First of all, Ensure that the user which will be running this call has the Change backup settings and control backup process privilege.
#
# TC Backup Launcher
# Script to launch a backup on the TeamCity Server
#
Param(
[Parameter(Mandatory=$true)][string]$username,
[Parameter(Mandato...
Describes a dependency relationship between actors, the parent and child releationship. Parent is unique because it has created the child actor, so the parent is responsible for reacting when failures happens in his child.
And parent decides which choice needs to be selected. When a parent receives...
There are two type of supervision strategies that we follow to supervise any actor:
One-For-One Strategy
One-For-All Strategy
case object ResumeException extends Exception
case object StopException extends Exception
case object RestartException extends Exception
override v...
PHP lacks a build-in function to encrypt and decrypt large files. openssl_encrypt can be used to encrypt strings, but loading a huge file into memory is a bad idea.
So we have to write a userland function doing that. This example uses the symmetric AES-128-CBC algorithm to encrypt smaller chunks of...
Suppose you have two views ViewA and ViewB
Instance of ViewB is created inside ViewA, so ViewA can send message to ViewB's instance, but for the reverse to happen we need to implement delegation (so that using delegate ViewB's instance could send message to ViewA)
Follow these steps to implement t...
Applications running in non-development environments often require database updates. After using the Add-Migration command to create your database patches there's the need to run the updates on other environments, and then the test environment as well.
Challenges commonly faced are:
no Visual S...
To get random data from certain collection refer to $sample aggregation.
db.emplyees.aggregate({ $sample: { size:1 } })
where size stands for number of items to select.
In order to get the total number of commits that each developer or contributor has made on a repository, you can simply use the git shortlog:
git shortlog -s
which provides the author names and number of commits by each one.
Additionally, if you want to have the results calculated on all branch...
from pymongo import MongoClient
uri = "mongodb://localhost:27017/"
client = MongoClient(uri)
db = client['test_db']
# or
# db = client.test_db
# collection = db['test_collection']
# or
collection = db.test_collection
collection.save({"hello":"world"...
import cv2
import numpy as np
import urllib
stream=urllib.urlopen('http://96.10.1.168/mjpg/video.mjpg')
bytes=''
while True:
bytes+=stream.read(1024)
a = bytes.find('\xff\xd8') # JPEG start
b = bytes.find('\xff\xd9') # JPEG end
if a!=-1 and b!=-1:
jpg = bytes[a:b+...
First you have to generate public and private keys using OpenSSL(tutorial).
var express = require("express");
var http =require ("http");
var https=require ("https");
var fs=require("fs");
var app=express();
var httpsKeys={
key:fs.readFileSync("&l...
Nested serializers by default don't support create and update. To support this without duplicating DRF create/update logic, it is important to remove the nested data from validated_data before delegating to super:
# an ordinary serializer
class UserProfileSerializer(serializers.ModelSerializer):
...
The only way if your components does not have a parent-child relationship (or are related but too further such as a grand grand grand son) is to have some kind of a signal that one component subscribes to, and the other writes into.
Those are the 2 basic operations of any event system: subscribe/li...
This fetches the value of NOW() in local time, in India Standard Time, and then again in UTC.
SELECT NOW();
SET time_zone='Asia/Kolkata';
SELECT NOW();
SET time_zone='UTC';
SELECT NOW();
This is really easy. All TIMESTAMP values are stored in universal time, and always converted to the present time_zone setting whenever they are rendered.
SET SESSION time_zone='America/Los_Angeles';
SELECT timestamp_sold
FROM sales
WHERE state_sold = 'CA'
Why is this? TIMESTAMP values are...
Javascript timestamps are based on the venerable UNIX time_t data type, and show the number of milliseconds since 1970-01-01 00:00:00 UTC.
This expression gets the current time as a Javascript timestamp integer. (It does so correctly regardless of the current time_zone setting.)
ROUND(UNIX_TIMEST...
