Regex Matcher

Full regular expression pattern matching.

Syntax

regex:<pattern>

Examples

Basic Patterns

# Match LOGIN or LOGOUT exactly
kete.routes.kafka.event-matchers.auth=regex:^(LOGIN|LOGOUT)$

# Events starting with LOGIN
kete.routes.kafka.event-matchers.login=regex:^LOGIN

# Events ending with ERROR
kete.routes.kafka.event-matchers.errors=regex:ERROR$

Character Classes

# USER followed by uppercase letter and digits
kete.routes.kafka.event-matchers.pattern=regex:^USER_[A-Z][0-9]+$

# Events containing numbers
kete.routes.kafka.event-matchers.pattern=regex:.*[0-9].*

Optional Patterns

# LOGIN with optional _ERROR suffix
kete.routes.kafka.event-matchers.pattern=regex:^LOGIN(_ERROR)?$

# USER with optional operation
kete.routes.kafka.event-matchers.pattern=regex:^USER(_CREATE|_UPDATE|_DELETE)?$

Exclude Patterns

# Exclude refresh events (use with ALL mode)
kete.routes.kafka.event-match-mode=all
kete.routes.kafka.event-matchers.all=glob:*
kete.routes.kafka.event-matchers.no-refresh=regex:not:.*REFRESH.*

Configuration Examples

Multiple Patterns

# Match login events OR user create events
kete.routes.kafka.event-matchers.login=regex:^LOGIN
kete.routes.kafka.event-matchers.user-create=regex:^USER_CREATE$

Combining with Other Matchers

# Exact match for LOGIN, regex for USER events
kete.routes.kafka.event-matchers.login=list:LOGIN
kete.routes.kafka.event-matchers.user-ops=regex:^USER_(CREATE|UPDATE)$

Realm-Specific Filtering

# Production - strict pattern matching
kete.routes.prod.realm-matchers.realm=list:production
kete.routes.prod.event-matchers.pattern=regex:^(LOGIN|LOGOUT|REGISTER)$

Case Sensitivity

All matchers in KETE are case-insensitive:

• regex:^LOGIN$ matches LOGIN, login, Login
• regex:^login$ matches LOGIN, login

Regex Reference

Metacharacters

Character	Meaning	Example
.	Any character	L.GIN matches LOGIN, LAGIN
^	Start of string	^LOGIN matches LOGIN_ERROR
$	End of string	ERROR$ matches LOGIN_ERROR
*	Zero or more	LOGIN.* matches LOGIN, LOGIN_ERROR
+	One or more	LOGIN.+ matches LOGIN_ERROR (not LOGIN)
?	Zero or one	LOGIN_?ERROR matches LOGINERROR, LOGIN_ERROR
\|	Alternation	LOGIN\|LOGOUT matches either
[]	Character class	[A-Z]+ matches uppercase letters
()	Grouping	(LOGIN\|LOGOUT)_ERROR

Quantifiers

Quantifier	Meaning	Example
{3}	Exactly 3	^.{3}$ matches 3-character strings
{2,5}	2 to 5	^.{2,5}$ matches 2-5 characters
{4,}	4 or more	^.{4,}$ matches 4+ characters