periodic | performing calculations on time intervals
kandi X-RAY | periodic Summary
kandi X-RAY | periodic Summary
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- MergePeriods returns a new slice of Periods in ascending order .
- S12HourDisplay returns a hexadecimal representation of d .
- MonStartToSunStart converts a weekday to a time . Weekday .
- Difference returns a new Period representing p .
- NewFloatingPeriod creates a new FloatingPeriod
- NewApplicableDaysMonStart returns a new ApplicableDaysMonStart instance
- NewContinuousPeriod creates a ContinuousPeriod
- new node constructor
- MaxTime returns the most recent time .
- MinTime returns the first time .
periodic Key Features
periodic Examples and Code Snippets
Lines of Code : 2License : Non-SPDX (NOASSERTION)
Copygo get github.com/spothero/periodic
dep ensure -add github.com/spothero/periodic
Community Discussions
Trending Discussions on periodic
QUESTION
There is a Java 11 (SpringBoot 2.5.1) application with simple workflow:
- Upload archives (as multipart files with size 50-100 Mb each)
- Unpack them in memory
- Send each unpacked file as a message to a queue via JMS
When I run the app locally java -jar app.jar its memory usage (in VisualVM) looks like a saw: high peaks (~ 400 Mb) over a stable baseline (~ 100 Mb).
When I run the same app in a Docker container memory consumption grows up to 700 Mb and higher until an OutOfMemoryError. It appears that GC does not work at all. Even when memory options are present (java -Xms400m -Xmx400m -jar app.jar) the container seems to completely ignore them still consuming much more memory.
So the behavior in the container and in OS are dramatically different.
I tried this Docker image in DockerDesktop Windows 10 and in OpenShift 4.6 and got two similar pictures for the memory usage.
Dockerfile
...ANSWER
Answered 2021-Jun-13 at 03:31In Java 11, you can find out the flags that have been passed to the JVM and the "ergonomic" ones that have been set by the JVM by adding -XX:+PrintCommandLineFlags to the JVM options.
That should tell you if the container you are using is overriding the flags you have given.
Having said that, its is (IMO) unlikely that the container is what is overriding the parameters.
It is not unusual for a JVM to use more memory that the -Xmx option says. The explanation is that that option only controls the size of the Java heap. A JVM consumes a lot of memory that is not part of the Java heap; e.g. the executable and native libraries, the native heap, metaspace, off-heap memory allocations, stack frames, mapped files, and so on. Depending on your application, this could easily exceed 300MB.
Secondly, OOMEs are not necessarily caused by running out of heap space. Check what the "reason" string says.
Finally, this could be a difference in your app's memory utilization in a containerized environment versus when you run it locally.
QUESTION
There are various types of refs in git, some of the most common of which are branches (stored in .git/refs/heads), remote-tracking branches (.git/refs/remotes), and tags (.git/refs/tags).
But it's also possible to create and use arbitrary non-standard refs that live elsewhere under .git/refs. This can be useful for storing custom metadata in the repository that you don't expect users will want to interact with directly. For example, GitHub uses these kinds of refs to expose references to pull request branches, and the Emacs git client Magit uses them to save uncommitted changes periodically, when the appropriate setting is enabled. Such refs would generally need to be manipulated using the so-called "plumbing" commands of git, since the user-facing "porcelain" commands don't know about or support them.
I was playing around with non-standard refs using the plumbing command git update-ref and found some odd behavior:
ANSWER
Answered 2021-May-19 at 13:49No, it's by design. Here is a comment from the source code:
QUESTION
Currently I have written the ifelse statement to get the correct symbol pattern. But I want to know how I can write tryCatch for this statement? Because sometimes getSymbols returns error if symbol doesn't have correct extension.
...ANSWER
Answered 2021-Jun-12 at 07:58Have you tried wrapping the complete code inside tryCatch ?
QUESTION
Quick note: this error may be somewhat linked to this thread, but the use case and python version (the other one is still at v2) is different. Other similar threads don't regard specifically to python datetime.
I have the following code:
...ANSWER
Answered 2021-Jun-12 at 01:35This seems like a problem with the dependency that I'm using (UnixDateTimeField) as the error thrown out was pointed toward the package in my virtual environment.
I resorted to store the time in an integer field:
QUESTION
I am reading about JWKS and found information about the key rotation concept - https://developer.okta.com/docs/concepts/key-rotation/
Let's assume I use JWKS in my application but I don't fetch them periodically, so just hardcoded. The single key JSON object looks like
...ANSWER
Answered 2021-Jun-11 at 21:32JSON Web Key Set (JWKS aka JWK Set) is a list of JSON Web Keys (JWKs). Since JWK Set is simply a container, it contains no metadata such as an expiration date/time.
It does not expose this for at least two reasons:
- RFC 7517 is the specification that governs the behavior of JWKs and JWK Set. It does not mention or require the provider to publish an expiration date/time. Perhaps this is so due to reason #2:
- The provider should be able to remove keys for any reason at any time. Possible reason: key has been compromised. (For a private/public keypair, this would mean the private key has been compromised and the corresponding public key published via JWKS should be removed from circulation). This example is an outlier but it does happen and the provider would have to act immediately to fix it.
