Server Tick Events

Fires event at start and end of a server tick

Spigot-API-Patches/0180-Server-Tick-Events.patch

@@ -0,0 +1,113 @@
+From f32b76ea1ec40f3380f2e0bf20b294c3358f4092 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Wed, 27 Mar 2019 21:58:55 -0400
+Subject: [PATCH] Server Tick Events
+
+Fires event at start and end of a server tick
+
+diff --git a/src/main/java/com/destroystokyo/paper/event/server/ServerTickEndEvent.java b/src/main/java/com/destroystokyo/paper/event/server/ServerTickEndEvent.java
+new file mode 100644
+index 000000000..9fd28e036
+--- /dev/null
++++ b/src/main/java/com/destroystokyo/paper/event/server/ServerTickEndEvent.java
+@@ -0,0 +1,59 @@
++package com.destroystokyo.paper.event.server;
++
++import org.bukkit.event.Event;
++import org.bukkit.event.HandlerList;
++import org.jetbrains.annotations.NotNull;
++
++/**
++ * Called when the server has finished ticking the main loop
++ */
++public class ServerTickEndEvent extends Event {
++
++    private static final HandlerList handlers = new HandlerList();
++    private final int tickNumber;
++    private final double tickDuration;
++    private final long timeEnd;
++
++    public ServerTickEndEvent(int tickNumber, double tickDuration, long timeRemaining) {
++        this.tickNumber = tickNumber;
++        this.tickDuration = tickDuration;
++        this.timeEnd = System.nanoTime() + timeRemaining;
++    }
++
++    /**
++     * @return What tick this was since start (first tick = 1)
++     */
++    public int getTickNumber() {
++        return tickNumber;
++    }
++
++    /**
++     * @return Time in milliseconds of how long this tick took
++     */
++    public double getTickDuration() {
++        return tickDuration;
++    }
++
++    /**
++     * Amount of nanoseconds remaining before the next tick should start.
++     *
++     * If this value is negative, then that means the server has exceeded the tick time limit and TPS has been lost.
++     *
++     * Method will continously return the updated time remaining value. (return value is not static)
++     *
++     * @return Amount of nanoseconds remaining before the next tick should start
++     */
++    public long getTimeRemaining() {
++        return this.timeEnd - System.nanoTime();
++    }
++
++    @NotNull
++    public HandlerList getHandlers() {
++        return handlers;
++    }
++
++    @NotNull
++    public static HandlerList getHandlerList() {
++        return handlers;
++    }
++}
+diff --git a/src/main/java/com/destroystokyo/paper/event/server/ServerTickStartEvent.java b/src/main/java/com/destroystokyo/paper/event/server/ServerTickStartEvent.java
+new file mode 100644
+index 000000000..eac85f1f4
+--- /dev/null
++++ b/src/main/java/com/destroystokyo/paper/event/server/ServerTickStartEvent.java
+@@ -0,0 +1,32 @@
++package com.destroystokyo.paper.event.server;
++
++import org.bukkit.event.Event;
++import org.bukkit.event.HandlerList;
++import org.jetbrains.annotations.NotNull;
++
++public class ServerTickStartEvent extends Event {
++
++    private static final HandlerList handlers = new HandlerList();
++    private final int tickNumber;
++
++    public ServerTickStartEvent(int tickNumber) {
++        this.tickNumber = tickNumber;
++    }
++
++    /**
++     * @return What tick this is going be since start (first tick = 1)
++     */
++    public int getTickNumber() {
++        return tickNumber;
++    }
++
++    @NotNull
++    public HandlerList getHandlers() {
++        return handlers;
++    }
++
++    @NotNull
++    public static HandlerList getHandlerList() {
++        return handlers;
++    }
++}
+-- 
+2.21.0
+

Spigot-Server-Patches/0430-Server-Tick-Events.patch

@@ -0,0 +1,34 @@
+From a64fa8711ba3b64574459546673a90803f46011d Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Wed, 27 Mar 2019 22:48:45 -0400
+Subject: [PATCH] Server Tick Events
+
+Fires event at start and end of a server tick
+
+diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
+index b93fccf91..9a56afeb3 100644
+--- a/src/main/java/net/minecraft/server/MinecraftServer.java
++++ b/src/main/java/net/minecraft/server/MinecraftServer.java
+@@ -927,6 +927,7 @@ public abstract class MinecraftServer implements IAsyncTaskHandler, IMojangStati
+         co.aikar.timings.TimingsManager.FULL_SERVER_TICK.startTiming(); // Paper
+         this.slackActivityAccountant.tickStarted(); // Spigot
+         long i = SystemUtils.getMonotonicNanos(); long startTime = i; // Paper
++        new com.destroystokyo.paper.event.server.ServerTickStartEvent(this.ticks+1).callEvent(); // Paper
+ 
+         ++this.ticks;
+         if (this.S) {
+@@ -995,6 +996,11 @@ public abstract class MinecraftServer implements IAsyncTaskHandler, IMojangStati
+         PaperLightingQueue.processQueue(startTime); // Paper
+         expiringMaps.removeIf(ExpiringMap::clean); // Paper
+         this.slackActivityAccountant.tickEnded(l); // Spigot
++        // Paper start
++        long endTime = System.nanoTime();
++        long remaining = (TICK_TIME - (endTime - lastTick)) - catchupTime;
++        new com.destroystokyo.paper.event.server.ServerTickEndEvent(this.ticks, endTime - lastTick, remaining).callEvent();
++        // Paper end
+         co.aikar.timings.TimingsManager.FULL_SERVER_TICK.stopTiming(); // Paper
+     }
+ 
+-- 
+2.21.0
+