Re: [Neo4j] Neo4j on OSGi
Hi guys, I've posted a video on Youtube [1] showing how neo4j server runs on OSGi after a bit of work. Currently the REST API is working fine. The webadmin is also working but there are a few things which don't like the gremlin shell (seems related to grrovy stuffs). Also some links in the server info panel are not working. It seems that links having spaces like Primitive count don't work on my Mac, but they were working yesterday on my other windows computer. I'm not sure this is related with OSGi... Also there seem to have a problem when the RRD database starts but this is minor stuff I guess. So, to do that I've made a few modification in neo4j source code. Especially in the server module, I had to move classes and rename package so the bundle namespace don't overlap anymore with server-api module. Then I've created an OSGiActivator and a specific bootstrapper which : - look for embedded HttpService - registers ServerModules as OSGi services. Then when the server starts it starts registered ServerModules so they can be deployed using Jersey Servlet on HttpService. I don't know if you wish to integrate these modifications in neo4j or even have a review of the modifications i've made. May be I can send a few pull request so at least you can get modifications which make OSGi integration much easier. Modifications are available in my forked repository [2]. Thanks for your feedback. [1] http://www.youtube.com/watch?v=Ufuf7xcv4Mk [2] https://github.com/njouanin/community Le 28 avr. 2011 à 16:07, Nicolas Jouanin a écrit : I've commited a completed implementation for this class [1]. This implementation introspects bundles on their startup and register any service declared in META-INF/services as an OSGi service. I've added a filter to this behaviour, so it only does the work for bundles having the Export-Services directive set to true in MANIFEST.MF. This avoids registration of unwanted services like those declared in the jersey bundle. = this helps me a lot on my current work. Now I have server+webadmin nearly working inside felix :) [1] https://github.com/njouanin/community/blob/master/kernel/src/main/java/org/neo4j/kernel/impl/osgi/OSGiExtensionLoader.java 2011/4/28 Tobias Ivarsson tobias.ivars...@neotechnology.com Right, OSGiExtensionLoader is not completed, but it is supposed to work roughly as you have outlined. -tobias On Wed, Apr 27, 2011 at 1:07 PM, Nicolas Jouanin nicolas.joua...@gmail.comwrote: Hi Andreas, I'm currently looking at class OSGiExtensionLoader and I wonder what's the final purpose of this class ? I mean currently it's used to load extensions which are registered as OSGi services through the loadExtensionsOfType method. Also it manages a list of bundle but does nothing with it. I think there's something missing here. I guess it should introspect theses bundle and register services declared in META-INF/services/ . Is that it ? Nicolas. 2011/4/25 Andreas Kollegger andreas.kolleg...@neotechnology.com Hi Nicolas, I had done some work with embedding an OSGi environment within the server to host plugins, hoping to slowly modularize the server in a sensible way. But that code has been pulled out, as we opted for the Java ServiceLoader approach for plugins. When deploying into an OSGi environment, I've approached it as embedded development. The server only adds the REST api (which isn't needed when talking directly to the database), and the Webadmin (replaced by the OSGi webconsole. well, except for visualization). We've been relaxed about good OSGi discipline in the server bits, because it seemed like OSGi development is embedded development. Are you developing an application in OSGi, or are you interested in replicating the server (including REST+webadmin) in OSGi? -Andreas On Apr 25, 2011, at 5:50 AM, Nicolas Jouanin wrote: Hi, I think an OSGi section in the Neo4j wiki would be great. Of course there's no problem for adding content from my documentation into Neo4j wiki. Let me know if you want me to do it. Concerning OSGi support for the server, I'm also working on it. Currently I'm trying to make the server component run using HttpService for deployment, and use OSGi services to discover the graphDb and server modules. I have some troubles because of server and server-api packages which overlap and protected or even private method or class declaration. You can follow the work on github : https://github.com/njouanin/community (currently working on move-server branch). Nicolas. Le 24 avr. 2011 à 23:17, Peter Neubauer a écrit : Nicolas, Great and concise write-up! Would it be ok to include something along these lines into the documentation for neo4j that gets compiled into http://docs.neo4j.org/ ? An OSGi related section is certainly a good idea
Re: [Neo4j] Neo4j on OSGi
