the plugins required to create the jar file with a manifest that defines all of the required jar files in its classpath as 'lib/xxx.jar'. It also has 'Proj1' as a dependency.
The problem I have is that Maven is assembling the zip file before copying all of the dependent jars to the 'lib' folder. Which means that the 'lib' folder is missing from the zip file.
If I build AppA from a single project, the zip file is assembled after the 'lib' folder has been populated,
Can anyone advise me whatI need to do to persuade Maven to copy the dependent jar files to 'lib' before assembling the zip file?
The reason that I have this structure is so that I can create AppB + Proj1 in the future.
Also, the lib file contains all of the Maven plugin jars and their dependencies. When I buils from a single project, they are excluded.
[pom.xml]
...ANSWER
Answered 2022-Jan-24 at 16:12It happens because the maven-assembly-plugin
executes on a prior phase (package
) than the the maven-dependency-plugin
phase (install
). Try to set up the execution of the plugins so it will act as you expect.
I would also suggest a different approach which I think can simplify you build configuration - use a multi-module pom which will aggregate both project. Than on the concrete pom.xml
of AppA
use Proj1
as a dependency. It will saves you from copying around files and repackage.
QUESTION
I’m currently stuck on an issue that’s happening with our sticky nav.
When a user scrolls down the screen very slowly our second navigation which is a sticky nav, flickers for some reason. I don’t know what it could be.
I’ve tried adding “-webkit-transform: translateZ(0);” to the “.affix” and ".affix-top" classes with no luck.
This issue is only happening on Chrome and Edge. Firefox, IE11 and Safari this issue does not occur thankfully.
What's causing this? How can/if this be resolved?
Here’s the JS to the sticky nav:
...ANSWER
Answered 2022-Jan-22 at 17:08In order to make it works, please make the next things:
- Add position sticky (and other styles) to this element:
2A. Remove the code that toggle between .affix and .affix-top
OR:
2B 1. If you can't do step 2A, you can add this height instead (in order to make affix and affix-top to be with the same height):
2B 2. Remove position: fixed from affix and position static from affix-top (they don't need positions cause we set position to their parent)
In addition, I don't know if it's third party code or not but please try to not use !important property. It's hard to set style for those elements.
QUESTION
I tried to implement Lmax in python .I tried to handle data in 4 processes
...ANSWER
Answered 2021-Oct-11 at 13:06Your first problem is that the target of a Process
call cannot be within the if __name__ == '__main__':
block. But:
As I mentioned in an earlier post of yours, the only way I see that you can share an instance of CircularBuffer
across multiple processess is to implement a managed class, which surprisingly is not all that difficult to do. But when you create a managed class and create an instance of that class, what you have is actually a proxy reference to the object. This has two implications:
- Each method call is more like a remote procedure call to a special server process created by the manager you will start up and therefore has more overhead than a local method call.
- If you print the reference, the class's
__str__
method will not be called; you will be printing a representation of the proxy pointer. You should probably rename method__str__
to something likedump
and call that explicitly whenever you want a representation of the instance.
You should also explicitly wait for the completion of the processes you are creating so that the manager service does not shutdown prematurely, which means that each process should be assigned to a unique variable and have a unique name.
QUESTION
I am trying to project a flat data source into an object that can be serialized directly to JSON using Newtonsoft.Json. I've created a small program in Linqpad with an imagined inventory overview as a test. The requested output is as follows:
- Site name
- Inventory name
- Product name
- Weight
- Units
- Inventory name
- Product (etc)
- Inventory name
For the life of me I can't get it to only have a single "Site name" as the only root object. I want an to list the contents inside an inventory inside a site, but it always ends up looking like:
How can I make the "Site" distinct having a collection of "inventory" which each has a collection of "products"?
My actual data source is a database table and it resembles the structure of my test object - and it is what it is.
The test code in Linqpad: (note that it references Newtonsoft.Json)
...ANSWER
Answered 2021-Sep-14 at 15:17Ok I have a solution using dictionaries which will group everything properly:
QUESTION
I am trying to analyze and implement mixed sync and async logging. I am using Spring boot application along with disruptor API. My log4j configuration:
...ANSWER
Answered 2021-Apr-27 at 07:41I'm not really sure what you think you are testing.
