Registered annotations provider as a service instead of static class to avoid problems with projects disposal.

compiler/cli/src/org/jetbrains/jet/cli/jvm/K2JVMCompiler.java

@@ -208,7 +208,7 @@ public class K2JVMCompiler extends CLICompiler<K2JVMCompilerArguments, K2JVMComp
 
         if (arguments.annotations != null) {
             for (String root : Splitter.on(File.pathSeparatorChar).split(arguments.annotations)) {
-                JetCoreEnvironment.addExternalAnnotationsRoot(PathUtil.jarFileOrDirectoryToVirtualFile(new File(root)));
+                configuration.getEnvironment().addExternalAnnotationsRoot(PathUtil.jarFileOrDirectoryToVirtualFile(new File(root)));
             }
         }
     }

compiler/cli/src/org/jetbrains/jet/cli/jvm/compiler/JetCoreEnvironment.java

@@ -49,6 +49,7 @@ import java.util.List;
  */
 public class JetCoreEnvironment extends JavaCoreEnvironment {
     private final List<JetFile> sourceFiles = new ArrayList<JetFile>();
+    private final CoreAnnotationsProvider annotationsProvider;
 
     @NotNull
     public static JetCoreEnvironment createCoreEnvironmentForJS(Disposable disposable) {
@@ -88,13 +89,14 @@ public class JetCoreEnvironment extends JavaCoreEnvironment {
             addToClasspath(compilerDependencies.getJdkJar());
         }
 
+        annotationsProvider = new CoreAnnotationsProvider();
         if (compilerSpecialMode.includeJdkHeaders()) {
             for (VirtualFile root : compilerDependencies.getJdkHeaderRoots()) {
                 addLibraryRoot(root);
             }
         }
 
-        ExternalAnnotationsProvider.setInstance(new CoreAnnotationsProvider());
+        myProject.registerService(ExternalAnnotationsProvider.class, annotationsProvider);
 
         if (compilerSpecialMode.includeKotlinRuntime()) {
             addToClasspath(compilerDependencies.getRuntimeJar());
@@ -103,8 +105,8 @@ public class JetCoreEnvironment extends JavaCoreEnvironment {
         JetStandardLibrary.initialize(getProject());
     }
 
-    public static void addExternalAnnotationsRoot(@NotNull VirtualFile root) {
+    public void addExternalAnnotationsRoot(VirtualFile root) {
-        ((CoreAnnotationsProvider) ExternalAnnotationsProvider.getInstance()).addExternalAnnotationsRoot(root);
+        annotationsProvider.addExternalAnnotationsRoot(root);
     }
 
     public MockApplication getApplication() {

compiler/cli/src/org/jetbrains/jet/cli/jvm/compiler/KotlinToJVMBytecodeCompiler.java

@@ -81,7 +81,7 @@ public class KotlinToJVMBytecodeCompiler {
         }
 
         for (String annotationsRoot : moduleBuilder.getAnnotationsRoots()) {
-            JetCoreEnvironment.addExternalAnnotationsRoot(PathUtil.jarFileOrDirectoryToVirtualFile(new File(annotationsRoot)));
+            configuration.getEnvironment().addExternalAnnotationsRoot(PathUtil.jarFileOrDirectoryToVirtualFile(new File(annotationsRoot)));
         }
 
         GenerationState generationState = analyzeAndGenerate(configuration);

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/JavaDescriptorResolver.java

@@ -1617,7 +1617,7 @@ public class JavaDescriptorResolver implements DependencyClassByQualifiedNameRes
             result.addAll(Arrays.asList(list.getAnnotations()));
         }
 
-        PsiAnnotation[] externalAnnotations = ExternalAnnotationsProvider.getInstance().findExternalAnnotations(owner.getProject(), owner);
+        PsiAnnotation[] externalAnnotations = ExternalAnnotationsProvider.getInstance(owner.getProject()).findExternalAnnotations(owner);
         if (externalAnnotations != null) {
             result.addAll(Arrays.asList(externalAnnotations));
         }
@@ -1635,6 +1635,6 @@ public class JavaDescriptorResolver implements DependencyClassByQualifiedNameRes
             }
         }
 
-        return ExternalAnnotationsProvider.getInstance().findExternalAnnotation(owner.getProject(), owner, fqName);
+        return ExternalAnnotationsProvider.getInstance(owner.getProject()).findExternalAnnotation(owner, fqName);
     }
 }

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/extAnnotations/CoreAnnotationsProvider.java

@@ -105,13 +105,13 @@ public class CoreAnnotationsProvider extends ExternalAnnotationsProvider {
 
     @Override
     @Nullable
-    public PsiAnnotation findExternalAnnotation(@NotNull Project project, @NotNull final PsiModifierListOwner listOwner, @NotNull final String annotationFQN) {
+    public PsiAnnotation findExternalAnnotation(@NotNull final PsiModifierListOwner listOwner, @NotNull final String annotationFQN) {
         return collectExternalAnnotations(listOwner).get(annotationFQN);
     }
 
