Eric Avdey eiri

Example of using js-sequence diagram in gist

How to share

Bl.ocks is a nice way for sharing code examples hosted on gitHub gist. All that needed is just to replace “gist.github.com” with “bl.ocks.org” in the URL, e.g. http://bl.ocks.org/eiri/073a9e12f8246927ef997bf6f3ab5561

Sequence file loading

Sequence is just a simple text file loaded with syncronious ajax call.

CouchDB view compaction

Sequence diagram of CouchDB 2.0 compaction

Diaglam of calls during view compaction in CouchDB 2.0. Some steps omitted to simplify things.

View: http://bl.ocks.org/eiri/c436914e4115651c78d1eef9de68c70e

Start dev cluster:

$ ./dev/run --admin eiri:eiri
[ * ] Setup environment ... ok
[ * ] Ensure CouchDB is built ... ok
[ * ] Prepare configuration files ... ok
[ * ] Start node node1 ... ok
[ * ] Start node node2 ... ok
[ * ] Start node node3 ... ok
[ * ] Check node at http://127.0.0.1:15984/ ... ok

Working with local documents in CouchDB

Create

No such document

$ http :5984/koi/_local/020
{
    "error": "not_found", 
    "reason": "missing"
}

REST Cheatshit

REST to CRUD

POST - create
GET - read
PUT - update (replace)
PATCH - update (partial)
DELETE - delete
HEAD - verify

Short primer on using attachment in CouchDB

In db "koi" create a doc named "tesla"

$ http put :5984/koi/tesla name=alice
{
    "id": "tesla", 
    "ok": true, 
    "rev": "1-2350796167caec1f6ba70e9145a9e102"

Edit CouchDB design document with curl

create new database

$ curl -X PUT http://localhost:5984/koi
{"ok":true}

create a single document

$ curl -X POST http://localhost:5984/koi -d '{"name":"alice","age":25}' -H'Content-Type:application/json'

	- name: activate erlang 17.5 on login
	lineinfile:
	dest: /home/vagrant/.bashrc
	line: "{{item.line}}"
	insertafter: "{{item.insertafter}}"
	state: present
	with_items:
	- insertafter: "#alias l='ls -CF'"
	line: '# activate erlang 17.5'
	- insertafter: '# activate erlang 17.5'