When additivity is enabled the log event will be copied and placed into the Disruptor's Ring Buffer where it will be routed to the console appender on a different thread. After placing the copied event in the buffer the event will be passed to the root logger and routed to the Console Appender in the same thread. Since both the async Logger and sync Logger are doing the same thing they are going to take approximately the same time. So I am not really sure why you believe anything will be left around by the time the System.out call is made.
When you only use the async logger the main thread isn't doing anything but placing events in the queue, so it will respond much more quickly and it would be quite likely your System.out message would appear before all log events have been written.
I suspect there is one very important piece of information you are overlooking. When an event is routed to a Logger the level specified on the LoggerConfig the Logger is associated with is checked. When additivity is true the event is not routed to a parent Logger (there isn't one). It is routed to the LoggerConfig's parent LoggerConfig. A LoggerConfig calls isFiltered(event) which ONLY checks Filters that have been configured on the LoggerConfig. So even though you have level="info" on your Root logger, debug events sent to it via the AsyncLogger will still be logged. You would have to add a ThresholdFilter to the RootLogger to prevent that.
QUESTION
Recently, when I write data into elasticsearch with BulkRequest, I got the following exception:
...ANSWER
Answered 2021-Mar-10 at 05:01ES _id field doesn't support blank char like "".
You have 2 options:
Always provide an id
You just need to remove the id field that you have and elastic will assign an auto-generated one in "_id" field. Something like
QUESTION
I have added a field to metadata for transferring and persisting in the status index. The field is a List of String and its name is input_keywords. After running topology in the Strom cluster, The topology halted with the following logs:
...ANSWER
Answered 2021-Mar-01 at 10:25You are modifying a Metadata instance while it is being serialized. You can't do that, see Storm troubleshooting page.
As explained in the release notes of 1.16, you can lock the metadata. This won't fix the issue but will tell you where in your code you are writing into the metadata.
QUESTION
we're migrating domains and some but not all content. The URL structure is different.
Below is what I have in my .htaccess file. I only added the code at the end starting with "#User added 301 Redirect", the other entries were in .htaccess already.
Expected/Desired: I want anyone who goes to the old main domain to the new main domain, and anyone who attempts to access these specific pages of the old site/domain to go to the mapping in the new site.
Observed: the main domain 301 works olddomain.com now goes to newdomain.com, or if the file name/path is exactly the same. Redirects follow he taxonomy of the old domain, not use my mapping. So, "olddomain.com/about-me" tries to go to "newdomain.com/about-me" instead of the correct mapping "newdomain.com/about" as shown in the .htaccess file and results in a 401 file not found error.
Thoughts? Feel free to respond like I'm five years old.
...ANSWER
Answered 2021-Feb-28 at 17:27You could try redirect directives in following order:
QUESTION
We want to centralize all our java application logs on Graylog server. We use apache tomcat as a container and log4j for the logging framework. log4j2.xml
...ANSWER
Answered 2021-Jan-27 at 15:13Finally solved. According to documentation
GELF TCP does not support compression due to the use of the null byte (\0) as frame delimiter.
So after disabling compress on the log4j2
configuration we saw our log on the gray log server. The below code snippet is a working example
QUESTION
I am running Apache Ignite .Net in a Kubernetes cluster on Linux nodes.
Recently I updated my ignite 2.8.1 cluster to v2.9. After the update some of the services being parts of the cluster fail to start up with the following message:
*** stack smashing detected ***: terminated
Interestingly, most often it happens with the 2nd instances of the same microservice. The first instances usually start up successfully (but sometimes the first instances fail, too). Another observation is that it happens to the nodes which publish Service Grid services. Sometimes a full cluster recycle (killing all the nodes then spinning them up again) helps to get all the nodes to start up, sometimes not.
Did I mess up something during the update? What should I check first of all?
Below is an excerpt from the Ignite log.
...ANSWER
Answered 2020-Dec-10 at 15:14stack smashing detected
usually indicates a NullReferenceException
in C# code.
Set COMPlus_EnableAlternateStackCheck
environment variable to 1
before running your app to see full stack trace (this works for .NET Core 3.0 and later).
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Install disruptor
On a UNIX-like operating system, using your system’s package manager is easiest. However, the packaged Ruby version may not be the newest one. There is also an installer for Windows. Managers help you to switch between multiple Ruby versions on your system. Installers can be used to install a specific or multiple Ruby versions. Please refer ruby-lang.org for more information.
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