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make myLanguages thread-safe, optimization: reduce garbage

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GitOrigin-RevId: b1d67c86b2779ee6be889c602b2a8d952b65fce3
This commit is contained in:
Alexey Kudravtsev
2023-08-31 16:27:59 +00:00
committed by intellij-monorepo-bot
parent e9891bc1ae
commit 2da4d92224
1 changed files with 10 additions and 17 deletions
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java/java-analysis-api/src/com/intellij/uast/UastMetaLanguage.java
+10 -17
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@@ -4,36 +4,29 @@ package com.intellij.uast;
import com.intellij.java.analysis.JavaAnalysisBundle;
import com.intellij.lang.Language;
import com.intellij.lang.MetaLanguage;
import com.intellij.util.containers.ContainerUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Unmodifiable;
import org.jetbrains.uast.UastLanguagePlugin;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
public final class UastMetaLanguage extends MetaLanguage {
static final class Holder {
private static final Set<Language> myLanguages;
private static volatile @Unmodifiable Set<Language> myLanguages = initLanguages();
static {
Collection<UastLanguagePlugin> languagePlugins = UastLanguagePlugin.Companion.getInstances();
myLanguages = new HashSet<>(languagePlugins.size());
initLanguages(languagePlugins);
UastLanguagePlugin.Companion.getExtensionPointName().addChangeListener(() -> {
myLanguages.clear();
initLanguages(UastLanguagePlugin.Companion.getInstances());
}, null);
UastLanguagePlugin.Companion.getExtensionPointName().addChangeListener(() -> myLanguages = initLanguages(), null);
}
private static void initLanguages(Collection<UastLanguagePlugin> languagePlugins) {
for (UastLanguagePlugin plugin : languagePlugins) {
myLanguages.add(plugin.getLanguage());
}
@NotNull
private static @Unmodifiable Set<Language> initLanguages() {
return Set.of(ContainerUtil.map2Array(UastLanguagePlugin.Companion.getInstances(), Language.EMPTY_ARRAY, plugin -> plugin.getLanguage()));
}
public static Set<Language> getLanguages() {
@NotNull
static Set<Language> getLanguages() {
return myLanguages;
}
}
@@ -50,7 +43,7 @@ public final class UastMetaLanguage extends MetaLanguage {
@NotNull
@Override
public Collection<Language> getMatchingLanguages() {
return Collections.unmodifiableSet(Holder.myLanguages);
return Holder.myLanguages;
}
@Override