Class: Spider::TemplateCache
Instance Method Summary
collapse
Methods included from Logger
add, close, close_all, datetime_format, datetime_format=, #debug, debug, debug?, #debug?, enquire_loggers, #error, error, #error?, error?, #fatal, fatal, #fatal?, fatal?, info, #info, info?, #info?, method_missing, open, reopen, send_to_loggers, unknown, #unknown, #warn, warn, warn?, #warn?
Constructor Details
Returns a new instance of TemplateCache.
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# File 'lib/spiderfw/cache/template_cache.rb', line 10
def initialize(root_path)
FileUtils.mkpath(root_path)
@path = root_path
@invalid = {}
end
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Instance Method Details
#fetch(path, &block) ⇒ Object
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# File 'lib/spiderfw/cache/template_cache.rb', line 16
def fetch(path, &block)
return refresh(path, &block) unless fresh?(path)
return load_cache(path)
end
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#fresh?(path) ⇒ Boolean
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# File 'lib/spiderfw/cache/template_cache.rb', line 26
def fresh?(path)
full_path = get_location(path)
if Spider.config.get('template.cache.disable')
Spider::Request.current[:compiled_templates] ||= {}
return true if Spider::Request.current[:compiled_templates][full_path]
return false
end
exists = File.exist?(full_path)
if (Spider.config.get('template.cache.no_check') && exists)
return true
end
return false if @invalid[path]
global_reload_file = "#{Spider.paths[:tmp]}/templates_reload.txt"
check_file = "#{full_path}/check"
return false unless File.exist?(check_file)
if (File.exist?("#{Spider.paths[:tmp]}/templates_reload.txt"))
return false if (File.mtime(global_reload_file) > File.mtime(check))
end
return true unless Spider.conf.get('template.cache.check_files')
lock_file = File.new(full_path)
lock_file.flock(File::LOCK_SH)
File.new(full_path).flock(File::LOCK_SH)
Marshal.load(IO.read(check_file)).each do |check, time|
return false if File.mtime(check) > time
end
lock_file.flock(File::LOCK_UN)
return true
end
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#get_compiled_template(path) ⇒ Object
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# File 'lib/spiderfw/cache/template_cache.rb', line 70
def get_compiled_template(path)
compiled = Spider::CompiledTemplate.new
compiled.cache_path = path
init_code = IO.read(path+'/init.rb')
run_code = IO.read(path+'/run.rb')
compiled.assets = Marshal.load(IO.read(path+'/assets'))
block = Spider::TemplateBlocks::CompiledBlock.new(init_code, run_code)
compiled.block = block
Dir.new(path).each do |entry|
next if entry[0].chr == '.'
sub_path = "#{path}/#{entry}"
next if entry == '__info'
next unless File.directory?(sub_path)
compiled.subtemplates[entry] = get_compiled_template(sub_path)
end
return compiled
end
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#get_location(path, &block) ⇒ Object
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# File 'lib/spiderfw/cache/template_cache.rb', line 21
def get_location(path, &block)
refresh(path, &block) if (block && !fresh?(path))
return @path+'/'+path
end
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#invalidate(path) ⇒ Object
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# File 'lib/spiderfw/cache/template_cache.rb', line 59
def invalidate(path)
@invalid[path] = true
end
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#load_cache(template_path) ⇒ Object
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# File 'lib/spiderfw/cache/template_cache.rb', line 88
def load_cache(template_path)
full_path = get_location(template_path)
lock_file = File.new(full_path)
lock_file.flock(File::LOCK_SH)
compiled = get_compiled_template(full_path)
lock_file.flock(File::LOCK_UN)
return compiled
end
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#refresh(path, &block) ⇒ Object
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# File 'lib/spiderfw/cache/template_cache.rb', line 63
def refresh(path, &block)
res = block.call()
write_cache(path, res)
return res
end
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#write_cache(template_path, compiled_template) ⇒ Object
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# File 'lib/spiderfw/cache/template_cache.rb', line 127
def write_cache(template_path, compiled_template)
full_path = get_location(template_path)
FileUtils.mkpath(full_path)
lock_file = File.new(full_path+'/lock', 'w')
lock_file.flock(File::LOCK_EX)
write_compiled_template(compiled_template, full_path)
modified = compiled_template.collect_mtimes
File.open(full_path+'/check', 'w') do |file|
file.puts(Marshal.dump(modified))
end
lock_file.flock(File::LOCK_UN)
end
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#write_compiled_template(compiled, path) ⇒ Object
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# File 'lib/spiderfw/cache/template_cache.rb', line 98
def write_compiled_template(compiled, path)
compiled.cache_path = path
File.open(path+'/init.rb', 'w') do |file|
file.puts(compiled.block.init_code)
end
File.open(path+'/run.rb', 'w') do |file|
file.puts(compiled.block.run_code)
end
File.open(path+'/assets', 'w') do |file|
file.puts(Marshal.dump(compiled.assets))
end
compiled.subtemplates.each do |id, sub|
sub_path = "#{path}/#{id}"
FileUtils.mkpath(sub_path)
write_compiled_template(sub, sub_path)
end
compiled.devel_info.each do |name, val|
FileUtils.mkpath("#{path}/__info")
sub_path = "#{path}/__info/#{name}"
File.open(sub_path, 'w') do |f|
f.puts(val)
end
end
if Spider.config.get('template.cache.disable')
Spider::Request.current[:compiled_templates] ||= {}
Spider::Request.current[:compiled_templates][path] = true
end
end
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