     @Override
     @Nullable
-    public PsiAnnotation[] findExternalAnnotations(@NotNull Project project, @NotNull final PsiModifierListOwner listOwner) {
+    public PsiAnnotation[] findExternalAnnotations(@NotNull final PsiModifierListOwner listOwner) {
         final Map<String, PsiAnnotation> result = collectExternalAnnotations(listOwner);
         return result.isEmpty() ? null : result.values().toArray(new PsiAnnotation[result.size()]);
     }

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/extAnnotations/ExternalAnnotationsProvider.java

@@ -16,6 +16,7 @@
 
 package org.jetbrains.jet.lang.resolve.java.extAnnotations;
 
+import com.intellij.openapi.components.ServiceManager;
 import com.intellij.openapi.project.Project;
 import com.intellij.psi.PsiAnnotation;
 import com.intellij.psi.PsiModifierListOwner;
@@ -29,20 +30,13 @@ import org.jetbrains.annotations.Nullable;
  */
 @Deprecated
 public abstract class ExternalAnnotationsProvider {
-    private static ExternalAnnotationsProvider instance;
+    @Nullable
+    public abstract PsiAnnotation findExternalAnnotation(@NotNull PsiModifierListOwner listOwner, @NotNull String annotationFQN);
 
     @Nullable
-    public abstract PsiAnnotation findExternalAnnotation(@NotNull Project project, @NotNull PsiModifierListOwner listOwner, @NotNull String annotationFQN);
+    public abstract PsiAnnotation[] findExternalAnnotations(@NotNull PsiModifierListOwner listOwner);
 
-    @Nullable
+    public static ExternalAnnotationsProvider getInstance(@NotNull Project project) {
-    public abstract PsiAnnotation[] findExternalAnnotations(@NotNull Project project, @NotNull PsiModifierListOwner listOwner);
+        return ServiceManager.getService(project, ExternalAnnotationsProvider.class);
-
-    @NotNull
-    public static ExternalAnnotationsProvider getInstance() {
-        return instance;
-    }
-
-    public static void setInstance(@NotNull ExternalAnnotationsProvider instance) {
-        ExternalAnnotationsProvider.instance = instance;
     }
 }

idea/src/META-INF/plugin.xml

@@ -8,12 +8,6 @@
 
   <depends optional="true">JUnit</depends>
 
-  <application-components>
-    <component>
-      <implementation-class>org.jetbrains.jet.plugin.extAnnotations.IdeaExternalAnnotationsProvider</implementation-class>
-    </component>
-  </application-components>
-
   <project-components>
       <component>
           <implementation-class>org.jetbrains.jet.plugin.JetStandardLibraryInitializer</implementation-class>
@@ -77,6 +71,9 @@
       <projectService serviceInterface="org.jetbrains.jet.lang.resolve.java.JetFilesProvider"
                       serviceImplementation="org.jetbrains.jet.plugin.project.PluginJetFilesProvider"/>
 
+      <projectService serviceInterface="org.jetbrains.jet.lang.resolve.java.extAnnotations.ExternalAnnotationsProvider"
+                      serviceImplementation="org.jetbrains.jet.plugin.extAnnotations.IdeaExternalAnnotationsProvider"/>
+
       <errorHandler implementation="org.jetbrains.jet.plugin.reporter.KotlinReportSubmitter"/>
 
       <internalFileTemplate name="Kotlin File"/>

idea/src/org/jetbrains/jet/plugin/extAnnotations/IdeaExternalAnnotationsProvider.java

@@ -31,29 +31,20 @@ import org.jetbrains.jet.lang.resolve.java.extAnnotations.ExternalAnnotationsPro
  * @since 6/26/12
  */
 @Deprecated
-public class IdeaExternalAnnotationsProvider extends ExternalAnnotationsProvider implements ApplicationComponent {
+public class IdeaExternalAnnotationsProvider extends ExternalAnnotationsProvider {
-    @Override
+    private final ExternalAnnotationsManager externalAnnotationsManager;
-    public PsiAnnotation findExternalAnnotation(@NotNull Project project, @NotNull PsiModifierListOwner listOwner, @NotNull String annotationFQN) {
+
-        return ExternalAnnotationsManager.getInstance(project).findExternalAnnotation(listOwner, annotationFQN);
+    public IdeaExternalAnnotationsProvider(ExternalAnnotationsManager externalAnnotationsManager) {
+        this.externalAnnotationsManager = externalAnnotationsManager;
     }
 
     @Override
-    public PsiAnnotation[] findExternalAnnotations(@NotNull Project project, @NotNull PsiModifierListOwner listOwner) {
+    public synchronized PsiAnnotation findExternalAnnotation(@NotNull PsiModifierListOwner listOwner, @NotNull String annotationFQN) {
-        return ExternalAnnotationsManager.getInstance(project).findExternalAnnotations(listOwner);
+        return externalAnnotationsManager.findExternalAnnotation(listOwner, annotationFQN);
     }
 
     @Override
-    public void initComponent() {
+    public synchronized PsiAnnotation[] findExternalAnnotations(@NotNull PsiModifierListOwner listOwner) {
-        ExternalAnnotationsProvider.setInstance(this);
+        return externalAnnotationsManager.findExternalAnnotations(listOwner);
-    }
-
-    @Override
-    public void disposeComponent() {
-    }
-
-    @NotNull
-    @Override
-    public String getComponentName() {
-        return getClass().getName();
     }
 }