Re: [osgi-dev] [DS] ComponentFactory.newInstance with a dynamic property
Hi, On 14.06.2010 18:13, Sangjin Lee wrote: Thanks. With the equinox DS (1.1.1.R35x_v20090806), however, I do get a ComponentException saying that it is unable to resolve a service instance (haven't tried felix yet). I have a complete proof-of-concept example that shows what I'm trying to do, and hopefully you'd be able to see for yourself: http://bit.ly/dhnyfK. Thanks for the sample, which I quickly tested on Felix DS trunk, and to my surprise ;-) it worked (It doesn't seem to work on the latest release, though). Regards Felix Thanks! Sangjin On Mon, Jun 14, 2010 at 6:42 AM, BJ Hargrave hargr...@us.ibm.com mailto:hargr...@us.ibm.com wrote: I don't see why this should not work. All you can do is refine one of the target reference which must exist for the ComponentFactory to be satisfied. So a service.target property passed to newInstance can further refine the bound reference. It may be that the current implementations do not handle this, but from a spec point of view, it should be supported. -- *BJ Hargrave* Senior Technical Staff Member, IBM OSGi Fellow and CTO of the _OSGi Alliance_ http://www.osgi.org/_ __hargr...@us.ibm.com_ mailto:hargr...@us.ibm.com office: +1 386 848 1781 mobile: +1 386 848 3788 From:Sangjin Lee sj...@apache.org mailto:sj...@apache.org To:OSGi Developer Mail List osgi-dev@mail.osgi.org mailto:osgi-dev@mail.osgi.org Date:2010/06/10 14:01 Subject:[osgi-dev] [DS] ComponentFactory.newInstance with a dynamic property Sent by:osgi-dev-boun...@mail.osgi.org mailto:osgi-dev-boun...@mail.osgi.org I have a question on the behavior of ComponentFactory.newInstance() when you inject a reference target dynamically. I have a factory component that has a unary mandatory reference to some service, but the target is intentionally left blank (so I can provide it dynamically). When I instantiate a specific instance, I want to pass in a particular type so this specific instance can bind to the right service instance. The code snippet is at _http://bit.ly/dy8kFy_. I am basically adding a property for service.target = (type=foo), so at runtime this binds specifically to a service instance of type=foo. Will this pattern work? Also, if so, how does ComponentFactory.newInstance() behave if that service is not registered yet? Will it fail immediately or will it block/wait until that particular service is registered? In a bigger context, I'm trying to see if I can use this pattern as a way to compel a specific service with a type dynamically at runtime. Is there a better pattern to compel a specific service type dynamically? Thanks much! Regards, Sangjin___ OSGi Developer Mail List osgi-dev@mail.osgi.org mailto:osgi-dev@mail.osgi.org https://mail.osgi.org/mailman/listinfo/osgi-dev ___ OSGi Developer Mail List osgi-dev@mail.osgi.org mailto:osgi-dev@mail.osgi.org https://mail.osgi.org/mailman/listinfo/osgi-dev ___ OSGi Developer Mail List osgi-dev@mail.osgi.org https://mail.osgi.org/mailman/listinfo/osgi-dev ___ OSGi Developer Mail List osgi-dev@mail.osgi.org https://mail.osgi.org/mailman/listinfo/osgi-dev
[osgi-dev] How to get runtime Memory Usage for an OSGi bundle..?
Hello Everyone, I am working on optimization and performance tuning of an OSGi based server application (uses customized Equinox as runtime and has OSGi bundles and headless Eclipse Plugins as building block). For this, I need to get the profiling data about OSGi bundles and plugins running in the application. So, is there any command or utility which can give me memory footprint of a given bundle/plugin? Some command like: osgimemusage bundle_id I tried using some of the profilers out there (Eclipse TPTP) etc, however, they have problems like: - Too heavy, they introduce their own overheads and most of the time the app jvm crashes (due to out-of-memory errors or problem with the remote agent). - Give very low level profiling info (i.e. gives info about java classes and application class level info) however, I am more interested in knowing these details at the bundle level. Thanks for the help. Best Regards, Ashish Billore ___ OSGi Developer Mail List osgi-dev@mail.osgi.org https://mail.osgi.org/mailman/listinfo/osgi-dev
Re: [osgi-dev] How to get runtime Memory Usage for an OSGi bundle..?
