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doc: Entity store query API documentation
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‎docs/src/operate/registration/register.md‎

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@@ -85,18 +85,28 @@ GET /v1/entities/{topic-id}
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curl http://localhost:8000/tedge/entity-store/v1/entities/device/child01
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```
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## Query Entities
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### Query All Entities
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List all entities registered with thin-edge starting from the `main` device.
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## Query entities
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**Endpoint**
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```
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GET /v1/entities
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```
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**Query parameters**
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| Parameter | Description | Examples |
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|-----------|------------------------------------------------------------------------|-------------------------------------|
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| `root` | Entity tree starting from the given `root` node (including it) | `device/child2//` |
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| `parent` | Direct child entities of the given `parent` entity (excluding it) | `device/main//` |
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| `type` | Entities of the given entity `type` | `main`, `child-device` or `service` |
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The following restrictions apply:
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* Multiple values can not be specified for the same parameter.
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* The same parameter can not be repeated multiple times.
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* The `root` and `parent` parameters can not be used together.
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**Responses**
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* 200: OK
@@ -107,39 +117,320 @@ GET /v1/entities
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"@type": "device"
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},
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{
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"@topic-id": "device/main/service/tedge-agent",
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"@topic-id": "device/main/service/service0",
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"@type": "service",
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"@parent": "device/main//"
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},
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{
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"@topic-id": "device/child0//",
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"@type": "child-device",
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"@parent": "device/main//"
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},
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{
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"@topic-id": "device/child1//",
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"@type": "child-device",
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"@parent": "device/main//"
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},
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{
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"@topic-id": "device/child00//",
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"@type": "child-device",
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"@parent": "device/child0//"
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},
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{
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"@topic-id": "device/child01//",
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"@type": "child-device",
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"@parent": "device/child0//"
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}
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...
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]
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```
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* 404: Not Found
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```
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Entity not found with topic id: device/unknown/topic/id
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```
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**Example**
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**Examples**
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To demonstrate different query examples, the following entity tree is assumed as the base:
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```
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main
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|-- service0
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|-- service1
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|-- child0
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| |-- child00
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| | |-- child000
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|-- child1
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| |-- service10
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|-- child2
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| |-- service20
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| |-- child20
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| | |-- child200
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| |-- child21
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| | |-- service210
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| | |-- child210
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| |-- child22
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```
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### Query all entities
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List all entities registered with thin-edge starting from the `main` device at the root.
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**Request**
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```shell
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curl http://localhost:8000/tedge/entity-store/v1/entities
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```
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**Response**
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```json
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[
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{
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"@topic-id": "device/main//",
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"@type": "device"
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},
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{
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"@topic-id": "device/main/service/service0",
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"@type": "service",
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"@parent": "device/main//"
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},
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{
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"@topic-id": "device/main/service/service1",
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"@type": "service",
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"@parent": "device/main//"
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},
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{
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"@topic-id": "device/child0//",
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"@type": "child-device",
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"@parent": "device/main//"
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},
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{
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"@topic-id": "device/child1//",
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"@type": "child-device",
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"@parent": "device/main//"
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},
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{
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"@topic-id": "device/child2//",
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"@type": "child-device",
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"@parent": "device/main//"
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},
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{
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"@topic-id": "device/child00//",
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"@type": "child-device",
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"@parent": "device/child0//"
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},
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{
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"@topic-id": "device/child1/service/service10",
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"@type": "service",
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"@parent": "device/child1//"
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},
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{
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"@topic-id": "device/child2/service/service20",
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"@type": "service",
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"@parent": "device/child2//"
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},
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{
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"@topic-id": "device/child20//",
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"@type": "child-device",
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"@parent": "device/child2//"
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},
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{
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"@topic-id": "device/child21//",
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"@type": "child-device",
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"@parent": "device/child2//"
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},
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{
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"@topic-id": "device/child22//",
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"@type": "child-device",
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"@parent": "device/child2//"
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},
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{
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"@topic-id": "device/child200//",
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"@type": "child-device",
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"@parent": "device/child20//"
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},
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{
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"@topic-id": "device/child21/service/service210",
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"@type": "service",
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"@parent": "device/child21//"
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},
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{
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"@topic-id": "device/child210//",
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"@type": "child-device",
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"@parent": "device/child21//"
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}
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]
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```
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### Query from a root
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Query the entity tree from a given root node.
