[GORA-331] Gora 0.4 compiler crash with "enum" type

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.4, 0.5
• Fix Version/s: 0.5
• Component/s: gora-compiler
• Labels: patch
• Assignee: Damien Raude-Morvan
• Reporter: Damien Raude-Morvan
• Created: 23/May/14 22:42
• Updated: 12/Jun/14 18:55
• Resolved: 12/Jun/14 17:28

Description

As part of my work on GORA-199 I've updated some Dictanova projects to 0.4 release (more precisly to 0.5-SNAPSHOT) for testing.

Unfortunelly, I've detected that Gora Compiler crash if there is an "enum" type field inside a record.

{
    "name": "RecordWithEnum",
    "namespace": "com.drazzib.com",
    "type": "record",
    "fields": [
        {
            "name": "type",
            "type": {
                "name": "MyEnum",
                "type": "enum",
                "symbols": [
                    "PERIOD",
                    "INSTANT"
                ]
            }
        }
    ]
}

If you try to compile this schema with Gora 0.4, you'll get the following error :

/bin/gora goracompiler record_with_enum.avsc test/
 
Compiling: record_with_enum.avsc
74 [main] ERROR AvroVelocityLogChute - ResourceManager : unable to find resource '/org/apache/gora/compiler/templates/enum.vm' in any resource loader.
Exception in thread "main" java.lang.RuntimeException: org.apache.velocity.exception.ResourceNotFoundException: Unable to find resource '/org/apache/gora/compiler/templates/enum.vm'
        at org.apache.avro.compiler.specific.SpecificCompiler.renderTemplate(SpecificCompiler.java:329)
        at org.apache.avro.compiler.specific.SpecificCompiler.compile(SpecificCompiler.java:371)
        at org.apache.avro.compiler.specific.SpecificCompiler.compileToDestination(SpecificCompiler.java:316)
        at org.apache.gora.compiler.GoraCompiler.compileSchema(GoraCompiler.java:65)
        at org.apache.gora.compiler.cli.GoraCompilerCLI.main(GoraCompilerCLI.java:56)
Caused by: org.apache.velocity.exception.ResourceNotFoundException: Unable to find resource '/org/apache/gora/compiler/templates/enum.vm'
        at org.apache.velocity.runtime.resource.ResourceManagerImpl.loadResource(ResourceManagerImpl.java:474)
        at org.apache.velocity.runtime.resource.ResourceManagerImpl.getResource(ResourceManagerImpl.java:352)
        at org.apache.velocity.runtime.RuntimeInstance.getTemplate(RuntimeInstance.java:1533)
        at org.apache.velocity.runtime.RuntimeInstance.getTemplate(RuntimeInstance.java:1514)
        at org.apache.velocity.app.VelocityEngine.getTemplate(VelocityEngine.java:373)
        at org.apache.avro.compiler.specific.SpecificCompiler.renderTemplate(SpecificCompiler.java:327)
        ... 4 more

I've managed to workaround this problem by simply dropping avro enum.vm inside gora source.

You can easily clone this gist https://gist.github.com/drazzib/35e504e6e689f96dae8f so that you can reproduce this issue.