File Install Circular Configuration Update Loop
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Key: FELIX-2698
URL: https://issues.apache.org/jira/browse/FELIX-2698
Project: Felix
Issue Type: Bug
Components: File Install
Affects Versions: fileinstall-3.1.0
Reporter: David Hay
Using FileInstall 3.1.0, when I update a .cfg file, the system is sent into an
infinite loop of updating the Configuration Admin Service and rewriting the cfg
file. The cycle goes something like this:
1. Updated .cfg file is noticed by File Install DirectoryWatcher
2. The Configuration object is obtained and updated (in
ConfigInstaller.setConfig(File))
3. The Configuration Admin Service fires a ConfigurationEvent
4. ConfigInstaller receives the ConfigurationEvent and writes out the new
properties to the .cfg
5. Go to step 1
It seems like the ConfigInstaller object should figure out if the
ConfigurationEvent is in response to an update to the .cfg file it just loaded.
One way to do this might be to put a "special" value in the Configuration that
the ConfigurationListener method could look for.
Another way would be to compare the configuration in the .cfg file to the
properties that would normally be written. If they're the same, don't write
the file.
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