Add experimental support for Pumaan-multithreading

This allows us (and others) to test drive Puma without it affecting all
users. Puma can be enabled by setting the environment variable
"EXPERIMENTAL_PUMA" to a non empty value.

2 files changed, 68 insertions, 0 deletions

diff --git a/bin/web b/bin/web
index ecd0bbd10b0..06ff7c39296 100755
--- a/bin/web
+++ b/bin/web
@@ -3,6 +3,11 @@
 cd $(dirname $0)/..
 app_root=$(pwd)
 
+# Switch to experimental PUMA configuration
+if [ -n "${EXPERIMENTAL_PUMA}" ]; then
+  exec bin/web_puma "$@"
+fi
+
 unicorn_pidfile="$app_root/tmp/pids/unicorn.pid"
 unicorn_config="$app_root/config/unicorn.rb"
 unicorn_cmd="bundle exec unicorn_rails -c $unicorn_config -E $RAILS_ENV"
diff --git a/bin/web_puma b/bin/web_puma
new file mode 100755
index 00000000000..178fe84800d
--- /dev/null
+++ b/bin/web_puma
@@ -0,0 +1,63 @@
+#!/bin/sh
+
+set -e
+
+cd $(dirname $0)/..
+app_root=$(pwd)
+
+puma_pidfile="$app_root/tmp/pids/puma.pid"
+puma_config="$app_root/config/puma.rb"
+
+spawn_puma()
+{
+  exec bundle exec puma --config "${puma_config}" "$@"
+}
+
+get_puma_pid()
+{
+  pid=$(cat "${puma_pidfile}")
+  if [ -z "$pid" ] ; then
+    echo "Could not find a PID in $puma_pidfile"
+    exit 1
+  fi
+  echo "${pid}"
+}
+
+start()
+{
+  spawn_puma -d
+}
+
+start_foreground()
+{
+  spawn_puma
+}
+
+stop()
+{
+  get_puma_pid
+  kill -QUIT "$(get_puma_pid)"
+}
+
+reload()
+{
+  kill -USR2 "$(get_puma_pid)"
+}
+
+case "$1" in
+  start)
+    start
+    ;;
+  start_foreground)
+    start_foreground
+    ;;
+  stop)
+    stop
+    ;;
+  reload)
+    reload
+    ;;
+  *)
+    echo "Usage: RAILS_ENV=your_env $0 {start|stop|reload}"
+    ;;
+esac