Class: Appstats::LogCollector

Inherits:
ActiveRecord::Base
  • Object
show all
Defined in:
lib/appstats/log_collector.rb

Constant Summary collapse

@@downloaded_log_directory = 
nil

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.download_remote_files(raw_logins) ⇒ Object 



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# File 'lib/appstats/log_collector.rb', line 91

def self.download_remote_files(raw_logins)
  all = LogCollector.where("status = 'unprocessed'").all
  if all.empty?
    Appstats.log(:info,"No remote logs to download.")
    return 0
  end

  normalized_logins = normalize_logins(raw_logins)
  count = 0
  
  Appstats.log(:info,"About to download #{all.size} file(s).")
  all.each do |log_collector|
    host = log_collector.host
    user = normalized_logins[host][:user]
    password = normalized_logins[host][:password]
    begin
      Net::SCP.start( host, user, :password => password ) do |scp|
        scp.download!( log_collector.filename, log_collector.calculated_local_filename )
      end
    rescue Exception => e
      Appstats.log(:error,"Something bad occurred during Appstats::LogCollector#download_remote_files")
      Appstats.log(:error,e.message)
    end
    if File.exists?(log_collector.calculated_local_filename)
      log_collector.local_filename = log_collector.calculated_local_filename
      log_collector.status = 'downloaded'
      Appstats.log(:info,"  - #{user}@#{host}:#{log_collector.filename} > #{log_collector.local_filename}")
      count += 1  
    else
      Appstats.log(:error, "File #{log_collector.calculated_local_filename} did not download.")
      log_collector.status = 'failed_download'
    end
    log_collector.save
  end
  Appstats.log(:info,"Downloaded #{count} file(s).")
  count
end

.downloaded_log_directory ⇒ Object 



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# File 'lib/appstats/log_collector.rb', line 43

def self.downloaded_log_directory
  @@downloaded_log_directory
end

.downloaded_log_directory=(value) ⇒ Object 



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# File 'lib/appstats/log_collector.rb', line 39

def self.downloaded_log_directory=(value)
  @@downloaded_log_directory = value
end

.find_remote_files(remote_login, path, log_template) ⇒ Object 



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# File 'lib/appstats/log_collector.rb', line 52

def self.find_remote_files(,path,log_template)
  begin
    Appstats.log(:info,"Looking for logs in [#{[:user]}@#{[:host]}:#{path}] labelled [#{log_template}]")
    Net::SSH.start([:host], [:user], :password => [:password] ) do |ssh|
      raw_files = ssh.exec!("cd #{path} && ls -tr | grep #{log_template} | grep -v __processed__") 
      all_files = raw_files.nil? ? [] : raw_files.split
      load_remote_files(,path,all_files)
    end
  rescue Exception => e
    Appstats.log(:error,"Something bad occurred during Appstats::LogCollector#find_remote_files")
    Appstats.log(:error,e.message)
    0
  end
end

.load_remote_files(remote_login, path, all_files) ⇒ Object 



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# File 'lib/appstats/log_collector.rb', line 67

def self.load_remote_files(,path,all_files)
  if all_files.empty?
    Appstats.log(:info,"No remote logs to load.")
    return 0
  end

  count = 0
  Appstats.log(:info, "About to analyze #{all_files.size} file(s).")
  all_files.each do |log_name|
    filename = File.join(path,log_name)
    if !log_name.match("(.*)#{Time.now.strftime('%Y-%m-%d')}.log").nil?
      Appstats.log(:info, "  - IGNORING CURRENT LOG FILE #{[:user]}@#{[:host]}:#{filename}")
    elsif LogCollector.find_by_host_and_filename([:host],filename).nil?
      log_collector = LogCollector.create(:host => [:host], :filename => filename, :status => "unprocessed")
      Appstats.log(:info, "  - #{[:user]}@#{[:host]}:#{filename}")
      count += 1
    else
      Appstats.log(:info, "  - ALREADY LOADED #{[:user]}@#{[:host]}:#{filename}")
    end
  end
  Appstats.log(:info, "Loaded #{count} file(s).")
  count
end

