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109 lines
5.8 KiB
Diff
109 lines
5.8 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: egg82 <phantom_zero@ymail.com>
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Date: Tue, 7 Aug 2018 01:24:23 -0600
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Subject: [PATCH] Use ConcurrentHashMap in JsonList
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This is specifically aimed at fixing #471
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Using a ConcurrentHashMap because thread safety
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The performance benefit of Map over ConcurrentMap is negligabe at best in this scenaio, as most operations will be get and not add or remove
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Even without considering the use-case the benefits are still negligable
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Original ideas for the system included an expiration policy and/or handler
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The simpler solution was to use a computeIfPresent in the get method
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This will simultaneously have an O(1) lookup time and automatically expire any values
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Since the get method (nor other similar methods) don't seem to have a critical need to flush the map to disk at any of these points further processing is simply wasteful
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Meaning the original function expired values unrelated to the current value without actually having any explicit need to
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The h method was heavily modified to be much more efficient in its processing
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Also instead of being called on every get, it's now called just before a save
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This will eliminate stale values being flushed to disk
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Modified isEmpty to use the isEmpty() method instead of the slightly confusing size() < 1
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The point of this is readability, but does have a side-benefit of a small microptimization
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diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
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index 3273c3f06c142d4e3c947ca846459f4a8e5eefd8..940896725c32981ddd2d5a23d72a87ba3e5e0fee 100644
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--- a/src/main/java/net/minecraft/server/players/PlayerList.java
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+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
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@@ -634,7 +634,7 @@ public abstract class PlayerList {
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} else if (!this.isWhiteListed(gameprofile, event)) { // Paper - ProfileWhitelistVerifyEvent
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//ichatmutablecomponent = Component.translatable("multiplayer.disconnect.not_whitelisted"); // Paper
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//event.disallow(PlayerLoginEvent.Result.KICK_WHITELIST, net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(org.spigotmc.SpigotConfig.whitelistMessage)); // Spigot // Paper - Adventure - moved to isWhitelisted
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- } else if (this.getIpBans().isBanned(socketaddress) && !this.getIpBans().get(socketaddress).hasExpired()) {
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+ } else if (this.getIpBans().isBanned(socketaddress) && getIpBans().get(socketaddress) != null && !this.getIpBans().get(socketaddress).hasExpired()) { // Paper - fix NPE with temp ip bans
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IpBanListEntry ipbanentry = this.ipBans.get(socketaddress);
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ichatmutablecomponent = Component.translatable("multiplayer.disconnect.banned_ip.reason", ipbanentry.getReason());
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diff --git a/src/main/java/net/minecraft/server/players/StoredUserList.java b/src/main/java/net/minecraft/server/players/StoredUserList.java
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index 7e81907bfdca225413e8191e37969990e6f4cf2c..c038da20b76c0b7b1c18471b20be01e849d29f3a 100644
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--- a/src/main/java/net/minecraft/server/players/StoredUserList.java
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+++ b/src/main/java/net/minecraft/server/players/StoredUserList.java
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@@ -30,7 +30,7 @@ public abstract class StoredUserList<K, V extends StoredUserEntry<K>> {
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private static final Logger LOGGER = LogUtils.getLogger();
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private static final Gson GSON = (new GsonBuilder()).setPrettyPrinting().create();
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private final File file;
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- private final Map<String, V> map = Maps.newHashMap();
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+ private final Map<String, V> map = Maps.newConcurrentMap(); // Paper - Use ConcurrentHashMap in JsonList
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public StoredUserList(File file) {
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this.file = file;
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@@ -53,8 +53,11 @@ public abstract class StoredUserList<K, V extends StoredUserEntry<K>> {
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@Nullable
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public V get(K key) {
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- this.removeExpired();
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- return (V) this.map.get(this.getKeyForUser(key)); // CraftBukkit - fix decompile error
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+ // Paper start - Use ConcurrentHashMap in JsonList
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+ return (V) this.map.computeIfPresent(this.getKeyForUser(key), (k, v) -> {
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+ return v.hasExpired() ? null : v;
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+ });
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+ // Paper end - Use ConcurrentHashMap in JsonList
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}
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public void remove(K key) {
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@@ -77,7 +80,7 @@ public abstract class StoredUserList<K, V extends StoredUserEntry<K>> {
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}
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public boolean isEmpty() {
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- return this.map.size() < 1;
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+ return this.map.isEmpty(); // Paper - Use ConcurrentHashMap in JsonList
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}
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protected String getKeyForUser(K profile) {
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@@ -90,25 +93,7 @@ public abstract class StoredUserList<K, V extends StoredUserEntry<K>> {
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}
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private void removeExpired() {
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- List<K> list = Lists.newArrayList();
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- Iterator iterator = this.map.values().iterator();
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-
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- while (iterator.hasNext()) {
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- V v0 = (V) iterator.next(); // CraftBukkit - decompile error
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-
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- if (v0.hasExpired()) {
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- list.add(v0.getUser());
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- }
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- }
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-
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- iterator = list.iterator();
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-
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- while (iterator.hasNext()) {
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- K k0 = (K) iterator.next(); // CraftBukkit - decompile error
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-
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- this.map.remove(this.getKeyForUser(k0));
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- }
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-
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+ this.map.values().removeIf(StoredUserEntry::hasExpired); // Paper - Use ConcurrentHashMap in JsonList
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}
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protected abstract StoredUserEntry<K> createEntry(JsonObject json);
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@@ -118,6 +103,7 @@ public abstract class StoredUserList<K, V extends StoredUserEntry<K>> {
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}
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public void save() throws IOException {
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+ this.removeExpired(); // Paper - remove expired values before saving
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JsonArray jsonarray = new JsonArray();
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Stream<JsonObject> stream = this.map.values().stream().map((jsonlistentry) -> { // CraftBukkit - decompile error
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JsonObject jsonobject = new JsonObject();
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