I think we should go for databases.
On Thu, Jun 19, 2014 at 12:26 PM, Udara Liyanage <ud...@wso2.com> wrote: > Hi Chris, > > In json also if there is a it will assign the default value for non > existing variables when converting from json to java object structure. > Still if there is a considerable change in object structure, we have to > perform additional work in migration. > > Say we have introduced an variable x, which links to y in another class so > on, then we have to do additional work, otherwise it is in a inconsistent > state. > > > On Thu, Jun 19, 2014 at 12:20 PM, chris snow <chsnow...@gmail.com> wrote: > >> Hi Udara, I'm not sure of the situation with JSON, but when using XML >> it is possible to evolve a schema as long as changes are done in a >> backward compatible way. For example, if you add an optional field, >> the parsing code will be able to read xml created with and without the >> field. However, IIRC java object serialisation is much more rigid and >> this won't work. >> >> On Thu, Jun 19, 2014 at 6:45 AM, Udara Liyanage <ud...@wso2.com> wrote: >> > Hi Imesh/Dinesh, >> > >> > Though we used a readable json/xml/text still we can't migrate >> seamlessly? >> > When migrating we have to read the old json and convert it it the new >> object >> > structure. >> > Could you please explain how making it readable helps to migrate >> seamlessly. >> > >> > >> > >> > >> > >> > On Wed, Jun 18, 2014 at 2:19 PM, Imesh Gunaratne <im...@apache.org> >> wrote: >> >> >> >> Hi Dinesh, >> >> >> >> Great! Please provide your thoughts on the changes required in registry >> >> persistence logic as you progress. >> >> >> >> Thanks >> >> >> >> >> >> On Wed, Jun 18, 2014 at 12:27 PM, Dinesh Bandara <dine...@wso2.com> >> wrote: >> >>> >> >>> Hi, >> >>> >> >>> When I started work on [1] and I thought to persist cartridge >> >>> configuration in JSON format in Stratos Manager's registry and >> observed the >> >>> above behavior which does not provide the readability of existing >> artifacts. >> >>> Will work on [2] >> >>> >> >>> [1] https://issues.apache.org/jira/browse/STRATOS-568 >> >>> [2] https://issues.apache.org/jira/browse/STRATOS-664 >> >>> >> >>> Thanks >> >>> >> >>> >> >>> On Wed, Jun 4, 2014 at 10:18 AM, Imesh Gunaratne <im...@apache.org> >> >>> wrote: >> >>>> >> >>>> Hi All, >> >>>> >> >>>> In Stratos 4.0.0 Stratos Manager, Cloud Controller and Autoscaler >> store >> >>>> their artifacts in registry in binary format (Java objects are >> serialized >> >>>> and stored). This might cause problems when migrating an existing >> Stratos >> >>>> deployment to a newer version with changes in above artifacts. >> >>>> >> >>>> Therefore it would be better if we could change this format to JSON >> or >> >>>> something similar which could be easily read and updated if the >> definitions >> >>>> of the artifacts change in a newer Stratos version. >> >>>> >> >>>> More importantly we might need to create tasks in JIRA to prepare >> >>>> migration scripts if we do any modifications to the above artifacts >> once >> >>>> 4.0.0 release is done. >> >>>> >> >>>> https://issues.apache.org/jira/browse/STRATOS-664 >> >>>> >> >>>> Thanks >> >>>> >> >>>> >> >>>> -- >> >>>> Imesh Gunaratne >> >>>> >> >>>> Technical Lead, WSO2 >> >>>> Committer & PPMC Member, Apache Stratos >> >>> >> >>> >> >>> >> >>> >> >>> -- >> >>> Dinesh Bandara >> >>> Software Engineer >> >>> WSO2 Inc.; http://wso2.com >> >>> lean.enterprise.middleware >> >>> >> >> >> >> >> >> >> >> -- >> >> Imesh Gunaratne >> >> >> >> Technical Lead, WSO2 >> >> Committer & PPMC Member, Apache Stratos >> > >> > >> > >> > >> > -- >> > >> > Udara Liyanage >> > Software Engineer >> > WSO2, Inc.: http://wso2.com >> > lean. enterprise. middleware >> > >> > web: http://udaraliyanage.wordpress.com >> > phone: +94 71 443 6897 >> >> >> >> -- >> Check out my professional profile and connect with me on LinkedIn. >> http://lnkd.in/cw5k69 >> > > > > -- > > Udara Liyanage > Software Engineer > WSO2, Inc.: http://wso2.com > lean. enterprise. middleware > > web: http://udaraliyanage.wordpress.com > phone: +94 71 443 6897 > -- Best Regards, Nirmal Nirmal Fernando. PPMC Member & Committer of Apache Stratos, Senior Software Engineer, WSO2 Inc. Blog: http://nirmalfdo.blogspot.com/
