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Make the plugin classloader a bit more thread safe to prevent class not found errors when a class is loaded at the same time from another thread.

This commit is contained in:
md_5 2013-01-24 09:33:34 +11:00
parent 059fcbc8bd
commit 0c9154899b
1 changed files with 65 additions and 0 deletions
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65
Bukkit-Patches/0004-Make-the-plugin-class-loader-thread-safe.patch Normal file
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@ -0,0 +1,65 @@
From a62dabb02fe7405059ceb42495ed5dbc9704c1ea Mon Sep 17 00:00:00 2001
From: snowleo <schneeleo@gmail.com>
Date: Wed, 17 Oct 2012 22:30:45 +0200
Subject: [PATCH] Make the plugin class loader thread safe
---
.../org/bukkit/plugin/java/JavaPluginLoader.java | 21 ++++++++++++---------
1 file changed, 12 insertions(+), 9 deletions(-)
diff --git a/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java b/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java
index 10fc26a..f9a09ef 100644
--- a/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java
+++ b/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java
@@ -45,6 +45,7 @@ import org.bukkit.plugin.UnknownDependencyException;
import org.yaml.snakeyaml.error.YAMLException;
import com.google.common.collect.ImmutableList;
+import java.util.concurrent.ConcurrentHashMap;
/**
* Represents a Java plugin loader, allowing plugins in the form of .jar
@@ -61,14 +62,14 @@ public class JavaPluginLoader implements PluginLoader {
@Deprecated
protected final Pattern[] fileFilters = fileFilters0;
- private final Map<String, Class<?>> classes0 = new HashMap<String, Class<?>>();
+ private final Map<String, Class<?>> classes0 = new ConcurrentHashMap<String, Class<?>>();
/**
* @deprecated Internal field that wasn't intended to be exposed
*/
@Deprecated
protected final Map<String, Class<?>> classes = classes0;
- private final Map<String, PluginClassLoader> loaders0 = new LinkedHashMap<String, PluginClassLoader>();
+ private final Map<String, PluginClassLoader> loaders0 = new ConcurrentHashMap<String, PluginClassLoader>();
/**
* @deprecated Internal field that wasn't intended to be exposed
*/
@@ -293,14 +294,16 @@ public class JavaPluginLoader implements PluginLoader {
if (cachedClass != null) {
return cachedClass;
} else {
- for (String current : loaders0.keySet()) {
- PluginClassLoader loader = loaders0.get(current);
+ synchronized (loaders) {
+ for (String current : loaders0.keySet()) {
+ PluginClassLoader loader = loaders0.get(current);
- try {
- cachedClass = loader.extended ? loader.findClass(name, false) : loader.findClass0(name, false); // Don't warn on deprecation, but maintain overridability
- } catch (ClassNotFoundException cnfe) {}
- if (cachedClass != null) {
- return cachedClass;
+ try {
+ cachedClass = loader.extended ? loader.findClass(name, false) : loader.findClass0(name, false); // Don't warn on deprecation, but maintain overridability
+ } catch (ClassNotFoundException cnfe) {}
+ if (cachedClass != null) {
+ return cachedClass;
+ }
}
}
}
--
1.8.1-rc2