dlecoconnier/ivet repository overview

⁠Summary

Ivet is a command line tool created to generate a schema for a janusgraph database and apply this schema. It has been inspired from Doctrine behaviour. The generate command creates a json file containing commands to execute. The file can be manually modified if you find migration is not complete or does not cover all you deserves. To keep trace of all applied migrations, migration names are saved into janusgraph server when upgrade is called. You can check at any moment the list of migrations both applied and not.

⁠Available commands

• generate
  • dir Dlls to analyze. If not set look in current working directory.
  • output Directory where to put migration file. If not set files are created in current directory.
  • ip localhost
  • port 8182
  • ssl Use SSL/TLS for JanusGraph connection (default: false)
  • sprintno Add a subdirectory when generating. Use it as you want
  • onefile Create one file per script
  • description Add a description to your migration
• list Display list of all migrations
  • input Directory where to find migration files. If not set look in current working directory.
  • ip localhost
  • port 8182
  • ssl Use SSL/TLS for JanusGraph connection (default: false)
• upgrade
  • input Can be a file or a directory containing migrations to be applied. If not set look in current working directory.
  • ip localhost
  • port 8182
  • ssl Use SSL/TLS for JanusGraph connection (default: false)
  • timeout Default evaluation timeout in milliseconds for Gremlin scripts. Can be overridden per script or per migration file in JSON

⁠Docker image

Docker image is available there:

• https://hub.docker.com/r/dlecoconnier/ivet⁠
• https://github.com/etrange02/Ivet/pkgs/container/ivet⁠

To use Docker image, run the following command replacing MyDir with your local directory

docker run -v MyDir:/app/Migrations -e ip=localhost ivet

See upgrade command to add your own parameters.

⁠Dotnet Tool

You can install Ivet as a dotnet tool

dotnet tool install --global Ivet

All versions are available on https://www.nuget.org/packages/Ivet⁠

After the package is installed you can use it like

Ivet list --input "C:\MigrationFiles"

⁠How to tag code?

Add Ivet.Model (https://www.nuget.org/packages/Ivet.Model⁠) to your project. You are now ready to tag your code. All names and possibilities are listed in Janusgraph documentation at https://docs.janusgraph.org/schema/⁠.

Tag a Vertex:

[Vertex]
public class MyVertex
{
    [PropertyKey]
    [PrimaryKey()]
    public string Id { get; set; }

    [PropertyKey(Name="NewName", Cardinality=Cardinality.SINGLE)]
    public string ANamedProperty { get; set; }

    [EdgeProperty]
    public List<Vertex3> AListProperty { get; private set; } = new List<Vertex3>();

    [EdgeProperty]
    public Vertex3[] AnArrayProperty { get; private set; } = Array.Empty<Vertex3>(); 
}

You can also specify a different name or a cardinality (details at https://docs.janusgraph.org/schema/#property-key-cardinality⁠):

[PropertyKey(Name="NewName", Cardinality=Cardinality.SINGLE)]
public string ANamedProperty { get; set; }

Tag an Edge:

[Edge(typeof(MyVertex1), typeof(MyVertex2))]
[Edge(typeof(MyVertex1), typeof(MyVertex3))]
public class EdgeWithProperties
{
    [PropertyKey]
    public int AProperty { get; set; }
}

You can also tag a property to be used with an index (https://docs.janusgraph.org/schema/index-management/index-performance/⁠):

[Vertex]
public class MyVertex
{
    [PropertyKey]
    [CompositeIndex("unicity_index", IsUnique = true)] // Set unicity of the data
    public string ACompositeIndexProperty { get; set; }

    [PropertyKey]
    [MixedIndex("vertex2_mixed", Backend = "search", Mapping = MappingType.TEXTSTRING)]
    public string SearchProperty { get; set; }
}

⁠Timeout & Resilience

Index operations (awaitGraphIndexStatus, REINDEX) can take a long time. By default, generated index scripts include a 5-minute evaluation timeout (300000 ms).

You can control the timeout at three levels (highest priority first):

1. Per script in JSON: "evaluationTimeout": 600000 inside a script entry
2. Per file in JSON: "evaluationTimeout": 600000 at the migration file level
3. CLI flag: --timeout 600000 on the upgrade command

Ivet upgrade --input ".\Migrations" --timeout 600000

⁠What's next?

You can now run a generate command in order to create migration files.

You can have some details of migrations with list.

> Ivet list --input ".\Migrations"

Directory: D:\Migrations

Migrations:
 --------------------------------------------------------------------------------------------------------------------------
 | Name                      | Relative path                  | Description | Date                | Multi? | Timeout  |
 --------------------------------------------------------------------------------------------------------------------------
 | Migration_202403032330_#0 | 12\Migration_202403032330.json | [0]         | 10/03/2024 14:21:54 | True   |          |
 --------------------------------------------------------------------------------------------------------------------------
 | Migration_202403032330_#1 | 12\Migration_202403032330.json | [1]         | 10/03/2024 14:22:04 | True   | 300000ms |
 --------------------------------------------------------------------------------------------------------------------------
 | Migration_202403032330_#2 | 12\Migration_202403032330.json | [2]         | 10/03/2024 14:22:14 | True   | 300000ms |
 --------------------------------------------------------------------------------------------------------------------------

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