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VOEGELAS SHLOMIF SYP SREZIC

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Kevin A. McGrail
and 1 contributors

NAME

Mail::SpamAssassin::BayesStore - Storage Module for default Bayes classifier

DESCRIPTION

This is the public API for the Bayesian store methods. Any implementation of the storage module for the default Bayes classifier must implement these methods.

METHODS

new

public class (Mail::SpamAssassin::BayesStore) new (Mail::SpamAssassin::Plugin::Bayes $bayes)

Description: This method creates a new instance of the Mail::SpamAssassin::BayesStore object. You must pass in an instance of the Mail::SpamAssassin::Plugin::Bayes object, which is stashed for use throughout the module.

DB_VERSION

public instance (Integer) DB_VERSION ()

Description: This method returns the currently supported database version for the implementation.

read_db_configs

public instance () read_db_configs ()

Description: This method reads any needed config variables from the configuration object and then calls the Mail::SpamAssassin::Plugin::Bayes read_db_configs method.

prefork_init

public instance (Boolean) prefork_init ()

Description: This optional method is called in the parent process shortly before forking off child processes.

spamd_child_init

public instance (Boolean) spamd_child_init ()

Description: This optional method is called in a child process shortly after being spawned.

tie_db_readonly

public instance (Boolean) tie_db_readonly ()

Description: This method opens up the database in readonly mode.

tie_db_writable

public instance (Boolean) tie_db_writable ()

Description: This method opens up the database in writable mode.

Any callers of this methods should ensure that they call untie_db() afterwards.

untie_db

public instance () untie_db ()

Description: This method unties the database.

calculate_expire_delta

public instance (%) calculate_expire_delta (Integer $newest_atime, Integer $start, Integer $max_expire_mult)

Description: This method performs a calculation on the data to determine the optimum atime for token expiration.

token_expiration

public instance (Integer, Integer, Integer, Integer) token_expiration(\% $opts, Integer $newest_atime, Integer $newdelta)

Description: This method performs the database specific expiration of tokens based on the passed in $newest_atime and $newdelta.

expire_old_tokens

public instance (Boolean) expire_old_tokens (\% hashref)

Description: This method expires old tokens from the database.

expire_old_tokens_trapped

public instance (Boolean) expire_old_tokens_trapped (\% $opts)

Description: This methods does the actual token expiration.

XXX More docs here about the methodology and what not

sync_due

public instance (Boolean) sync_due ()

Description: This methods determines if a sync is due.

expiry_due

public instance (Boolean) expiry_due ()

Description: This methods determines if an expire is due.

seen_get

public instance (Char) seen_get (String $msgid)

Description: This method retrieves the stored value, if any, for $msgid. The return value is the stored string ('s' for spam and 'h' for ham) or undef if $msgid is not found.

seen_put

public instance (Boolean) seen_put (String $msgid, Char $flag)

Description: This method records $msgid as the type given by $flag. $flag is one of two values 's' for spam and 'h' for ham.

seen_delete

public instance (Boolean) seen_delete (String $msgid)

Description: This method removes $msgid from storage.

get_storage_variables

public instance (@) get_storage_variables ()

Description: This method retrieves the various administrative variables used by the Bayes storage implementation.

The values returned in the array are in the following order:

0: scan count base

1: number of spam

2: number of ham

3: number of tokens in db

4: last expire atime

5: oldest token in db atime

6: db version value

7: last journal sync

8: last atime delta

9: last expire reduction count

10: newest token in db atime

dump_db_toks

public instance () dump_db_toks (String $template, String $regex, @ @vars)

Description: This method loops over all tokens, computing the probability for the token and then printing it out according to the passed in template.

set_last_expire

public instance (Boolean) _set_last_expire (Integer $time)

Description: This method sets the last expire time.

get_running_expire_tok

public instance (Time) get_running_expire_tok ()

Description: This method determines if an expire is currently running and returns the time the expire started.

set_running_expire_tok

public instance (Time) set_running_expire_tok ()

Description: This method sets the running expire time to the current time.

remove_running_expire_tok

public instance (Boolean) remove_running_expire_tok ()

Description: This method removes a currently set running expire time.

tok_get

public instance (Integer, Integer, Time) tok_get (String $token)

Description: This method retrieves the specified token ($token) from storage and returns it's spam count, ham acount and last access time.

tok_get_all

public instance (\@) tok_get_all (@ @tokens)

Description: This method retrieves the specified tokens (@tokens) from storage and returns an array ref of arrays spam count, ham count and last access time.

tok_count_change

public instance (Boolean) tok_count_change (Integer $spam_count, Integer $ham_count, String $token, Time $atime)

Description: This method takes a $spam_count and $ham_count and adds it to $token along with updating $tokens atime with $atime.

multi_tok_count_change

public instance (Boolean) multi_tok_count_change (Integer $spam_count, Integer $ham_count, \% $tokens, String $atime)

Description: This method takes a $spam_count and $ham_count and adds it to all of the tokens in the $tokens hash ref along with updating each tokens atime with $atime.

nspam_nham_get

public instance (Integer, Integer) nspam_nham_get ()

Description: This method retrieves the total number of spam and the total number of ham currently under storage.

nspam_nham_change

public instance (Boolean) nspam_nham_change (Integer $num_spam, Integer $num_ham)

Description: This method updates the number of spam and the number of ham in the database.

tok_touch

public instance (Boolean) tok_touch (String $token, Time $atime)

Description: This method updates the given tokens ($token) access time.

tok_touch_all

public instance (Boolean) tok_touch_all (\@ $tokens, Time $atime)

Description: This method does a mass update of the given list of tokens $tokens, if the existing token atime is < $atime.

cleanup

public instance (Boolean) cleanup ()

Description: This method performs any cleanup necessary before moving onto the next operation.

get_magic_re

public instance get_magic_re (String)

Description: This method returns a regexp which indicates a magic token.

sync

public instance (Boolean) sync (\% $opts)

Description: This method performs a sync of the database.

perform_upgrade

public instance (Boolean) perform_upgrade (\% $opts)

Description: This method is a utility method that performs any necessary upgrades between versions. It should know how to handle previous versions and what needs to happen to upgrade them.

A true return value indicates success.

clear_database

public instance (Boolean) clear_database ()

Description: This method deletes all records for a particular user.

Callers should be aware that any errors returned by this method could causes the database to be inconsistent for the given user.

backup_database

public instance (Boolean) backup_database ()

Description: This method will dump the users database in a machine readable format.

restore_database

public instance (Boolean) restore_database (String $filename, Boolean $showdots)

Description: This method restores a database from the given filename, $filename.

Callers should be aware that any errors returned by this method could causes the database to be inconsistent for the given user.

db_readable

public instance (Boolean) db_readable ()

Description: This method returns whether or not the Bayes DB is available in a readable state.

db_writable

public instance (Boolean) db_writable ()

Description: This method returns whether or not the Bayes DB is available in a writable state.