[REEF-1404] Move IMRU Task state to Context

  * Define ITaskState interface in IMRU and default implementation
  * Define MapTaskState and UpdateTaskState in IMRU example
  * Modify IMRU JobDefinition and IMRUJobDefinitionBuilder to all the task state
    to be configured
  * Modify ConfigurationManager for managing updateTaskStateConfiguration and
    mapTaskStateConfiguration
  * Modify ServiceAndContextConfigurationProvider to set the service and state
    configurations
  * Add TaskStateService to bind it to context for holding ITaskState instance
  * Change Update and map function in IMRU example and test to save and restore
    the state

JIRA:
  [REEF-1404](https://issues.apache.org/jira/browse/REEF-1404)

Pull Request:
  This closes #1131
27 files changed
tree: 20e500ee1043cb232b554620063727ab65b9b28e
  1. bin/
  2. dev/
  3. lang/
  4. website/
  5. .gitattributes
  6. .gitignore
  7. .travis.yml
  8. appveyor.yml
  9. Doxyfile
  10. HEADER
  11. LICENSE
  12. NOTICE
  13. pom.xml
  14. README.md
README.md

Apache REEF™

Apache REEF™ (Retainable Evaluator Execution Framework) is a library for developing portable applications for cluster resource managers such as Apache Hadoop YARN or Apache Mesos. For example, Microsoft Azure Stream Analytics is built on REEF and Hadoop.

Online Documentation

Detailed information on REEF can be found in the following places:

The developer mailing list is the best way to reach REEF‘s developers when the above aren’t sufficient.

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Apache 2.0