The basic use case is as follows:
API Provider
- Will publish APIs from Axway API Manager into the Amplify Unified Catalog via the agents. Those APIs will require manual approval of subscription requests from consumers.
- Is notified in Microsoft Teams when there is a new subscription requests, and will approve or reject the request.
API Consumer
- Discovers the API in the Unified Catalog and request access by subscribing.
- On approval, a subscription key will be created in Axway API Manager by the agent and the keys will be sent to the API Consumer's email. After the key has been sent, the state of the Subscription in Unified Catalog gets updated by the agent to Active and the Consumer can now use the API with the keys that were received over email.
- Can cancel the subscription from the Unified Catalog. When cancelled, the subscription in Axway API Manager will be removed and the state of the Unified Catalog subscription will be updated to unsubscribed, indicating the consumer will no longer be able to use the API.
The technologies that were used for this project:
- API Manager agents to discover the APIs and publish them to Unified Amplify Unified Catalog
- Amplify Unified Catalog as the central place to publish and discover the APIs.
- Microsoft Teams for notifications and approval or rejection of subscription requests.
Follow the steps below to use this example:
Documentation available here
The Service Account can be created using the Platform UI or the Axway CLI
More details on how to achieve this are also presented in this blog post.
After creating the Service Account, save the clientId and clientSecret.
Amplify Central Unified Catalog has the option to configure Webhooks that can be invoked when Consumers of Catalog asset update their subscriptions. This flow will send notifications to MS teams channel as an Active card when a consumer subscribes to the API from the Unified Catalog. The API provider can then approve or reject the subscription requests from within the MS Active card.
The MS flow will also post notifications in the channel for any subscription updates.
Pre-requisite:
- You'll need Microsoft Flow, with a Free Trial account at a minimum to be able to create the flow.
To configure the flow:
1. Navigate to Microsoft Flow.
- Go to "My flows".
- Create an
Instant flow, provide anameand selectWhen an HTTP request is receivedas an entry point. - In the request json body schema, copy and paste the Subscription Updated Event schema below:
{
"type": "object",
"properties": {
"id": {
"type": "string"
},
"time": {
"type": "string"
},
"version": {
"type": "string"
},
"product": {
"type": "string"
},
"correlationId": {
"type": "string"
},
"organization": {
"type": "object",
"properties": {
"id": {
"type": "string"
}
}
},
"type": {
"type": "string"
},
"payload": {
"type": "object",
"properties": {
"consumerInstance": {
"type": "object",
"properties": {
"kind": {
"type": "string"
},
"name": {
"type": "string"
},
"tags": {
"type": "array",
"items": {
"type": "string"
}
},
"group": {
"type": "string"
},
"metadata": {
"type": "object",
"properties": {
"id": {
"type": "string"
},
"audit": {
"type": "object",
"properties": {
"createUserId": {
"type": "string"
},
"modifyUserId": {
"type": "string"
},
"createTimestamp": {
"type": "string"
},
"modifyTimestamp": {
"type": "string"
}
}
},
"scope": {
"type": "object",
"properties": {
"id": {
"type": "string"
},
"kind": {
"type": "string"
},
"name": {
"type": "string"
}
}
},
"references": {
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string"
},
"kind": {
"type": "string"
},
"name": {
"type": "string"
},
"type": {
"type": "string"
}
},
"required": [
"id",
"kind",
"name",
"type"
]
}
},
"resourceVersion": {
"type": "string"
}
}
},
"apiVersion": {
"type": "string"
},
"attributes": {
"type": "object",
"properties": {
"release": {
"type": "string"
}
}
}
}
},
"subscription": {
"type": "object",
"properties": {
"id": {
"type": "string"
},
"name": {
"type": "string"
},
"userId": {
"type": "string"
},
"properties": {
"type": "object",
"additionalProperties": true
},
"metadata": {
"type": "object",
"properties": {
"createUserId": {
"type": "string"
}
}
},
"currentState": {
"type": "string"
},
"owningTeamId": {
"type": "string"
},
"relationships": {
"type": "array",
"items": {
"type": "object",
"properties": {
"key": {
"type": "string"
},
"path": {
"type": "string"
},
"spec": {
"type": "string"
},
"type": {
"type": "string"
},
"value": {
"type": "string"
}
},
"required": [
"key",
"path",
"spec",
"type",
"value"
]
}
},
"nextPossibleStates": {
"type": "array"
},
"currentStateDescription": {
"type": "string"
}
}
},
"catalogItem": {
"type": "object",
"properties": {
"id": {
"type": "string"
},
"name": {
"type": "string"
},
"owningTeamId": {
"type": "string"
},
"relationships": {
"type": "array",
"items": {
"type": "object",
"properties": {
"key": {
"type": "string"
},
"path": {
"type": "string"
},
"spec": {
"type": "string"
},
"type": {
"type": "string"
},
"value": {
"type": "string"
}
},
"required": [
"key",
"path",
"spec",
"type",
"value"
]
}
}
}
}
}
}
}
}
- Set the the value for the
Condition, by searchingcurrentStateusing theAdd dynamic content. - Set the operator to
is equal toand value set toREQUESTED.
