Off Platform Sybase connection using Spring Boot and Cloud Foundry - eclipse

Question

I am trying to create an off-platform sybase connection in my application.
I am using Spring boot and have also created a user provided service at CF.
what extension classes would I need to create or use to achieve this ?
I have done oracle connection using OracleServiceInfo and OracleServiceInfoCreator class.
but there is no SybaseServiceInfo class.
Below are the details for the ups
{
"credentials": {
"hostname": "host",
"jdbcUrl": "jdbc:sybase://username:password#host:port/name",
"name": "name",
"password": "password",
"port": "port",
"uri": "sybase://username:password#host:port/name",
"username": "username"
},
"label": "user-provided",
"name": "SYBDB",
"syslog_drain_url": "",
"tags": []
}
I am new to CF. Any help would be great.
After looking into Scott Fredrick's reply I took below mentioned steps :
I have created a ServiceInfoCreator class and a ServiceInfo class as mentioned below:
ServiceInfoCreator
import java.util.Map;
import org.springframework.cloud.cloudfoundry.CloudFoundryServiceInfoCreator;
import org.springframework.cloud.cloudfoundry.Tags;
import org.springframework.context.annotation.Profile;
#Profile({ "cloud" })
public class SybaseServiceInfoCreator extends
CloudFoundryServiceInfoCreator<SQLDBServiceInfo> {
public SybaseServiceInfoCreator(Tags tags, String[] uriSchemes) {
super(new Tags(), "sybase");
// TODO Auto-generated constructor stub
}
#Override
public SQLDBServiceInfo createServiceInfo(Map<String, Object> serviceData) {
// TODO Auto-generated method stub
#SuppressWarnings("unchecked")
Map<String, String> credentials = (Map<String, String>) serviceData
.get("credentials");
String id = serviceData.get("name").toString();
String uri = credentials.get("uri");
return new SQLDBServiceInfo(id, uri);
}
}
ServiceInfo
import org.springframework.cloud.service.UriBasedServiceInfo;
public class SQLDBServiceInfo extends UriBasedServiceInfo {
public SQLDBServiceInfo(String id, String uriString) {
super(id, uriString);
// TODO Auto-generated constructor stub
}
}
and I made an entry in META-INF/Services/org.springframework.cloud.cloudfoundry.CloudFoundryServiceInfoCreator
com.x.y.SybaseServiceInfoCreator
but I get the below error when I push the application :
2015-04-20T16:28:59.85+0530 [App/0] ERR ... 190 more
2015-04-20T16:28:59.85+0530 [App/0] ERR Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.cloud.C
loud]: Factory method 'cloud' threw exception; nested exception is java.util.ServiceConfigurationError: org.springframework.cloud.CloudConnector: Provider or
g.springframework.cloud.cloudfoundry.CloudFoundryConnector could not be instantiated
2015-04-20T16:28:59.85+0530 [App/0] ERR at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrat
egy.java:189)
2015-04-20T16:28:59.85+0530 [App/0] ERR at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorRes
olver.java:588)
2015-04-20T16:28:59.85+0530 [App/0] ERR ... 202 more
2015-04-20T16:28:59.85+0530 [App/0] ERR Caused by: java.util.ServiceConfigurationError: org.springframework.cloud.CloudConnector: Provider org.springframew
ork.cloud.cloudfoundry.CloudFoundryConnector could not be instantiated
2015-04-20T16:28:59.85+0530 [App/0] ERR at java.util.ServiceLoader.fail(ServiceLoader.java:232)
2015-04-20T16:28:59.85+0530 [App/0] ERR at java.util.ServiceLoader.access$100(ServiceLoader.java:185)
2015-04-20T16:28:59.85+0530 [App/0] ERR at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:384)
2015-04-20T16:28:59.85+0530 [App/0] ERR at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:404)
2015-04-20T16:28:59.85+0530 [App/0] ERR at java.util.ServiceLoader$1.next(ServiceLoader.java:480)
2015-04-20T16:28:59.85+0530 [App/0] ERR at org.springframework.cloud.CloudFactory.scanCloudConnectors(CloudFactory.java:91)
2015-04-20T16:28:59.85+0530 [App/0] ERR at org.springframework.cloud.CloudFactory.<init>(CloudFactory.java:35)
2015-04-20T16:28:59.85+0530 [App/0] ERR at com.x.y.config.CloudAdminConfig.cloud(CloudAdminConfig.java:56)
2015-04-20T16:28:59.85+0530 [App/0] ERR at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2015-04-20T16:28:59.85+0530 [App/0] ERR at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
2015-04-20T16:28:59.85+0530 [App/0] ERR at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
2015-04-20T16:28:59.85+0530 [App/0] ERR at java.lang.reflect.Method.invoke(Method.java:483)
2015-04-20T16:28:59.85+0530 [App/0] ERR at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrat
egy.java:162)
2015-04-20T16:28:59.85+0530 [App/0] ERR ... 203 more
2015-04-20T16:28:59.85+0530 [App/0] ERR Caused by: java.util.ServiceConfigurationError: org.springframework.cloud.cloudfoundry.CloudFoundryServiceInfoCreat
or: Provider com.x.y.config.SybaseServiceInfoCreator could not be instantiated
2015-04-20T16:28:59.85+0530 [App/0] ERR at java.util.ServiceLoader.fail(ServiceLoader.java:232)
2015-04-20T16:28:59.85+0530 [App/0] ERR at java.util.ServiceLoader.access$100(ServiceLoader.java:185)
2015-04-20T16:28:59.85+0530 [App/0] ERR at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:384)
2015-04-20T16:28:59.85+0530 [App/0] ERR at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:404)
2015-04-20T16:28:59.85+0530 [App/0] ERR at java.util.ServiceLoader$1.next(ServiceLoader.java:480)
2015-04-20T16:28:59.86+0530 [App/0] ERR at org.springframework.cloud.AbstractCloudConnector.scanServiceInfoCreators(AbstractCloudConnector.java:53)
2015-04-20T16:28:59.86+0530 [App/0] ERR at org.springframework.cloud.AbstractCloudConnector.<init>(AbstractCloudConnector.java:33)
2015-04-20T16:28:59.86+0530 [App/0] ERR at org.springframework.cloud.cloudfoundry.CloudFoundryConnector.<init>(CloudFoundryConnector.java:32)
2015-04-20T16:28:59.86+0530 [App/0] ERR at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
2015-04-20T16:28:59.86+0530 [App/0] ERR at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
2015-04-20T16:28:59.86+0530 [App/0] ERR at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
2015-04-20T16:28:59.86+0530 [App/0] ERR at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
2015-04-20T16:28:59.86+0530 [App/0] ERR at java.lang.Class.newInstance(Class.java:438)
2015-04-20T16:28:59.86+0530 [App/0] ERR at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:380)
2015-04-20T16:28:59.86+0530 [App/0] ERR ... 213 more
2015-04-20T16:28:59.86+0530 [App/0] ERR Caused by: java.lang.InstantiationException: com.x.y.config.SybaseServiceInfoCreator
2015-04-20T16:28:59.86+0530 [App/0] ERR at java.lang.Class.newInstance(Class.java:423)
2015-04-20T16:28:59.86+0530 [App/0] ERR at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:380)
2015-04-20T16:28:59.86+0530 [App/0] ERR ... 224 more
2015-04-20T16:28:59.86+0530 [App/0] ERR Caused by: java.lang.NoSuchMethodException: com.x.y.config.SybaseServiceInfoCreator.<init>()
2015-04-20T16:28:59.86+0530 [App/0] ERR at java.lang.Class.getConstructor0(Class.java:3074)
2015-04-20T16:28:59.86+0530 [App/0] ERR at java.lang.Class.newInstance(Class.java:408)
2015-04-20T16:28:59.86+0530 [App/0] ERR ... 225 more
2015-04-20T16:29:02.38+0530 [DEA] OUT Instance (index 0) failed to start accepting connections
2015-04-20T16:29:02.39+0530 [API] OUT App instance exited with guid e946c9db-afdc-459a-bd01-ff718a5900db payload: {"cc_partition"=>"default", "droplet"=>
"e946c9db-afdc-459a-bd01-ff718a5900db", "version"=>"aeb7dbc8-e856-445b-80f1-0ff56339e1f5", "instance"=>"3efe1b541e2a4c6eb6aaecd7daac1143", "index"=>0, "reaso
n"=>"CRASHED", "exit_status"=>1, "exit_description"=>"app instance exited", "crash_timestamp"=>1429527542}
Not sure what I am messing up.
There's also a warning that it cannot find the ServiceInfoCreator in the beginning
2015-04-20T18:04:59.98+0530 [App/0] OUT 2015-04-20 12:34:59.988 WARN 33 --- [ main] o.c.r.o.s.cloud.AbstractCloudConnector : No suitable servi
ce info creator found for service SYBDB Did you forget to add a ServiceInfoCreator?

