org.kawanfw.sql.api.server.session.SessionIdentifierGenerator Maven / Gradle / Ivy
/*
* Copyright (c)2022 KawanSoft S.A.S. All rights reserved.
*
* Use of this software is governed by the Business Source License included
* in the LICENSE.TXT file in the project's root directory.
*
* Change Date: 2026-11-01
*
* On the date above, in accordance with the Business Source License, use
* of this software will be governed by version 2.0 of the Apache License.
*/
package org.kawanfw.sql.api.server.session;
import java.security.SecureRandom;
/**
*
* Session id generator with 26 long strings.
*
* Uses a static {@code SecureRandom}.
* Each call to {@code nextSessionId()} calls {@code SecureRandom#nextInt(int)}.
*
* See Open Source Edition source
* code.
*
* @author Nicolas de Pomereu
*
*/
public class SessionIdentifierGenerator {
private static final String AB = "0123456789abcdefghijklmnopqrstuvwxyz";
private static SecureRandom rnd = new SecureRandom();
/**
* Returns the next session id using a {@code SecureRandom}
*
* @return the next session id using a {@code SecureRandom}
*/
public String nextSessionId() {
return randomString(26);
}
private String randomString(int len) {
StringBuilder sb = new StringBuilder(len);
for (int i = 0; i < len; i++)
sb.append(AB.charAt(rnd.nextInt(AB.length())));
return sb.toString();
}
}