Using resource labels

This page shows how to add, view, edit, and remove labels on Cloud Healthcare API resources. Labels are key-value pairs you can use to organize resources. You can attach a label to individual resources, then filter the resources based on their labels. Information about labels is forwarded to the billing system, so you can break down your billing charges by label.

You can use labels with the following Cloud Healthcare API resources:

  • FHIR stores
  • DICOM stores
  • HL7v2 stores
  • HL7v2 messages

Labels are available using the REST or RPC APIs. Labels are not available in the gcloud command-line tool or Google Cloud Console.

Label requirements

The labels applied to a resource must meet the following requirements:

  • Each resource can have multiple labels, up to a maximum of 64.
  • Each label must be a key-value pair.
  • Keys have a minimum length of 1 character and a maximum length of 63 characters, and cannot be empty. Values can be empty and have a maximum length of 63 characters.
  • Keys and values can contain only lowercase letters, numeric characters, underscores, and dashes. All characters must use UTF-8 encoding and international characters are allowed.
  • The key of a label must be unique in a single resource, but you can use the same key with multiple resources.
  • Keys must start with a lowercase letter or international character.

Adding a label

The following sample shows how to add a label to an existing FHIR store.

For example, you could use the label to signify that the FHIR store is being used as a test environment. The key for the label would be environment and the value would be test.

curl command

To add a label to an existing FHIR store, make a PATCH request and specify the following information:

  • The name of the parent dataset
  • The name of the FHIR store
  • The label data to update
  • An update mask set to labels
  • An access token

The following sample shows a PATCH request using curl.

curl -X PATCH \
    -H "Authorization: Bearer "$(gcloud auth print-access-token) \
    -H "Content-Type: application/json; charset=utf-8" \
    --data "{
      'labels': {
        'KEY' : 'VALUE'
      }
     }" "https://healthcare.googleapis.com/v1beta1/projects/PROJECT_ID/locations/REGION/datasets/DATASET_ID/fhirStores/FHIR_STORE_ID?updateMask=labels"

If the request is successful, the server returns a 200 OK HTTP status code and the response in JSON format:

200 OK
{
  "name": "projects/PROJECT_ID/locations/REGION/datasets/DATASET_ID/fhirStores/FHIR_STORE_ID",
  "labels": {
    "KEY": "VALUE"
  }
}

PowerShell

To add a label to an existing FHIR store, make a PATCH request and specify the following information:

  • The name of the parent dataset
  • The name of the FHIR store
  • The label data to update
  • An update mask set to labels
  • An access token

The following sample shows a PATCH request using Windows PowerShell.

$cred = gcloud auth print-access-token
$headers = @{ Authorization = "Bearer $cred" }

Invoke-WebRequest `
  -Method Patch `
  -Headers $headers `
  -ContentType: "application/json; charset=utf-8" `
  -Body "{
      'labels': {
        'KEY': 'VALUE'
      }
  }" `
  -Uri "https://healthcare.googleapis.com/v1beta1/projects/PROJECT_ID/locations/REGION/datasets/DATASET_ID/fhirStores/FHIR_STORE_ID?updateMask=labels" | Select-Object -Expand Content

If the request is successful, the server returns a 200 OK HTTP status code and the response in JSON format:

200 OK
{
  "name": "projects/PROJECT_ID/locations/REGION/datasets/DATASET_ID/fhirStores/FHIR_STORE_ID",
  "labels": {
    "KEY": "VALUE"
  }
}

Adding multiple labels

The following sample shows how to add multiple labels to an existing FHIR store. To add multiple labels, separate each label by a comma.

For example, you could use the labels to signify that the FHIR store is being used as a test environment and that it's used for a research team.

The key for the first label would be environment and the value would be test. The key for the second label would be team and the value would be research.

curl command

To add multiple labels to an existing FHIR store, make a PATCH request and specify the following information:

  • The name of the parent dataset
  • The name of the FHIR store
  • The label data to update as a comma-delimited list of key-value pairs
  • An update mask set to labels
  • An access token

The following sample shows a PATCH request using curl.

curl -X PATCH \
    -H "Authorization: Bearer "$(gcloud auth print-access-token) \
    -H "Content-Type: application/json; charset=utf-8" \
    --data "{
      'labels': {
        'KEY_1' : 'VALUE_1',
        'KEY_2' : 'VALUE_2'
      }
     }" "https://healthcare.googleapis.com/v1beta1/projects/PROJECT_ID/locations/REGION/datasets/DATASET_ID/fhirStores/FHIR_STORE_ID?updateMask=labels"

If the request is successful, the server returns a 200 OK HTTP status code and the response in JSON format:

200 OK
{
  "name": "projects/PROJECT_ID/locations/REGION/datasets/DATASET_ID/fhirStores/FHIR_STORE_ID",
  "labels": {
    "KEY_1": "VALUE_1",
    "KEY_2": "VALUE_2"
  }
}

PowerShell

To add a label to an existing FHIR store, make a PATCH request and specify the following information:

  • The name of the parent dataset
  • The name of the FHIR store
  • The label data to update as a comma-delimited list of key-value pairs
  • An update mask set to labels
  • An access token

The following sample shows a PATCH request using Windows PowerShell.

