Module: Evilution::ParallelDbWarning

Defined in:
lib/evilution/parallel_db_warning.rb

Overview

EV-kdns / GH #817: nudge users running parallel jobs against SQLite to adopt the parallel_tests convention. WorkQueue sets TEST_ENV_NUMBER per worker, but that only helps if config/database.yml interpolates it into the database path. Without per-worker DB files, concurrent workers pile up on one SQLite file and surface ActiveRecord::StatementTimeout / SQLite3::BusyException — noise that MutationExecutor demotes to :neutral but still wastes wall-clock time.

Constant Summary collapse

DATABASE_YML = 
File.join("config", "database.yml")
MESSAGE = 
"[evilution] Parallel run (jobs > 1) detected with SQLite in " \
"config/database.yml. Interpolate ENV['TEST_ENV_NUMBER'] into the " \
"test database path for per-worker DB isolation. See README."

Class Method Summary collapse

Class Method Details

.reset! ⇒ Object 



36
37
38
 
# File 'lib/evilution/parallel_db_warning.rb', line 36

def reset!
  @mutex.synchronize { @warned_roots.clear }
end

.warn_if_sqlite_parallel(config, output: $stderr, root: Dir.pwd) ⇒ Object 



23
24
25
26
27
28
29
30
31
32
33
34
 
# File 'lib/evilution/parallel_db_warning.rb', line 23

def warn_if_sqlite_parallel(config, output: $stderr, root: Dir.pwd)
  return unless config.jobs > 1
  return unless sqlite_in_test_config?(root)

  @mutex.synchronize do
    return if @warned_roots[root]

    @warned_roots[root] = true
  end

  output.puts(MESSAGE)
end