Right, OSGiExtensionLoader is not completed, but it is supposed to work roughly as you have outlined. -tobias On Wed, Apr 27, 2011 at 1:07 PM, Nicolas Jouanin nicolas.joua...@gmail.comwrote: Hi Andreas, I'm currently looking at class OSGiExtensionLoader and I wonder what's the final purpose of this class ? I mean currently it's used to load extensions which are registered as OSGi services through the loadExtensionsOfType method. Also it manages a list of bundle but does nothing with it. I think there's something missing here. I guess it should introspect theses bundle and register services declared in META-INF/services/ . Is that it ? Nicolas. 2011/4/25 Andreas Kollegger andreas.kolleg...@neotechnology.com Hi Nicolas, I had done some work with embedding an OSGi environment within the server to host plugins, hoping to slowly modularize the server in a sensible way. But that code has been pulled out, as we opted for the Java ServiceLoader approach for plugins. When deploying into an OSGi environment, I've approached it as embedded development. The server only adds the REST api (which isn't needed when talking directly to the database), and the Webadmin (replaced by the OSGi webconsole. well, except for visualization). We've been relaxed about good OSGi discipline in the server bits, because it seemed like OSGi development is embedded development. Are you developing an application in OSGi, or are you interested in replicating the server (including REST+webadmin) in OSGi? -Andreas On Apr 25, 2011, at 5:50 AM, Nicolas Jouanin wrote: Hi, I think an OSGi section in the Neo4j wiki would be great. Of course there's no problem for adding content from my documentation into Neo4j wiki. Let me know if you want me to do it. Concerning OSGi support for the server, I'm also working on it. Currently I'm trying to make the server component run using HttpService for deployment, and use OSGi services to discover the graphDb and server modules. I have some troubles because of server and server-api packages which overlap and protected or even private method or class declaration. You can follow the work on github : https://github.com/njouanin/community (currently working on move-server branch). Nicolas. Le 24 avr. 2011 à 23:17, Peter Neubauer a écrit : Nicolas, Great and concise write-up! Would it be ok to include something along these lines into the documentation for neo4j that gets compiled into http://docs.neo4j.org/ ? An OSGi related section is certainly a good idea. Andreas Kollegger has been playing with the OSGi side of things regarding the server, but I don't know the state of it at the moment. Andreas, any status? Cheers, /peter neubauer GTalk: neubauer.peter Skype peter.neubauer Phone +46 704 106975 LinkedIn http://www.linkedin.com/in/neubauer Twitter http://twitter.com/peterneubauer http://www.neo4j.org - Your high performance graph database. http://startupbootcamp.org/- Öresund - Innovation happens HERE. http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. On Mon, Apr 18, 2011 at 2:40 PM, Nicolas Jouanin nicolas.joua...@gmail.com wrote: Hi, I've written a step-by-step guide for installing Neo4j on OSGi ( http://wiki.escapek.org/display/DEV/Neo4j+community+edition+installation ). It is based on my own experience and currently it shows how to install Neo4j community edition and opening a Embedded Graph Database from another bundle. A small example is provided. Next step i'd like to achieve would be a be able to only to install server, webadmin or ha features but also make them running using OSGi HTTPService for example. Those features could also for example look for exposed GraphDatabase and then register management of webadmin features automatically. I don't know if it would be useful or even if that makes sense regarding neo4j use cases. Let me know what you think about that. Nicolas. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user -- Tobias Ivarsson tobias.ivars...@neotechnology.com Hacker, Neo Technology
Re: [Neo4j] Neo4j on OSGi
I've commited a completed implementation for this class [1]. This implementation introspects bundles on their startup and register any service declared in META-INF/services as an OSGi service. I've added a filter to this behaviour, so it only does the work for bundles having the Export-Services directive set to true in MANIFEST.MF. This avoids registration of unwanted services like those declared in the jersey bundle. = this helps me a lot on my current work. Now I have server+webadmin nearly working inside felix :) [1] https://github.com/njouanin/community/blob/master/kernel/src/main/java/org/neo4j/kernel/impl/osgi/OSGiExtensionLoader.java 2011/4/28 Tobias Ivarsson tobias.ivars...@neotechnology.com Right, OSGiExtensionLoader is not completed, but it is supposed to work roughly as you have outlined. -tobias On Wed, Apr 27, 2011 at 1:07 PM, Nicolas Jouanin nicolas.joua...@gmail.comwrote: Hi Andreas, I'm currently looking at class OSGiExtensionLoader and I wonder what's the final purpose of this class ? I mean currently it's used to load extensions which are registered as OSGi services through the loadExtensionsOfType method. Also it manages a list of bundle but does nothing with it. I think there's something missing here. I guess it should introspect theses bundle and register services declared in META-INF/services/ . Is that it ? Nicolas. 2011/4/25 Andreas Kollegger andreas.kolleg...