danidiaz

Vertical decomposition. Creating cohesive services

One of the biggest misconceptions about services is that a service is an independent deployable unit, i.e., service equals process. With this view, we are defining services according to how components are physically deployed. In our example, since it’s clear that the backend admin runs in its own process/container, we consider it to be a service.

But this definition of a service is wrong. Rather you need to define your services in terms of business capabilities. The deployment aspect of the system doesn’t have to be correlated to how the system has been divided into logical services. For example, a single service might run in different components/processes, and a single component might contain parts of multiple services. Once you start thinking of services in terms of business capabilities rather than deployment units, a whole world of options open.

What are the Admin UI

sanchezzzhak

SELECT table,
    formatReadableSize(sum(bytes)) as size,
    min(min_date) as min_date,
    max(max_date) as max_date
    FROM system.parts
    WHERE active
GROUP BY table

nigelmcnie

# Create a quantum, which represents an exact point in time. Internally, the point of time is stored
# as UTC
> t1 = quantum.now()
<Quantum(2014-10-01 20:23:57.745648, no timezone)>

# We can ask for that point of time "at" a certain timezone. Relevant for datemath and display
> t1.at('Pacific/Auckland')
<Quantum(2014-10-01 20:23:57.745648, Pacific/Auckland)>

# We can get a naive datetime out of it at any TZ

mbostock

license: gpl-3.0

Autoplectic

#!/usr/bin/env python
###############################################################################
# Ryan James

"""
This pre-commit hook runs nosetests and pylint, reporting their scores.
It blocks commits with failing tests.

To install
----------

urschrei

""" 
required packages:
numpy
matplotlib
basemap: http://matplotlib.org/basemap/users/installing.html
shapely: https://pypi.python.org/pypi/Shapely
descartes: https://pypi.python.org/pypi/descartes
random

janogarcia

<?php
/**
* PHP Regex to validate a Twitter hashtag
* 
* Useful for validating a text input (an HTML form in your CMS or custom application) that must be a valid Twitter hashtag.
* Valid examples: #a, #_, #_1, #_a, #1a, #áéìôü, #123hàsh_täg446
* Invalid examples: #1, ##hashtag, #hash-tag, #hash.tag, #hash tag, #hashtag!, (any hashtag that is more than 140 characters long, hash symbol included)
* 
* Regex explanation:
* First, the lookahead assertion (?=.{2,140}$) checks the minimum and max length, as explained here http://stackoverflow.com/a/4223213/1441613

pmahoney

Orien is correct, it is the fork() system call triggered by ProcessBuilder or Runtime.exec or other means of the JVM executing an external process (e.g. another JVM running ant, a git command, etc.).

There have been some posts on the Jenkins mailing lists about this: Cannot run program "git" ... error=12, Cannot allocate memory

There is a nice description of the issue on the SCons dev list: fork()+exec() vs posix_spawn()

There is a long standing JVM bug report with solutions: Use posix_spawn, not fork, on S10 to avoid swap exhaustion. But I'm not sure if this actually made it into JDK7 as the comments suggest was the plan.

In summary, on Unix-like systems, when one process (e.g. the JVM) needs to launch another process (e.g. git) a system call is made to

vsajip

import logging
import random
import re


class DelegatingHandler(logging.Handler):
    def __init__(self, *handlers):
        logging.Handler.__init__(self)
        self.handlers = handlers
    

beniwohli

# original XML at http://www.w3.org/Math/characters/unicode.xml
# XSL for conversion: https://gist.github.com/798546


unicode_to_latex = {
    u"\u0020": "\\space ",
    u"\u0023": "\\#",
    u"\u0024": "\\textdollar ",
    u"\u0025": "\\%",
    u"\u0026": "\\&",