Design and Evaluation of an Extensible Web & Telephony Server based on the J-Kernel

Authors:
Daniel Spoonhower;Grzegorz Czajkowski;Chris Hawblitzel;Chi Chang;Deyu Hu;Thorsten von Eicken
Affiliations:
-;-;-;-;-;-
Venue:
Design and Evaluation of an Extensible Web & Telephony Server based on the J-Kernel
Year:
1998

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Abstract

This paper describes the design and performance of the J-Server, an integrated web and telephony server that allows untrusted Java servlets to be dynamically uploaded to extend the server''s functionality. The J-Kernel provides for protection and communication between J-Server servlets, and ensures that servlets can be cleanly terminated. A resource monitor called JRes is used to account for servlet resource usage. Two sample applications show that the overhead of J-Kernel task boundary crossings is small compared to the applications'' overall running time. Experience developing applications for the J-Server demonstrates the benefits of extensible systems based on safe language protection, and the flexibility of the servlet model.