When creating a new flow, if you know the circumstances under which you want the flow to activate, select Start with a trigger and select an available trigger that will activate the flow.
If an app has multiple triggers that require a port to be specified, for example REST and/or GraphQL triggers, make sure that the port number is unique for for each trigger. Two triggers in the same app cannot run on the same port.
If you are unsure of the circumstances under which the flow should be activated or if you want the flow to be activated under more than one situation, use the Configure flow inputs and outputs and attach the flow to the trigger(s) at a later time as needed. See Creating a Flow without a Trigger for more details on this.
Refer to the following sections for more details:
Creating a Flow Attached to a REST Trigger Ceating a Flow Attached to a GraphQL Trigger Creating a Flow Attached to the gRPC Trigger Creating a Flow Attached to Other Triggers
Creating a Flow Attached to a REST (Receive HTTP Message) Trigger
When creating a flow with a REST trigger, you have the option to either enter the schema in the Configure trigger dialog during flow creation or you can use a Swagger specification file that you have saved either in TIBCO Cloud™ Integration - API Modeler or on your local machine.
If you want to use a Swagger specification file, refer to the Using a Swagger Specification section for details.
If you would like to have two flows using the same operation on the same resource, make sure that you configure different ports for each flow while creating the flows in the Settings tab of the
ReceiveHTTPMessage trigger.
You can create a REST flow by entering a JSON schema or dragging and dropping a Swagger JSON file.
See Using a Swagger Specification section for how to use a Swagger file.
To create a REST flow by entering the schema, do the following:
Procedure
1. Click an app name on the Apps page in Flogo Enterprise to open its page.
2. Click Create.
The Add triggers and flows dialog opens.
3. Enter a name for the flow in the Name text box.
Flow names within an app must be unique. An app cannot contain two flows with the same name.
4. Optionally, enter a brief description of what the flow does in the Description text box.
5. New flow is selected by default. Click Create.
6. Select Start with a trigger.
The triggers catalog opens with all the available triggers showing.
7. Click Receive HTTP Message card to create a REST trigger.
The trigger configuration dialog opens.
8. Select the REST operation under Method that you want to implement by clicking it .
A flow can have multiple REST triggers. Two REST triggers cannot have an identical port, path, and method combination. Each REST trigger needs to differ from the other REST triggers for the same flow with either a unique port, path, or operation (GET, PUT, POST, DELETE).
9. Enter a resource path in the Resource Path text box.
10. Enter the JSON schema or JSON sample data for the operation in the Enter a JSON Schema or an example of your JSON message. This will be the schema for both input and output.
11. Click Continue.
12. Select one of the following dialog:
If you select Copy Schema, the schema that you entered in this step above automatically gets copied or displayed in a tree format to the following locations when the trigger gets added:
● Trigger output in the Map to Flow Inputs tab of the trigger
● Flow input in the Input Settings tab of the Flow Inputs & Outputs accordian tab.
● Trigger reply (If the trigger has a reply) in the Reply Settings of the trigger.
Refer to the "REST Trigger" section in the TIBCO Flogo® Activities and Triggers Guide for details on configuration parameters.
If you select Just add the trigger, a REST trigger gets added to the flow without any configuration.
You can configure this REST trigger by clicking on the trigger from the app details page at a later time. Any changes made to the trigger must be explicitly saved by clicking Save.
The flow page opens.
13. Map the trigger output to the flow input.
a) Open the trigger configuration dialog by clicking on the trigger.
b) Open the Map to Flow Inputs tab.
c) Map the elements under Flow input to their corresponding elements under Trigger Output one at a time.
14. Map the flow output to the trigger reply as follows:
a) In the trigger configuration dialog, click the Map from Flow Outputs tab.
b) Map the elements under Trigger Reply to their corresponding elements under Flow Output.
c) Close the dialog by clicking on the x at its top right corner.
15. Click Save to save your changes.
16. Add activites to the flow by hovering your mouse cursor next to the Flow Inputs & Outputs tab and clicking the plus sign.
Creating a Flow attached to the GraphQL Trigger
You create GraphQL flows by uploading a GraphQL schema file with an extension, .gql or .graphql. Flogo Enterprise creates the appropriate flows based on your schema. When the flow gets created, a GraphQL trigger automatically gets generated and attched to each flow that gets created.
Refer to the section, Using GraphQL Schema on how to create a flow using a GraphQL schema. Also, refer to the "GraphQL Trigger" section in the TIBCO Flogo® Activities and Triggers Guide for details on the GraphQL trigger.
Creating a Flow Attached to Other Triggers
This section applies to triggers that are not REST, gRPC or GraphQL triggers.
To create a flow with such a trigger, follow these steps:
Procedure
1. Click an app name in the Apps page in Flogo Enterprise to open its page.
2. Click the Create link if this is the first flow in the app or the Create button if another flow already exists in the app.
The Add triggers and flows dialog opens.
3. Enter a name for the flow in the Name text box.
Flow names within an app must be unique. An app cannot contain two flows with the same name.
4. Optionally, enter a brief description of what the flow does in the Description text box and click Create.
5. Select Start with a trigger.
The triggers catalog opens. If there are existing triggers in the app, they are displayed in the Select Existing tab.
6. To create a new trigger, click Select New.
7. Click the trigger that you want to add.
The flow details page is displayed with the trigger.
8. Click the trigger to display its properties. For example, the image below shows the Timer trigger.
9. Configure the trigger properties for the trigger. See the respective trigger section in the TIBCO Flogo® Activities and Triggers Guide for details.
10. Add activities to the flow by clicking the + icon next to the Flow Inputs & Outputs tab.
Creating a Flow Attached to a gRPC Trigger
You create gRPC flows by uploading a gRPC Protobuf file with an extension, .proto. Flogo Enterprise creates the appropriate flows based on your methods. It implements one flow per method. A gRPC trigger automatically gets generated and the flows are attached to the trigger.
See Using gRPC for information on how to create a flow using a gRPC Protobuf. Also, refer to the
"gRPC Trigger" section in the TIBCO Flogo® Activities and Triggers Guide for details on the gRPC trigger.