Added a new interface that allows the worker to prioritize which lease
assignment it will work on next. When using the
ParentsFirstshardprioritization the worker will select parents for
processing before selecting children. This will prevent ShardConsumers
from spending time sleeping in the WAITING_ON_PARENT_SHARDS state.
Added support for time based iterators. Time based iterators are only
used if there is no current checkpoint for that shard, otherwise the
sequence number of the checkpoint is used.
The test 'testWorkerForcefulShutdown' was using Thread.sleep() to create
the conditions for an interrupted state. It was possible for the test
to take enough time for the sleep to actually exit before the interrupt
was sent. This would cause the test to fail. Changing to a pair of
sempahores ensures that the test record processor will remain blocked
for the expected amount of time.
Added unit tests for many of the classes in the client. Added new
dependencies for the unit tests to the POM file. Unit tests can be
executed the `surefire:test` goal, and are executed during the test phase.
Added integration tests for the client. The tests require access to
credentials that can interact with Kinesis, and DynamoDB. The
integration tests can be run by executing the
`failsafe:integration-test` goal, or are run as part of the
integration-test phase
**Resources in the integration tests are not currently released on
completion of the integration tests.**
