Metadata

Store metadata in a process

The metadata for a process allows you to store arbitrary JSON data with that process, e.g. if you have an app that uses the datarhei Core API you can store app-specific information in the metadata.

In order not to conflict with other apps that might write to the metadata as well, you have to provide a key under which your metadata is stored. Think of a namespace or similar.

Create, Update

Add or update the metadata for a process and key.

Example: Write a metadata object into the metadata for the process test and key desc.

Curl

curl http://127.0.0.1:8080/api/v3/process/test/metadata/desc \
   -H 'accept: application/json' \
   -H 'Content-Type: application/json' \
   -X POST \
   -d '{
         "title": "My title",
         "description": "My description."
      }'

PyClient

from core_client import Client

client = Client(
    base_url="http://127.0.0.1:8080"
)
client.login()

client.v3_process_put_metadata(
    id="test",
    key="desc",
    data={
        "title": "My title",
        "description": "My description."
    }
)

GoClient

import (
    "github.com/datarhei/core-client-go/v16"
)

client, _ := coreclient.New(coreclient.Config{
    Address: "https://127.0.0.1:8080",
})

data := map[string]string{
    "title": "My title",
    "description": "My description.",
}

err := client.ProcessMetadataSet("test", "desc", data)
if err != nil {
    ...
}

Description:

Add JSON metadata with a process under the given key

Add arbitrary JSON metadata under the given key. If the key exists, all already stored metadata with this key will be overwritten. If the key doesn't exist, it will be created.

PUT//api/v3/process/{id}/metadata/{key}

Authorization

ApiKeyAuth

Path parameters

id*string

Process ID

key*string

Key for data store

Body

application/json

Arbitrary JSON data. The null value will remove the key and its contents

any

Response

200400404

OK

Body

application/json

any

Request

JavaScriptCurl

const response = await fetch('//api/v3/process/{id}/metadata/{key}', {
    method: 'PUT',
    headers: {
      "Content-Type": "application/json"
    },
});
const data = await response.json();

Read

Read out the stored metadata. The key is optional. If the key is not provided, all stored metadata for that process will be in the result.

Example: read the metadata object for process test that is stored under the key desc.

Curl

curl http://127.0.0.1:8080/api/v3/process/test/metadata/desc \
   -H 'accept: application/json' \
   -X GET

PyClient

from core_client import Client

client = Client(
    base_url="http://127.0.0.1:8080"
)
client.login()

client.v3_process_get_metadata(
    id="test",
    key="desc"
)

GoClient

import (
    "fmt"
    "github.com/datarhei/core-client-go/v16"
)

client, _ := coreclient.New(coreclient.Config{
    Address: "https://127.0.0.1:8080",
})

metadata, err := client.ProcessMetadata("test", "desc")
if err != nil {
    ...
}

fmt.Printf("%+v\n", metadata)

Description:

Retrieve JSON metadata stored with a process under a key

Retrieve the previously stored JSON metadata under the given key. If the key is empty, all metadata will be returned.

GET//api/v3/process/{id}/metadata/{key}

Authorization

ApiKeyAuth

Path parameters

id*string

Process ID

key*string

Key for data store

Response

200400404

OK

Body

application/json

any

Request

JavaScriptCurl

const response = await fetch('//api/v3/process/{id}/metadata/{key}', {
    method: 'GET',
    headers: {},
});
const data = await response.json();