.normalize_logins(raw_logins) ⇒ Object 



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# File 'lib/appstats/log_collector.rb', line 195

def self.normalize_logins(raw_logins)
  normalized_logins = {}
  raw_logins.each do ||
    normalized_logins[[:host]] = 
  end
  normalized_logins
end

.process_local_files ⇒ Object 



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# File 'lib/appstats/log_collector.rb', line 129

def self.process_local_files
  all = LogCollector.where("status = 'downloaded'").all
  if all.empty?
    Appstats.log(:info,"No local logs to process.")
    return 0
  end
  Appstats.log(:info,"About to process #{all.size} file(s).")
  count = 0
  total_entries = 0
  all.each do |log_collector|
    current_entries = 0
    begin
      File.open(log_collector.local_filename,"r").readlines.each do |line|
        entry = Entry.create_from_logger_string(line.strip)
        entry.log_collector = log_collector
        entry.save
        current_entries += 1
        total_entries += 1
      end
      Appstats.log(:info,"  - #{current_entries} entr(ies) in #{log_collector.local_filename}.")
      log_collector.status = "processed"
      log_collector.save
      count += 1
    rescue Exception => e
      Appstats.log(:error,"Something bad occurred during Appstats::LogCollector#process_local_files")
      Appstats.log(:error,e.message)
    end
  end
  Appstats.log(:info,"Processed #{count} file(s) with #{total_entries} entr(ies).")
  count
end

.remove_remote_files(raw_logins) ⇒ Object 



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# File 'lib/appstats/log_collector.rb', line 161

def self.remove_remote_files(raw_logins)
  all = LogCollector.where("status = 'processed'").all
  if all.empty?
    Appstats.log(:info,"No remote logs to remove.")
    return 0
  end
  
  normalized_logins = normalize_logins(raw_logins)
  
  count = 0
  Appstats.log(:info,"About to remove #{all.size} remote file(s) from the processing queue.")
  all.each do |log_collector|
    host = log_collector.host
    
    if normalized_logins[host].nil?
      Appstats.log(:info,"  - Missing host login details [#{host}], unable to remove #{log_collector.processed_filename}")
      next
    end
    
    user = normalized_logins[host][:user]
    password = normalized_logins[host][:password]

    Net::SSH.start(host, user, :password => password ) do |ssh|
     ssh.exec!("mv #{log_collector.filename} #{log_collector.processed_filename}")
     Appstats.log(:info,"  - #{user}@#{host}:#{log_collector.processed_filename}")
     log_collector.status = "destroyed"
     log_collector.save
     count += 1
    end
  end
  Appstats.log(:info,"Removed #{count} remote file(s).")
  count
end

.should_process(last_time) ⇒ Object 



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# File 'lib/appstats/log_collector.rb', line 47

def self.should_process(last_time)
  return true if last_time.nil?
  Time.now.day > last_time.day
end

Instance Method Details

#calculated_local_filename ⇒ Object 



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# File 'lib/appstats/log_collector.rb', line 13

def calculated_local_filename
  if Appstats::LogCollector.downloaded_log_directory.nil?
    File.expand_path("#{File.dirname(__FILE__)}/../../log/appstats_remote_log_#{id}.log")
  else
    File.expand_path("#{Appstats::LogCollector.downloaded_log_directory}/appstats_remote_log_#{id}.log")
  end
end

#processed_filename ⇒ Object 



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# File 'lib/appstats/log_collector.rb', line 21

def processed_filename
  return filename if filename.nil? || filename == ''
  m = filename.match(/(.*\/)(.*)/)
  prefix = "__processed__"
  return "#{prefix}#{filename}" if m.nil?
  "#{m[1]}#{prefix}#{m[2]}"
end

#unprocess_entries ⇒ Object 



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# File 'lib/appstats/log_collector.rb', line 29

def unprocess_entries
  return false unless ["processed","destroyed"].include?(status)
  entries.each do |entry|
    entry.destroy
  end
  self.status = "downloaded"
  save
  true
end