---
name: "Data::Session::ID::AutoIncrement"
section: "3pm"
platform: "linux"
package: "libdata-session-perl"
version: "1.18-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/Data::Session::ID::AutoIncrement"
---

# Data::Session::ID::AutoIncrement(3pm)

A persistent session manager

## NAME

Data::Session::ID::AutoIncrement - A persistent session manager

## Synopsis

See Data::Session for details.

## Description

Data::Session::ID::AutoIncrement allows Data::Session to generate session ids.

To use this module do this:

- o Specify an id generator of type AutoIncrement, as Data::Session -\> new(type =\> '... id:AutoIncrement ...')

  ## Case-sensitive Options

See "Case-sensitive Options" in Data::Session for important information.

## Method: new()

Creates a new object of type Data::Session::ID::AutoIncrement.

`"new()"` takes a hash of key/value pairs, some of which might mandatory. Further, some combinations might be mandatory.

The keys are listed here in alphabetical order.

They are lower-case because they are (also) method names, meaning they can be called to set or get the value at any time.

- o id\_base =\> $integer

  Specifies the base value for the auto-incrementing sessions ids.

  This key is normally passed in as Data::Session -\> new(id\_base =\> `$integer`).

  Note: The first id returned by **generate()** is id\_base + id\_step.

  Default: 0.

  This key is optional.

- o id\_file =\> $file\_name

  Specifies the file name in which to save the 'current' id.

  This key is normally passed in as Data::Session -\> new(id\_file =\> `$file_name`).

  Note: The next id returned by **generate()** is 'current' id + id\_step.

  Default: File::Spec -\> catdir(File::Spec -\> tmpdir, 'data.session.id').

  The reason Data::Session -\> new(directory =\> ...) is not used as the default directory is because this latter option is for where the session files are stored if the driver is File and the id generator is not AutoIncrement.

  This key is optional.

- o id\_step =\> $integer

  Specifies the amount to be added to the previous id to get the next id.

  This key is normally passed in as Data::Session -\> new(id\_step =\> `$integer`).

  Default: 1.

  This key is optional.

- o no\_flock =\> $boolean

  Specifies (no\_flock =\> 1) to not use **flock()** to obtain a lock on `$file_name` (which holds the 'current' id) before processing it, or (no\_flock =\> 0) to use **flock()**.

  This key is normally passed in as Data::Session -\> new(no\_flock =\> `$boolean`).

  Default: 0.

  This key is optional.

- o umask =\> $octal\_value

  Specifies the mode to use when calling **sysopen()** on `$file_name`.

  This key is normally passed in as Data::Session -\> new(umask =\> `$octal_value`).

  Default: 0660.

  This key is optional.

- o verbose =\> $integer

  Print to STDERR more or less information.

  Typical values are 0, 1 and 2.

  This key is normally passed in as Data::Session -\> new(verbose =\> `$integer`).

  This key is optional.

## Method: generate()

Generates the next session id, or dies if it can't.

Returns the new id.

## Method: id\_length()

Returns 32 because that's the classic value of the size of the id field in the sessions table.

This can be used to generate the SQL to create the sessions table.

## Support

Log a bug on RT: \<https://rt.cpan.org/Public/Dist/Display.html?Name=Data-Session\>.

## Author

Data::Session was written by Ron Savage *\<ron@savage.net.au\>* in 2010.

Home page: \<http://savage.net.au/index.html\>.

## Copyright

Australian copyright (c) 2010, Ron Savage.

```
        All Programs of mine are 'OSI Certified Open Source Software';
        you can redistribute them and/or modify them under the terms of
        The Artistic License, a copy of which is available at:
        http://www.opensource.org/licenses/index.html
```