@neotechnology.com Hi Nicolas, I had done some work with embedding an OSGi environment within the server to host plugins, hoping to slowly modularize the server in a sensible way. But that code has been pulled out, as we opted for the Java ServiceLoader approach for plugins. When deploying into an OSGi environment, I've approached it as embedded development. The server only adds the REST api (which isn't needed when talking directly to the database), and the Webadmin (replaced by the OSGi webconsole. well, except for visualization). We've been relaxed about good OSGi discipline in the server bits, because it seemed like OSGi development is embedded development. Are you developing an application in OSGi, or are you interested in replicating the server (including REST+webadmin) in OSGi? -Andreas On Apr 25, 2011, at 5:50 AM, Nicolas Jouanin wrote: Hi, I think an OSGi section in the Neo4j wiki would be great. Of course there's no problem for adding content from my documentation into Neo4j wiki. Let me know if you want me to do it. Concerning OSGi support for the server, I'm also working on it. Currently I'm trying to make the server component run using HttpService for deployment, and use OSGi services to discover the graphDb and server modules. I have some troubles because of server and server-api packages which overlap and protected or even private method or class declaration. You can follow the work on github : https://github.com/njouanin/community (currently working on move-server branch). Nicolas. Le 24 avr. 2011 à 23:17, Peter Neubauer a écrit : Nicolas, Great and concise write-up! Would it be ok to include something along these lines into the documentation for neo4j that gets compiled into http://docs.neo4j.org/ ? An OSGi related section is certainly a good idea. Andreas Kollegger has been playing with the OSGi side of things regarding the server, but I don't know the state of it at the moment. Andreas, any status? Cheers, /peter neubauer GTalk: neubauer.peter Skype peter.neubauer Phone +46 704 106975 LinkedIn http://www.linkedin.com/in/neubauer Twitter http://twitter.com/peterneubauer http://www.neo4j.org - Your high performance graph database. http://startupbootcamp.org/- Öresund - Innovation happens HERE. http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. On Mon, Apr 18, 2011 at 2:40 PM, Nicolas Jouanin nicolas.joua...@gmail.com wrote: Hi, I've written a step-by-step guide for installing Neo4j on OSGi ( http://wiki.escapek.org/display/DEV/Neo4j+community+edition+installation ). It is based on my own experience and currently it shows how to install Neo4j community edition and opening a Embedded Graph Database from another bundle. A small example is provided. Next step i'd like to achieve would be a be able to only to install server, webadmin or ha features but also make them running using OSGi HTTPService for example. Those features could also for example look for exposed GraphDatabase and then register management of webadmin features automatically. I don't know if it would be useful or even if that makes sense regarding neo4j use cases. Let me know what you think about
Re: [Neo4j] Neo4j on OSGi
Hi, I think an OSGi section in the Neo4j wiki would be great. Of course there's no problem for adding content from my documentation into Neo4j wiki. Let me know if you want me to do it. Concerning OSGi support for the server, I'm also working on it. Currently I'm trying to make the server component run using HttpService for deployment, and use OSGi services to discover the graphDb and server modules. I have some troubles because of server and server-api packages which overlap and protected or even private method or class declaration. You can follow the work on github : https://github.com/njouanin/community (currently working on move-server branch). Nicolas. Le 24 avr. 2011 à 23:17, Peter Neubauer a écrit : Nicolas, Great and concise write-up! Would it be ok to include something along these lines into the documentation for neo4j that gets compiled into http://docs.neo4j.org/ ? An OSGi related section is certainly a good idea. Andreas Kollegger has been playing with the OSGi side of things regarding the server, but I don't know the state of it at the moment. Andreas, any status? Cheers, /peter neubauer GTalk: neubauer.peter Skype peter.neubauer Phone +46 704 106975 LinkedIn http://www.linkedin.com/in/neubauer Twitter http://twitter.com/peterneubauer http://www.neo4j.org - Your high performance graph database. http://startupbootcamp.org/- Öresund - Innovation happens HERE. http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. On Mon, Apr 18, 2011 at 2:40 PM, Nicolas Jouanin nicolas.joua...@gmail.com wrote: Hi, I've written a step-by-step guide for installing Neo4j on OSGi ( http://wiki.escapek.org/display/DEV/Neo4j+community+edition+installation). It is based on my own experience and currently it shows how to install Neo4j community edition and opening a Embedded Graph Database from another bundle. A small example is provided. Next step i'd like to achieve would be a be able to only to install server, webadmin or ha features but also make them running using OSGi HTTPService for example. Those features could also for example look for exposed GraphDatabase and then register management of webadmin features automatically. I don't know if it would be useful or even if that makes sense regarding neo4j use cases. Let me know what you think about that. Nicolas. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4j on OSGi
