Class: ExtremeZip
- Inherits:
-
Object
- Object
- ExtremeZip
- Defined in:
- lib/extremezip.zzaqsv.rb
Overview
def checkMemoryUsage
Instance Method Summary collapse
-
#addBasicFileInformation ⇒ Object
加入基本文件信息.
-
#appendVfsDataList(victoriaFresh) ⇒ Object
追加压缩块列表数据。.
-
#compressInSubProcess(currentBlockData, currentResponsePipe) ⇒ Object
在子进程中具体执行的压缩代码.
-
#compressVfsMenu(victoriaFresh) ⇒ Object
压缩目录数据。.
-
#exz(rootPath) ⇒ Object
压缩.
-
#initialize ⇒ ExtremeZip
constructor
A new instance of ExtremeZip.
-
#launchSubProcesses ⇒ Object
启动子进程。.
-
#loadStamp(rootPath) ⇒ Object
writeStamp # 更新时间戳文件.
-
#readBlockFile(filePartCounter) ⇒ Object
读取块文件内容.
-
#receiveCompressedVfsDataList(processIdList, responsePipeList) ⇒ Object
接收压缩后的数据块列表.
-
#receiveFromSubProcess(currentSubProcess, responsePipeList, processCounter) ⇒ Object
从子进程中读取数据,并终止子进程.
-
#reportRememberOneFileNode(victoriaFresh, parentPath) ⇒ Object
process one file node.
-
#reportTopLargeFileList(victoriaFresh) ⇒ Object
report top large file list.
-
#schedule1Block(filePartCounter) ⇒ Object
计划一个块的压缩计算.
-
#writeCompressBlock(compressed, processCounter) ⇒ Object
写入压缩块文件.
-
#writeFile(wholeFileContent, victoriaFresh) ⇒ Object
写入文件内容.
-
#writeStamp(rootPath) ⇒ Object
addBasicFileInformation # 加入基本文件信息.
Constructor Details
#initialize ⇒ ExtremeZip
Returns a new instance of ExtremeZip.
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# File 'lib/extremezip.zzaqsv.rb', line 20 def initialize @wholeCbor = {} # 整个CBOR结构 @vfsDataList = [] # 数据块压缩块列表 @filePartCounter = 0 # 文件分块计数器 @responsePipeList = [] # 任务回复管道列表 @processIdList = [] # 子进程编号列表。 @processTimestamp = Time.new.to_i # 记录进程启动的时间戳。 @topFileList=[] # top file list. by length. @maxSubProcessAmount = Etc.nprocessors # 获取最大的子进程个数 @leastTopFileLength=-4 # least top file length @dataBlockLength = 33554432 # 数据块单元长度, 32MiB @clipDownloader = VictoriaFresh.new # 创建下载器。 @clipDownloader.diskFlush = true # 向磁盘写入缓存 @clipDownloader.diskMultiFile = true # 写多个磁盘文件 @clipDownloader.diskFileName = 'victoriafreshdata.v.' # 磁盘文件名前缀 @clipDownloader.diskFlushSize = @dataBlockLength # 磁盘文件大小 @clipDownloader.ignoreFileName= '.exzignore' # 设置用于指定忽略文件列表的文件名。 end |
Instance Method Details
#addBasicFileInformation ⇒ Object
加入基本文件信息
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# File 'lib/extremezip.zzaqsv.rb', line 118 def addBasicFileInformation @wholeCbor['version'] = 251 # 文件格式版本号 uuid = UUID.new # 获取生成器 @wholeCbor['uuid'] = uuid.generate # 指定本个压缩包的唯一编号 @wholeCbor['website']='https://rubygems.org/gems/EXtremeZip' # 加入网站地址 @wholeCbor['vfsDataListStart']=198910 # 压缩 VFS 数据列表起始位置。 end |
#appendVfsDataList(victoriaFresh) ⇒ Object
追加压缩块列表数据。
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# File 'lib/extremezip.zzaqsv.rb', line 259 def appendVfsDataList (victoriaFresh) extremeZipOutputFile = File.new("#{victoriaFresh['name']}.exz", 'ab') # 打开文件 processCounter=0 # 块计数器。 @wholeCbor['vfsDataList'].each do #extremeZipOutputFile = File.new("comressed.#{processCounter}.cex", 'wb') # 创建文件 currentBlockFile = File.new("comressed.#{processCounter}.cex", 'rb') # 打开文件 wholeFileContent = currentBlockFile.read # 读取全部内容 currentBlockFile.close # 关闭文件 File.delete(currentBlockFile) # 删除数据块文件 #wholeFileContent=File.read("comressed.#{processCounter}.cex", 'rb') # 读取压缩块。 #puts "wirte file contetn length: #{wholeFileContent.length}" # Debghu extremeZipOutputFile.syswrite(wholeFileContent) # 写入文件 processCounter += 1 # 计数 end extremeZipOutputFile.close # 关闭文件 end |
#compressInSubProcess(currentBlockData, currentResponsePipe) ⇒ Object
在子进程中具体执行的压缩代码