4. Set up the Adaptive card. The subscription requests will be Approved or Rejected based on the response of the action in the Adaptive Card.
- On the
If yesbranch, selectAdd a new actionof typePost an Adaptive Card to a Teams channel and wait for the response. - Configure the
Teamand theChannelwhere the card would be posted. - Copy-paste the text below in
Messagebox:
{
"$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
"type": "AdaptiveCard",
"version": "1.0",
"body": [
{
"type": "Container",
"items": [
{
"type": "TextBlock",
"text": "Subscription requested",
"weight": "Bolder",
"size": "Medium"
},
{
"type":"Image",
"url":"https://blog.axway.com/wp-content/uploads/2015/03/Screenshot1.pngaxway.png",
"spacing": "Small",
"horizontalAlignment": "Center",
"height": "stretch",
"size": "Medium"
}
]
},
{
"type": "Container",
"style": "accent",
"items": [
{
"type": "FactSet",
"facts": [
{
"title": "Catalog Item",
"value": "@{triggerBody()?['payload']?['catalogItem']?['name']}"
},
{
"title": "Subscription",
"value": "@{triggerBody()?['payload']?['subscription']?['name']}"
},
{
"title": "Message",
"value": "@{triggerBody()?['payload']?['subscription']?['currentStateDescription']}"
}
]
}
]
},
{
"type": "TextBlock",
"text": "Select your action:",
"weight": "Bolder",
"wrap": true
},
{
"type": "Input.ChoiceSet",
"placeholder": "Enter your action",
"id": "action",
"choices": [
{
"title": "Approve",
"value": "approved"
},
{
"title": "Reject",
"value": "rejected"
}
],
"style": "expanded"
}
],
"actions": [
{
"type": "Action.ShowCard",
"title": "Submit",
"card": {
"type": "AdaptiveCard",
"body": [
{
"type": "Input.Text",
"id": "comment",
"isMultiline": true,
"placeholder": "Enter your comment"
}
],
"actions": [
{
"type": "Action.Submit",
"title": "OK"
}
],
"$schema": "http://adaptivecards.io/schemas/adaptive-card.json"
}
},
{
"type": "Action.OpenUrl",
"title": "Team details",
"url": "https://apicentral.axway.com/access/teams/detail/@{triggerBody()?['payload']?['subscription']?['owningTeamId']}"
},
{
"type": "Action.OpenUrl",
"title": "User details",
"url": "https://platform.axway.com/#/user/@{triggerBody()?['payload']?['subscription']?['metadata']?['createUserId']}"
},
{
"type": "Action.OpenUrl",
"title": "View Subscription in Unified Catalog",
"url": "https://apicentral.axway.com/catalog/@{triggerBody()?['payload']?['catalogItem']?['id']}/subscriptions/@{triggerBody()?['payload']?['subscription']?['id']}"
}
],
"minHeight": "100px"
}- Set the
Update Messageto:
Subscription "@{triggerBody()?['payload']?['subscription']?['name']}" processed for "@{triggerBody()?['payload']?['catalogItem']?['name']}"
- Set the
Should update cardtoyes.
For easier access to the Adaptive card data, rename it to card. On the top right corner of the card, click the ellipsis (...), then pick Rename to card.
Add an action of type HTTP to configure doing REST API Calls to Amplify Central.
- Set
MethodtoPOST - Set
URItohttps://login.axway.com/auth/realms/Broker/protocol/openid-connect/token - Add a
Headerwith keyContent-Typeand valueapplication/x-www-form-urlencoded - Set the
Bodytogrant_type=client_credentials - Click on
Show advanced optionsand setAuthenticationtoBasic. For username, set the value of the clientId For password, set the value of the clientSecret - Rename the action to GetToken
Click on the On input and on the Add dynamic content link. Select Status code from the GetToken action.
Click on the ellipsis (...) of the Switch action and select Configure run after.
Pick all options beside is skipped: 
On the right side, for the Default behaviour, is where we will treat the error.
For this, we will just fail the formula execution, but it can be configured to post back to the channel to inform the
user that its operation could not be executed or/and to also inform the team that manages the flow that it failed executing.
We'll pick a Control Terminate action.
Configure it to set the Status as Failed and the Message as Could not get Platform token. Http call failed with code: @{outputs('GetToken')['statusCode']}
On the left side Case on the Equals input set the value of 200.
Next we need to check if the Subscription still exists (as it might have been updated until the Card has been actioned in MS Teams).
