KeysOnlyReader
The KeysOnlyReader only extracts the key names from a database.
Constructors
You can use one of these constructors to create a new KeysOnlyReader object:
public KeysOnlyReader()
public KeysOnlyReader(int scanSize, String pattern)
Parameters
| Name | Type | Default value | Description |
|---|---|---|---|
| pattern | string | “*” (match all keys) | Get all keys that match this pattern |
| scanSize | integer | 10000 | The scan command’s size limit |
Output records
Each output record is a string that represents the key’s name.
Examples
Get all keys in the database:
KeysOnlyReader reader = new KeysOnlyReader();
Only get keys that start with “user:”:
KeysOnlyReader reader = new KeysOnlyReader(1000, "user:*");