| 1 | <!DOCTYPE html> <html> <head> <title>LogUtil.coffee</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <link rel="stylesheet" media="all" href="docco.css" /> </head> <body> <div id="container"> <div id="background"></div> <div id="jump_to"> Jump To … <div id="jump_wrapper"> <div id="jump_page"> <a class="source" href="ByteIterable.html"> ByteIterable.coffee </a> <a class="source" href="ByteIterator.html"> ByteIterator.coffee </a> <a class="source" href="ArrayByteIterable.html"> ArrayByteIterable.coffee </a> <a class="source" href="ByteIterableBase.html"> ByteIterableBase.coffee </a> <a class="source" href="ByteIterableUtil.html"> ByteIterableUtil.coffee </a> <a class="source" href="LightOutputStream.html"> LightOutputStream.coffee </a> <a class="source" href="StoreConfiguration.html"> StoreConfiguration.coffee </a> <a class="source" href="Reader.html"> Reader.coffee </a> <a class="source" href="Writer.html"> Writer.coffee </a> <a class="source" href="List.html"> List.coffee </a> <a class="source" href="ListNode.html"> ListNode.coffee </a> <a class="source" href="Cursor.html"> Cursor.coffee </a> <a class="source" href="DatabaseRoot.html"> DatabaseRoot.coffee </a> <a class="source" href="Environment.html"> Environment.coffee </a> <a class="source" href="EnvironmentConfig.html"> EnvironmentConfig.coffee </a> <a class="source" href="Store.html"> Store.coffee </a> <a class="source" href="Transaction.html"> Transaction.coffee </a> <a class="source" href="Addr64.html"> Addr64.coffee </a> <a class="source" href="DataIterator.html"> DataIterator.coffee </a> <a class="source" href="Log.html"> Log.coffee </a> <a class="source" href="LogCache.html"> LogCache.coffee </a> <a class="source" href="LogConfig.html"> LogConfig.coffee </a> <a class="source" href="LogUtil.html"> LogUtil.coffee </a> <a class="source" href="Loggable.html"> Loggable.coffee </a> <a class="source" href="LoggableFactory.html"> LoggableFactory.coffee </a> <a class="source" href="LoggableIterator.html"> LoggableIterator.coffee </a> <a class="source" href="LoggableToWrite.html"> LoggableToWrite.coffee </a> <a class="source" href="NullLoggable.html"> NullLoggable.coffee </a> <a class="source" href="RandomAccessByteIterable.html"> RandomAccessByteIterable.coffee </a> <a class="source" href="RandomAccessLoggable.html"> RandomAccessLoggable.coffee </a> <a class="source" href="RandomAccessLoggableIterator.html"> RandomAccessLoggableIterator.coffee </a> <a class="source" href="StackList.html"> StackList.coffee </a> <a class="source" href="CompoundByteIterable.html"> CompoundByteIterable.coffee </a> <a class="source" href="CompoundByteIteratorBase.html"> CompoundByteIteratorBase.coffee </a> <a class="source" href="CompressedUnsignedLongByteIterable.html"> CompressedUnsignedLongByteIterable.coffee </a> <a class="source" href="FixedLengthByteIterable.html"> FixedLengthByteIterable.coffee </a> </div> </div> </div> <table cellpadding="0" cellspacing="0"> <thead> <tr> <th class="docs"> <h1> LogUtil.coffee </h1> </th> <th class="code"> </th> </tr> </thead> <tbody> <tr id="section-1"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-1">¶</a> </div> </td> <td class="code"> <div class="highlight"><pre><span class="nv">fs = </span><span class="nx">require</span> <span class="s1">'fs'</span>
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| 2 | <span class="nv">Addr64 = </span><span class="p">(</span><span class="nx">require</span> <span class="s1">'./Addr64.coffee'</span><span class="p">).</span><span class="nx">Addr64</span></pre></div> </td> </tr> <tr id="section-2"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-2">¶</a> </div> <p>This class contains simple util functions, e.g. converting address to filename
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| 3 | and vice versa.</p> </td> <td class="code"> <div class="highlight"><pre><span class="k">class</span> <span class="nx">LogUtil</span>
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| 4 | <span class="vi">@LOG_BLOCK_ALIGNMENT: </span><span class="mi">1024</span> <span class="c1"># log files are aligned by kilobytes</span>
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| 5 | <span class="vi">@LOG_FILE_NAME_WITH_EXT_LENGTH: </span><span class="mi">14</span>
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| 6 | <span class="vi">@LOG_FILE_NAME_LENGTH: </span><span class="mi">11</span>
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| 7 | <span class="vi">@LOG_FILE_EXTENSION: </span><span class="s2">".xd"</span>
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| 8 | <span class="vi">@LOG_NAME_BASE: </span><span class="mi">32</span></pre></div> </td> </tr> <tr id="section-3"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-3">¶</a> </div> <p>Generates file name (without directory) from address.</p>
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| 9 |
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| 10 | <p>@param address Addr64 object
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| 11 | @return filename</p> </td> <td class="code"> <div class="highlight"><pre> <span class="nx">@getLogFilename</span><span class="nv">$Addr64: </span><span class="nf">(address) -></span>
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| 12 | <span class="nv">fn = </span><span class="nx">Addr64</span><span class="p">.</span><span class="nx">addr64ToString$Addr64$int</span> <span class="nx">address</span><span class="p">,</span> <span class="nx">@LOG_NAME_BASE</span>
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| 13 | <span class="nv">fn = </span><span class="nx">fn</span><span class="p">.</span><span class="nx">substr</span> <span class="mi">0</span><span class="p">,</span> <span class="nx">@LOG_FILE_NAME_LENGTH</span>
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| 14 | <span class="nv">fn = </span><span class="nx">fn</span> <span class="o">+</span> <span class="nx">@LOG_FILE_EXTENSION</span>
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| 15 | <span class="k">return</span> <span class="nx">fn</span></pre></div> </td> </tr> <tr id="section-4"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-4">¶</a> </div> <p>Gets address from log filename.</p>
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| 16 |
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| 17 | <p>@param logFileName name of log file (without directory).
