1 files changed, 93 insertions, 0 deletions
diff --git a/platform/vcs-api/vcs-api-core/src/com/intellij/lifecycle/PeriodicalTasksCloser.java b/platform/vcs-api/vcs-api-core/src/com/intellij/lifecycle/PeriodicalTasksCloser.java
new file mode 100644
index 000000000000..3b6a7ff2a5c6
--- /dev/null
+++ b/platform/vcs-api/vcs-api-core/src/com/intellij/lifecycle/PeriodicalTasksCloser.java
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2000-2014 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.intellij.lifecycle;
+
+import com.intellij.openapi.application.ApplicationManager;
+import com.intellij.openapi.components.ApplicationComponent;
+import com.intellij.openapi.components.ServiceManager;
+import com.intellij.openapi.diagnostic.Logger;
+import com.intellij.openapi.progress.ProcessCanceledException;
+import com.intellij.openapi.project.Project;
+import com.intellij.vcsUtil.Rethrow;
+import org.jetbrains.annotations.NotNull;
+
+public class PeriodicalTasksCloser implements ApplicationComponent {
+  private static final Logger LOG = Logger.getInstance("#com.intellij.lifecycle.PeriodicalTasksCloser");
+  private final Object myLock = new Object();
+
+  public static PeriodicalTasksCloser getInstance() {
+    return ApplicationManager.getApplication().getComponent(PeriodicalTasksCloser.class);
+  }
+
+  @Override
+  public void disposeComponent() {
+  }
+
+  @NotNull
+  @Override
+  public String getComponentName() {
+    return PeriodicalTasksCloser.class.getName();
+  }
+
+  @Override
+  public void initComponent() {
+  }
+
+  public <T> T safeGetComponent(@NotNull final Project project, final Class<T> componentClass) throws ProcessCanceledException {
+    T component = null;
+    try {
+      component = project.getComponent(componentClass);
+    }
+    catch (NullPointerException e) {
+      throwCanceledException(project, e);
+    } catch (AssertionError e) {
+      throwCanceledException(project, e);
+    }
+    if (component == null) {
+      if (project.isDefault()) {
+        LOG.info("no component in default project: " + componentClass.getName());
+      }
+      throwCanceledException(project, new NullPointerException());
+    }
+    return component;
+  }
+
+  public <T> T safeGetService(@NotNull final Project project, final Class<T> componentClass) throws ProcessCanceledException {
+    try {
+      T service = ServiceManager.getService(project, componentClass);
+      if (service == null && project.isDefault()) {
+        LOG.info("no service in default project: " + componentClass.getName());
+      }
+      return service;
+    }
+    catch (NullPointerException e) {
+      throwCanceledException(project, e);
+    } catch (AssertionError e) {
+      throwCanceledException(project, e);
+    }
+    return null;
+  }
+
+  private void throwCanceledException(final Project project, final Throwable t) {
+    synchronized (myLock) {
+      // allow NPE & assertion _catch_ only if project is closed and being disposed
+      if (project.isOpen()) {
+        Rethrow.reThrowRuntime(t);
+      }
+    }
+    throw new ProcessCanceledException();
+  }
+}