Indigo

This is a shared library for sharing functionality between various components in a running Indigo system. It is intended to be included by the indigo-web and indigo-agent components.

Configuration

Configuration is specified with the INDIGO_CONFIG environment variable

export INDIGO_CONFIG=settings

The file at settings.py only needs to be changed should the Cassandra Keyspace name change. By default the keyspace is called Indigo.

Functionality provided

Models

Activity

Blob

Collection

Group

Node

Resource

Search

User

Errors

This module contains Indigo model-specific exceptions to be handled if problems occur when writing to the database, such as UniqueError to be raised when an attempt is made to write a new Collection with the name of an existing one.

Command Line Interface

Whenever indigo is installed in a sub-component's virtualenv, the indigo command is available from inside the activated virtualenv to interact with the system.

Create the database

Creates/Syncs the database defined in configuration with the latest models.

indigo create

Create a user

Provides a guided interface to create a new user. You will be asked if this is an administrative user, their password and their email address.

indigo user-create

List all users

Displays a list of all known users within the current indigo system.

indigo user-list

Create a group

Creates a new group within the system. Requires the name of the group and the name of the owning user.

indigo group-create GROUP_NAME OWNING_USERNAME

List all groups

List all currently known groups

indigo group-list

Add user to group

Adds a user to a group by specifying the group name and the username

indigo group-add-user GROUP_NAME USER_NAME

Delete a group

Deletes the specified group

indigo group-delete GROUP_NAME

Ingest data

The ingest command is used to import existing data into the Indigo system. By providing a directory the command will walk the files and sub-folders within that directory adding them as collections and resources in Indigo. The created collection structure will mirror the provided local directory.

This command needs at least 3 arguments, they are:

1. group - The group name which will be given ownership of the newly created resources and collections
2. user - The user who will be used to create the resources and collections.
3. folder - The local folder to be ingested.

By default, all created resources are stored in Cassandra (the system default), and are created with URLs that point to a Blob in the Cassandra DB. It is possible to create the collections and resources but without uploading any files - this will mean that the created resource URLs will point to the local agent (which will then deliver the content). To perform this type of import the noimport and localip are required. The first is a boolean flag, the second a string with the IP address of the local agent.

Examples

Import a local folder into Cassandra

Imports all of the folders and resources under /data into Cassandra.

indigo ingest --group TEST_GROUP--user TEST_USER --folder /data 

Import into Indigo but leave the resources on disk

In this case it is important that the agent is configured to point to /data for its disk storage as the URLs created will be relative to this. So a local file /data/test/somedata.csv will be given the URL file://192.168.10.10/test/somedata.csv.

indigo ingest --group TEST_GROUP--user TEST_USER --folder /data --localip 192.168.10.10 --noimport