pause mechanism added

[ucwong]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 11.76471% with 15 lines in your changes are missing coverage. Please review.

Project coverage is 28.55%. Comparing base (000c9dc) to head (caeabd6).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #441      +/-   ##
==========================================
- Coverage   28.59%   28.55%   -0.04%     
==========================================
  Files          47       47              
  Lines        3655     3667      +12     
==========================================
+ Hits         1045     1047       +2     
- Misses       2519     2529      +10     
  Partials       91       91              

Files	Coverage Δ
backend/caffe/t.go	44.36% <0.00%> (+0.65%)	⬆️
backend/handler.go	32.39% <12.50%> (-0.43%)	⬇️

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