[#MAPREDUCE-506] make HistoryViewer a public class.

Hadoop Map/Reduce

Created: 29/Jul/08 05:40 AM Updated: 07/Oct/09 05:59 AM

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This issue relates to:

HADOOP-4559 Rest API for retrieving job / task statistics

Resolution Date:

07/Oct/09 05:59 AM

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org.apache.hadoop.mapred.HistoryViewer is useful to access Job history files from application code. The class can be made public.

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Paco Nathan added a comment - 29/Jul/08 06:13 AM

Currently this is not written as a public class, which makes it difficult to use inside application code.

This kind of summary analysis about jobs is quite useful to access from within the application, for performance testing and cost modeling.

Another change would be to have getters for many of the calculated values, instead of printing them.

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Fixed by ~~MAPREDUCE-157~~