janus | Thread-safe asyncio-aware queue for Python | Reactive Programming library
kandi X-RAY | janus Summary
kandi X-RAY | janus Summary
Thread-safe asyncio-aware queue for Python
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Top functions reviewed by kandi - BETA
- Put an item into the queue
- Notify sync
- Check if the queue is forbidden
- Adds an item to the queue
- Get an item from the queue
- Notify the sync
- Mark all tasks as done
- Mark the task as done
- Wait for all tasks to finish
- True if the queue is full
- Return the size of the sequence
- Get the next value from the queue
- Return True if the queue is empty
janus Key Features
janus Examples and Code Snippets
Lines of Code : 33License : Strong Copyleft (CC BY-SA 4.0)
Copydf['datetime'] = pd.to_datetime(df['datetime'])
df.groupby(['name', df['datetime'].dt.date]).sum()
df.groupby(['name', pd.Grouper(key='datetime', freq='D')]).sum()
vimport asyncio
import logging
import time
import threading
import typing as t
# pip install --user janus
import janus
LOG = logging.getLogger(__name__)
# Queue must be created within the event loop it will be used from. Start as
# None import asyncio
import janus
import time
def my_heavy_function(sync_q):
for i in range(10):
sync_q.put(i)
time.sleep(1)
sync_q.put('end') # is there a more elegant way to do this ?
sync_q.join()
async def docker run -it janusgraph/janusgraph /bin/bash
root@8542ed1b8232:/opt/janusgraph# ls data
grateful-dead-janusgraph-schema.groovy tinkerpop-crew-typed.json
grateful-dead-typed.json tinkerpop-crew-v2d0-typed.cd /path/to/janus
bin/janusgraph.sh start
bin/gremlin.sh -e scripts/load_data.script
if result:
# tell asyncio to enqueue the result
fut = asyncio.run_coroutine_threadsafe(
tasks.completed.put(result), loop)
# wait for the result to be enqueued
fut.result()
if result:
# g.addV('person').property('name','cegprakash').as('c').
addV('question').property('title','Using gremlin-python Janus for social networking application').as('q1').
addV('question').property('title','Working of CCD algorithm for Inverseg = traversal().withRemote(DriverRemoteConnection('ws://localhost:8182/gremlin','g'))
from gremlin_python.process.anonymous_traversal import traversal
from gremlin_python.driver.driver_remote_connection import Driv# this requires you to pass "loop" as well
loop.call_soon_threadsafe(output_queue.put_nowait, line)
async def watch_dir(dir_to_watch, output_queue):
proc = await asyncio.create_subprocess_exec(
'sudo', import asyncio
from aiohttp import web
from aiojobs.aiohttp import setup
import janus
async def ticket_maker(q: janus.Queue):
counter = 1
while True:
print(f'Made ticket {counter}')
await q.async_q.put(counter)
Community Discussions
Trending Discussions on janus
QUESTION
I have a data frame that looks like this...
...ANSWER
Answered 2022-Mar-17 at 03:32Don't resample, but use the date in the groupby:
QUESTION
We have users with our Android App that have Android 5 and major and we know that there is a security patch to avoid in them the Janus vulnerability, allowing that old Android versions to accept the v2 sign of the .apk. Then, we are trying to build an .apk without the JAR v1 sign (enableV1Signing false) for Android 5 or major and the build works. But then apksigner say "DOES NOT VERIFY" and also when we try to upload the .apk to the Store it is rejected. So, does it possible to avoid the v1 sign for Android 5 or major? If not, how we can publish the app excluding the users with Android 5 and 6 who haven't the Janus security patch installed? Thanks in advance.
...ANSWER
Answered 2022-Feb-04 at 12:25V2 signing was introduced in Android 7, so there is no way to escape v1 signing for users on Android 5 and 6.
In Google Play, you can upload multiple APKs in one release, so if you really wanted, you could upload one APK with minSdkVersion=21 with v1 and v2 signatures, and another one with minSdkVersion=24 with v2 signature alone. You will need to make sure that the latter one (24) has a higher versionCode than the former (21) to ensure that they are served as you expect to your users.
QUESTION
While exploring the JanusGraph-core library, I seen the id generation part (StandardIDPool.nextID()), which seems to be id for a janus vertex is getting generated by the application logic. In this case, how can I horizontally scale an application that is using janusGraph, can't I get id conflicting problem while scaling the application?
What is the best approach to scale the app that use JanusGraph?
...ANSWER
Answered 2022-Jan-26 at 06:54The JanusGraph instances for a graph select one instance that maintains an ID pool manager. The JanusGraph reference documentation says the following about optimizing ID allocation:
ID Block Size
Each newly added vertex or edge is assigned a unique id. JanusGraph’s id pool manager acquires ids in blocks for a particular JanusGraph instance. The id block acquisition process is expensive because it needs to guarantee globally unique assignment of blocks. Increasing ids.block-size reduces the number of acquisitions but potentially leaves many ids unassigned and hence wasted. For transactional workloads the default block size is reasonable, but during bulk loading vertices and edges are added much more frequently and in rapid succession. Hence, it is generally advisable to increase the block size by a factor of 10 or more depending on the number of vertices to be added per machine.
