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POHow can a threadpool be reused after shutdown
 

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    <p>I have a .csv file containing over 70 million lines of which each line is to generate a <strong>Runnable</strong> and then executed by threadpool. This Runnable will insert a record into Mysql.</p> <p>What's more , I want to record a position of the csv file for the <strong>RandomAccessFile</strong> to locate. The position is written to a <strong>File</strong>.I want to write this record when all the threads in threadpool are finished.So ThreadPoolExecutor.shutdown() is invoked. But when more lines come, I need a threadpool again. How can I reuse this current threadpool instead of make a new one.</p> <p>The code is as follows:</p> <pre><code>public static boolean processPage() throws Exception { long pos = getPosition(); long start = System.currentTimeMillis(); raf.seek(pos); if(pos==0) raf.readLine(); for (int i = 0; i &lt; PAGESIZE; i++) { String lineStr = raf.readLine(); if (lineStr == null) return false; String[] line = lineStr.split(","); final ExperienceLogDO log = CsvExperienceLog.generateLog(line); //System.out.println("userId: "+log.getUserId()%512); pool.execute(new Runnable(){ public void run(){ try { experienceService.insertExperienceLog(log); } catch (BaseException e) { e.printStackTrace(); } } }); long end = System.currentTimeMillis(); } BufferedWriter resultWriter = new BufferedWriter( new OutputStreamWriter(new FileOutputStream(new File( RESULT_FILENAME), true))); resultWriter.write("\n"); resultWriter.write(String.valueOf(raf.getFilePointer())); resultWriter.close(); long time = System.currentTimeMillis()-start; System.out.println(time); return true; } </code></pre> <p>Thanks !</p>
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