| ## OSGi Options supported by Concierge |
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| Concierge allows you to set various framework launching properties as defined by the OSGi specification. The most important ones are described here. |
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| ### System Packages Extra |
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| The `osgi.framework.system.packages.extra` property identifies extra packages which the system bundle must export. |
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| These packages will be added to the packages listed by the `osgi.framework.system.packages` property, which contains the main OSGi framework packages. Do not change the `osgi.framework.system.packages` property unless you know what you are doing. The default `osgi.framework.system.packages` provided by Concierge contains the following packages: |
| ``` |
| org.osgi.framework, |
| org.osgi.framework.hooks.bundle, |
| org.osgi.framework.hooks.resolver, |
| org.osgi.framework.hooks.service, |
| org.osgi.framework.hooks.weaving, |
| org.osgi.framework.launch, |
| org.osgi.framework.namespace, |
| org.osgi.framework.startlevel, |
| org.osgi.framework.wiring, |
| org.osgi.resource, |
| org.osgi.service.log, |
| org.osgi.service.packageadmin, |
| org.osgi.service.startlevel, |
| org.osgi.service.url, |
| org.osgi.service.resolver, |
| org.osgi.util.tracker |
| ``` |
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| ### OSGi Bootdelegation |
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| The `org.osgi.framework.bootdelegation` launching property identifies packages for which the Framework must delegate class loading to the parent class loader of the bundle. This must be used for packages that are required by a bundle, although not stated as an Import-Package. By default Concierge only delegates `java.*` packages to the parent class loader. If you use `javax.*` and/or `sun.*` packages you should explicitly set the `org.osgi.framework.bootdelegation` property to `javax.*,sun.*`. If you need to add other packages as well, double check whether you shouldn't have to add the package as an Import-Package of your bundle and use `osgi.framework.system.packages.extra` to have this package exported by the Framework. |
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| ### Framework Parent ClassLoader |
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| The org.osgi.framework.bundle.parent launching property specifies the parent class loader type for all bundle class loaders. This defaults to the boot classloader. Available options are: |
| * boot - use the boot classloader (default) |
| * ext - use the extension classloader |
| * app - use the application classloader |
| * framework - use the framework bundle classloader |
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