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[java] module files change tracker - more lightweight instance cache (IDEA-CR-14933)

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Roman Shevchenko
2016-10-24 17:46:09 +02:00
parent 97d77de7e5
commit e68299027f
1 changed files with 12 additions and 11 deletions
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java/java-psi-impl/src/com/intellij/psi/impl/source/JavaModuleFileChangeTracker.java
+12 -11
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@@ -17,22 +17,23 @@ package com.intellij.psi.impl.source;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.ModificationTracker;
import com.intellij.openapi.util.NotNullLazyKey;
import com.intellij.psi.*;
import com.intellij.psi.util.CachedValueProvider;
import com.intellij.psi.util.CachedValuesManager;
import com.intellij.util.NotNullFunction;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
public class JavaModuleFileChangeTracker implements ModificationTracker {
private static final NotNullLazyKey<ModificationTracker, Project> KEY = NotNullLazyKey.create("", new NotNullFunction<Project, ModificationTracker>() {
@NotNull
@Override
public ModificationTracker fun(Project project) {
return new JavaModuleFileChangeTracker(project);
}
});
@NotNull
public static ModificationTracker getInstance(@NotNull final Project p) {
return CachedValuesManager.getManager(p).getCachedValue(p, new CachedValueProvider<JavaModuleFileChangeTracker>() {
@Nullable
@Override
public Result<JavaModuleFileChangeTracker> compute() {
return Result.create(new JavaModuleFileChangeTracker(p), NEVER_CHANGED);
}
});
public static ModificationTracker getInstance(@NotNull Project p) {
return KEY.getValue(p);
}
private volatile long myCount = 0;