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https://github.com/PaperMC/Paper.git
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Improve MT-Safety of UserCache (#2080)
We were missing a synchronize on a get if cached method, however it appears that using a ConcurrentHashMap is a better solution so readers can avoid locking if they just want a cached value. Existing synchronization for writers remains untouched, the ConcurrentHashMap is just so readers can safely read without synchronization
This commit is contained in:
Spottedleaf
Zach
parent
5dc46cd3b2
commit
7fb12d787e
@ -1,4 +1,4 @@
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From a712ddf77ea7d2397deccb4fe233072b5926649f Mon Sep 17 00:00:00 2001
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From a29caf1df2a8c7f8a6201b61dd3487c7525829e5 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Mon, 16 May 2016 20:47:41 -0400
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Subject: [PATCH] Optimize UserCache / Thread Safe
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@ -10,7 +10,7 @@ Additionally, move Saving of the User cache to be done async, incase
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the user never changed the default setting for Spigot's save on stop only.
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diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
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index a3c53d9dbf..3b745b2b75 100644
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index d3d8fffeb0..f142ed9a3b 100644
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--- a/src/main/java/net/minecraft/server/MinecraftServer.java
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+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
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@@ -739,7 +739,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
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@ -23,9 +23,20 @@ index a3c53d9dbf..3b745b2b75 100644
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// Spigot end
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}
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diff --git a/src/main/java/net/minecraft/server/UserCache.java b/src/main/java/net/minecraft/server/UserCache.java
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index 41be5bf64e..cd8a652eb6 100644
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index 41be5bf64e..dc5c0afab4 100644
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--- a/src/main/java/net/minecraft/server/UserCache.java
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+++ b/src/main/java/net/minecraft/server/UserCache.java
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@@ -43,8 +43,8 @@ public class UserCache {
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public static final SimpleDateFormat a = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss Z");
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private static boolean c;
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- private final Map<String, UserCache.UserCacheEntry> d = Maps.newHashMap();
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- private final Map<UUID, UserCache.UserCacheEntry> e = Maps.newHashMap();
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+ private final Map<String, UserCache.UserCacheEntry> d = new java.util.concurrent.ConcurrentHashMap<>(); // Paper
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+ private final Map<UUID, UserCache.UserCacheEntry> e = new java.util.concurrent.ConcurrentHashMap<>(); // Paper
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private final Deque<GameProfile> f = new java.util.concurrent.LinkedBlockingDeque<GameProfile>(); // CraftBukkit
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private final GameProfileRepository g;
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protected final Gson b;
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@@ -108,7 +108,7 @@ public class UserCache {
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this.a(gameprofile, (Date) null);
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}
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@ -55,17 +66,14 @@ index 41be5bf64e..cd8a652eb6 100644
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String s1 = s.toLowerCase(Locale.ROOT);
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UserCache.UserCacheEntry usercache_usercacheentry = (UserCache.UserCacheEntry) this.d.get(s1);
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@@ -164,8 +165,9 @@ public class UserCache {
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@@ -164,6 +165,7 @@ public class UserCache {
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return usercache_usercacheentry == null ? null : usercache_usercacheentry.a();
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}
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+ @Nullable public GameProfile getProfile(UUID uuid) { return a(uuid); } // Paper - OBFHELPER
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@Nullable
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- public GameProfile a(UUID uuid) {
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+ public synchronized GameProfile a(UUID uuid) { // Paper - synchronize
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public GameProfile a(UUID uuid) {
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UserCache.UserCacheEntry usercache_usercacheentry = (UserCache.UserCacheEntry) this.e.get(uuid);
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return usercache_usercacheentry == null ? null : usercache_usercacheentry.a();
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@@ -220,8 +222,15 @@ public class UserCache {
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}
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@ -1,4 +1,4 @@
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From 57495dc921d915f3ccc76d8c3b55ad9826165fc8 Mon Sep 17 00:00:00 2001
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From 769191c6a329f12bc0b71fb682ab228bd5181e34 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Mon, 15 Jan 2018 22:11:48 -0500
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Subject: [PATCH] Basic PlayerProfile API
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@ -7,7 +7,7 @@ Establishes base extension of profile systems for future edits too
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diff --git a/src/main/java/com/destroystokyo/paper/profile/CraftPlayerProfile.java b/src/main/java/com/destroystokyo/paper/profile/CraftPlayerProfile.java
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new file mode 100644
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index 000000000..b151a13c1
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index 0000000000..b151a13c1b
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--- /dev/null
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+++ b/src/main/java/com/destroystokyo/paper/profile/CraftPlayerProfile.java
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@@ -0,0 +1,280 @@
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@ -293,7 +293,7 @@ index 000000000..b151a13c1
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+}
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diff --git a/src/main/java/com/destroystokyo/paper/profile/PaperAuthenticationService.java b/src/main/java/com/destroystokyo/paper/profile/PaperAuthenticationService.java
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new file mode 100644
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index 000000000..25836b975
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index 0000000000..25836b975b
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--- /dev/null
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+++ b/src/main/java/com/destroystokyo/paper/profile/PaperAuthenticationService.java
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@@ -0,0 +1,30 @@
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@ -329,7 +329,7 @@ index 000000000..25836b975
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+}
