Hello Matt,
On Oct 12, 2009, at 22:14 , Matt Tennant wrote:
It seems like there should be a simple solution to my problem.
Occasionally the device with our software (deployed within Felix
framework) is shut off when it is in the middle of restarting a
bundle. If this happens, then when everything is restarted that
bundle my be in an "installed", rather than "active", state.
I'm assuming you have a bundle that is responsible for updating other
bundles? That's what we usually call the "management agent".
We don't have any bundles installed that we don't want started
whenever the framework starts. But we do need to use the bundle
cache, so we can't wipe it out and start from scratch each time.
So, is there any way of telling Felix at startup that all installed
bundles should be started, even if they weren't running before? I
didn't see anything obvious at: http://felix.apache.org/site/apache-felix-framework-usage-documentation.html#ApacheFelixFrameworkUsageDocumentation-configuringframework
What about having this "management agent" bundle I mentioned above go
over bundles and start them if they were not started? If this bundle
already has knowledge about what to update and when, then it is
probably also the best place to make sure everything stays "active".
On a related note, especially if there is no solution to the above,
has anybody figured out a good way to issue framework commands from
outside the framework? For instance, if I have the external telnet
port set up (where framework prompt is available via telnet), then I
can issue framework commands via a script that connects over
telnet. But telnet isn't installed on the host device, so this only
works from a computer on the network. I'd be very interested in
another way of doing this that doesn't require a telnet program. If
I have to, I'll try writing a c program to communicate over tcp/ip
to the telnet port, but I'm hoping for a cleaner solution.
We have a bundle that allows you to telnet into a remote shell.
We also have a web console that you can use to remotely "manage" the
framework.
There also is a JMX based interface to (again remotely) connect and
manage bundles.
...and I might be forgetting one or two... ;)
So, problem 1) start Felix and force all installed bundles to start,
no matter where they left off. Problem 2) issue framework command
to a running Felix framework from the same host device.
<shameless-plug>
You might also want to take a look at Apache ACE, in incubation
currently, that is a system for remotely managing and updating OSGi
bundles and configuration data.
</shameless-plug>
Of course, there are other alternatives for that too, such as the
Apache Felix File Installer and Apache Felix Karaf subprojects found
here.
Greetings, Marcel
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