Class: ArchivesSpaceThreadDump

Inherits:
Object
  • Object
show all
Defined in:
common/archivesspace_thread_dump.rb

Class Method Summary collapse

Class Method Details

.init(status_file_path) ⇒ Object 



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# File 'common/archivesspace_thread_dump.rb', line 12

def self.init(status_file_path)
  $stderr.puts("\n#{self}: Touch the file '#{status_file_path}' to trigger a thread dump")

  Thread.new do
    begin
      watcher = java.nio.file.FileSystems.getDefault().newWatchService()

      status_file_path = File.absolute_path(status_file_path)
      dir = java.nio.file.Paths.get(File.dirname(status_file_path))

      dir.register(watcher,
                   java.nio.file.StandardWatchEventKinds::ENTRY_CREATE)

      loop do
        key = watcher.take

        key.poll_events.each do |event|
          # Cast both to Path objects to normalize between '/' and '\\' on win32
          if dir.resolve(event.context).to_string == java.nio.file.Paths.get(status_file_path).to_string
            begin
              ArchivesSpaceThreadDump.print_dump
            rescue
              $stderr.puts("Problem while printing thread dump: #{$!}")
            end

            File.unlink(status_file_path)
          end
        end

        unless key.reset
          raise "Key reset failed"
        end
      end
    rescue
      $stderr.puts "Failure in #{self} handler for path #{status_file_path}: #{$!}"
      $stderr.puts($@)
    end
  end
end

.print_dump ⇒ Object 



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# File 'common/archivesspace_thread_dump.rb', line 52

def self.print_dump
  $stderr.puts("[#{Time.now.to_i}] Starting Ruby-level thread dump")
  $stderr.puts("=" * 72)

  Thread.list.each do |thread|
    $stderr.puts("\n")
    $stderr.puts(thread.inspect)
    thread.backtrace.each do |frame|
      $stderr.puts("  #{frame}")
    end
  end

  $stderr.puts("")

  $stderr.puts("[#{Time.now.to_i}] Starting JVM-level thread dump")
  $stderr.puts("=" * 72)

  java.lang.Thread.all_stack_traces.each do |thread, frames|
    $stderr.puts("\n")
    $stderr.puts("\"#{thread.name}\"")
    frames.each do |frame|
      $stderr.puts("  #{frame}")
    end
  end

  $stderr.puts("")
  $stderr.puts("==== End of thread dump ====")
end