Add an action of type HTTP
- Set
MethodtoGET - Set
URItohttps://apicentral.axway.com/api/unifiedCatalog/v1/catalogItems/@{triggerBody()?['payload']?['catalogItem']?['id']}/subscriptions/@{triggerBody()?['payload']?['subscription']?['id']} - Add a
Headerwith keyContent-Typeand valueapplication/jsonand another one withAcceptkey and valueapplication/json - Click on
Show advanced optionsand setAuthenticationtoRawand for valueBearer @{body('GetToken')?['access_token']} - Rename the action to CheckSubscription
7. Now similar to GetToken, we need to take care of the errors. So we'll add a new action of type Switch
For On value, we pick the status code for the CheckSubscription step.
Update the switch step so it runs for errors in the CheckSubscription spec.
We now have to check if the catalog item or subscriptions are not present in Amplify Central, so we check if the call return 404. On the 404, we will send an update to the same teams channel that the data is not there anymore.
Create a Post a message as the Flow bot to a channel and set the message to:
Subscription "@{triggerBody()?['payload']?['subscription']?['name']}" for catalog item "@{triggerBody()?['payload']?['catalogItem']?['name']}" does not exist anymore.
On the Default case we will fail the execution as in the previous step.
Message: Subscription "@{triggerBody()?['payload']?['subscription']?['name']}" for catalog item "@{triggerBody()?['payload']?['catalogItem']?['name']}" does not exist anymore.
On the 200 branch for the last Switch, we will try to update the subscription to the new state: APPROVED or REJECTED.
Create an HTTP action with:
- Set
MethodtoPOST - Set
URItohttps://apicentral.axway.com/api/unifiedCatalog/v1/catalogItems/@{triggerBody()?['payload']?['catalogItem']?['id']}/subscriptions/@{triggerBody()?['payload']?['subscription']?['id']}/states - Add a
Headerwith keyContent-Typeand valueapplication/jsonand another one withAcceptkey and valueapplication/json - Add a body with:
{ "state": "@{if(equals(body('card').data.action,'approved'), 'APPROVED','REJECTED')}", "description": "@{body('card')?['data']?['comment']}" } - Click on
Show advanced optionsand setAuthenticationtoRawand for valueBearer @{body('GetToken')?['access_token']}
Add a action of type Switch to check the response and handle the errors (set it to run for after HTTP post Errors as well).
For 201, we send back a teams channel notification that the operation was executed.
Create a Post a message as the Flow bot to a channel action with message: Subscription "@{triggerBody()?['payload']?['subscription']?['name']}" for catalog item "@{triggerBody()?['payload']?['catalogItem']?['name']}" was "@{if(equals(body('card').data.action,'approved'), 'APPROVED','REJECTED')}"
For 400, we notify that the subscription state has been changed from REQUESTED since the card was posted.
Create a Post a message as the Flow bot to a channel action with message that includes the current state of the subscription:
Subscription "@{triggerBody()?['payload']?['subscription']?['name']}" for catalog item "@{triggerBody()?['payload']?['catalogItem']?['name']}" was not "@{if(equals(body('card').data.action,'approved'), 'APPROVED','REJECTED')}" as it was already in @{body('CheckSubscription')?['state']} state
For Default Switch branch, we will add a Terminate action with Subscription "@{triggerBody()?['payload']?['subscription']?['name']}" state for catalog item "@{triggerBody()?['payload']?['catalogItem']?['name']}" was not updated. Received status code @{outputs('HTTP')['statusCode']}"
Combining the above cases, the update subscription switch should have those conditions now:
If the provider also wants to track subscription state changes in its Microsoft Teams channel, then on the If no
branch on the main top Condition added in step 3, an extra action can be added.
Top if no branch:
Add a new action as Post a message as a Flow bot to a channel with Message set to Subscription ["@{triggerBody()?['payload']?['subscription']?['name']}"](https://apicentral.axway.com/catalog/@{triggerBody()?['payload']?['catalogItem']?['id']}/subscriptions/@{triggerBody()?['payload']?['subscription']?['id']}) for catalog item ["@{triggerBody()?['payload']?['catalogItem']?['name']}"](https://apicentral.axway.com/catalog/@{triggerBody()?['payload']?['catalogItem']?['id']}) state changed to @{triggerBody()?['payload']?['subscription']?['currentState']}
Now provides will get all the subscriptions state changes updates besides of REQUESTED for which they will receive the Adaptive card.
Configure the API Manager agent subscriptions approval webhook as specified in the docs.
Set CENTRAL_SUBSCRIPTIONS_APPROVAL_MODE to manual
Set CENTRAL_SUBSCRIPTIONS_APPROVAL_WEBHOOK_HEADERS to Header=contentType,Value=application/json
Copy the HTTP POST URL from the initial MS flow step:
Example:
https://prod-19.westeurope.logic.azure.com:443/workflows/7dec70fd23a44bc8ad6d7b14e5ea78ec/triggers/manual/paths/invoke?api-version=2016-06-01&sp=%2Ftriggers%2Fmanual%2Frun&sv=1.0&sig=N8eW1VYHzhGiMB9l4_AohLui0kG1C4JTKR6Zc2kZeFs
Set CENTRAL_SUBSCRIPTIONS_APPROVAL_WEBHOOK_URL to the copied value.
Restart the agent.