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diff --git a/src/main/java/com/destroystokyo/paper/profile/PaperGameProfileRepository.java b/src/main/java/com/destroystokyo/paper/profile/PaperGameProfileRepository.java
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new file mode 100644
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index 000000000..3bcdb8f93
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index 0000000000..3bcdb8f93f
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--- /dev/null
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+++ b/src/main/java/com/destroystokyo/paper/profile/PaperGameProfileRepository.java
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@@ -0,0 +1,17 @@
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@ -352,7 +352,7 @@ index 000000000..3bcdb8f93
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+}
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diff --git a/src/main/java/com/destroystokyo/paper/profile/PaperMinecraftSessionService.java b/src/main/java/com/destroystokyo/paper/profile/PaperMinecraftSessionService.java
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new file mode 100644
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index 000000000..4b2a67423
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index 0000000000..4b2a67423f
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--- /dev/null
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+++ b/src/main/java/com/destroystokyo/paper/profile/PaperMinecraftSessionService.java
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@@ -0,0 +1,29 @@
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@ -387,7 +387,7 @@ index 000000000..4b2a67423
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+}
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diff --git a/src/main/java/com/destroystokyo/paper/profile/PaperUserAuthentication.java b/src/main/java/com/destroystokyo/paper/profile/PaperUserAuthentication.java
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new file mode 100644
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index 000000000..3aceb0ea8
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index 0000000000..3aceb0ea8a
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--- /dev/null
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+++ b/src/main/java/com/destroystokyo/paper/profile/PaperUserAuthentication.java
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@@ -0,0 +1,11 @@
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@ -403,7 +403,7 @@ index 000000000..3aceb0ea8
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+ }
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+}
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diff --git a/src/main/java/net/minecraft/server/MCUtil.java b/src/main/java/net/minecraft/server/MCUtil.java
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index 1f6a12632..6d278a0da 100644
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index 1f6a126329..6d278a0da5 100644
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--- a/src/main/java/net/minecraft/server/MCUtil.java
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+++ b/src/main/java/net/minecraft/server/MCUtil.java
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@@ -1,7 +1,10 @@
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@ -429,7 +429,7 @@ index 1f6a12632..6d278a0da 100644
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* Calculates distance between 2 entities
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* @param e1
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diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
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index cdf162a95..d909ad682 100644
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index 6b83f9769a..5817e94525 100644
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--- a/src/main/java/net/minecraft/server/MinecraftServer.java
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+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
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@@ -1246,7 +1246,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
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@ -450,16 +450,16 @@ index cdf162a95..d909ad682 100644
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return this.minecraftSessionService;
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}
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diff --git a/src/main/java/net/minecraft/server/UserCache.java b/src/main/java/net/minecraft/server/UserCache.java
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index 409bc6da9..9eaf1539f 100644
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index fd17a3e93a..d88a510bd0 100644
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--- a/src/main/java/net/minecraft/server/UserCache.java
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+++ b/src/main/java/net/minecraft/server/UserCache.java
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@@ -43,7 +43,7 @@ public class UserCache {
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public static final SimpleDateFormat a = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss Z");
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private static boolean c;
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- private final Map<String, UserCache.UserCacheEntry> d = Maps.newHashMap();
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+ private final Map<String, UserCache.UserCacheEntry> d = Maps.newHashMap();private final Map<String, UserCache.UserCacheEntry> nameCache = d; // Paper - OBFHELPER
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private final Map<UUID, UserCache.UserCacheEntry> e = Maps.newHashMap();
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- private final Map<String, UserCache.UserCacheEntry> d = new java.util.concurrent.ConcurrentHashMap<>(); // Paper
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+ private final Map<String, UserCache.UserCacheEntry> d = new java.util.concurrent.ConcurrentHashMap<>();private final Map<String, UserCache.UserCacheEntry> nameCache = d; // Paper - OBFHELPER // Paper
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private final Map<UUID, UserCache.UserCacheEntry> e = new java.util.concurrent.ConcurrentHashMap<>(); // Paper
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private final Deque<GameProfile> f = new java.util.concurrent.LinkedBlockingDeque<GameProfile>(); // CraftBukkit
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private final GameProfileRepository g;
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@@ -165,6 +165,13 @@ public class UserCache {
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@ -475,7 +475,7 @@ index 409bc6da9..9eaf1539f 100644
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+
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@Nullable public GameProfile getProfile(UUID uuid) { return a(uuid); } // Paper - OBFHELPER
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@Nullable
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public synchronized GameProfile a(UUID uuid) { // Paper - synchronize
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public GameProfile a(UUID uuid) {
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@@ -274,7 +281,7 @@ public class UserCache {
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class UserCacheEntry {
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@ -486,7 +486,7 @@ index 409bc6da9..9eaf1539f 100644
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private UserCacheEntry(GameProfile gameprofile, Date date) {
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diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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index 44acc6a5f..cdf3b6b6c 100644
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index a79403cbce..8f7fd3490f 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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@@ -196,6 +196,9 @@ import org.yaml.snakeyaml.error.MarkedYAMLException;
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