At one point in the past we (Equinox team) had connections to the IBM J9 JVM that could tell you about the space taken for each bundle wrt *classes* and literals. The Eclipse Core Tools [0] still have that support in but I doubt that the VM side still works. Also in the past (and perhaps still) the J9 guys worked on Resource Managed (RM) support that allowed for tracking and control of heap memory usage on a per classloader (e.g., bundle) basis. I don't know the status of this work. Jeff [0] http://wiki.eclipse.org/Core_Tools On 2010-06-15, at 7:57 AM, BJ Hargrave wrote: I don't know of such a command and I am not sure one can be properly written. There is no way to properly assign a memory object to a specific bundle. For example, which bundle should be the owner of a HashMap object? No matter what rules you construct to decide this, there is a reasonable case in which your rule is wrong. -- BJ Hargrave Senior Technical Staff Member, IBM OSGi Fellow and CTO of the OSGi Alliance hargr...@us.ibm.com office: +1 386 848 1781 mobile: +1 386 848 3788 From:Ashish Billore1 ashish.billo...@in.ibm.com To:osgi-dev@mail.osgi.org Date:2010/06/15 07:36 Subject:[osgi-dev] How to get runtime Memory Usage for an OSGi bundle..? Sent by:osgi-dev-boun...@mail.osgi.org Hello Everyone, I am working on optimization and performance tuning of an OSGi based server application (uses customized Equinox as runtime and has OSGi bundles and headless Eclipse Plugins as building block). For this, I need to get the profiling data about OSGi bundles and plugins running in the application. So, is there any command or utility which can give me memory footprint of a given bundle/plugin? Some command like: osgimemusage bundle_id I tried using some of the profilers out there (Eclipse TPTP) etc, however, they have problems like: - Too heavy, they introduce their own overheads and most of the time the app jvm crashes (due to out-of-memory errors or problem with the remote agent). - Give very low level profiling info (i.e. gives info about java classes and application class level info) however, I am more interested in knowing these details at the bundle level. Thanks for the help. Best Regards, Ashish Billore ___ OSGi Developer Mail List osgi-dev@mail.osgi.org https://mail.osgi.org/mailman/listinfo/osgi-dev ___ OSGi Developer Mail List osgi-dev@mail.osgi.org https://mail.osgi.org/mailman/listinfo/osgi-dev ___ OSGi Developer Mail List osgi-dev@mail.osgi.org https://mail.osgi.org/mailman/listinfo/osgi-dev
Re: [osgi-dev] How to get runtime Memory Usage for an OSGi bundle..?
Well, you can use the JVMTI interface of the JVM in order to build your own analysis agent. Unfortunately this means writing native C/C++ code, but if you feel the need - it might be worth the effort. Mirko On Tue, Jun 15, 2010 at 4:23 PM, Jeff McAffer j...@eclipsesource.comwrote: At one point in the past we (Equinox team) had connections to the IBM J9 JVM that could tell you about the space taken for each bundle wrt *classes* and literals. The Eclipse Core Tools [0] still have that support in but I doubt that the VM side still works. Also in the past (and perhaps still) the J9 guys worked on Resource Managed (RM) support that allowed for tracking and control of heap memory usage on a per classloader (e.g., bundle) basis. I don't know the status of this work. Jeff [0] http://wiki.eclipse.org/Core_Tools On 2010-06-15, at 7:57 AM, BJ Hargrave wrote: I don't know of such a command and I am not sure one can be properly written. There is no way to properly assign a memory object to a specific bundle. For example, which bundle should be the owner of a HashMap object? No matter what rules you construct to decide this, there is a reasonable case in which your rule is wrong. -- *BJ Hargrave* Senior Technical Staff Member, IBM OSGi Fellow and CTO of the *OSGi Alliance* http://www.osgi.org/* **hargr...@us.ibm.com* hargr...@us.ibm.com office: +1 386 848 1781 mobile: +1 386 848 3788 From:Ashish Billore1 ashish.billo...@in.ibm.com To:osgi-dev@mail.osgi.org Date:2010/06/15 07:36 Subject:[osgi-dev] How to get runtime Memory Usage for an OSGi bundle..? Sent by:osgi-dev-boun...