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Re: [equinox-dev] How do I dynamically install and attach a fragment?
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Tom and Simon,
I had been using resolveBundles() without
success. However your reference to adding constraints made me look more
closely at my code and I found that the fragment had dependencies that
I was not loading. It is working now.
Thanks
Matthew Webster
AOSD Project
Java Technology Centre, MP146
IBM Hursley Park, Winchester, SO21 2JN, England
Telephone: +44 196 2816139 (external) 246139 (internal)
Email: Matthew Webster/UK/IBM @ IBMGB, matthew_webster@xxxxxxxxxx
http://w3.hursley.ibm.com/~websterm/
Thomas Watson <tjwatson@xxxxxxxxxx>
Sent by: equinox-dev-bounces@xxxxxxxxxxx
03/01/2007 15:02
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Subject
| Re: [equinox-dev] How do I dynamically
install and attach a fragment? |
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Hi,
Simon is correct, you need to use either PackageAdmin.resolveBundles(...)
or PackageAdmin.refreshPackages(...) to force a fragment to resolve. When
launching from PDE, the update configurator bundle uses PackageAdmin to
force all possible bundles to resolve. When you install a bundle
yourself you must do something to force it to resolve. For fragment
bundles the only way to force them to resolve is to use PackageAdmin.
The two PackageAdmin methods (resolveBundles(...) and refreshPackages(...))
have different usecases.
- If you have a fragment which you would like to resolve and attach
to an existing host bundle which is already resolved then you must use
PackageAdmin.resolveBundles(...). This method will attempt to attach
a fragment to any available host bundles. If the host bundle is already
in the RESOLVED state then a fragment can only be attached dynamically
if it does not add any new constraints to the host.
- If you have a fragment which adds new constraints (i.e. new Import-Package
or Require-Bundle headers), then you must use PackageAdmin.refreshPackages
to force the host bundle to re-resolve. This is because we cannot
dynamically add new constraints to an already RESOLVED host bundle from
fragment bundles.
Tom
"Simon Kaegi"
<simon.kaegi@xxxxxxxxx>
Sent by: equinox-dev-bounces@xxxxxxxxxxx
12/29/2006 11:58 AM
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Subject
| Re: [equinox-dev] How do I dynamically
install and attach a fragment? |
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Hi Matthew,
What you're doing sounds right to me.
Is the fragment showing up as UNRESOLVED in the console?
If you installed the fragment first, you might need to use PackageAdmin.resolveBundles(...)
and possibly refreshPackages(...) to get everything set correctly.
-Simon
----- Original Message -----
From: Matthew
Webster
To: Equinox
development mailing list
Sent: Friday, December 29, 2006 6:32 AM
Subject: [equinox-dev] How do I dynamically install and attach a fragment?
I am trying to use BundleContext.installBundle() to install a fragment
and its host. However when I use Bundle.loadClass() (for the host) I cannot
resolve any classes in the fragment. If use PDE (JUnit Plug-in Test) it
works. I notice that in the failing case querying the fragments gives no
host and vice versa for the host. Is there an additional API I must call
to attach the fragment? Is the order in which I install the bundles important?
Thanks in advance.
Matthew Webster
AOSD Project
Java Technology Centre, MP146
IBM Hursley Park, Winchester, SO21 2JN, England
Telephone: +44 196 2816139 (external) 246139 (internal)
Email: Matthew Webster/UK/IBM @ IBMGB, matthew_webster@xxxxxxxxxx
http://w3.hursley.ibm.com/~websterm/
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