Hi Nicolas, I had done some work with embedding an OSGi environment within the server to host plugins, hoping to slowly modularize the server in a sensible way. But that code has been pulled out, as we opted for the Java ServiceLoader approach for plugins. When deploying into an OSGi environment, I've approached it as embedded development. The server only adds the REST api (which isn't needed when talking directly to the database), and the Webadmin (replaced by the OSGi webconsole. well, except for visualization). We've been relaxed about good OSGi discipline in the server bits, because it seemed like OSGi development is embedded development. Are you developing an application in OSGi, or are you interested in replicating the server (including REST+webadmin) in OSGi? -Andreas On Apr 25, 2011, at 5:50 AM, Nicolas Jouanin wrote: Hi, I think an OSGi section in the Neo4j wiki would be great. Of course there's no problem for adding content from my documentation into Neo4j wiki. Let me know if you want me to do it. Concerning OSGi support for the server, I'm also working on it. Currently I'm trying to make the server component run using HttpService for deployment, and use OSGi services to discover the graphDb and server modules. I have some troubles because of server and server-api packages which overlap and protected or even private method or class declaration. You can follow the work on github : https://github.com/njouanin/community (currently working on move-server branch). Nicolas. Le 24 avr. 2011 à 23:17, Peter Neubauer a écrit : Nicolas, Great and concise write-up! Would it be ok to include something along these lines into the documentation for neo4j that gets compiled into http://docs.neo4j.org/ ? An OSGi related section is certainly a good idea. Andreas Kollegger has been playing with the OSGi side of things regarding the server, but I don't know the state of it at the moment. Andreas, any status? Cheers, /peter neubauer GTalk: neubauer.peter Skype peter.neubauer Phone +46 704 106975 LinkedIn http://www.linkedin.com/in/neubauer Twitter http://twitter.com/peterneubauer http://www.neo4j.org - Your high performance graph database. http://startupbootcamp.org/- Öresund - Innovation happens HERE. http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. On Mon, Apr 18, 2011 at 2:40 PM, Nicolas Jouanin nicolas.joua...@gmail.com wrote: Hi, I've written a step-by-step guide for installing Neo4j on OSGi ( http://wiki.escapek.org/display/DEV/Neo4j+community+edition+installation). It is based on my own experience and currently it shows how to install Neo4j community edition and opening a Embedded Graph Database from another bundle. A small example is provided. Next step i'd like to achieve would be a be able to only to install server, webadmin or ha features but also make them running using OSGi HTTPService for example. Those features could also for example look for exposed GraphDatabase and then register management of webadmin features automatically. I don't know if it would be useful or even if that makes sense regarding neo4j use cases. Let me know what you think about that. Nicolas. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4j on OSGi
Nicolas, Great and concise write-up! Would it be ok to include something along these lines into the documentation for neo4j that gets compiled into http://docs.neo4j.org/ ? An OSGi related section is certainly a good idea. Andreas Kollegger has been playing with the OSGi side of things regarding the server, but I don't know the state of it at the moment. Andreas, any status? Cheers, /peter neubauer GTalk: neubauer.peter Skype peter.neubauer Phone +46 704 106975 LinkedIn http://www.linkedin.com/in/neubauer Twitter http://twitter.com/peterneubauer http://www.neo4j.org - Your high performance graph database. http://startupbootcamp.org/ - Öresund - Innovation happens HERE. http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. On Mon, Apr 18, 2011 at 2:40 PM, Nicolas Jouanin nicolas.joua...@gmail.com wrote: Hi, I've written a step-by-step guide for installing Neo4j on OSGi ( http://wiki.escapek.org/display/DEV/Neo4j+community+edition+installation). It is based on my own experience and currently it shows how to install Neo4j community edition and opening a Embedded Graph Database from another bundle. A small example is provided. Next step i'd like to achieve would be a be able to only to install server, webadmin or ha features but also make them running using OSGi HTTPService for example. Those features could also for example look for exposed GraphDatabase and then register management of webadmin features automatically. I don't know if it would be useful or even if that makes sense regarding neo4j use cases. Let me know what you think about that. Nicolas. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
