Denis Kokin coquin

kafkacat -b localhost:9092 \
         -t _kafka-connect-group-01-status \
         -C \
         -o-3 \
         -c3 \
         -f 'Topic %t / Partition %p / Offset: %o / Timestamp: %T\nHeaders: %h\nKey (%K bytes): %k\nPayload (%S bytes): %s\n--\n'

Kafka 0.11.0.0 (Confluent 3.3.0) added support to manipulate offsets for a consumer group via cli kafka-consumer-groups command.

List the topics to which the group is subscribed

kafka-consumer-groups --bootstrap-server <kafkahost:port> --group <group_id> --describe

Note the values under "CURRENT-OFFSET" and "LOG-END-OFFSET". "CURRENT-OFFSET" is the offset where this consumer group is currently at in each of the partitions.

Reset the consumer offset for a topic (preview)

How to add a collapsible section in markdown

1. Example

Click me

Heading

Foo
Bar
- Baz

Qux

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

ETags: a pretty sweet feature of HTTP 1.1

HTTP caching review

HTTP provides two ways for servers to control client-side caching of page components:

freshness may be based on a date or a token whose meaning is app-specific
whether or not the client needs to confirm the cached version is up-to-date with the server

This breaks down as follows:

Cache locally and don't check before using.

ETags & If-None-Match headers: a dialogue

1st request.

browser: can haz foo?

GET /foo HTTP/1.1

1st response.

WARNING

This gist is outdated! For the most up-to-date information, please see http://emberjs.com/guides/routing/!

It All Starts With Templates

An Ember application starts with its main template. Put your header, footer, and any other decorative content in application.handlebars.

<header>

Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
	fetch = +refs/heads/*:refs/remotes/origin/*
	url = git@github.com:joyent/node.git

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this:

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

	{
	"bold_folder_labels": true,
	"color_scheme": "Packages/User/Espresso Soda.tmTheme",
	"ensure_newline_at_eof_on_save": true,
	"file_exclude_patterns":
	[
	".DS_Store",
	".gitkeep",
	"dump.rdb"
	],