If I develop a Smart Service plugin, I can pass in a javax.naming.Context object

guozhangy over 10 years ago

If I develop a Smart Service plugin, I can pass in a javax.naming.Context object using Constructor, the Context object can be used to lookup the data source connection.

But when I develop Function plugins, can I also pass the Context object in Constructor? It's not mentioned in the document. Do anyone have experience to access the database inside Function plugins? The reason is we want to create a Function to access a BLOB column (The BLOB column is not supported by CDT)

Thanks.

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0 Eduardo Fuentes
Appian Employee
over 10 years ago

There's an example in this plug-in forum.appian.com/.../summary The source code is inside the JAR and it's called ExecuteQuery.java

I would be really cautious with this, not sure what you are going to do with the retrieved data but if you're going to create a document in Appian with it you better use the RDBMS Blob Utility plug-in forum.appian.com/.../summary
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0 venkats533 over 10 years ago

ServiceContext should be first argument in the constructor. Yes, if required JDBC connection can be invoked from plug-in code. Try to minimize or avoid JDBC connections as you loose flexibility and increases maintenance in terms of configuration.
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0 venkateswarai917 over 10 years ago

If we want to use the database connections, Better to use the JNDO Lookup.. this is the best practice..
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0 guozhangy over 10 years ago

Thanks all.

We want to have a link in the SAIL form, the link should download file from database and present to the user, while RDBMS Blob Utility can only be used in a Process Modal.
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0 venkats533 over 10 years ago

Then you better develop a function plugin which will create the document from BLOB and return a document id. Then a download link can be given in the SAIL script
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