$cred = gcloud auth print-access-token
$headers = @{ Authorization = "Bearer $cred" }

Invoke-WebRequest `
  -Method Patch `
  -Headers $headers `
  -ContentType: "application/json; charset=utf-8" `
  -Body "{
      'labels': {
        'KEY_1': 'VALUE_1',
        'KEY_2': 'VALUE_2'
      }
  }" `
  -Uri "https://healthcare.googleapis.com/v1beta1/projects/PROJECT_ID/locations/REGION/datasets/DATASET_ID/fhirStores/FHIR_STORE_ID?updateMask=labels" | Select-Object -Expand Content

If the request is successful, the server returns a 200 OK HTTP status code and the response in JSON format:

200 OK
{
  "name": "projects/PROJECT_ID/locations/REGION/datasets/DATASET_ID/fhirStores/FHIR_STORE_ID",
  "labels": {
    "KEY_1": "VALUE_1",
    "KEY_2": "VALUE_2"
  }
}

Listing and filtering by labels

After you add a label to a Cloud Healthcare API resource, you can list resources and filter them by their labels. For example, after adding a label to a FHIR store in the previous samples, you can list the FHIR stores in your dataset and filter by the labels you added.

HL7v2 messages have additional filtering options that you can view in projects.locations.datasets.hl7V2Stores.messages.list.

curl command

To view the FHIR stores in a dataset and filter them by a label, make a GET request and provide the following information:

  • The name of the parent dataset
  • The name of the FHIR store
  • A query string containing the information to filter by
  • An access token

The following sample shows a GET request using curl.

curl -X GET \
    -H "Authorization: Bearer "$(gcloud auth print-access-token) \
    "https://healthcare.googleapis.com/v1beta1/projects/PROJECT_ID/locations/REGION/datasets/DATASET_ID/fhirStores?filter=labels.KEY=VALUE"

If the request is successful, the server returns a 200 OK HTTP status code and the response in JSON format:

200 OK
{
  "fhirStores": [
    {
      "name": "projects/PROJECT_ID/locations/REGION/datasets/DATASET_ID/fhirStores/FHIR_STORE_ID",
      "labels": {
        "KEY": "VALUE"
      }
    },
    {
      ...
    }
  ]
}

PowerShell

To view the FHIR stores in a dataset and filter them by a label, make a GET request and provide the following information:

  • The name of the parent dataset
  • The name of the FHIR store
  • A query string containing the information to filter by
  • An access token

The following sample shows a GET request using Windows PowerShell.

$cred = gcloud auth print-access-token
$headers = @{ Authorization = "Bearer $cred" }

Invoke-WebRequest `
  -Method Get `
  -Headers $headers `
  -Uri "https://healthcare.googleapis.com/v1beta1/projects/PROJECT_ID/locations/REGION/datasets/DATASET_ID/fhirStores?filter=labels.KEY=VALUE" | Select-Object -Expand Content

If the request is successful, the server returns a 200 OK HTTP status code and the response in JSON format:

200 OK
{
  "fhirStores": [
    {
      "name": "projects/PROJECT_ID/locations/REGION/datasets/DATASET_ID/fhirStores/FHIR_STORE_ID",
      "labels": {
        "KEY": "VALUE"
      }
    },
    {
      ...
    }
  ]
}

Removing a label

You can remove a label in one of two ways:

  • To remove the label entirely, meaning that both the key and the value are removed, use the read-modify-write pattern by completing the following steps:

    1. Read the current labels by calling the resource's get() method.
    2. Edit the returned labels, either by using a text editor or programmatically, to add or remove any applicable keys and their values.
    3. Write the updated labels by calling the resource's patch() method.
  • To keep the key and remove the value, set the value to null.

curl command

The following sample shows how to remove a label by setting the value of the label to null.

To remove a label from an existing FHIR store, make a PATCH request and specify the following information:

  • The name of the parent dataset
  • The name of the FHIR store
  • The label data to update
  • An update mask set to labels
  • An access token

The following sample shows a PATCH request using curl.

curl -X PATCH \
    -H "Authorization: Bearer "$(gcloud auth print-access-token) \
    -H "Content-Type: application/json; charset=utf-8" \
    --data "{
      'labels': {
        'KEY' : null
      }
     }" "https://healthcare.googleapis.com/v1beta1/projects/PROJECT_ID/locations/REGION/datasets/DATASET_ID/fhirStores/FHIR_STORE_ID?updateMask=labels"

If the request is successful, the server returns a 200 OK HTTP status code and the response in JSON format:

200 OK
{
  "name": "projects/PROJECT_ID/locations/REGION/datasets/DATASET_ID/fhirStores/FHIR_STORE_ID",
  "labels": {
    "KEY":
  }
}

PowerShell

The following sample shows how to remove a label by setting the value of the label to null.

To remove a label from an existing FHIR store, make a PATCH request and specify the following information:

  • The name of the parent dataset
  • The name of the FHIR store
  • The label data to update
  • An update mask set to labels
  • An access token

The following sample shows a PATCH request using Windows PowerShell.

$cred = gcloud auth print-access-token
$headers = @{ Authorization = "Bearer $cred" }

Invoke-WebRequest `
  -Method Post `
  -Headers $headers `
  -ContentType: "application/json; charset=utf-8" `
  -Body "{
      'labels': {
        'KEY': nullresource_manager_api
      }
  }" `
  -Uri "https://healthcare.googleapis.com/v1beta1/projects/PROJECT_ID/locations/REGION/datasets/DATASET_ID/fhirStores/FHIR_STORE_ID?updateMask=labels" | Select-Object -Expand Content

If the request is successful, the server returns a 200 OK HTTP status code and the response in JSON format:

200 OK
{
  "name": "projects/PROJECT_ID/locations/REGION/datasets/DATASET_ID/fhirStores/FHIR_STORE_ID",
  "labels": {
    "KEY":
  }
}

What's next

Read about other uses for labels with the Resource Manager API.

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