Support for upcoming script/spawner

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@1840 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

1 files changed, 62 insertions, 0 deletions

diff --git a/railties/lib/program_process.rb b/railties/lib/program_process.rb
new file mode 100644
index 0000000000..80aa95c41c
--- /dev/null
+++ b/railties/lib/program_process.rb
@@ -0,0 +1,62 @@
+class ProgramProcess
+  class << self
+    def process_keywords(action, *keywords)
+      processes = keywords.collect { |keyword| find_by_keyword(keyword) }.flatten
+
+      if processes.empty?
+        puts "Couldn't find any process matching: #{keywords.join(" or ")}"
+      else
+        processes.each do |process|
+          puts "#{action.humanize}ing #{process}"
+          process.send(action)
+        end
+      end      
+    end
+
+    def find_by_keyword(keyword)
+      process_lines_with_keyword(keyword).split("\n").collect { |line|
+        next if line.include?("inq") || line.include?("ps -ax") || line.include?("grep")
+        pid, *command = line.split
+        new(pid, command.join(" "))
+      }.compact
+    end
+
+    private
+      def process_lines_with_keyword(keyword)
+        `ps -ax -o 'pid command' | grep #{keyword}`
+      end
+  end
+
+  def initialize(pid, command)
+    @pid, @command = pid, command
+  end
+
+  def find
+  end
+
+  def reload
+    `kill -s HUP #{@pid}`
+  end
+  
+  def restart
+    kill
+    `#{@command}`
+  end
+
+  def graceful_restart
+    graceful_kill
+    `#{@command}`
+  end
+
+  def graceful_kill
+    `kill -s TERM #{@pid}`
+  end
+
+  def kill
+    `kill -9 #{@pid}`
+  end
+
+  def to_s
+    "[#{@pid}] #{@command}"
+  end
+end
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