Emergencies notwithstanding, providers do rotate keys on a regular basis as a matter of good security hygiene. To handle key rotation (be it planned or emergency), your application should adhere to a simple algorithm. It should periodically fetch the keys from JWKS endpoint, build a local replica of all keys and add/remove keys from this replica based on the last fetch. Only keys found in the local replica should be used by your application to perform a cryptographic operation such as verifying a signature on a JWT.
Each JWK has a kid (key id) parameter and this parameter is used to match a specific key. RFC 7517 recommends using kid to choose among a set of keys within a JWK Set during key rollover. When your application does a fetch of keys from JWKS, you'll be comparing the set of keys coming from JWKs to the set of keys in your local replica. The comparison is based on kid. If a key with some kid is present in JWKS but not present in your local replica, you should add this key to your replica. Vice versa, if a key with some kid is present in your local replica but not present in JWKS, you should remove this key from your local replica.
How frequently should your application fetch the keys from JWKS? This is up to you, it depends on the risk tolerance of your app and/or your organization. Some apps fetch every minute, others do it hourly or daily.
Let's say your app never does this fetch, the key is hardcoded in your app. This will work until the key is removed by the provider. (We're assuming that we're talking about a public key here. A JWK could represent a private key...and that you will not want to embed into your app). Some providers don't rotate keys or do so once in a very long while. If you're dealing with a well-known (to you) provider and they guarantee to you that they won't rotate keys, your risk of embedding a key into your app is low.
In general, embedding a public key into the app is not a good idea. If you're going to be using a JWKS endpoint, implement a simple fetch + update solution as outlined above.
QUESTION
I have made changed in the standalone.xml file as below :
...ANSWER
Answered 2021-Jun-11 at 18:17You can use the levels filter on the handler to filter the log messages you would like to see in the handler. You can configure logging with the following CLI commands:
QUESTION
I have a list with widget constructors which are strings, that are used in different classes. The list consists of 39 labels and these 39 labels have different text some pages will have only 7 labels, how during iteration can i show only the number of labels that the class displays as a string?
...ANSWER
Answered 2021-Jun-11 at 06:50I was able to get through this road block by having one list with all the widgets looping them and adding it to another list which worked wonders for what i was looking for: results = [];
QUESTION
This is my first post here and I am not that experienced, so please excuse my ignorance.
I am building a Monte Carlo simulation in C++ for my PhD and I need help in optimizing its computational time and performance. I have a 3d cube repeated in each coordinate as a simulation volume and inside every cube magnetic particles are generated in clusters. Then, in the central cube a loop of protons are created and move and at each step calculate the total magnetic field from all the particles (among other things) that they feel.
At this moment I define everything inside the main function and because I need the position of the particles for my calculations (I calculate the distance between the particles during their placement and also during the proton movement), I store them in dynamic arrays. I haven't used any class or function,yet. This makes my simulations really slow because I have to use eventually millions of particles and thousands of protons. Even with hundreds it needs days. Also I use a lot of for and while loops and reading/writing to .dat files.
I really need your help. I have spent weeks trying to optimize my code and my project is behind schedule. Do you have any suggestion? I need the arrays to store the position of the particles .Do you think classes or functions would be more efficient? Any advice in general is helpful. Sorry if that was too long but I am desperate...
Ok, I edited my original post and I share my full script. I hope this will give you some insight regarding my simulation. Thank you.
Additionally I add the two input files
...ANSWER
Answered 2021-Jun-10 at 13:17I talked the problem in more steps, first thing I made the run reproducible:
QUESTION
ANSWER
Answered 2021-Jun-10 at 06:37You can use in below way:
QUESTION
I have a set of data that gets updated periodically by a client. Once a month or so we will download a new set of this data. The dataset is about 50k records with a couple hundred columns of data.
I am trying to create a database that houses all of this data so we can run our own analysis on it. I'm using PostgreSQL and Python (psycopg2).
Occasionally, the client will add columns to the dataset, so there are a number of steps I want to take:
- Add new records to the database table
- Compare the old set of data with the new set of data and update the table where necessary
- Keep the old records, and either add an "expired" flag, or an "db_expire_date" to keep track of whether a record is active or expired
- Add any new columns of data to the database for all records
I know how to add new records to the database (1) using INSERT INTO, and how to add new columns of data to the database (4) using ALTER TABLE. But having issues with (2) and (3). I figured out how to update a record, using the following code:
...ANSWER
Answered 2021-Jun-09 at 01:29For step 2) First, you have to identify the records that have the same data for this you can run a select query with where clause before inserting any recode and count the number of records you receive as output. If the count is more than 0 don't insert the recode otherwise you can insert the recode.
For step 3) For this, you can insert a column as you mention above with the name 'db_expire_date' and insert the expiration value at the time of record insertion only.
You can also use a column like 'is_expire' but for that, you need to add a cron job that can update the DB periodically for the value of this column.
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