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# File 'lib/extremezip.zzaqsv.rb', line 368 def compressInSubProcess(currentBlockData, currentResponsePipe) #checkMemoryUsage(115) # Debug currentBlockDataToCompress = currentBlockData # 读取数据块 currentCompressedVfsData = LZMA.compress(currentBlockDataToCompress) # 压缩当前块 #checkMemoryUsage(120) #puts("compressed data length: #{currentCompressedVfsData.bytesize}") # Debug. currentResponsePipe.put currentCompressedVfsData # 将压缩后的数据块写入到回复管道中 puts("finished #{Process.pid}") # Debug end |
#compressVfsMenu(victoriaFresh) ⇒ Object
压缩目录数据。
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# File 'lib/extremezip.zzaqsv.rb', line 108 def compressVfsMenu(victoriaFresh) replyByteArray = victoriaFresh.to_cbor # #打包成字节数组。 # 压缩目录数据并放入CBOR: compressedVfsMenu = LZMA.compress(replyByteArray) # 压缩目录数据 @wholeCbor['vfsMenu'] = compressedVfsMenu # 加入目录 end |
#exz(rootPath) ⇒ Object
压缩
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# File 'lib/extremezip.zzaqsv.rb', line 194 def exz(rootPath) , fileExists=loadStamp(rootPath) # 读取时间戳阈值。 puts "threshold: #{}" # Debug #陈欣 if ( > 0) # 有效的时间戳 @clipDownloader.= # 设置文件时间戳阈值。 end #if (timestampTHreshold > 0) # 有效的时间戳 puts "threshold vfs: #{@clipDownloader.}" # Debug if fileExists # 存在文件,则表明将要发生增量压缩 @wholeCbor['incremental']=true # 是增量压缩。 end # if fileExists # 存在文件,则表明用户要求增量压缩 @wholeCbor['timestamp']=@processTimestamp # 记录进程启动的时间戳。 victoriaFresh, = @clipDownloader.checkOnce(rootPath) # 打包该目录树。 @filePartAmount = @clipDownloader.currentDiskFlushSuffix # 获取文件个数 compressVfsMenu(victoriaFresh) # 压缩目录数据。 addBasicFileInformation # 加入基本文件信息 processIdList, responsePipeList = launchSubProcesses # 启动子进程。 reportTopLargeFileList(victoriaFresh) # report top large file list. receiveCompressedVfsDataList(processIdList, responsePipeList) # 接收压缩后的数据块列表 checkMemoryUsage(155) @wholeCbor['vfsDataList'] = @vfsDataList # 加入数据 wholeFileContent = 'exz' + "\0" + @wholeCbor.to_cbor # 追加CBOR字节数组 vfsDataListStart=wholeFileContent.length # 按照现在的序列化情况,计算出来的起始位置。 while (vfsDataListStart!=@wholeCbor['vfsDataListStart']) # 计算出的偏移不一致 @wholeCbor['vfsDataListStart']=vfsDataListStart # 使用新的值 wholeFileContent = 'exz' + "\0" + @wholeCbor.to_cbor # 追加CBOR字节数组 vfsDataListStart=wholeFileContent.length # 按照现在的序列化情况,计算出来的起始位置。 end # 写入文件: writeFile(wholeFileContent, victoriaFresh) # 写入文件内容 appendVfsDataList victoriaFresh # 追加压缩块列表数据。 if fileExists # 存在文件,则表明将要发生增量压缩 writeStamp (rootPath) # 更新时间戳文件 end # if fileExists # 存在文件,则表明用户要求增量压缩 end |
#launchSubProcesses ⇒ Object
启动子进程。
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# File 'lib/extremezip.zzaqsv.rb', line 359 def launchSubProcesses while ((@filePartCounter < @filePartAmount) && (@filePartCounter<@maxSubProcessAmount)) # 未处理完毕,并且未达到最大子进程个数 currentResponsePipe, p1 = schedule1Block(@filePartCounter) # 计划一个块的压缩计算 end # while processDataLength < victoriaFreshData.byte_size do #未处理完毕 [@processIdList, @responsePipeList] end |
#loadStamp(rootPath) ⇒ Object
writeStamp # 更新时间戳文件
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# File 'lib/extremezip.zzaqsv.rb', line 146 def loadStamp(rootPath) # 读取时间戳阈值。 stamp=0 # 默认值。 fileExists=false # 文件是否存在 directoryPathName=Pathname.new(rootPath) #构造路径名字对象。 isFile=directoryPathName.file? #是否是文件。 unless isFile #是文件就跳过。 #陈欣 datastore= "#{directoryPathName.}/.exzstamp" # 配置文件路径 puts "reading stamp file: #{datastore}" # Debug begin # 尝试读取。 #陈欣 currentBlockFile = File.new(datastore, 'rb') # 打开文件 fileExists=true # 文件存在 stampFileContent = currentBlockFile.read # 读取全部内容 currentBlockFile.close # 关闭文件 = {:tolerant => true} wholeCbor = CBOR.decode(stampFileContent, ) # 解码 puts wholeCbor # Debug puts wholeCbor.inspect # Debug stamp = wholeCbor['timestamp'].to_i # 获取时间戳 #stamp = wholeCbor.try(:[], 'timestamp') # 获取时间戳 rescue Errno::ENOENT, TypeError end end #unless isFile #是文件就跳过。 return stamp, fileExists # 返回时间戳。 end |
