Record Class WatchEvent

java.lang.Object

java.lang.Record

com.loomcache.server.watch.WatchEvent

Record Components:

type - the event type (PUT or DELETE, must not be null)

key - the key that was mutated (must not be null)

value - the new value (null for DELETE events)

prevValue - the previous value (null for new keys or DELETE events)

revision - the global revision when this event occurred (must be positive)

modRevision - the key's modification revision (must be positive)

public record WatchEvent(WatchEvent.Type type, String key, @Nullable String value, @Nullable String prevValue, long revision, long modRevision)
extends Record

A watch event representing a key mutation (put or delete).

Includes full MVCC revision information for consistent event ordering and causality tracking (similar to etcd watch events).

Thread-safe: This record is immutable and inherently thread-safe.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	WatchEvent.Type	Event type enumeration.

Constructor Summary

Constructors

Constructor	Description
WatchEvent(WatchEvent.Type type, String key, @Nullable String value, @Nullable String prevValue, long revision, long modRevision)	Creates an instance of a WatchEvent record class.

Method Summary

Modifier and Type	Method	Description
final boolean	equals(Object o)	Indicates whether some other object is "equal to" this one.
final int	hashCode()	Returns a hash code value for this object.
String	key()	Returns the value of the key record component.
long	modRevision()	Returns the value of the modRevision record component.
@Nullable String	prevValue()	Returns the value of the prevValue record component.
long	revision()	Returns the value of the revision record component.
final String	toString()	Returns a string representation of this record class.
WatchEvent.Type	type()	Returns the value of the type record component.
@Nullable String	value()	Returns the value of the value record component.

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

WatchEvent

public WatchEvent(WatchEvent.Type type,
 String key,
 @Nullable String value,
 @Nullable String prevValue,
 long revision,
 long modRevision)

Creates an instance of a WatchEvent record class.

Parameters:

type - the value for the type record component

key - the value for the key record component

value - the value for the value record component

prevValue - the value for the prevValue record component

revision - the value for the revision record component

modRevision - the value for the modRevision record component

Method Details

toString

public final String toString()

Returns a string representation of this record class. The representation contains the name of the class, followed by the name and value of each of the record components.

Specified by:

toString in class Record

Returns:

a string representation of this object

hashCode

public final int hashCode()

Returns a hash code value for this object. The value is derived from the hash code of each of the record components.

Specified by:

hashCode in class Record

Returns:

a hash code value for this object

equals

public final boolean equals(Object o)

Indicates whether some other object is "equal to" this one. The objects are equal if the other object is of the same class and if all the record components are equal. Reference components are compared with Objects::equals(Object,Object); primitive components are compared with the compare method from their corresponding wrapper classes.

Specified by:

equals in class Record

Parameters:

o - the object with which to compare

Returns:

true if this object is the same as the o argument; false otherwise.

type

public WatchEvent.Type type()

Returns the value of the type record component.

Returns:

the value of the type record component

key

public String key()

Returns the value of the key record component.

Returns:

the value of the key record component

value

public @Nullable String value()

Returns the value of the value record component.

Returns:

the value of the value record component

prevValue

public @Nullable String prevValue()

Returns the value of the prevValue record component.

Returns:

the value of the prevValue record component

revision

public long revision()

Returns the value of the revision record component.

Returns:

the value of the revision record component

modRevision

public long modRevision()

Returns the value of the modRevision record component.

Returns:

the value of the modRevision record component