RFR: 8262908: JFR: Allow JFR to stream events from a known repository path [v2]

[Erik Gahlin]

> Hi,
> 
> Could I have a review that makes it possible to use event streaming against the repository specified on command line (-XX:FlightRecorder:repository=directory)
> 
> This is useful if you want start JFR from a script and pass the directory to a monitoring process. Previously you had to use attach and read the directory from a system property. 
> 
> Testing: jdk/jdk/jfr
> 
> Thanks
> Erik

Erik Gahlin has updated the pull request incrementally with one additional commit since the last revision:

  Remove mistakenly added file

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/3685/files
  - new: https://git.openjdk.java.net/jdk/pull/3685/files/39bc9952..dcdd01d9

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=3685&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=3685&range=00-01

  Stats: 432 lines in 1 file changed: 0 ins; 432 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3685.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3685/head:pull/3685

PR: https://git.openjdk.java.net/jdk/pull/3685