Class: MuninManager::Plugins::RailsResponseTime
Instance Attribute Summary collapse
Attributes inherited from LogReader
#file_name, #me, #state_dir, #state_file
Class Method Summary
collapse
Instance Method Summary
collapse
included
Methods inherited from LogReader
#collect!, #load_saved_state, #save_state
Constructor Details
#initialize(log_file, options = {}) ⇒ RailsResponseTime
Returns a new instance of RailsResponseTime.
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# File 'lib/munin_manager/plugins/rails_response_time.rb', line 6
def initialize(log_file, options = {})
super(log_file)
@search_pattern = options[:search_pattern] || /.*/
@search_pattern = Regexp.new(@search_pattern) if @search_pattern.is_a?(String)
end
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Instance Attribute Details
#search_pattern ⇒ Object
Returns the value of attribute search_pattern.
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# File 'lib/munin_manager/plugins/rails_response_time.rb', line 4
def search_pattern
@search_pattern
end
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Class Method Details
.help_text(options = {}) ⇒ Object
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# File 'lib/munin_manager/plugins/rails_response_time.rb', line 78
def self.help_text(options = {})
%Q{
#{plugin_name.capitalize} Munin Plugin
===========================
Please remember to add something like the lines below to /etc/munin/plugin-conf.d/munin-node
if the rails log file is not at /var/log/rails.log
[#{options[:symlink] || plugin_name}]
env.log_file /var/log/custom/rails.log
env.search_pattern UsersController.*
Also, make sure that the '/var/lib/munin/plugin-state' is writable by munin.
$ sudo chmod 777 /var/lib/munin/plugin-state
}
end
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.run ⇒ Object
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# File 'lib/munin_manager/plugins/rails_response_time.rb', line 64
def self.run
log_file = ENV['log_file'] || "/var/log/rails.log"
allowed_commands = ['config']
rails = new(log_file, :search_pattern => ENV['search_pattern'])
if cmd = ARGV[0] and allowed_commands.include? cmd then
puts rails.send(cmd.to_sym)
else
rails.collect!
puts rails.values
end
end
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Instance Method Details
#config ⇒ Object
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# File 'lib/munin_manager/plugins/rails_response_time.rb', line 40
def config
configs = {
"graph_title" => "Rails Response Times (by Controller->Action)",
"graph_vlabel" => "time (secs)",
"graph_category" => "Performance",
"graph_args" => "--upper-limit 1.0 --lower-limit 0.100 --rigid"
}
self.collect!(:save_state => false)
self.data.each do |action_name, respose_time|
configs["#{format_for_munin(action_name)}.label"] = action_name.sub("#", "->")
configs["#{format_for_munin(action_name)}.draw"] = "LINE2"
end
configs["graph_order"] = self.data.to_a.
sort {|lhs, rhs| rhs[1] <=> lhs[1]}.
collect {|tuple| format_for_munin(tuple[0])}
configs.map {|key_value_pair| key_value_pair.join(" ")}.join("\n")
end
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#data ⇒ Object
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# File 'lib/munin_manager/plugins/rails_response_time.rb', line 12
def data
@data ||= Hash.new {|h, k| h[k] = Array.new}
end
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#process! ⇒ Object
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# File 'lib/munin_manager/plugins/rails_response_time.rb', line 34
def process!
data.each_pair do |action_name, response_times|
data[action_name] = response_times.inject(0) {|sum, i| sum + i} / data[action_name].length rescue 0
end
end
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#scan(log_file) ⇒ Object
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# File 'lib/munin_manager/plugins/rails_response_time.rb', line 16
def scan(log_file)
current_action = nil
loop do
line = log_file.readline
if line.starts_with?("Processing ")
cols = line.split(/\s+/)
current_action = cols[1] if self.search_pattern.match(cols[1])
elsif line.starts_with?("Completed in ") && !current_action.nil?
cols = line.split(/\s+/)
data[current_action] << cols[2].to_f
current_action = nil
end
end
end
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#values ⇒ Object
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# File 'lib/munin_manager/plugins/rails_response_time.rb', line 60
def values
data.map {|k, v| "#{format_for_munin(k)}.value #{"%.10f" % v}"}.join("\n")
end
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