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From Chetan Mehrotra <chetan.mehro...@gmail.com>
Subject Re: Running several instances of Felix
Date Wed, 19 Jun 2013 07:54:03 GMT
If you just want to share the bundles between various Felix instances
you can try specifying a different value for
'org.osgi.framework.storage' [1] for each launch command say by
passing in a system property. This would allow Felix to use different
dir for its caches and hence would avoid any potential issue related
to concurrent access.

[1] http://felix.apache.org/site/apache-felix-framework-bundle-cache.html

Chetan Mehrotra


On Wed, Jun 19, 2013 at 1:19 PM, Benoît Thiébault <thiebault@artenum.com> wrote:
> Multiple JVM (and separate processes).
>
> Le 19 juin 2013 à 09:47, Chetan Mehrotra a écrit :
>
>> Do you want to launch multiple jvm (seprate processes) of Felix or
>> within same process multiple Felix instances?
>>
>> Chetan Mehrotra
>>
>>
>> On Wed, Jun 19, 2013 at 1:12 PM, Benoît Thiébault <thiebault@artenum.com>
wrote:
>>> Hi everyone,
>>>
>>> We have developed a simulation software based on OSGi and using Felix.
>>>
>>> The execution of the application is done in a script that executes the following
command:
>>> java -jar -Dfelix.config.properties=file:./resources/felix/config.properties
./dependencies/thirdparty/felix-4.0.2/felix.jar
>>>
>>> We then have two folders containing all the OSGi bundles that are automatically
installed and started by felix when it is launched.
>>>
>>> This works very well.
>>>
>>> Users have however requested to be able to launch several instances of our software
(to run several simulations in parallel for instance). This however does not work and I think
felix has difficulties dealing with the cache folder when multiple instances are running in
parallel
>>>
>>> Our Felix config.properties file is in attachement.
>>>
>>> Does anyone know how to solve this problem?
>>>
>>> Kind regards,
>>>
>>> Ben
>>>
>>> # Licensed to the Apache Software Foundation (ASF) under one
>>> # or more contributor license agreements.  See the NOTICE file
>>> # distributed with this work for additional information
>>> # regarding copyright ownership.  The ASF licenses this file
>>> # to you under the Apache License, Version 2.0 (the
>>> # "License"); you may not use this file except in compliance
>>> # with the License.  You may obtain a copy of the License at
>>> #
>>> #   http://www.apache.org/licenses/LICENSE-2.0
>>> #
>>> # Unless required by applicable law or agreed to in writing,
>>> # software distributed under the License is distributed on an
>>> # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
>>> # KIND, either express or implied.  See the License for the
>>> # specific language governing permissions and limitations
>>> # under the License.
>>>
>>> #
>>> # Framework config properties.
>>> #
>>>
>>> # To override the packages the framework exports by default from the
>>> # class path, set this variable.
>>> #org.osgi.framework.system.packages=
>>>
>>> # To append packages to the default set of exported system packages,
>>> # set this value.
>>> #org.osgi.framework.system.packages.extra=
>>>
>>> # The following property makes specified packages from the class path
>>> # available to all bundles. You should avoid using this property.
>>> org.osgi.framework.bootdelegation=sun.awt.*, sun.sun.*, com.sun.org.*, com.sun.*,
sun.*, org.w3c.dom.traversal
>>> #sun.*, com.sun.*
>>>
>>> # Felix tries to guess when to implicitly boot delegate in certain
>>> # situations to ease integration without outside code. This feature
>>> # is enabled by default, uncomment the following line to disable it.
>>> #felix.bootdelegation.implicit=false
>>>
>>> # The following property explicitly specifies the location of the bundle
>>> # cache, which defaults to "felix-cache" in the current working directory.
>>> # If this value is not absolute, then the felix.cache.rootdir controls
>>> # how the absolute location is calculated. (See next property)
>>> #org.osgi.framework.storage=${felix.cache.rootdir}/felix-cache
>>>
>>> # The following property is used to convert a relative bundle cache
>>> # location into an absolute one by specifying the root to prepend to
>>> # the relative cache path. The default for this property is the
>>> # current working directory.
>>> felix.cache.rootdir=${user.dir}
>>>
>>> # The following property controls whether the bundle cache is flushed
>>> # the first time the framework is initialized. Possible values are
>>> # "none" and "onFirstInit"; the default is "none".
>>> org.osgi.framework.storage.clean=onFirstInit
>>>
>>> # The following property determines which actions are performed when
>>> # processing the auto-deploy directory. It is a comma-delimited list of
>>> # the following values: 'install', 'start', 'update', and 'uninstall'.
>>> # An undefined or blank value is equivalent to disabling auto-deploy
>>> # processing.
>>> felix.auto.deploy.action=install,start
>>>
>>> # The following property specifies the directory to use as the bundle
>>> # auto-deploy directory; the default is 'bundle' in the working directory.
>>> felix.auto.deploy.dir=./dependencies/main
>>>
>>> # The following property is a space-delimited list of bundle URLs
>>> # to install when the framework starts. The ending numerical component
>>> # is the target start level. Any number of these properties may be
>>> # specified for different start levels.
>>> #felix.auto.install.1=
>>>
>>> # The following property is a space-delimited list of bundle URLs
>>> # to install and start when the framework starts. The ending numerical
>>> # component is the target start level. Any number of these properties
>>> # may be specified for different start levels.
>>> #felix.auto.start.1=
>>>
>>> felix.log.level=1
>>>
>>> # Sets the initial start level of the framework upon startup.
>>> #org.osgi.framework.startlevel.beginning=1
>>>
>>> # Sets the start level of newly installed bundles.
>>> #felix.startlevel.bundle=1
>>>
>>> # Felix installs a stream and content handler factories by default,
>>> # uncomment the following line to not install them.
>>> #felix.service.urlhandlers=false
>>>
>>> # The launcher registers a shutdown hook to cleanly stop the framework
>>> # by default, uncomment the following line to disable it.
>>> #felix.shutdown.hook=false
>>>
>>> #
>>> # Bundle config properties.
>>> #
>>> org.osgi.service.http.port=8080
>>> obr.repository.url=http://felix.apache.org/obr/releases.xml
>>>
>>> # File install configuration
>>> felix.fileinstall.dir=./lib
>>> felix.fileinstall.log.level=1
>>> felix.fileinstall.noInitialDelay=true
>>> felix.fileinstall.poll=10000
>>>
>>>
>>> --
>>> Dr Benoît Thiébault
>>> Project Manager
>>>
>>>  Artenum Toulouse - Science & Groupware
>>>  http://www.artenum.com
>>>
>>>      Bâtiment Calfocenter
>>>      10, rue Marguerite-Long
>>>      31320 Castanet-Tolosan
>>>      France
>>>      Phone: +33 (0)5 82 95 19 00
>>>
>>>
>>>
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>>>
>>
>> ---------------------------------------------------------------------
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>>
>
> --
> Dr Benoît Thiébault
> Project Manager
>
>   Artenum Toulouse - Science & Groupware
>   http://www.artenum.com
>
>       Bâtiment Calfocenter
>       10, rue Marguerite-Long
>       31320 Castanet-Tolosan
>       France
>       Phone: +33 (0)5 82 95 19 00
>
>

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