[SCB-562] Java Chassis will throw NPE when producer impl do not contain any method

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: java-chassis-1.0.0-m1
• Fix Version/s: java-chassis-1.0.0-m2
• Component/s: Java-Chassis
• Assignee: Yangyong Zheng
• Reporter: Yangyong Zheng
• Created: 09/May/18 00:56
• Updated: 01/Jun/18 01:14
• Resolved: 01/Jun/18 01:14

Description

If a producer impl do not contain any method like :
```java
@RestSchema(schemaId = "hello")
@Path("/")
public class HelloImpl {
}
```
Then an NPE will throw when startup:
2018-05-09 08:50:04,333 [ERROR] cse init failed,
Exception: java.lang.NullPointerException; null
java.lang.NullPointerException
at org.apache.servicecomb.swagger.generator.core.utils.ClassUtils.createInterface(ClassUtils.java:212)
at org.apache.servicecomb.swagger.generator.core.utils.ClassUtils.getOrCreateInterface(ClassUtils.java:203)
at org.apache.servicecomb.swagger.generator.core.utils.ClassUtils.getOrCreateInterface(ClassUtils.java:182)
at org.apache.servicecomb.core.definition.schema.AbstractSchemaFactory.generateSwagger(AbstractSchemaFactory.java:112)
at org.apache.servicecomb.core.definition.schema.ProducerSchemaFactory.createSchema(ProducerSchemaFactory.java:110)
at org.apache.servicecomb.core.definition.schema.ProducerSchemaFactory.createSchema(ProducerSchemaFactory.java:47)
at org.apache.servicecomb.core.definition.schema.AbstractSchemaFactory.getOrCreateSchema(AbstractSchemaFactory.java:65)
at org.apache.servicecomb.core.definition.schema.ProducerSchemaFactory.getOrCreateProducerSchema(ProducerSchemaFactory.java:80)
at org.apache.servicecomb.provider.rest.common.RestProducerProvider.init(RestProducerProvider.java:48)
at org.apache.servicecomb.core.provider.producer.ProducerProviderManager.init(ProducerProviderManager.java:45)
at org.apache.servicecomb.core.CseApplicationListener.onApplicationEvent(CseApplicationListener.java:118)
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:166)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:138)
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:383)
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:337)
at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:882)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:545)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:93)
at org.apache.servicecomb.foundation.common.utils.BeanUtils.init(BeanUtils.java:37)
at org.apache.servicecomb.foundation.common.utils.BeanUtils.init(BeanUtils.java:33)
at io.demo.Application.main(Application.java:40)
org.apache.servicecomb.core.CseApplicationListener.onApplicationEvent(CseApplicationListener.java:145)

Issue Links

• links to: GitHub Pull Request #729