Rule of thumb: Set ids.block-size to the number of vertices you expect to add per JanusGraph instance per hour.
Important: All JanusGraph instances MUST be configured with the same value for ids.block-size to ensure proper id allocation. Hence, be careful to shut down all JanusGraph instances prior to changing this value.
ID Acquisition Process
When id blocks are frequently allocated by many JanusGraph instances in parallel, allocation conflicts between instances will inevitably arise and slow down the allocation process. In addition, the increased write load due to bulk loading may further slow down the process to the point where JanusGraph considers it failed and throws an exception. There are three configuration options that can be tuned to avoid this.
- ids.authority.wait-time configures the time in milliseconds the id pool manager waits for an id block application to be acknowledged by the storage backend. The shorter this time, the more likely it is that an application will fail on a congested storage cluster.
Rule of thumb: Set this to the sum of the 95th percentile read and write times measured on the storage backend cluster under load. Important: This value should be the same across all JanusGraph instances.
- ids.renew-timeout configures the number of milliseconds JanusGraph’s id pool manager will wait in total while attempting to acquire a new id block before failing.
Rule of thumb: Set this value to be as large feasible to not have to wait too long for unrecoverable failures. The only downside of increasing it is that JanusGraph will try for a long time on an unavailable storage backend cluster.
QUESTION
I want to broadcast live music from a server to around 100 mobile phone clients in a local area network. The goal is a setup known from silent-discos, but over IP with mobile phones as receivers. The listeners should use headphones, no perfect sync is required. A delay of 1-3 sec would be acceptable.
My first setup used Icecast (TCP based), which lead to a good music quality but high delay (4-50 sec). My second approach uses Janus WebRTC server (with streaming plugin) that achieves sub-second delay, but the audio quality is only medium (optimized for voice, no consistent playback speed).
I found this issue describing an SRT server that supports multiple client connections.
Should I optimize my Janus/WebRTC approach for music, or try to build a solution with SRT, or is there an even better protocol/solution?
...ANSWER
Answered 2022-Jan-04 at 21:55I would recommend WebRTC. You can pull the feed in a browser, then you don't need to install a client on all those 100 phones.
How are you publishing the audio for WebRTC (to your Janus server)? If possible I would use a WebRTC Agent where you have greater control.
Janus using the streaming plugin provides a really easy way to publish via GStreamer or ffmpeg. You can get greater control over the audio quality that way.
QUESTION
I am developing a video conferencing solution using a media server called janus. It transmits the microphone and camera using WebRTC. I don't want the laptop light to come on when only the mic is on. However, like when only the camera is on, the indicator light comes on when only the microphone is on. How do I solve this?
...ANSWER
Answered 2021-Dec-08 at 07:00I assume by WebRTC, you are getting user's mic/webcam through navigator.mediaDevices.getUserMedia. I believe the camera light is controlled by the laptop driver and you cannot control it. However, if you do not need video, you can set the constraint parameter:
QUESTION
I have a MySQL table with School Data that looks like this:
...ANSWER
Answered 2021-Nov-24 at 08:42You can use
QUESTION
As the title indicates using gStreamer or VLC I can get the video to show without issues with the command below
gst-launch-1.0 rtspsrc protocols=tcp location="rtsp://{USER}:{PASSWD}@{URL}:63554/axis-media/media.amp?videocodec=h264" short-header=TRUE ! rtph264depay ! decodebin ! fpsdisplaysink
I can set it as a Network Stream in VLC as below with similar results
rtsp://{USER}:{PASSWD}@{URL}:63554/axis-media/media.amp?stream=0&videocodec=h264
but janus (latest/stable: v0.11.3) configuration as below is unable to show the stream on the webpage
...ANSWER
Answered 2021-Sep-19 at 13:05Janus Gateway/Server just doesn't support interleaved mode. And with current implementation of RTSP support inside Janus Streaming Plugin (Curl based) it's almost impossible to add such support there.
QUESTION
I am using Janus videoroom with Webrtc. Everything working fine. But when i go for ending call. And dismiss the current view controller - App Crashed.
I am unable to get the point of crashing so i can resolve.
the current view disappeared fine also. Logs shows this:
...ANSWER
Answered 2021-Aug-28 at 11:54Make sure you have something like this in your deinit ("screen dismissed completely"?):
QUESTION
ANSWER
Answered 2021-Aug-09 at 17:07If the child component is position absolute then it shouldn’t change the size according to my knowledge. But if the position is relative you can solve the problem by adding min-width and height snd max-width and height in pixels. Other than that I don’t have any solutions.
QUESTION
I am building an app that works with janus gateway via websocket and webrtc. everything works fine, I can send and receive voice calls successfully but insertDtmf metod doesnt send my dtmf to other peer. Same account and same codes in android works fine. Here is where I prepare webrtc
...ANSWER
Answered 2021-Jul-05 at 20:39In my case, this is how I have handled insert DTMF functionality.
a - First filter out audio RTCRtpSender track:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install janus
You can use janus 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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