Re: [Dev] Accessing a DB through bundle starter
Hi Lochana,
Here is a sample code in platform where it uses the Service Component
approach. [1], Maybe that should work for your requirement.
Haven't tried it though.
[1].
https://svn.wso2.org/repos/wso2/carbon/platform/trunk/components/analytics/org.wso2.carbon.hive.data.source.access/src/main/java/org/wso2/carbon/hive/data/source/access/internal/DataSourceAccessComponent.java
On Fri, Nov 14, 2014 at 7:27 AM, Prabath Abeysekera praba...@wso2.com
wrote:
Hi Lochana,
On Thu, Nov 13, 2014 at 5:39 PM, Lochana Menikarachchi loch...@wso2.com
wrote:
Wonder whether it is due to bundle load order.. Is there anyway to change
it..
This could well be an issue with the bundle start up order. However, have
we tried putting a few logs in ndatasource bundle activator too and made
sure that this really is the reason why the JNDI look-up failed?
On a side note, I'm seeing you guys've extended BundleActivator to
implement the bundle initializer. I'd recommend you guys follow the
Service Component approach where it is purely declarative and much
appropriate for implementations that require access to a lot of external
declarative service dependencies, which is quite common across most of the
components we've got in the platform. Not only that, the former is
generally considered an old approach of activating a bundle, which could,
however, be used if you need to get hold of some of the very lower level
controls of the bundle activation process. There's a quite a few other
advantages too like being able to define more than one Service Components
within an OSGi bundle etc, but IMO, this is not quite needed in most of the
cases we often tend to deal with, within the platform.
Cheers,
Prabath
[2014-11-13 17:32:04,594] INFO
{org.wso2.carbon.ml.dataset.DatasetServiceActivator} - Dataset service
started
[2014-11-13 17:32:04,596] INFO
{org.wso2.carbon.ml.model.ModelServiceActivator} - Model service started
[2014-11-13 17:32:04,597] INFO
{org.wso2.carbon.ml.project.mgt.ProjectManagementServiceActivator} -
Project management service started
[2014-11-13 17:32:04,597] INFO
{org.wso2.carbon.ml.project.mgt.ProjectManagementServiceActivator} - ML
Wizard URL : http://localhost:9763/mlUI
[2014-11-13 17:32:05,536] INFO
{org.wso2.carbon.user.core.ldap.ReadWriteLDAPUserStoreManager} - LDAP
connection created successfully in read-write mode
[2014-11-13 17:32:05,709] INFO
{org.wso2.carbon.registry.core.jdbc.EmbeddedRegistryService} - Configured
Registry in 83ms
On Thu, Nov 13, 2014 at 4:59 PM, Lochana Menikarachchi loch...@wso2.com
wrote:
Is it possible access a database within osgi bundle's start method?
public void start(BundleContext context) throws Exception {
ModelService modelService = new ModelService();
context.registerService(ModelService.class.getName(),
modelService, null);
* MLAlgorithmConfiguration mlAlgorithmConfiguration = new
MLAlgorithmConfiguration();
mlAlgorithmConfiguration.loadMLAlgorithmConfigurations();*
logger.info(Model service started);
}
loadMLConfigurations loads some default values to a database. Adding
bold lettered lines throws following exception
INFO {org.wso2.carbon.ml.dataset.DatasetServiceActivator} - Dataset
service started
[2014-11-13 16:48:49,589] ERROR
{org.wso2.carbon.ml.model.DatabaseHandler} - An error occurred while
connecting to database. Name [jdbc/WSO2ML_DB] is not bound in this Context.
Unable to find [jdbc].
javax.naming.NameNotFoundException: Name [jdbc/WSO2ML_DB] is not bound
in this Context. Unable to find [jdbc].
at org.apache.naming.NamingContext.lookup(NamingContext.java:819)
at org.apache.naming.NamingContext.lookup(NamingContext.java:167)
at
org.wso2.carbon.context.internal.CarbonContextDataHolder$CarbonInitialJNDIContext.lookup(CarbonContextDataHolder.java:705)
at javax.naming.InitialContext.lookup(InitialContext.java:411)
at
org.wso2.carbon.ml.model.DatabaseHandler.getDatabaseHandler(DatabaseHandler.java:62)
--
Lochana Menikarachchi
Senior Tech Lead
WSO2 Inc.
--
Lochana Menikarachchi
Senior Tech Lead
WSO2 Inc.
___
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--
Prabath Abeysekara
Associate Technical Lead, Data TG.
WSO2 Inc.
Email: praba...@wso2.com
Mobile: +94774171471
___
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--
*Aruna Sujith Karunarathna* | Software Engineer
WSO2, Inc | lean. enterprise. middleware.
