I have spent a lot of time trying to integrate Hibernate and Spring MVC. But again and again I got a problems, the last one is the most hard for me.
I created a simple Maven project and added to @Configuration-class new bean:
@Bean
public DataSource dataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(env.getRequiredProperty(PROPERTY_NAME_DATABASE_DRIVER));
dataSource.setUrl(env.getRequiredProperty(PROPERTY_NAME_DATABASE_URL));
dataSource.setUsername(env.getRequiredProperty(PROPERTY_NAME_DATABASE_USERNAME));
dataSource.setPassword(env.getRequiredProperty(PROPERTY_NAME_DATABASE_PASSWORD));
return dataSource();
}
After building of the project I sow strange output in console:
at net.sf.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:280)
at com.mvc.app.init.BaseConfig$$EnhancerByCGLIB$$14f5e201.dataSource(<generated>)
at com.mvc.app.init.BaseConfig.dataSource(BaseConfig.java:43)
at com.mvc.app.init.BaseConfig$$EnhancerByCGLIB$$14f5e201.CGLIB$dataSource$1(<generated>)
at com.mvc.app.init.BaseConfig$$EnhancerByCGLIB$$14f5e201$$FastClassByCGLIB$$49506a23.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:280)
at com.mvc.app.init.BaseConfig$$EnhancerByCGLIB$$14f5e201.dataSource(<generated>)
at com.mvc.app.init.BaseConfig.dataSource(BaseConfig.java:43)
at com.mvc.app.init.BaseConfig$$EnhancerByCGLIB$$14f5e201.CGLIB$dataSource$1(<generated>)
...
All attempting to use links which involves controller lead to this:
exception
javax.servlet.ServletException: Servlet.init() for servlet dispatcher threw exception
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1001)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.Thread.run(Unknown Source)
root cause
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class com.mvc.app.init.BaseConfig: Instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public javax.sql.DataSource com.mvc.app.init.BaseConfig.dataSource()] threw exception; nested exception is java.lang.StackOverflowError
...
Please, give me advice what to do to avoid this errors, because I have no ideas. Thanks
You have infinite recursion:
public DataSource dataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
//...
return dataSource();
}
Change last line to:
return dataSource;
You can actually tell that by looking at the error log:
Factory method [public javax.sql.DataSource com.mvc.app.init.BaseConfig. dataSource() ] threw exception; nested exception is java.lang. StackOverflowError
Note that DriverManagerDataSource
is not suitable for production use.
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