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| 18 | @return address of beginning of this file.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="nx">@getAddress</span><span class="nv">$String: </span><span class="nf">(logFilename) -></span>
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| 19 | <span class="nv">logFilename = </span><span class="nx">logFilename</span><span class="p">.</span><span class="nx">substr</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="nx">@LOG_FILE_NAME_LENGTH</span><span class="p">)</span> <span class="o">+</span> <span class="s2">"00"</span> <span class="o">+</span>
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| 20 | <span class="nx">@LOG_FILE_EXTENSION</span>
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| 21 | <span class="nv">addr = </span><span class="p">(</span><span class="nx">Addr64</span><span class="p">.</span><span class="nx">stringToAddr64$String$int</span> <span class="nx">logFilename</span><span class="p">,</span> <span class="nx">@LOG_NAME_BASE</span><span class="p">)</span>
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| 22 | <span class="k">return</span> <span class="nx">addr</span></pre></div> </td> </tr> <tr id="section-5"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-5">¶</a> </div> <p>Gets list of files in directory.</p>
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| 23 |
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| 24 | <p>@param directory the place where log is proposed to be.
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| 25 | @return list of only log files in this directory.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="nx">@listFiles</span><span class="nv">$String: </span><span class="nf">(directory) -></span>
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| 26 | <span class="k">try</span>
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| 27 | <span class="nx">fs</span><span class="p">.</span><span class="nx">mkdirSync</span> <span class="nx">directory</span><span class="p">,</span> <span class="s1">'0777'</span>
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| 28 | <span class="k">catch</span> <span class="nx">e</span>
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| 29 | <span class="nv">rawFiles = </span><span class="nx">fs</span><span class="p">.</span><span class="nx">readdirSync</span> <span class="nx">directory</span>
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| 30 | <span class="nv">files = </span><span class="nx">rawFiles</span><span class="p">.</span><span class="nx">filter</span> <span class="p">(</span><span class="nx">element</span><span class="p">,</span> <span class="nx">index</span><span class="p">,</span> <span class="nx">array</span><span class="p">)</span> <span class="o">=></span>
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| 31 | <span class="k">return</span> <span class="nx">element</span><span class="p">.</span><span class="nx">indexOf</span><span class="p">(</span><span class="nx">@LOG_FILE_EXTENSION</span><span class="p">)</span> <span class="o">!=</span> <span class="o">-</span><span class="mi">1</span>
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| 32 | <span class="k">return</span> <span class="nx">files</span></pre></div> </td> </tr> <tr id="section-6"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-6">¶</a> </div> <p>Gets high address in the current directory (i.e. the address of the end
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| 33 | of the log).</p>
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| 34 |
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| 35 | <p>@param directory the place where log is proposed to be.
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| 36 | @return address.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="nx">@getHighAddress</span><span class="nv">$String: </span><span class="nf">(directory) -></span>
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| 37 | <span class="nv">files = </span><span class="nx">@listFiles$String</span> <span class="nx">directory</span>
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| 38 | <span class="k">if</span> <span class="nx">files</span><span class="p">.</span><span class="nx">length</span> <span class="o">!=</span> <span class="mi">0</span>
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| 39 | <span class="nx">files</span><span class="p">.</span><span class="nx">sort</span><span class="p">()</span>
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| 40 | <span class="nv">lastFile = </span><span class="nx">files</span><span class="p">[</span><span class="nx">files</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span>
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| 41 | <span class="nv">stats = </span><span class="nx">fs</span><span class="p">.</span><span class="nx">statSync</span> <span class="nx">directory</span> <span class="o">+</span> <span class="nx">lastFile</span>
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| 42 | <span class="nv">addr = </span><span class="p">(</span><span class="nx">LogUtil</span><span class="p">.</span><span class="nx">getAddress$String</span> <span class="nx">lastFile</span><span class="p">).</span><span class="nx">plus$int</span><span class="p">(</span><span class="nx">stats</span><span class="p">.</span><span class="nx">size</span><span class="p">)</span>
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| 43 | <span class="k">else</span>
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| 44 | <span class="nv">addr = </span><span class="nx">Addr64</span><span class="p">.</span><span class="nx">create$int$int</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span>
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| 45 | <span class="k">return</span> <span class="nx">addr</span>
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| 46 |
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| 47 | <span class="nv">exports.LogUtil = </span><span class="nx">LogUtil</span>
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| 48 |
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| 49 | </pre></div> </td> </tr> </tbody> </table> </div> </body> </html> |
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