- Eliminate reduncancy of filter application.
- Track filter metrics per-shard to facitate per merging.
- Flatten counting iterator hierarchy for easier debugging.
- Rename Reads class to ReadProperties and track it outside of the Sting iterators.
Note: because shards are currently tied so closely to reads and not the merged triplet of <reads,ref,RODs>, the metrics
classes are managed by the SAMDataSource when they should be managed by something more general. For now, we're hacking
the reads data source to manage the metrics; in the future, something more general should manage the metrics classes.
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the walker itself, but didn't do a great job of catching framework exceptions. This became extremely
unfortunate in the case where walkers caused exceptions that manifested themselves in the framework,
such as when the walker opens more files than file handles are available.
Reworked the exception handling so that framework errors are treated like walker errors and the resulting
exception bubbles out of the walker. Stack traces for threaded walkers are still convoluted and nasty.
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simplification of some of the locus traversal code.
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-Needs more comprehensive unit testing.
-Needs some basic refactoring.
-Needs rethink of interface boundaries.
-Needs to play more nicely in the /tmp sandbox.
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