diff options
Diffstat (limited to 'java/com/android/dialer/common/concurrent/UiThreadExecutor.java')
-rw-r--r-- | java/com/android/dialer/common/concurrent/UiThreadExecutor.java | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/java/com/android/dialer/common/concurrent/UiThreadExecutor.java b/java/com/android/dialer/common/concurrent/UiThreadExecutor.java new file mode 100644 index 000000000..7b95d70ea --- /dev/null +++ b/java/com/android/dialer/common/concurrent/UiThreadExecutor.java @@ -0,0 +1,77 @@ +/* + * Copyright (C) 2017 The Android Open Source Project + * + * 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.android.dialer.common.concurrent; + +import com.google.common.util.concurrent.AbstractListeningExecutorService; +import com.google.common.util.concurrent.ListenableFuture; +import com.google.common.util.concurrent.SettableFuture; +import java.util.List; +import java.util.concurrent.Callable; +import java.util.concurrent.TimeUnit; + +/** + * An ExecutorService that delegates to the UI thread. Rejects attempts to shut down, and all + * shutdown related APIs are unimplemented. + * + */ +public class UiThreadExecutor extends AbstractListeningExecutorService { + + @Override + public void shutdown() { + throw new UnsupportedOperationException(); + } + + @Override + public List<Runnable> shutdownNow() { + throw new UnsupportedOperationException(); + } + + @Override + public boolean isShutdown() { + return false; + } + + @Override + public boolean isTerminated() { + return false; + } + + @Override + public boolean awaitTermination(long l, TimeUnit timeUnit) throws InterruptedException { + throw new UnsupportedOperationException(); + } + + @Override + public <V> ListenableFuture<V> submit(final Callable<V> task) { + final SettableFuture<V> resultFuture = SettableFuture.create(); + ThreadUtil.postOnUiThread( + () -> { + try { + resultFuture.set(task.call()); + } catch (Exception e) { + // uncaught exceptions on the UI thread should crash the app + resultFuture.setException(e); + throw new RuntimeException(e); + } + }); + return resultFuture; + } + + @Override + public void execute(final Runnable runnable) { + ThreadUtil.postOnUiThread(runnable); + } +} |