private void createFile(Configuration config, String fileName) throws IOException {
   ObjectContainer oc = Db4o.openFile(config, fileName);
   try {
     populate(oc);
   } finally {
     oc.close();
   }
   File4.copy(fileName, fileName + "0");
 }
 public void completeInterruptedTransaction(int transactionId1, int transactionId2) {
   if (!File4.exists(lockFileName(_fileName))) {
     return;
   }
   if (!lockFileSignalsInterruptedTransaction()) {
     return;
   }
   ByteArrayBuffer buffer = new ByteArrayBuffer(Const4.INT_LENGTH);
   openLogFile();
   read(_logFile, buffer);
   int length = buffer.readInt();
   if (length > 0) {
     buffer = new ByteArrayBuffer(length);
     read(_logFile, buffer);
     buffer.incrementOffset(Const4.INT_LENGTH);
     readWriteSlotChanges(buffer);
   }
   deleteLockFile();
   closeLogFile();
   deleteLogFile();
 }
 private void deleteLogFile() {
   File4.delete(logFileName(_fileName));
 }
    /** @sharpen.remove */
    public void test() throws IOException {

      boolean cached = USE_CACHE.value().booleanValue();
      boolean useLogFile = USE_LOGFILE.value().booleanValue();
      boolean writeTrash = WRITE_TRASH.value().booleanValue();

      if (cached && writeTrash) {
        System.err.println(
            "DISABLED CrashSimulatingTestCase: combination of write trash and cache");
        // The cache may touch more bytes than the ones we modified.
        // We should be safe even if we don't get this test to pass.
        return;
      }

      if (useLogFile && writeTrash) {
        System.err.println(
            "DISABLED CrashSimulatingTestCase: combination of write trash and use log file");

        // The log file is not a public API yet anyway.
        // It's only needed for the PointerBasedIdSystem
        // With the new BTreeIdSystem it's not likely to become important
        // so we can safely ignore the failing write trash case.
        return;
      }

      if (Platform4.needsLockFileThread()) {
        System.out.println(
            "CrashSimulatingTestCase is ignored on platforms with lock file thread.");
        return;
      }

      String path = Path4.combine(Path4.getTempPath(), "crashSimulate");
      String fileName = Path4.combine(path, "cs");

      File4.delete(fileName);
      File4.mkdirs(path);

      createFile(baseConfig(useLogFile), fileName);

      CrashSimulatingStorage crashSimulatingStorage =
          new CrashSimulatingStorage(new FileStorage(), fileName);
      Storage storage =
          cached ? (Storage) new CachingStorage(crashSimulatingStorage) : crashSimulatingStorage;

      Configuration recordConfig = baseConfig(useLogFile);
      recordConfig.storage(storage);

      ObjectContainer oc = Db4o.openFile(recordConfig, fileName);

      ObjectSet objectSet = oc.queryByExample(new CrashData(null, "three"));
      oc.delete(objectSet.next());

      oc.store(new CrashData(null, "four"));
      oc.store(new CrashData(null, "five"));
      oc.store(new CrashData(null, "six"));
      oc.store(new CrashData(null, "seven"));
      oc.store(new CrashData(null, "eight"));
      oc.store(new CrashData(null, "nine"));
      oc.store(new CrashData(null, "10"));
      oc.store(new CrashData(null, "11"));
      oc.store(new CrashData(null, "12"));
      oc.store(new CrashData(null, "13"));
      oc.store(new CrashData(null, "14"));

      oc.commit();

      Query q = oc.query();
      q.constrain(CrashData.class);
      objectSet = q.execute();
      while (objectSet.hasNext()) {
        CrashData cData = (CrashData) objectSet.next();
        if (!(cData._name.equals("10") || cData._name.equals("13"))) {
          oc.delete(cData);
        }
      }

      oc.commit();

      oc.close();

      int count = crashSimulatingStorage._batch.writeVersions(fileName, writeTrash);

      checkFiles(useLogFile, fileName, "R", crashSimulatingStorage._batch.numSyncs());
      checkFiles(useLogFile, fileName, "W", count);
      if (VERBOSE) {
        System.out.println("Total versions: " + count);
      }
    }