Answer 1

Spring Cloud Connectors is the project that provides the OracleServiceInfo and OracleServiceInfoCreator classes that you mentioned. As you've said, Spring Cloud Connectors doesn't support Sybase database connections. So, you have two choices:
1) Extend Spring Cloud Connectors to support Sybase connections via a user-provided service. Documentation on writing such an extension can be found here and here. These extension classes can be in your project or in a separate library, they don't need to be a part of the core SCC project for you to use them.
2) Use the vcap properties that Spring Boot automatically adds to the environment when it detects that an app is running on Cloud Foundry. You could do something as simple as including a #Value("${vcap.services.sybase.credentials.jdbcUrl}") annotation on a Spring bean and use that value to create a DataSource bean. See here for more details.
The second choice is far simpler, and is a good place to start. If you just have one application that will use this type of connection then this might suffice. If you need to use this type of connection in multiple apps then writing the SCC extension in the first option and making that a re-usable library would be a better option.

Answer 2

Thanks.That seemed to be the problem.
This is how I created my classes now
ServiceInfoCreator
#Profile({ "cloud" })
public class SybaseServiceInfoCreator extends
RelationalServiceInfoCreator<SybaseServiceInfo> {
public SybaseServiceInfoCreator() {
super(new Tags(), "sybase");
}
#Override
public SybaseServiceInfo createServiceInfo(String id, String uri) {
// TODO Auto-generated method stub
return new SybaseServiceInfo(id, uri, "sybase");
}
}
ServiceInfo
#Profile({ "cloud" })
#ServiceInfo.ServiceLabel("sybase")
public class SybaseServiceInfo extends RelationalServiceInfo {
public SybaseServiceInfo(String id, String url, String uri) {
super(id, validateUrl(url), uri);
}
private static String validateUrl(String url) {
if (parse(url).getHost() == null) {
throw new IllegalArgumentException("The URL " + url
+ " does not appear to contain a hostname - are you missing a trailing slash?");
}
return url;
}
private static URI parse(String url) {
try {
return new URI(url);
} catch (URISyntaxException e) {
throw new IllegalArgumentException(e);
}
}
#Override
public String getJdbcUrl() {
return String.format("jdbc:%s:Tds:%s:%d/%s",
jdbcUrlDatabaseType,getHost(), getPort(), getPath());
}
}