Hi Danesh,
On Mon, Nov 21, 2016 at 11:32 PM, Danesh Kuruppu <[email protected]> wrote:
> Hi all,
>
> In Carbon C5, we are going to introduce new global configuration model
> where we have only one configuration file for all server configurations.
> So that user have to maintain only one config file for a server.
>
> With New Configuration Model,
>
> - Global configuration file (deployment.yaml) includes minimal sets of
> configurations which need to override very often by default (e.g: server
> ports etc).
> - All user settable configurations must have default values and they
> are burnt into compile codes.
> - Any default configuration can overridden by adding the particular
> configuration to the global configuration file(deployment.yaml).
> - Defining all configurations in the configuration file in not
> required. add only if we need to override the default value.
> - If configurations are not specified in the configuration file,
> values defined in the bean class will apply by default.
>
> In global configuration file (deployment.yaml),
>
> - Each component will have their own configurations with a unique
> namespace (e.g: wso2.carbon, wso2.transports.netty etc) and it will be a
> fragment of deployment.yaml file. Please find the sample file below.
> - At runtime, the relevant config bean will be generated by overriding
> the default values specified in bean class with values mentioned in
> deployment.yaml file.
>
>
Who will generate the relevant config beans? If it's by kernel, how does
the kernel knows a bean from a product component? Will this lead to a
cyclic dependency like product component should depend on kernel and the
kernel should know the the product component to find the relevant config
bean?
>
> -
>
> Sample file looks like,
>
> # Carbon Configuration Parameters
> wso2.carbon:
> id: carbon-kernel
> version: 5.2.0-SNAPSHOT
> ports:
> offset: 0
> ...
>
> # Netty Transport Configurations
> wso2.transports.netty:
> listeners:
> - id: msf4j-http
> host: 127.0.0.1
> port: 8080
> bossThreadPoolSize: 2
> workerThreadPoolSize: 250
> parameters:
> - name: "executor.workerpool.size"
> value: 60
>
> ...
>
> Along with the above design, we are going to introduce new annotation
> model to the configuration beans. So each component will have its
> configuration defined as one or more Java beans annotated with the
> following annotations
>
> - *org.wso2.carbon.kernel.annotations.Configuration* - *Class level
> annotation, This corresponds to a configuration bean to be used by a
> component*
> - *org.wso2.carbon.kernel.annotations.Element* - *Field level
> annotation, This corresponds to a fields of the class*
> - *org.wso2.carbon.kernel.annotations.Ignore* - *Field level
> annotation, This is to specify that field needs to be ignored when the
> configuration is generated*
>
> Sample bean class looks like,
>
> @Configuration(namespace = "wso2.carbon", description = "Carbon Configuration
> Parameters")
> public class CarbonConfiguration {
>
> @Element(description = "value to uniquely identify a server", required =
> true)
> private String id = "carbon-kernel";
>
> @Element(description = "server name")
> private String name = "WSO2 Carbon Kernel";
>
> @Element(description = "server version")
> private String version = "5.2.0";
>
> @Ignore
> private String tenant = Constants.DEFAULT_TENANT;
>
> ...
>
> }
>
> So we are going to generate the relevant segment of the configuration
> file(for documentation purposes) automatically at compile time by reading
> above annotations and default values.
>
> If anyone needs to override the default value, He needs to copy the
> particular segment of the configuration to the deployment.yaml and change
> the value.
>
> Appreciate your input on this.
>
> Thanks
> --
>
> *Danesh Kuruppu*
> Senior Software Engineer | WSO2
>
> Email: [email protected]
> Mobile: +94 (77) 1690552
> Web: WSO2 Inc <https://wso2.com/signature>
>
>
> _______________________________________________
> Architecture mailing list
> [email protected]
> https://mail.wso2.org/cgi-bin/mailman/listinfo/architecture
>
>
--
Thanks
Abimaran Kugathasan
Senior Software Engineer - API Technologies
Email : [email protected]
Mobile : +94 773922820
<http://stackoverflow.com/users/515034>
<http://lk.linkedin.com/in/abimaran> <http://www.lkabimaran.blogspot.com/>
<https://github.com/abimarank> <https://twitter.com/abimaran>
_______________________________________________
Architecture mailing list
[email protected]
https://mail.wso2.org/cgi-bin/mailman/listinfo/architecture
