pulsar | Event driven concurrent framework for Python | Reactive Programming library
kandi X-RAY | pulsar Summary
kandi X-RAY | pulsar Summary
Event driven concurrent framework for Python
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Top functions reviewed by kandi - BETA
- Sort a value
- Write the response to the database
- Pack multiple values into a single array
- Pack arguments
- Decode data from the server
- Return a chunk of length bytes
- Mask the given data using the given key
- Daemonize the system
- Return a WsgiResponse object
- Initialize headers
- Handles redirect
- Spawn an actor
- Start serving
- Notify actor
- Return information about this process
- Decorator to wrap RPC methods
- Run a worker greenlet greenlet
- Runs the upload
- Handle GET requests
- Stops the actor
- Remove a range from the tree
- Run Sphinx extension
- Build many linux wheel files
- Get the configured logger
- Render an error message
- Removes a node from the tree
pulsar Key Features
pulsar Examples and Code Snippets
Lines of Code : 61
License : No License
CopyActionReply Smb4KMountHelper::mount(const QVariantMap &args)
{
...
command << args["mh_command"].toString();
command << args["mh_unc"].toString();
command << args["mh_mountpoint"].toString();
command << args["mh_options" apiVersion: pulsar.apache.org/v1alpha1
kind: PulsarCluster
metadata:
name: example-pulsarcluster
spec:
zookeeper:
size: 3
autoRecovery:
size: 3
bookie:
size: 3
broker:
size: 3
proxy:
size: 3
apiVersion: pulsar.apache. $ kubectl create -f deploy/crds/pulsar_v1alpha1_pulsarcluster_cr.yaml
$ kubectl get pods
NAME READY STATUS RESTARTS AGE
example-pulsarcluster-bookie-autorecovery-deployment-6775f2 #!/usr/bin/env python3
# Copyright (c) Meta Platforms, Inc. and affiliates.
# All rights reserved.
#
# This source code is licensed under the BSD-style license found in the
# LICENSE file in the root directory of this source tree.
"""
This example d #!/usr/bin/env python3
# Copyright (c) Meta Platforms, Inc. and affiliates.
# All rights reserved.
#
# This source code is licensed under the BSD-style license found in the
# LICENSE file in the root directory of this source tree.
"""
This example d #!/usr/bin/env python3
# Copyright (c) Meta Platforms, Inc. and affiliates.
# All rights reserved.
#
# This source code is licensed under the BSD-style license found in the
# LICENSE file in the root directory of this source tree.
"""
This example d for ax in g.axes.flat:
ax.grid(b=True, which="both")
method = ax.title.get_text().split('=')[1][1:]
xmin = tempdf[tempdf['method']==method]['x1'].values
xmax = tempdf[tempdf['method']==method]['x2'].values
ax.set_xlim(xfor ax, xmin, xmax in zip(g.axes.flat, tempdf['x1'], tempdf['x2']):
ax.grid(b=True, which="both")
ax.set_xlim(xmin, xmax)
color_pub = rospy.Publisher("/detect_object_color", String, queue_size=10)
color_pub.publish("purple")
>>> print('\n') # newline
>>> print('\\n') # backslash, n
\n
>>> print(repr('\\n')) # representation of backslash, n
'\\n'
Community Discussions
Trending Discussions on pulsar
QUESTION
I am trying to setup an asynchronous consumer for Apache Pulsar, but my problem is only 1 message is received and no other messages come through unless I restart my Spring Boot application. Unfortunately, the documentation around using the CompletableFuture with Pulsar is not great and I am new to using them.
My code below:
...ANSWER
Answered 2021-Apr-22 at 22:55In order to prevent such excess memory consumption, you will want to add an intermediate data structure to your class that limits the number of outstanding CompletableFutures such as a LinkedBlockingQueue as shown below
QUESTION
Topic says it all.
My guess is that the delivery guarantees of Pulsar make this question nonsensical but I would like to know for sure.
...ANSWER
Answered 2021-Mar-29 at 15:13Generally speaking, producer shouldn't know about consumer's actions - this is the whole point of introducing message brokers between two parties. Pulsar can guarantee that message will be residing in the topic until all subscriptions acknowledge it.
Saying that - to accomplish you goal you need to have a pair (producer-consumer) on each side and pair of topics, once message is consumed, another message is sent with the notification about successful consumption.
