Module: JvmwatcherUtil

Defined in:
lib/fluent/plugin/jvmwatcher_util.rb

Overview

A Java VM status Watcher for Fluent

Copyright © 2013 Masayuki Miyake

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

Constant Summary collapse

SetEnvFileName = 
"setEnvWatcher.sh"
Log4JFileName = 
"log4j.xml"
SetEnvTemplateFileName = 
"setEnv.sh.template"
Log4JTemplateFileName = 
"log4j.xml.template"
BinDirName = 
"bin"
LibDirName = 
"lib"
ConfigDirName = 
"config"
LogDirName = 
"log"

Class Method Summary collapse

Class Method Details

.find_filter_config_path(config_path) ⇒ Object 



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# File 'lib/fluent/plugin/jvmwatcher_util.rb', line 125

def find_filter_config_path (config_path)

  # check nil
  return "NO_CONFIG" unless config_path

  unless File.file?(config_path)

    path = find_watcher_java_path(ConfigDirName)
    config_path = File.join(path, config_path)
    config_path = "NO_CONFIG" unless File.file?(config_path)

  end

  return config_path
end

.find_watcher_java_path(dir_name, file_name = nil) ⇒ Object 



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# File 'lib/fluent/plugin/jvmwatcher_util.rb', line 30

def find_watcher_java_path (dir_name, file_name = nil)

  java_path = nil

  # find java command path
  $LOAD_PATH.map do |load_path|
    path = File.join(load_path, "fluent/plugin")  # make fluentd plugin path
    if File.directory?(path)

      # find target java directory
      path_name = "#{path}/jvmwatcher/#{dir_name}"
      
      next unless File.directory?(path_name)  # chech directory

      if file_name
        # check file
        java_path = File.join(path_name, file_name)
        java_path = nil unless File.file?(java_path)
      else
        java_path = path_name
      end

      break if java_path
    end
  end

  return java_path
end

.make_log4j_file ⇒ Object 



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# File 'lib/fluent/plugin/jvmwatcher_util.rb', line 94

def make_log4j_file

  template_path = find_watcher_java_path(ConfigDirName, Log4JTemplateFileName)
  output_path = find_watcher_java_path(ConfigDirName)
  log_path = find_watcher_java_path(LogDirName)

  # path nil check
  return nil unless template_path
  return nil unless output_path
  return nil unless log_path

  output_path = File.join(output_path, Log4JFileName)
  # make setEnvWatcher.sh
  temp_io = File.open(template_path, "r")
  env_io = File.open(output_path, "w")

  temp_io.each do |line|
    line.chomp!
    line = line.gsub(/\[LOG_PATH\]/, log_path)

    env_io.puts(line)
  end

  temp_io.close
  env_io.close 

  return output_path

end

.make_setenv_file ⇒ Object 



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# File 'lib/fluent/plugin/jvmwatcher_util.rb', line 60

def make_setenv_file

  template_path = find_watcher_java_path(BinDirName, SetEnvTemplateFileName)
  output_path = find_watcher_java_path(BinDirName)
  lib_path = find_watcher_java_path(LibDirName)
  config_path = find_watcher_java_path(ConfigDirName)

  # path nil check
  return nil unless template_path
  return nil unless output_path
  return nil unless lib_path
  return nil unless config_path

  output_path = File.join(output_path, SetEnvFileName)
  # make setEnvWatcher.sh
  temp_io = File.open(template_path, "r")
  env_io = File.open(output_path, "w")

  temp_io.each do |line|
    line.chomp!
    line = line.gsub(/\[LIB_PATH\]/, lib_path)
    line = line.gsub(/\[CONFIG_PATH\]/, config_path)

    env_io.puts(line)
  end

  temp_io.close
  env_io.close 

  return output_path

end