#readBlockFile(filePartCounter) ⇒ Object
读取块文件内容
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# File 'lib/extremezip.zzaqsv.rb', line 322 def readBlockFile(filePartCounter) currentBlockFile = File.new(@clipDownloader.diskFileName + filePartCounter.to_s + '.v', 'rb') # 打开文件 currentBlockData = currentBlockFile.read # 读取全部内容 currentBlockFile.close # 关闭文件 File.delete(currentBlockFile) # 删除数据块文件 currentBlockData end |
#receiveCompressedVfsDataList(processIdList, responsePipeList) ⇒ Object
接收压缩后的数据块列表
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# File 'lib/extremezip.zzaqsv.rb', line 294 def receiveCompressedVfsDataList(processIdList, responsePipeList) processCounter = 0 # 子进程计数器 while (processCounter<@filePartAmount) # 并不是所有分块都被处理完毕了。 currentSubProcess=processIdList[processCounter] # 获取子进程对象 compressed = receiveFromSubProcess(currentSubProcess, responsePipeList, processCounter) # 从子进程中读取数据,并终止子进程 #写入当前压缩块到文件系统中去作为缓存。陈欣 writeCompressBlock(compressed, processCounter) # 写入压缩块文件 blockInfo={} # 块信息 blockInfo['length']=compressed.length # 记录长度 #puts "block length: #{blockInfo['length']}" # Debug @vfsDataList << blockInfo # 加入数据块列表中 checkMemoryUsage(150) processCounter += 1 # 子进程计数 if (@filePartCounter<@filePartAmount) # 还有一些分块尚未交给子进程进行处理 schedule1Block(@filePartCounter) # 再启动一个子进程 end # if (@filePartCounter<@filePartAmount) # 还有一些分块尚未交给子进程进行处理 end # processIdList.each do |currentSubProcess| end |
#receiveFromSubProcess(currentSubProcess, responsePipeList, processCounter) ⇒ Object
从子进程中读取数据,并终止子进程
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# File 'lib/extremezip.zzaqsv.rb', line 383 def receiveFromSubProcess(currentSubProcess, responsePipeList, processCounter) puts("waiting #{currentSubProcess}") # Debug #checkMemoryUsage(140) currentResponsePipe = responsePipeList[processCounter] # 任务回复管道 currentCompressedVfsDataFromSubProcess = currentResponsePipe.get # 读取压缩后数据 #checkMemoryUsage(145) Process.waitpid(currentSubProcess) # 等待该个子进程 currentCompressedVfsDataFromSubProcess end |
#reportRememberOneFileNode(victoriaFresh, parentPath) ⇒ Object
process one file node
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# File 'lib/extremezip.zzaqsv.rb', line 56 def reportRememberOneFileNode(victoriaFresh, parentPath) if (victoriaFresh['is_file']) # it is a file file_lenght=victoriaFresh['file_length'] # get file length if (file_lenght > (@leastTopFileLength) ) # larger than least top file length insertedFileObject=false if (@topFileList.size>=10) # already have 10 files in top list @topFileList.pop # pop last one. end # if (@topFileList.size>=10) # already have 10 files in top list #puts("#{__LINE__}, parent path: #{victoriaFresh['parent_path']}") toInsertFileObject=victoriaFresh toInsertFileObject['parent_path']=parentPath #puts("#{__LINE__}, parent path: #{toInsertFileObject['parent_path']}, #{victoriaFresh['parent_path']}") topFileIndex=0 #if (@topFileList.size==0) # no item in list #puts("#{__LINE__}, insert, #{toInsertFileObject['name']}, #{toInsertFileObject['file_length']}") #@topFileList.insert(topFileIndex, toInsertFileObject) # insert into top file list. #else # if (@topFileList.size==0) # no item in list #topFileIndex=@topFileList.size - 1 fileIndexRange=0..