To be able to achieve guarantees that both acknowledge and sending confirmation to another topic happen together or not happen together you need to use transactional API that Pulsar provides, both those actions should happen in one transaction
QUESTION
I've been considering some multiple consumer problem with my system and unfortunately I'm really stuck. I mean - I see some solutions, which are below, but they are propably not enought efficient. Let me introduce system:
User has their specific Id. User can be logged on diffrent devices - many mobiles, many browsers in this same time. When user is offline every message which user has got should be provide when user is online. When user is online, should be kept informed on a regular basis about messages. Every user, when is online is connected by WebSocket.
So I have been thinking about message brokers from this pool - rabbitmq, kafka, apache pulsar ( All system above will be in Java ). And this is my thoughs about this:
Rabbitmq - Every device gets their own queue associated with client Id. But here i see some troubles. For example - user gonna log in 4 browsers and each will get new queue ( of course I assume that some not used queue will be deleted after time but this solution can be overloaded if somebody just wanna do this ).
One queue with marker for every user which messages were consumed - I tried implement this with apache Pulsar but my every attempt was running out with created new consumer (not continue as the same consumer) - Maybe I can't use this API?
Apache kafka - groups and partitions? Its similiar to point 1.
I will be really gratefull for every single hint - If You see some better solutions with other technology just let me know - I will adjust to this.
( If it matters - Java and SpringBoot are core of this )
...ANSWER
Answered 2021-Mar-23 at 08:32I can respond for the apache pulsar part - you need to set SubscriptionName in consumer to be equal to your UserId, this will ensure messages to be consumed starting from the last acknowledged one for that user.
QUESTION
I have two modules like education and transport. I want to create modules and components for these. How to create a perfect folder structure for these. If anyone knows please help.
...ANSWER
Answered 2021-Mar-10 at 15:23May be following folder structure would be useful for you!
QUESTION
I followed the manual here: pulsar functions
I have this function declaration in Java:
...ANSWER
Answered 2021-Feb-18 at 07:29You need to specify an output topic and consume the output topic: --output exclamation-topic
QUESTION
I have been breaking my head with adding the below functionality in UI using HTML5 BOOTSTRAP-CSS-JS.
I am trying to create UI Dropdowns by consuming JSON input.
NOTE: The "JSON keys" are also to be consumed as dropdowns values rather than just the general "JSON values".. hence, i am unable to work out a logic for the same!
I have JSONs in the exact below format:
...ANSWER
Answered 2021-Feb-09 at 14:01I tried to make it clean as possible
QUESTION
Clickhouse allows high performance writes but only if they are done in bulk and with intervals (recommended is at least 1 second interval between inserts). In the documentation to JDBC connector for Clickhouse batchSize option exists but there is nothing about intervals between inserts and I didn't manage to find insertion logic in the code (I am not a Java guy though).
Does it mean there are no intervals and Pulsar simply does inserts as frequently as it can?
...ANSWER
Answered 2021-Feb-06 at 19:11I know nothing about Pulsar.
recommended is at least 1 second interval between inserts
That recommendation is "one insert per second". Nothing about 1 second to sleep.
This recommendation is too basic and very vague.
Every project is unique, has own environment and requirements.
In one project I insert 10mil. very wide rows per minute with RAID 10 with HDD disks.
In another project I do 1000 inserts with ~100 narrow rows each per second using In-memory parts with single NVME disk.
QUESTION
Trying to configure a basic color detection in my ROS project, I got stuck in this: I have two python scripts where "programa.py" is my main robot program and the "camara.py" is my openCV color detection script.
Right now I can change the color detection publishing a string message when camara.py is running:
...ANSWER
Answered 2020-Dec-11 at 17:51You can write a publisher for that.
Define a publiser in your init
QUESTION
I'm trying to run a Pulsar DebeziumPostgresSource connector.
This is the command I'm running:
...ANSWER
Answered 2020-Nov-22 at 20:47In my case, the root cause was an expired TLS certificate.
QUESTION
I'm working on a complex application that uses an Ignite version of log4j2. It works perfectly fine, but when I try to add a Pulsar appender it throws an error:
...ANSWER
Answered 2020-Jul-24 at 14:00The error message you are getting is coming from Log4J 1. This indicates Log4J 2 isn’t being used, which would explain why it can’t find the pulsar appender.
If you want to use Log4J 2 you need to re-examine your dependencies.
This also indicates it isn’t using your logging configuration.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install pulsar
You can use pulsar like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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