# Example: Proxy

- ## The proxy interface is a modified Tcl-shell capable of communicating via pipes with AOLserver:

  - Processes are forked on demand and maintained in a pool
  - Pools are initialized with application-specific startup scripts, e.g., open a particular PLS database

- ## The proxy interface is used for several purposes:

  - Isolation of code which is not thread safe
  - Evaluation of code which fiddles with env, e.g., env(TZ)
  - A light wait process to fork background process (forking a 500meg AOLserver can be problematic)

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