/*
* 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.openapi.application.ex;
import com.intellij.openapi.application.Application;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.progress.ProcessCanceledException;
import com.intellij.openapi.progress.ProgressIndicator;
import com.intellij.openapi.progress.ProgressManager;
import com.intellij.openapi.util.Computable;
import com.intellij.openapi.util.Ref;
import com.intellij.util.ExceptionUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.ide.PooledThreadExecutor;
import java.util.concurrent.*;
public class ApplicationUtil {
// throws exception if can't grab read action right now
public static <T> T tryRunReadAction(@NotNull final Computable<T> computable) throws CannotRunReadActionException {
final Ref<T> result = new Ref<>();
tryRunReadAction(() -> result.set(computable.compute()));
return result.get();
}
public static void tryRunReadAction(@NotNull final Runnable computable) throws CannotRunReadActionException {
if (!((ApplicationEx)ApplicationManager.getApplication()).tryRunReadAction(computable)) {
throw new CannotRunReadActionException();
}
}
/**
* Allows to interrupt a process which does not performs checkCancelled() calls by itself.
* Note that the process may continue to run in background indefinitely - so <b>avoid using this method unless absolutely needed</b>.
*/
public static <T> T runWithCheckCanceled(@NotNull final Callable<T> callable, @NotNull final ProgressIndicator indicator) throws Exception {
final Ref<T> result = Ref.create();
final Ref<Throwable> error = Ref.create();
Future<?> future = PooledThreadExecutor.INSTANCE.submit(() -> ProgressManager.getInstance().executeProcessUnderProgress(() -> {
try {
result.set(callable.call());
}
catch (Throwable t) {
error.set(t);
}
}, indicator));
while (true) {
try {
indicator.checkCanceled();
}
catch (ProcessCanceledException e) {
future.cancel(true);
throw e;
}
try {
future.get(200, TimeUnit.MILLISECONDS);
ExceptionUtil.rethrowAll(error.get());
return result.get();
}
catch (TimeoutException ignored) { }
}
}
public static void showDialogAfterWriteAction(@NotNull Runnable runnable) {
Application application = ApplicationManager.getApplication();
if (application.isWriteAccessAllowed()) {
application.invokeLater(runnable);
}
else {
runnable.run();
}
}
public static class CannotRunReadActionException extends ProcessCanceledException {
}
}