• Create new node.js function
• Arguments and parameters
• Sample function
• Call a node.js function
• Get value
• Points to remember
  

To create a new node.js function:

1. Click on  Workflows  to navigate to your  Workflow Dashboard .
   

   

2. Click  Functions  tab.
   

   

3. Click  New Function  button.
   

   

4. The create page will appear.
   

   

5. Enter  Function Name . This serves as the identifier using which the function can be invoked. Specify a meaningful name for the function without any empty spaces.
   

   

6. Select  Node.js  as Language for scripting the function.
   

   

7. Specify the  Arguments .
8. Click  Create Function  button. The builder will appear.
9. Now, Add required node.js code to the function.
   

   

10. The function will get listed under  Functions  in the workflow dashboard.

Similar to deluge function, node.js also requires you to specify arguments based on which your function runs. An argument is the instance that is passed to the method on running a function. At the event of creating a node.js function, you can specify an argument. If you have the necessity to add more arguments to the same function at a later stage, you can access the  Function Properties  in the builder (click the  Settings  icon).

To run a program, you need to define parameters in node.js functions. A parameter is the variable assigned for the value of an argument. It serves as the container in which the argument value passed from deluge is received in a node.js function.

This function is created to calculate average in node.js function and uses the values obtained to update records using deluge.

• config.json is a configuration file.
• node_modules is the folder to which you can upload your node.js files. Right click on the folder to upload files.

To call a node.js function in a deluge script, you need to use the statement indicated in the image below. In this example, “thisapp.calculatorFunction(total,count);” refers to the node.js function, which contains the value as a collection.

The basicIO.write statement is used to print the result following calculation. The result obtained thus can be used in a deluge function for further processing.

• .js files can only be uploaded to the node_modules.
• The file upload limit of all the files put together is 10 MB.
• The size of your request and response payload can only be up to 1 MB each.
• The file size in the editor can only be up to 1 MB.
• You can pass a maximum of 20 arguments to node.js functions.
• You can call a function 5 times in one deluge script.
• You need to receive a response within 40 seconds from the start of a function call, beyond which the execution will fail.
• Following are the supported default node-modules:
  
  • Request-promise
  • bluebird
  • crypto
  • axiom
  • other default node packages (request, fs, url, etc.)
• Currently this feature is not supported in DS files. The cloud functions will not be captured during import/export/backup/duplicate actions. Instead it will be substituted with an empty deluge function of same name to avoid errors.
• console.log  statement will not work in creator cloud functions
  

• Understand functions
  
• Create and manage deluge functions
• Create and manage java functions