public MongoReader(
String dbHost,
String dbPort,
String dbName,
String dbUser,
String dbPasswd,
String colName,
MongoSplit split,
String[] readColumns) {
this.table = new MongoTable(dbHost, dbPort, dbName, dbUser, dbPasswd, colName);
this.split = split;
this.readColumns = readColumns;
this.cursor = table.findAll(readColumns).batchSize(BATCH_SIZE).skip((int) split.getStart());
if (!split.isLastSplit()) this.cursor.limit((int) split.getLength()); // if it's the last
// split,it will read
// all records since
// $start
}
@Override
public float getProgress() throws IOException {
return split.getLength() > 0 ? pos / (float) split.getLength() : 1.0f;
}