(@topFileList.size-1) fileIndexRange.each do |topFileIndex| #while (topFileIndex>=0) do # find insert point one by one currentTopFile=@topFileList[topFileIndex] if (file_lenght>currentTopFile['file_length']) #puts("#{__LINE__}, insert, #{toInsertFileObject['name']}, #{toInsertFileObject['file_length']}, #{parentPath}, #{toInsertFileObject['parent_path']}") @topFileList.insert(topFileIndex, toInsertFileObject) # insert into top file list. insertedFileObject=true break end #topFileIndex -= 1 end # while (topFileIndex>=0) do # find insert point one by one #end # if (@topFileList.size==0) # no item in list unless insertedFileObject # not inserted file object @topFileList << (toInsertFileObject) # insert into top file list. end # unless insertedFileObject # not inserted file object @leastTopFileLength=@topFileList.last['file_length'] end # if (file_lenght>leastTopFileLength) # larger than least top file length else # it is a directory #puts "victoriaFresh: #{victoriaFresh}" # debug. victoriaFresh['sub_files']&.each do |sub_file| # remember sub files one by one. This might be a symbol link. reportRememberOneFileNode(sub_file, "#{parentPath}/#{victoriaFresh['name']}") end # victoriaFresh['sub_files']&.each do |sub_file| # remember sub files one by one. This might be a symbol link. end # else # it is a directory end |
#reportTopLargeFileList(victoriaFresh) ⇒ Object
report top large file list.
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# File 'lib/extremezip.zzaqsv.rb', line 42 def reportTopLargeFileList(victoriaFresh) #puts "vfs menu content: #{victoriaFresh}" puts "vfs menu class: #{victoriaFresh.class}" reportRememberOneFileNode(victoriaFresh, '.') # process one file node puts("Top large files:") @topFileList.each do |topFile| puts("#{topFile['name']}, #{topFile['parent_path']}, #{topFile['file_length']}") end end |
#schedule1Block(filePartCounter) ⇒ Object
计划一个块的压缩计算
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# File 'lib/extremezip.zzaqsv.rb', line 335 def schedule1Block(filePartCounter) currentBlockData = readBlockFile(filePartCounter) # 读取块文件内容 currentResponsePipe = Cod.pipe # 任务回复管道 p1 = fork do # 复制出子进程 compressInSubProcess(currentBlockData, currentResponsePipe) # 在子进程中具体执行的压缩代码 end # p1 = fork do #复制出子进程 # processDataLength += @dataBlockLength # 计数 #checkMemoryUsage(130) # 记录管道: # taskPipeList << currentTaskPipe @responsePipeList << currentResponsePipe # 记录回复管道 @processIdList << p1 # 记录到子进程列表中 @filePartCounter += 1 # 计数 [currentResponsePipe, p1] end |
#writeCompressBlock(compressed, processCounter) ⇒ Object
写入压缩块文件
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# File 'lib/extremezip.zzaqsv.rb', line 252 def writeCompressBlock(compressed, processCounter) extremeZipOutputFile = File.new("comressed.#{processCounter}.cex", 'wb') # 创建文件 extremeZipOutputFile.syswrite(compressed) # 写入文件 extremeZipOutputFile.close # 关闭文件 end |
#writeFile(wholeFileContent, victoriaFresh) ⇒ Object
写入文件内容
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# File 'lib/extremezip.zzaqsv.rb', line 287 def writeFile(wholeFileContent, victoriaFresh) extremeZipOutputFile = File.new("#{victoriaFresh['name']}.exz", 'wb') # 创建文件 extremeZipOutputFile.syswrite(wholeFileContent) # 写入文件 extremeZipOutputFile.close # 关闭文件 end |
#writeStamp(rootPath) ⇒ Object
addBasicFileInformation # 加入基本文件信息
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# File 'lib/extremezip.zzaqsv.rb', line 129 def writeStamp(rootPath) # 更新时间戳文件 directoryPathName=Pathname.new(rootPath) #构造路径名字对象。 datastore= "#{directoryPathName.}/.exzstamp" # 配置文件路径 puts "writing stamp file: #{datastore}" # Debug #stamp = wholeCbor['timestamp'] # 获取时间戳 stampCbor={} # 时间戳对象。 stampCbor['timestamp']= @processTimestamp # 设置时间戳。 compressed= stampCbor.to_cbor extremeZipOutputFile = File.new(datastore, 'wb') # 创建文件 extremeZipOutputFile.syswrite(compressed) # 写入文件 extremeZipOutputFile.close # 关闭文件 end |