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From "Nikita Timofeev (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CAY-2573) DI field injection is triggered when creating sql Driver
Date Tue, 30 Apr 2019 09:31:00 GMT
Nikita Timofeev created CAY-2573:
------------------------------------

             Summary: DI field injection is triggered when creating sql Driver
                 Key: CAY-2573
                 URL: https://issues.apache.org/jira/browse/CAY-2573
             Project: Cayenne
          Issue Type: Bug
          Components: Database integration
    Affects Versions: 4.1.B1, 4.0.1
            Reporter: Nikita Timofeev
             Fix For: 4.0.2, 4.1.B2, 4.2.M1


Some of {{DataSourceFactory}} implementations (namely {{DriverDataSourceFactory}}, {{PropertyDataSourceFactory}}
and {{XMLPoolingDataSourceFactory}}) are using {{AdhocObjectFactory}} to create {{Driver}}
instance. This have one nasty side effect: DI field injection is used in a process and it
can lead to errors.

This is an exception that is thrown by SAP HANA driver in that case:
{code:java}
java.lang.NoClassDefFoundError: Ljava/lang/ref/Cleaner;

	at java.lang.Class.getDeclaredFields0(Native Method)
	at java.lang.Class.privateGetDeclaredFields(Class.java:2583)
	at java.lang.Class.getDeclaredFields(Class.java:1916)
	at org.apache.cayenne.di.spi.FieldInjectingProvider.injectMembers(FieldInjectingProvider.java:55)
	at org.apache.cayenne.di.spi.FieldInjectingProvider.get(FieldInjectingProvider.java:44)
	at org.apache.cayenne.di.spi.DefaultAdhocObjectFactory.newInstance(DefaultAdhocObjectFactory.java:70)
{code}

I believe we should use only {{getJavaClass()}} method of {{AdhocObjectFactory}}. As a more
distant solution we can check usage of {{DriverManager}} instead of detecting and using {{Driver}}
explicitly.



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