Package com.helix.core.cache.l4

Class RedisLuaScripts

java.lang.Object

com.helix.core.cache.l4.RedisLuaScripts

public final class RedisLuaScripts
extends Object

Atomic Redis Lua scripts for concurrency-safe rule caching and stampede prevention.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	FETCH_OR_LOCK	Atomic fetch-or-lock pattern: KEYS[1]: rule bytecode key (e.g.
static final String	STORE_AND_NOTIFY	Stores compiled bytecode, sets expiration TTL, deletes the compilation lease lock, and publishes an update event on the cluster notification channel.

Method Summary

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

FETCH_OR_LOCK

public static final String FETCH_OR_LOCK

Atomic fetch-or-lock pattern: KEYS[1]: rule bytecode key (e.g. "helix:rule:") ARGV[1]: lock TTL in milliseconds (e.g. "5000") Returns a 2-element table: - {1, bytecode} if cached entry is found - {2, "LOCKED"} if lock successfully acquired (caller must compile) - {3, "WAIT"} if lock is already held by another node (caller must wait)

See Also:

• Constant Field Values

STORE_AND_NOTIFY

public static final String STORE_AND_NOTIFY

Stores compiled bytecode, sets expiration TTL, deletes the compilation lease lock, and publishes an update event on the cluster notification channel. KEYS[1]: rule bytecode key KEYS[2]: notification channel ARGV[1]: bytecode payload ARGV[2]: TTL in seconds

See Also:

• Constant Field Values