bounded task executor now available as executor service

platform/util/src/com/intellij/util/concurrency/BoundedTaskExecutor.java

@@ -57,9 +57,14 @@ public class BoundedTaskExecutor implements Executor {
     submit(task);
   }
 
-  @NotNull
+
   public Future<?> submit(@NotNull Runnable task) {
-    final RunnableFuture<Void> future = queueTask(new FutureTask<Void>(task, null));
+    return this.<Void>submit(task, null);
+  }
+
+  @NotNull
+  public <T> Future<T> submit(Runnable task, T result) {
+    final RunnableFuture<T> future = queueTask(new FutureTask<T>(task, result));
     if (future == null) {
       throw new RuntimeException("Failed to queue task: " + task);
     }

platform/util/src/com/intellij/util/concurrency/BoundedTaskExecutorService.java

@@ -0,0 +1,159 @@
+/*
+ * Copyright 2000-2015 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.util.concurrency;
+
+import com.intellij.util.SmartList;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.concurrent.*;
+
+/**
+ * @author Eugene Zhuravlev
+ *         Date: 16-Sep-15
+ */
+public class BoundedTaskExecutorService extends BoundedTaskExecutor implements ExecutorService{
+
+  public BoundedTaskExecutorService(@NotNull ExecutorService backendExecutor, int maxSimultaneousTasks) {
+    super(backendExecutor, maxSimultaneousTasks);
+  }
+
+  @Override
+  public void shutdown() {
+    getBackendExecutor().shutdown();
+  }
+
+  @NotNull
+  @Override
+  public List<Runnable> shutdownNow() {
+    return getBackendExecutor().shutdownNow();
+  }
+
+  @Override
+  public boolean isShutdown() {
+    return getBackendExecutor().isShutdown();
+  }
+
+  @Override
+  public boolean isTerminated() {
+    return getBackendExecutor().isTerminated();
+  }
+
+  @Override
+  public boolean awaitTermination(long timeout, TimeUnit unit) throws InterruptedException {
+    return getBackendExecutor().awaitTermination(timeout, unit);
+  }
+
+  @NotNull
+  @Override
+  public <T> List<Future<T>> invokeAll(Collection<? extends Callable<T>> tasks) throws InterruptedException {
+    final List<Future<T>> futures = new SmartList<Future<T>>();
+    for (Callable<T> task : tasks) {
+      futures.add(submit(task));
+    }
+    boolean done = false;
+    try {
+      for (Future<T> future : futures) {
+        if (!future.isDone()) {
+          try {
+            future.get();
+          }
+          catch (ExecutionException ignored) {
+          }
+        }
+      }
+      done = true;
+      return futures;
+    }
+    finally {
+      if (!done) {
+        for (Future<T> future : futures) {
+          future.cancel(true);
+        }
+      }
+    }
+  }
+
+  @NotNull
+  @Override
+  public <T> List<Future<T>> invokeAll(Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit) throws InterruptedException {
+    long nanos = unit.toNanos(timeout);
+    final List<Future<T>> futures = new SmartList<Future<T>>();
+
+    boolean done = false;
+    try {
+      long lastCheck = System.nanoTime();
+
+      for (Callable<T> task : tasks) {
+        futures.add(submit(task));
+      }
+
+      long now = System.nanoTime();
+      nanos -= now - lastCheck;
+      if (nanos <= 0) {
+        return futures;
+      }
+      lastCheck = now;
+
+      for (Future<T> future : futures) {
+        if (!future.isDone()) {
+          if (nanos <= 0) {
+            return futures;
+          }
+          try {
+            future.get(nanos, TimeUnit.NANOSECONDS);
+          }
+          catch (ExecutionException ignored) {
+          }
+          catch (TimeoutException e) {
+            return futures;
+          }
+          now = System.nanoTime();
+          nanos -= now - lastCheck;
+          lastCheck = now;
+        }
+      }
+      done = true;
+      return futures;
+    }
+    finally {
+      if (!done) {
+        for (Future<T> future : futures) {
+          future.cancel(true);
+        }
+      }
+    }
+  }
+
+  @Override
+  public <T> T invokeAny(Collection<? extends Callable<T>> tasks) throws InterruptedException, ExecutionException {
+    throw new RuntimeException("invokeAny is not supported by this ExecutorService implementation");
+  }
+
+
+  @Override
+  public <T> T invokeAny(Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit)
+    throws InterruptedException, ExecutionException, TimeoutException {
+    throw new RuntimeException("invokeAny is not supported by this ExecutorService implementation");
+  }
+
+  @NotNull
+  private ExecutorService getBackendExecutor() {
+    return (ExecutorService)myBackendExecutor;
+  }
+
+}