using FQCN for interceptors fails

Hello Everyone,

I've been trying to write my own custom interceptor, but ran into a problem
when using a FQCN for an interceptor type. The error happens with even the
built in interceptor types when using a FQCN. Here's what the trace looks
like:

2013-06-06 14:47:18,025 (conf-file-poller-0) [ERROR -
org.apache.flume.channel.ChannelProcessor.configureInterceptors(ChannelProcessor.java:116)]
Could not instantiate Builder. Exception follows.
java.lang.InstantiationException:
org.apache.flume.interceptor.StaticInterceptor
at java.lang.Class.newInstance0(Class.java:359)
at java.lang.Class.newInstance(Class.java:327)
at
org.apache.flume.interceptor.InterceptorBuilderFactory.newInstance(InterceptorBuilderFactory.java:48)
at
org.apache.flume.channel.ChannelProcessor.configureInterceptors(ChannelProcessor.java:109)
at
org.apache.flume.channel.ChannelProcessor.configure(ChannelProcessor.java:80)
at
org.apache.flume.conf.Configurables.configure(Configurables.java:41)
at
org.apache.flume.conf.properties.PropertiesFileConfigurationProvider.loadSources(PropertiesFileConfigurationProvider.java:337)
at
org.apache.flume.conf.properties.PropertiesFileConfigurationProvider.load(PropertiesFileConfigurationProvider.java:222)
at
org.apache.flume.conf.file.AbstractFileConfigurationProvider.doLoad(AbstractFileConfigurationProvider.java:123)
at
org.apache.flume.conf.file.AbstractFileConfigurationProvider.access$300(AbstractFileConfigurationProvider.java:38)
at
org.apache.flume.conf.file.AbstractFileConfigurationProvider$FileWatcherRunnable.run(AbstractFileConfigurationProvider.java:202)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at
java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:351)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:178)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:165)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:267)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:679)
2013-06-06 14:47:18,027 (conf-file-poller-0) [ERROR -
org.apache.flume.conf.file.AbstractFileConfigurationProvider$FileWatcherRunnable.run(AbstractFileConfigurationProvider.java:204)]
Failed to load configuration data. Exception follows.
org.apache.flume.FlumeException: Interceptor.Builder not constructable.
at
org.apache.flume.channel.ChannelProcessor.configureInterceptors(ChannelProcessor.java:117)
at
org.apache.flume.channel.ChannelProcessor.configure(ChannelProcessor.java:80)
at
org.apache.flume.conf.Configurables.configure(Configurables.java:41)
at
org.apache.flume.conf.properties.PropertiesFileConfigurationProvider.loadSources(PropertiesFileConfigurationProvider.java:337)
at
org.apache.flume.conf.properties.PropertiesFileConfigurationProvider.load(PropertiesFileConfigurationProvider.java:222)
at
org.apache.flume.conf.file.AbstractFileConfigurationProvider.doLoad(AbstractFileConfigurationProvider.java:123)
at
org.apache.flume.conf.file.AbstractFileConfigurationProvider.access$300(AbstractFileConfigurationProvider.java:38)
at
org.apache.flume.conf.file.AbstractFileConfigurationProvider$FileWatcherRunnable.run(AbstractFileConfigurationProvider.java:202)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at
java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:351)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:178)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:165)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:267)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:679)
Caused by: java.lang.InstantiationException:
org.apache.flume.interceptor.StaticInterceptor
at java.lang.Class.newInstance0(Class.java:359)
at java.lang.Class.newInstance(Class.java:327)
at
org.apache.flume.interceptor.InterceptorBuilderFactory.newInstance(InterceptorBuilderFactory.java:48)
at
org.apache.flume.channel.ChannelProcessor.configureInterceptors(ChannelProcessor.java:109)
... 15 more

Thanks,
Allan