api.patch

From 06233f3598074f1287db92610b96bb5b88b21c4c Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Wed, 27 Mar 2019 21:58:55 -0400
Subject: [PATCH] Backport Server Tick Events

Fires event at start and end of a server tick
---
 .../event/server/ServerTickEndEvent.java      | 56 +++++++++++++++++++
 .../event/server/ServerTickStartEvent.java    | 29 ++++++++++
 2 files changed, 85 insertions(+)
 create mode 100644 src/main/java/com/destroystokyo/paper/event/server/ServerTickEndEvent.java
 create mode 100644 src/main/java/com/destroystokyo/paper/event/server/ServerTickStartEvent.java

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 00000000..e16c093a
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/event/server/ServerTickEndEvent.java
@@ -0,0 +1,56 @@
+package com.destroystokyo.paper.event.server;
+
+import org.bukkit.event.Event;
+import org.bukkit.event.HandlerList;
+
+/**
+ * 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();
+    }
+
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    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 00000000..6aa0d1fe
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/event/server/ServerTickStartEvent.java
@@ -0,0 +1,29 @@
+package com.destroystokyo.paper.event.server;
+
+import org.bukkit.event.Event;
+import org.bukkit.event.HandlerList;
+
+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;
+    }
+
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+}
-- 
2.26.2

server.patch

From a48fbd1f9b2d5b0b1705a801db3df64784140409 Mon Sep 17 00:00:00 2001
From: Andrew Steinborn <git@steinborn.me>
Date: Sun, 26 Apr 2020 13:48:30 -0400
Subject: [PATCH] Backport Server Tick Events

---
 src/main/java/net/minecraft/server/MinecraftServer.java | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 132bc5221..e1e8025bd 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -669,7 +669,13 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IAs
                     }
                     lastTick = curTime;
 
+                    // Imagine Start - backport tick events from Paper
+                    new com.destroystokyo.paper.event.server.ServerTickStartEvent(this.ticks+1).callEvent();
                     this.C();
+                    long endTime = System.nanoTime();
+                    long remaining = (TICK_TIME - (endTime - lastTick)) - catchupTime;
+                    new com.destroystokyo.paper.event.server.ServerTickEndEvent(this.ticks, ((double)(endTime - lastTick) / 1000000D), remaining).callEvent(); // Imagine
+                    // Imagine End
                     this.Q = true;
                 }
                 // Spigot end
-- 
2.26.2