Hello JB,
thank you for the prompt reply!
You can to install the jahia-clustering feature only if
org.jahia.cluster "property" is activated, right ?
Yes, that's right (like a feature-switch or enabler).
I've corrected the syntax for the requirement and it is taken into
consideration on the first installation of the feature.
I guess, my approach in having a feature dynamically be stopped or started
based on a value of a property is just a wrong direction :-)
Right now I am having a working solution where I am just having a feature
in the featuresBoot, as:
featuresBoot = \
(bundle, \
config, \
deployer, \
...
system, \
wrap), \
jahia-core, \
jahia-jax-rs, \
${jahia.karaf.featuresBoot.extra}
And "jahia.karaf.featuresBoot.extra" system property is dynamically set by
me (either to an empty string to to a "jahia-clustering").
For dynamically stopping/starting a feature on the property changes, I
will do it manually in my code. Seems the right approach.
Thank you once again
Kind regards
Sergiy
On Fri, 29 Jan 2016 17:35:12 +0100, Jean-Baptiste Onofré <[email protected]>
wrote:
Hi Sergiy
You can to install the jahia-clustering feature only if
org.jahia.cluster "property" is activated, right ?
Did you try:
<requirement>org.jahia.cluster;filter:=("activated=true")</requirement>
(you don't need & in the LDIF syntax as you have only one test)
and check if feature:requirement-list ?
Thanks,
Regards
JB
On 01/29/2016 05:22 PM, Sergiy Shyrkov wrote:
Hello,
I would need some help/advice on the following use case, please (I am
new to Karaf).
I would like to automatically have a feature be started, depending on
the availability of a system capability.
But I am not quite sure, I am taking a right approach.
My feature, is related to clustering in our product and should be
activated or not, based on a Java system property.
For now, I came up with the following system capability (which is
working so far):
org.osgi.framework.system.capabilities= \
...
${jahia-cluster-activated-${cluster.activated}}
jahia-cluster-activated-false = org.jahia.cluster; activated="false"
jahia-cluster-activated-true = org.jahia.cluster; activated="true"
And my feature is defined as follows (removing the unrelated stuff):
<feature name="jahia-clustering" version="${project.version}">
<feature>cellar</feature>
<requirement>org.jahia.cluster;filter:="(&(activated=true))"</requirement>
</feature>
And here where I am stuck :-)
If I add my feature to the boot feature list (featuresBoot in
org.apache.karaf.features.cfg) I am getting a failure on Karaf startup
in case my system property cluster.activate=false:
2016-01-29 17:20:08,894 | ERROR | pool-21-thread-1 |
BootFeaturesInstaller | 9 - org.apache.karaf.features.core -
4.0.4 | Error installing boot features
org.osgi.service.resolver.ResolutionException: Unable to resolve root:
missing requirement [root] osgi.identity;
osgi.identity=jahia-clustering; type=karaf.feature;
version="[7.2.0.0-SNAPSHOT,7.2.0.0-SNAPSHOT]";
filter:="(&(osgi.identity=jahia-clustering)(type=karaf.feature)(version>=7.2.0.0-SNAPSHOT)(version<=7.2.0.0-SNAPSHOT))"
[caused by: Unable to resolve jahia-clustering/7.2.0.0-SNAPSHOT: missing
requirement [jahia-clustering/7.2.0.0-SNAPSHOT] org.jahia.cluster;
filter:="(&(activated=true))"]
at
org.apache.felix.resolver.ResolutionError.toException(ResolutionError.java:42)
And that prevents Karaf from starting.
I have a feeling that I am using not the right solution for my use case
and would really appreciate any inputs / hints.
Thanks in advance
Kind regards
Sergiy
--
Sergiy Shyrkov
Software Architect
jahia.com