#20, Palm Grove, Colombo 03, Sri Lanka
Mobile: +94 71 9040362 | Work: +94 112145345
Email: ar...@wso2.com | Web: www.wso2.com
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[Dev] Accessing a DB through bundle starter
Is it possible access a database within osgi bundle's start method?
public void start(BundleContext context) throws Exception {
ModelService modelService = new ModelService();
context.registerService(ModelService.class.getName(),
modelService, null);
* MLAlgorithmConfiguration mlAlgorithmConfiguration = new
MLAlgorithmConfiguration();
mlAlgorithmConfiguration.loadMLAlgorithmConfigurations();*
logger.info(Model service started);
}
loadMLConfigurations loads some default values to a database. Adding bold
lettered lines throws following exception
INFO {org.wso2.carbon.ml.dataset.DatasetServiceActivator} - Dataset
service started
[2014-11-13 16:48:49,589] ERROR {org.wso2.carbon.ml.model.DatabaseHandler}
- An error occurred while connecting to database. Name [jdbc/WSO2ML_DB] is
not bound in this Context. Unable to find [jdbc].
javax.naming.NameNotFoundException: Name [jdbc/WSO2ML_DB] is not bound in
this Context. Unable to find [jdbc].
at org.apache.naming.NamingContext.lookup(NamingContext.java:819)
at org.apache.naming.NamingContext.lookup(NamingContext.java:167)
at
org.wso2.carbon.context.internal.CarbonContextDataHolder$CarbonInitialJNDIContext.lookup(CarbonContextDataHolder.java:705)
at javax.naming.InitialContext.lookup(InitialContext.java:411)
at
org.wso2.carbon.ml.model.DatabaseHandler.getDatabaseHandler(DatabaseHandler.java:62)
--
Lochana Menikarachchi
Senior Tech Lead
WSO2 Inc.
___
Dev mailing list
Dev@wso2.org
http://wso2.org/cgi-bin/mailman/listinfo/dev
Re: [Dev] Accessing a DB through bundle starter
Wonder whether it is due to bundle load order.. Is there anyway to change
it..
[2014-11-13 17:32:04,594] INFO
{org.wso2.carbon.ml.dataset.DatasetServiceActivator} - Dataset service
started
[2014-11-13 17:32:04,596] INFO
{org.wso2.carbon.ml.model.ModelServiceActivator} - Model service started
[2014-11-13 17:32:04,597] INFO
{org.wso2.carbon.ml.project.mgt.ProjectManagementServiceActivator} -
Project management service started
[2014-11-13 17:32:04,597] INFO
{org.wso2.carbon.ml.project.mgt.ProjectManagementServiceActivator} - ML
Wizard URL : http://localhost:9763/mlUI
[2014-11-13 17:32:05,536] INFO
{org.wso2.carbon.user.core.ldap.ReadWriteLDAPUserStoreManager} - LDAP
connection created successfully in read-write mode
[2014-11-13 17:32:05,709] INFO
{org.wso2.carbon.registry.core.jdbc.EmbeddedRegistryService} - Configured
Registry in 83ms
On Thu, Nov 13, 2014 at 4:59 PM, Lochana Menikarachchi loch...@wso2.com
wrote:
Is it possible access a database within osgi bundle's start method?
public void start(BundleContext context) throws Exception {
ModelService modelService = new ModelService();
context.registerService(ModelService.class.getName(),
modelService, null);
* MLAlgorithmConfiguration mlAlgorithmConfiguration = new
MLAlgorithmConfiguration();
mlAlgorithmConfiguration.loadMLAlgorithmConfigurations();*
logger.info(Model service started);
}
loadMLConfigurations loads some default values to a database. Adding bold
lettered lines throws following exception
INFO {org.wso2.carbon.ml.dataset.DatasetServiceActivator} - Dataset
service started
[2014-11-13 16:48:49,589] ERROR {org.wso2.carbon.ml.model.DatabaseHandler}
- An error occurred while connecting to database. Name [jdbc/WSO2ML_DB] is
not bound in this Context. Unable to find [jdbc].
javax.naming.NameNotFoundException: Name [jdbc/WSO2ML_DB] is not bound in
this Context. Unable to find [jdbc].
at org.apache.naming.NamingContext.lookup(NamingContext.java:819)
at org.apache.naming.NamingContext.lookup(NamingContext.java:167)
at
org.wso2.carbon.context.internal.CarbonContextDataHolder$CarbonInitialJNDIContext.lookup(CarbonContextDataHolder.java:705)
at javax.naming.InitialContext.lookup(InitialContext.java:411)
at
org.wso2.carbon.ml.model.DatabaseHandler.getDatabaseHandler(DatabaseHandler.java:62)
--
Lochana Menikarachchi
Senior Tech Lead
WSO2 Inc.
