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fb2ca4c17c
Currently we don’t know the max bound of the `pool_capacity` metric. We know `spawned` which is confusingly under the “running” keyword, however we don’t know if spawned is the highest it will possibly be. By adding `max_threads` we know the upper bound for `running` threads and therefore the upper bound for pool capacity. It should be noted that it’s not always guaranteed that puma will always create up to `max_threads`, a separate relationship between `running` and `max_threads` should be monitored as well (if min threads != max threads).
121 lines
2.7 KiB
Ruby
121 lines
2.7 KiB
Ruby
require 'puma/runner'
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require 'puma/detect'
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require 'puma/plugin'
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module Puma
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# This class is instantiated by the `Puma::Launcher` and used
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# to boot and serve a Ruby application when no puma "workers" are needed
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# i.e. only using "threaded" mode. For example `$ puma -t 1:5`
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#
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# At the core of this class is running an instance of `Puma::Server` which
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# gets created via the `start_server` method from the `Puma::Runner` class
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# that this inherits from.
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class Single < Runner
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def stats
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b = @server.backlog || 0
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r = @server.running || 0
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t = @server.pool_capacity || 0
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m = @server.max_threads || 0
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%Q!{ "backlog": #{b}, "running": #{r}, "pool_capacity": #{t}, "max_threads": #{m} }!
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end
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def restart
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@server.begin_restart
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end
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def stop
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@server.stop false
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end
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def halt
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@server.halt
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end
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def stop_blocked
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log "- Gracefully stopping, waiting for requests to finish"
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@control.stop(true) if @control
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@server.stop(true)
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end
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def jruby_daemon?
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daemon? and Puma.jruby?
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end
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def jruby_daemon_start
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require 'puma/jruby_restart'
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JRubyRestart.daemon_start(@restart_dir, @launcher.restart_args)
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end
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def run
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already_daemon = false
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if jruby_daemon?
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require 'puma/jruby_restart'
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if JRubyRestart.daemon?
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# load and bind before redirecting IO so errors show up on stdout/stderr
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load_and_bind
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redirect_io
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end
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already_daemon = JRubyRestart.daemon_init
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end
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output_header "single"
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if jruby_daemon?
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if already_daemon
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JRubyRestart.perm_daemonize
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else
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pid = nil
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Signal.trap "SIGUSR2" do
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log "* Started new process #{pid} as daemon..."
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# Must use exit! so we don't unwind and run the ensures
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# that will be run by the new child (such as deleting the
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# pidfile)
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exit!(true)
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end
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Signal.trap "SIGCHLD" do
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log "! Error starting new process as daemon, exiting"
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exit 1
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end
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jruby_daemon_start
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sleep
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end
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else
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if daemon?
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log "* Daemonizing..."
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Process.daemon(true)
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redirect_io
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end
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load_and_bind
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end
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Plugins.fire_background
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@launcher.write_state
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start_control
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@server = server = start_server
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unless daemon?
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log "Use Ctrl-C to stop"
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redirect_io
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end
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@launcher.events.fire_on_booted!
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begin
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server.run.join
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rescue Interrupt
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# Swallow it
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end
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end
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end
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end
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