@mail.osgi.org -- Hello Everyone, I am working on optimization and performance tuning of an OSGi based server application (uses customized Equinox as runtime and has OSGi bundles and headless Eclipse Plugins as building block). For this, I need to get the profiling data about OSGi bundles and plugins running in the application. So, is there any command or utility which can give me memory footprint of a given bundle/plugin? Some command like: osgimemusage bundle_id I tried using some of the profilers out there (Eclipse TPTP) etc, however, they have problems like: - Too heavy, they introduce their own overheads and most of the time the app jvm crashes (due to out-of-memory errors or problem with the remote agent). - Give very low level profiling info (i.e. gives info about java classes and application class level info) however, I am more interested in knowing these details at the bundle level. Thanks for the help. Best Regards, Ashish Billore ___ OSGi Developer Mail List osgi-dev@mail.osgi.org https://mail.osgi.org/mailman/listinfo/osgi-dev ___ OSGi Developer Mail List osgi-dev@mail.osgi.org https://mail.osgi.org/mailman/listinfo/osgi-dev ___ OSGi Developer Mail List osgi-dev@mail.osgi.org https://mail.osgi.org/mailman/listinfo/osgi-dev ___ OSGi Developer Mail List osgi-dev@mail.osgi.org https://mail.osgi.org/mailman/listinfo/osgi-dev
Re: [osgi-dev] [DS] ComponentFactory.newInstance with a dynamic property
I don't know whether the service.target property can be taken from the configuration created by ConfigurationAdmin. If yes, you may create a component by creating a factory configuration. But that component should be declared as immediate/delay component instead of factory component. Regards, Agemo On Tue, Jun 15, 2010 at 3:33 PM, Sangjin Lee sj...@apache.org wrote: What I am suspecting is that this might be an issue of timing. If I understood the specification correctly, ComponentFactory.newInstance() will try to satisfy the constraints when invoked, and if it is unable to do so it *at that time* it will throw a ComponentException. I think it follows then that this is not a blocking call. If there is no service that can satisfy the binding at the time of invocation, the call will fail fast. Is this understanding correct? Then I don't think this can be made to work. What I was hoping for is a way to produce a component definition dynamically so they can stay unsatisfied until the service they're looking for comes online. Regards, Sangjin On Mon, Jun 14, 2010 at 9:13 AM, Sangjin Lee sjl...@gmail.com wrote: Thanks. With the equinox DS (1.1.1.R35x_v20090806), however, I do get a ComponentException saying that it is unable to resolve a service instance (haven't tried felix yet). I have a complete proof-of-concept example that shows what I'm trying to do, and hopefully you'd be able to see for yourself: http://bit.ly/dhnyfK . Thanks! Sangjin On Mon, Jun 14, 2010 at 6:42 AM, BJ Hargrave hargr...@us.ibm.com wrote: I don't see why this should not work. All you can do is refine one of the target reference which must exist for the ComponentFactory to be satisfied. So a service.target property passed to newInstance can further refine the bound reference. It may be that the current implementations do not handle this, but from a spec point of view, it should be supported. -- *BJ Hargrave* Senior Technical Staff Member, IBM OSGi Fellow and CTO of the *OSGi Alliance* http://www.osgi.org/* **hargr...@us.ibm.com* hargr...@us.ibm.com office: +1 386 848 1781 mobile: +1 386 848 3788 From:Sangjin Lee sj...@apache.org To:OSGi Developer Mail List osgi-dev@mail.osgi.org Date:2010/06/10 14:01 Subject:[osgi-dev] [DS] ComponentFactory.newInstance with a dynamic property Sent by:osgi-dev-boun...@mail.osgi.org -- I have a question on the behavior of ComponentFactory.newInstance() when you inject a reference target dynamically. I have a factory component that has a unary mandatory reference to some service, but the target is intentionally left blank (so I can provide it dynamically). When I instantiate a specific instance, I want to pass in a particular type so this specific instance can bind to the right service instance. The code snippet is at *http://bit.ly/dy8kFy*http://bit.ly/dy8kFy . I am basically adding a property for service.target = (type=foo), so at runtime this binds specifically to a service instance of type=foo. Will this pattern work? Also, if so, how does ComponentFactory.newInstance() behave if that service is not registered yet? Will it fail immediately or will it block/wait until that particular service is registered? In a bigger context, I'm trying to see if I can use this pattern as a way to compel a specific service with a type dynamically at runtime. Is there a better pattern to compel a specific service type dynamically? Thanks much! Regards, Sangjin___ OSGi Developer Mail List osgi-dev@mail.osgi.org https://mail.osgi.org/mailman/listinfo/osgi-dev ___ OSGi Developer Mail List osgi-dev@mail.osgi.org https://mail.osgi.org/mailman/listinfo/osgi-dev ___ OSGi Developer Mail List osgi-dev@mail.osgi.org https://mail.osgi.org/mailman/listinfo/osgi-dev ___ OSGi Developer Mail List osgi-dev@mail.osgi.org https://mail.osgi.org/mailman/listinfo/osgi-dev