--
Lochana Menikarachchi
Senior Tech Lead
WSO2 Inc.
___
Dev mailing list
Dev@wso2.org
http://wso2.org/cgi-bin/mailman/listinfo/dev
Re: [Dev] Accessing a DB through bundle starter
Hi Lochana,
On Thu, Nov 13, 2014 at 5:39 PM, Lochana Menikarachchi loch...@wso2.com
wrote:
Wonder whether it is due to bundle load order.. Is there anyway to change
it..
This could well be an issue with the bundle start up order. However, have
we tried putting a few logs in ndatasource bundle activator too and made
sure that this really is the reason why the JNDI look-up failed?
On a side note, I'm seeing you guys've extended BundleActivator to
implement the bundle initializer. I'd recommend you guys follow the
Service Component approach where it is purely declarative and much
appropriate for implementations that require access to a lot of external
declarative service dependencies, which is quite common across most of the
components we've got in the platform. Not only that, the former is
generally considered an old approach of activating a bundle, which could,
however, be used if you need to get hold of some of the very lower level
controls of the bundle activation process. There's a quite a few other
advantages too like being able to define more than one Service Components
within an OSGi bundle etc, but IMO, this is not quite needed in most of the
cases we often tend to deal with, within the platform.
Cheers,
Prabath
[2014-11-13 17:32:04,594] INFO
{org.wso2.carbon.ml.dataset.DatasetServiceActivator} - Dataset service
started
[2014-11-13 17:32:04,596] INFO
{org.wso2.carbon.ml.model.ModelServiceActivator} - Model service started
[2014-11-13 17:32:04,597] INFO
{org.wso2.carbon.ml.project.mgt.ProjectManagementServiceActivator} -
Project management service started
[2014-11-13 17:32:04,597] INFO
{org.wso2.carbon.ml.project.mgt.ProjectManagementServiceActivator} - ML
Wizard URL : http://localhost:9763/mlUI
[2014-11-13 17:32:05,536] INFO
{org.wso2.carbon.user.core.ldap.ReadWriteLDAPUserStoreManager} - LDAP
connection created successfully in read-write mode
[2014-11-13 17:32:05,709] INFO
{org.wso2.carbon.registry.core.jdbc.EmbeddedRegistryService} - Configured
Registry in 83ms
On Thu, Nov 13, 2014 at 4:59 PM, Lochana Menikarachchi loch...@wso2.com
wrote:
Is it possible access a database within osgi bundle's start method?
public void start(BundleContext context) throws Exception {
ModelService modelService = new ModelService();
context.registerService(ModelService.class.getName(),
modelService, null);
* MLAlgorithmConfiguration mlAlgorithmConfiguration = new
MLAlgorithmConfiguration();
mlAlgorithmConfiguration.loadMLAlgorithmConfigurations();*
logger.info(Model service started);
}
loadMLConfigurations loads some default values to a database. Adding bold
lettered lines throws following exception
INFO {org.wso2.carbon.ml.dataset.DatasetServiceActivator} - Dataset
service started
[2014-11-13 16:48:49,589] ERROR
{org.wso2.carbon.ml.model.DatabaseHandler} - An error occurred while
connecting to database. Name [jdbc/WSO2ML_DB] is not bound in this Context.
Unable to find [jdbc].
javax.naming.NameNotFoundException: Name [jdbc/WSO2ML_DB] is not bound in
this Context. Unable to find [jdbc].
at org.apache.naming.NamingContext.lookup(NamingContext.java:819)
at org.apache.naming.NamingContext.lookup(NamingContext.java:167)
at
org.wso2.carbon.context.internal.CarbonContextDataHolder$CarbonInitialJNDIContext.lookup(CarbonContextDataHolder.java:705)
at javax.naming.InitialContext.lookup(InitialContext.java:411)
at
org.wso2.carbon.ml.model.DatabaseHandler.getDatabaseHandler(DatabaseHandler.java:62)
--
Lochana Menikarachchi
Senior Tech Lead
WSO2 Inc.
--
Lochana Menikarachchi
Senior Tech Lead
WSO2 Inc.
___
Dev mailing list
Dev@wso2.org
http://wso2.org/cgi-bin/mailman/listinfo/dev
--
Prabath Abeysekara
Associate Technical Lead, Data TG.
WSO2 Inc.
Email: praba...@wso2.com
Mobile: +94774171471
___
Dev mailing list
Dev@wso2.org
http://wso2.org/cgi-bin/mailman/listinfo/dev
