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How to configure Jetty's temporary directories?

Jetty itself has no temporary directories, but each web application can be assigned a directory into which the war is unpacked, JSPs compiled on-the-fly etc.

The algorithm for determining a webapp's temporary directory location is as follows:

  1. Try to use an explicit directory specifically for this webapp:
    • Iff webapp.getTempDirectory() is set, use it. Do NOT delete it on jvm exit.
    • Iff javax.servlet.context.tempdir context attribute is set for this webapp && exists && writeable, then use it. Do NOT delete on jvm exit.
  2. Create a directory based on global settings. The new directory will be called "Jetty_"host""port""context""+virtualhost :
    • Iff $(jetty.home)/work exists create the directory there. Do NOT delete on jvm exit. Do NOT delete contents if dir already exists.
    • Iff WEB-INF/work exists create the directory there. Do NOT delete on jvm exit. Do NOT delete contents if dir already exists.
    • Else create dir in $(java.io.tmpdir). Set delete on jvm exit. Delete contents if dir already exists.

It is important to note that a temporary directory will have its contents deleted when the webapp is stopped unless either:

  • it is called "work"
  • it pre-existed the deployment of the webapp

Once a tempory directory has been allocated, a File instance for it is set as the javax.servlet.context.tempdir attribute of the web
application.

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Contact the core Jetty developers at www.webtide.com
private support for your internal/customer projects ... custom extensions and distributions ... versioned snapshots for indefinite support ... scalability guidance for your apps and Ajax/Comet projects ... development services from 1 day to full product delivery