Package org.iq80.leveldb

Examples of org.iq80.leveldb.DB

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            throws IOException, DBException
    {
        Options options = new Options().createIfMissing(true).compressionType(CompressionType.NONE);

        File path = getTestDirectory("testCompaction");
        DB db = factory.open(path, options);

        System.out.println("Adding");
        for (int i = 0; i < 1000 * 1000; i++) {
            if (i % 100000 == 0) {
                System.out.println("  at: " + i);
            }
            db.put(bytes("key" + i), bytes("value" + i));
        }

        db.close();
        db = factory.open(path, options);

        System.out.println("Deleting");
        for (int i = 0; i < 1000 * 1000; i++) {
            if (i % 100000 == 0) {
                System.out.println("  at: " + i);
            }
            db.delete(bytes("key" + i));
        }

        db.close();
        db = factory.open(path, options);

        System.out.println("Adding");
        for (int i = 0; i < 1000 * 1000; i++) {
            if (i % 100000 == 0) {
                System.out.println("  at: " + i);
            }
            db.put(bytes("key" + i), bytes("value" + i));
        }

        db.close();
    }
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    public void testEmptyBatch()
            throws Exception
    {
        // open new db
        Options options = new Options().createIfMissing(true);
        DB db = new Iq80DBFactory().open(databaseDir, options);

        // write an empty batch
        WriteBatch batch = db.createWriteBatch();
        batch.close();
        db.write(batch);

        // close the db
        db.close();

        // reopen db
        new Iq80DBFactory().open(databaseDir, options);
    }
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        }

        this.databaseDir = databaseDir;

        //use custom comparator if set
        DBComparator comparator = options.comparator();
        UserComparator userComparator;
        if (comparator != null) {
            userComparator = new CustomUserComparator(comparator);
        }else{
            userComparator = new BytewiseComparator();
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    try {
      iter.seek(key);
    } catch (DBException e) {
      throw e;
    } catch (RuntimeException e) {
      throw new DBException(e.getMessage(), e);
    }
  }
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    try {
      iter.seekToFirst();
    } catch (DBException e) {
      throw e;
    } catch (RuntimeException e) {
      throw new DBException(e.getMessage(), e);
    }
  }
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    try {
      iter.seekToLast();
    } catch (DBException e) {
      throw e;
    } catch (RuntimeException e) {
      throw new DBException(e.getMessage(), e);
    }
  }
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    try {
      return iter.hasNext();
    } catch (DBException e) {
      throw e;
    } catch (RuntimeException e) {
      throw new DBException(e.getMessage(), e);
    }
  }
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    try {
      return iter.next();
    } catch (DBException e) {
      throw e;
    } catch (RuntimeException e) {
      throw new DBException(e.getMessage(), e);
    }
  }
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    try {
      return iter.peekNext();
    } catch (DBException e) {
      throw e;
    } catch (RuntimeException e) {
      throw new DBException(e.getMessage(), e);
    }
  }
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    try {
      return iter.hasPrev();
    } catch (DBException e) {
      throw e;
    } catch (RuntimeException e) {
      throw new DBException(e.getMessage(), e);
    }
  }
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