scheduler | Scala library for scheduling arbitrary code | Continuous Deployment library

by PagerDuty Scala Version: Current License: Non-SPDX

X-Ray Key Features Code Snippets(3)Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | scheduler Summary

scheduler is a Scala library typically used in Devops, Continuous Deployment, Docker, Spark applications. scheduler has no bugs, it has no vulnerabilities and it has low support. However scheduler has a Non-SPDX License. You can download it from GitHub.

This library schedules arbitrary Scala code (tasks) to run at an arbitrary time. It tries to do this despite changing infrastructure, and it tries to maintain some sense of task ordering. Scheduler is in production use at PagerDuty. It's meant to be included in Scala services deployed on many servers for redundancy and scaling. It's designed from the ground up to be running in a multi-datacenter environment. We take fault tolerance and reliability very seriously, so using this library is a little more complicated then just including it via SBT. Scheduler relies on Kafka for task buffering and Cassandra for task persistence. Most documentation is in the specific guides in doc/.

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Quality

Security

License

Reuse

Support

scheduler has a low active ecosystem.

It has 204 star(s) with 39 fork(s). There are 24 watchers for this library.

It had no major release in the last 6 months.

There are 7 open issues and 15 have been closed. On average issues are closed in 2 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of scheduler is current.

Quality

scheduler has no bugs reported.

Security

scheduler has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

scheduler has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

scheduler releases are not available. You will need to build from source code and install.

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scheduler Key Features

No Key Features are available at this moment for scheduler.

scheduler Examples and Code Snippets

Create a Scheduler from a dataset id .

python

Lines of Code : 118

License : Non-SPDX (Apache License 2.0)

Copy

def from_dataset_id(processing_mode,
                    service,
                    dataset_id,
                    element_spec=None,
                    job_name=None,
                    consumer_index=None,
                    num_consumers=Non

Initialize the scheduler .

python

Lines of Code : 35

License : Non-SPDX (Apache License 2.0)

Copy

def __init__(self,
               strategy,
               cluster_spec,
               task_type,
               task_id,
               session_config=None,
               rpc_layer="grpc",
               worker_barrier=None):
    """Initialize the

Initialize the scheduler .

python

Lines of Code : 32

License : Non-SPDX (Apache License 2.0)

Copy

def __init__(self, fetches, contraction_fn):
    """Creates an _ElementFetchMapper.

    This is the fetch mapper used for leaves in the fetch struct.  Because of
    the expansions mechanism, a leaf can actually fetch more than one tensor.

    Also

Community Discussions

Trending Discussions on scheduler

Async loop on a new thread in rust: the trait `std::future::Future` is not implemented for `()`

Cannot install additional requirements to apache airflow

PVCs not created at all after deletion, when using Retail reclaim policy in corresponding StorageClass

java.lang.IllegalStateException when collecting flow from SqlDelight in ViewModel

room/SQLite background scheduler/trigger that runs automatically

org.springframework.security.web.access.AccessDeniedException: Access is Denied

Moving non-Copy variable into async closure: captured variable cannot escape `FnMut` closure body

Usage example of pragma Task_Dispatching_Policy(Non_Preemptive_FIFO_Within_Priorities);

Why doesn't an infite loop lock an OS?

Complete all tasks, but no more K tasks at the same time via Project Reactor

QUESTION

Async loop on a new thread in rust: the trait `std::future::Future` is not implemented for `()`

Asked 2021-Jun-14 at 17:28

I know this question has been asked many times, but I still can't figure out what to do (more below).

I'm trying to spawn a new thread using std::thread::spawn and then run an async loop inside of it.

The async function I want to run:

...

ANSWER

Answered 2021-Jun-14 at 17:28

#[tokio::main] converts your function into the following:

Source https://stackoverflow.com/questions/67966950

QUESTION

Cannot install additional requirements to apache airflow

Asked 2021-Jun-14 at 16:35

I am using the following docker-compose image, I got this image from: https://github.com/apache/airflow/blob/main/docs/apache-airflow/start/docker-compose.yaml

...

ANSWER

Answered 2021-Jun-14 at 16:35

Support for _PIP_ADDITIONAL_REQUIREMENTS environment variable has not been released yet. It is only supported by the developer/unreleased version of the docker image. It is planned that this feature will be available in Airflow 2.1.1. For more information, see: Adding extra requirements for build and runtime of the PROD image.

For the older version, you should build a new image and set this image in the docker-compose.yaml. To do this, you need to follow a few steps.

Create a new Dockerfile with the following content:

Source https://stackoverflow.com/questions/67851351

QUESTION

PVCs not created at all after deletion, when using Retail reclaim policy in corresponding StorageClass

Asked 2021-Jun-14 at 15:38

I am using the ECK operator, to create an Elasticsearch instance.

The instance uses a StorageClass that has Retain (instead of Delete) as its reclaim policy.

Here are my PVCs before deleting the Elasticsearch instance

...

ANSWER

Answered 2021-Jun-14 at 15:38

with the hope that due to the Retain policy, the new pods (i.e. their PVCs would bind to the existing PVs (and data wouldn't get lost)

It is explicitly written in the documentation that this is not what happens. the PVs are not available for another PVC after delete of a PVC.

the PersistentVolume still exists and the volume is considered "released". But it is not yet available for another claim because the previous claimant's data remains on the volume.

