Creating a Workflow Trigger
This section describes how to create a workflow trigger and orchestrate it in a workflow using the trigger URN.
Creating an SMN Trigger
Before creating an SMN trigger, apply for the SMN service and create a topic (for example, the graph-test topic) on the SMN console. For details, see Creating a Topic.
- Log in to the FunctionGraph console, and choose Workflows > Workflow Triggers.
- Click Create Trigger.
- In the Create Trigger dialog box, configure the trigger information, as shown in Table 1. The parameters with an asterisk (*) are mandatory.
Table 1 SMN workflow trigger information Parameter
Description
*Trigger Name
Name of the trigger, which can contain a maximum of 32 characters. Only letters, digits, and hyphens (-) are allowed.
Enter trigger_smn.
Description
Description of the trigger, which can contain a maximum of 256 characters.
In this example, leave the description blank.
*Event Source
Select SMN.
*Topic Name
Name of an SMN topic.
Select graph-test.
- Click OK.
A trigger URN is generated, for example, urn:fgs:southchina:b8c3784c7a464100aea6dc8fedc15911:trigger:SMN_test_trigger-smn8d1a4147-e45a-4923-41f5-6a2f3de8853e_1508227863.
Creating an OBS Trigger
Before creating an OBS trigger, apply for the OBS service and create a bucket (for example, the obs-cff bucket) on the OBS console. For details, see Creating a Bucket.
- Log in to the FunctionGraph console, and choose Workflows > Workflow Triggers.
- Click Create Trigger.
- In the Create Trigger dialog box, configure the trigger information, as shown in Table 2. The parameters with an asterisk (*) are mandatory.
Table 2 OBS workflow trigger information Parameter
Description
*Trigger Name
Name of the trigger, which can contain a maximum of 32 characters. Only letters, digits, and hyphens (-) are allowed.
Enter trigger_obs.
Description
Description of the trigger, which can contain a maximum of 256 characters.
In this example, leave the description blank.
*Event Source
Select OBS.
*Bucket
OBS bucket to be used as the event source.
Select obs-cff.
*Events
Events for triggering a workflow or a state of the workflow.
Select Put, Post, and Delete. When files are updated, uploaded, or deleted in the obs_cff bucket, the workflow or state is triggered.
Prefix
Keyword for limiting notifications to those about objects whose names start with the matching characters. This limit can be used to filter the names of OBS objects. In this example, leave this field blank.
Suffix
Keyword for limiting notifications to those about objects whose names end with the matching characters. This limit can be used to filter the names of OBS objects. In this example, leave this field blank.
- Click OK.
A trigger URN is generated, for example, urn:fgs:southchina:b8c3784c7a464100aea6dc8fedc15911:trigger:OBS_obs-cff_trigger-86504a09a43b-077d-4726-69f9-2a51b7cce384_1512031172.
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