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**Request**
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```shell
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curl http://localhost:8000/tedge/entity-store/v1/entities?root=device/child2//
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```
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**Response**
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```json
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[
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{
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"@topic-id": "device/child2//",
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"@type": "child-device",
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"@parent": "device/main//"
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},
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{
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"@topic-id": "device/child2/service/service20",
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"@type": "service",
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"@parent": "device/child2//"
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},
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{
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"@topic-id": "device/child20//",
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"@type": "child-device",
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"@parent": "device/child2//"
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},
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{
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"@topic-id": "device/child21//",
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"@type": "child-device",
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"@parent": "device/child2//"
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},
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{
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"@topic-id": "device/child22//",
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"@type": "child-device",
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"@parent": "device/child2//"
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},
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{
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"@topic-id": "device/child200//",
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"@type": "child-device",
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"@parent": "device/child20//"
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},
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{
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"@topic-id": "device/child21/service/service210",
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"@type": "service",
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"@parent": "device/child21//"
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},
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{
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"@topic-id": "device/child210//",
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"@type": "child-device",
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"@parent": "device/child21//"
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}
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]
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```
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### Query by parent
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Query only the immediate child entities of a `parent`, excluding any nested entities.
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**Request**
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```shell
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curl http://localhost:8000/tedge/entity-store/v1/entities?parent=device/child2//
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```
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**Response**
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```json
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[
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{
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"@topic-id": "device/child2/service/service20",
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"@type": "service",
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"@parent": "device/child2//"
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},
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{
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"@topic-id": "device/child20//",
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"@type": "child-device",
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"@parent": "device/child2//"
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},
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{
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"@topic-id": "device/child21//",
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"@type": "child-device",
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"@parent": "device/child2//"
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},
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{
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"@topic-id": "device/child22//",
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"@type": "child-device",
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"@parent": "device/child2//"
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}
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]
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```
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### Query by type
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Query all entities of type: `child-device`
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**Request**
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```shell
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curl http://localhost:8000/tedge/entity-store/v1/entities?type=child-device
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```
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**Response**
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```json
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[
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{
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"@topic-id": "device/child0//",
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"@type": "child-device",
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"@parent": "device/main//"
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},
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{
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"@topic-id": "device/child1//",
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"@type": "child-device",
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"@parent": "device/main//"
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},
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{
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"@topic-id": "device/child2//",
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"@type": "child-device",
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"@parent": "device/main//"
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},
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{
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"@topic-id": "device/child00//",
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"@type": "child-device",
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"@parent": "device/child0//"
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},
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{
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"@topic-id": "device/child20//",
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"@type": "child-device",
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"@parent": "device/child2//"
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},
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{
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"@topic-id": "device/child21//",
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"@type": "child-device",
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"@parent": "device/child2//"
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},
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{
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"@topic-id": "device/child22//",
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"@type": "child-device",
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"@parent": "device/child2//"
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},
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{
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"@topic-id": "device/child200//",
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"@type": "child-device",
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"@parent": "device/child20//"
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},
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{
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"@topic-id": "device/child210//",
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"@type": "child-device",
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"@parent": "device/child21//"
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}
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]
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```
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### Query with multiple parameters
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Query all child services of the parent: `device/child2//`.
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**Request**
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```shell
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curl 'http://localhost:8000/tedge/entity-store/v1/entities?parent=device/child2//&type=service'
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```
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**Response**
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```json
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[
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{
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"@topic-id": "device/child2/service/service20",
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"@type": "service",
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"@parent": "device/child2//"
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},
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{
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"@topic-id": "device/child21/service/service210",
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"@type": "service",
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"@parent": "device/child21//"
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}
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]
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```
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## Delete entity
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Deleting an entity results in the deletion of its immediate and nested child entities as well, to avoid leaving orphans behind.

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