Source https://stackoverflow.com/questions/67971628

QUESTION

java.lang.IllegalStateException when collecting flow from SqlDelight in ViewModel

Asked 2021-Jun-14 at 06:21

I am trying to use SqlDelight database in my app.

In my DAO, I have a function called getRecipeById to query the database and return a flow of domain model (Recipe). Here is the implementation of the function: (Note: RecipeTable is the name of the table, or I guess I should have called it RecipeEntity)

...

ANSWER

Answered 2021-Jun-14 at 06:21

I don't think MutableState is designed to be used in the ViewModel layer, since it's an observable integrated with the compose runtime. You could create a MutableStateFlow instead and use collectAsState() from the view layer.

In your case the issue is probably, because of the state is captured in a coroutine invoked outside composition.

Source https://stackoverflow.com/questions/67963766

QUESTION

room/SQLite background scheduler/trigger that runs automatically

Asked 2021-Jun-14 at 06:08

I've got a sample table:

I have a Sample table which has a "creationDate" as an atribute. What I want is a way to increment(update) the "numOfTimesUpdated" attribute each 24h since the creationdate. so lets say "creationdate" is 01.01.2021 12:12 AM => numOfTimesUpdated=0, 02.01.2021 12:12 AM => numOfTimesUpdated=1, 03.01.2021 12:12 AM => numOfTimesUpdated=3.

How can I implement something like this in the best way?

Does SQLite has some kind of background scheduler/trigger where a UPDATE Query gets automatically called? Or Is my only chance the client side(application) using smth. like an ApplicationManager?

...

ANSWER

Answered 2021-Jun-14 at 06:08

How can I implement something like this in the best way? You don't appear to even need a numberOfTimesUpdated column as the number of days since the creationDate can be calculated when required.

If the date/time were stored in a supported format (e.g. YYYY-MM-DD HH:MM) it is very simple.

For example consider this :-

Source https://stackoverflow.com/questions/67962269

QUESTION

org.springframework.security.web.access.AccessDeniedException: Access is Denied

Asked 2021-Jun-14 at 02:53

dispatcher-servlet.xml

...

ANSWER

Answered 2021-Jun-14 at 02:53

This issue is solved after correcting up my code

Source https://stackoverflow.com/questions/67764058

QUESTION

Moving non-Copy variable into async closure: captured variable cannot escape `FnMut` closure body

Asked 2021-Jun-13 at 18:47

I'm trying to get clokwerk to schedule an asynchronous function to run every X seconds.

The docs show this example:

...

ANSWER

Answered 2021-Jun-13 at 18:47

In order to understand what's going on, I'll reformat the code a bit in order to make it more clear and explicit:

Your original code:

Source https://stackoverflow.com/questions/67960931

QUESTION

Usage example of pragma Task_Dispatching_Policy(Non_Preemptive_FIFO_Within_Priorities);

Asked 2021-Jun-13 at 17:46

I have a large, heavily task oriented program, and I would like to explore variant scheduler policies. I am using Gnat Ada 2020. In particular, I would like to set the tasking model by use of the pragma:

pragma Task_Dispatching_Policy(Non_Preemptive_FIFO_Within_Priorities);

I don't think I understand the actual usage very well. I understand what the pragma does, but I am having difficulty placing the pragma correctly, at least according to GNAT. For various combinations of placement in the following small program, I always get the error : "incorrect placement for configuration pragma "Task_Dispatching_Policy" I have tried outside of the whole compilation unit, within the task type spec, within the task body spec, etc. Can anyone show me an example of usage of this pragma? Googling found many discussions but no actual examples of usage in source code. Thanks in advance.

...

ANSWER

Answered 2021-Jun-13 at 17:46

I am having difficulty placing the pragma correctly.

Focusing on correct placement, note that a Task_Dispatching_Policy pragma is a configuration pragma that must "appear before the first compilation_unit of a compilation."

at least according to GNAT.

As @egilhh comments, the GNAT User Guide describes how tp accomplish this in 3.4.1. Handling of Configuration Pragmas:

Configuration pragmas may either appear at the start of a compilation unit, or they can appear in a configuration pragma file to apply to all compilations performed in a given compilation environment.

In the case of a single compilation unit, simply place the pragma before the first context clause, as shown here:

Source https://stackoverflow.com/questions/67943882

QUESTION

Why doesn't an infite loop lock an OS?

Asked 2021-Jun-13 at 15:32

Say you had a process running some code that looked like this

...

ANSWER

Answered 2021-Jun-13 at 11:38

From some research, it looks like computers have a hardware timer called a programmable interval timer (PIT), which the OS can use to set a time in the future to cause an "interrupt" in some milliseconds or nanoseconds in the future.

Source https://stackoverflow.com/questions/67957746

QUESTION

Complete all tasks, but no more K tasks at the same time via Project Reactor

Asked 2021-Jun-13 at 09:41

I'm beginner in Project Reactor and think it's pretty easy, but I can't find the solution. I have N expensive tasks to do, and I want to implement something like Bounded Semaphore in Java (do not request next element until current count of running task less than K). Shortly: complete all tasks, but no more K tasks at the same time

...

ANSWER

Answered 2021-Jun-12 at 14:18

What about this solution? I removed parallel from Flux, in order to bufferize 10 elements. Each elements can be then handled in parallel

Source https://stackoverflow.com/questions/67948584

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