Update AOSP Dialer source from internal google3 repository at

cl/152373142.

Test: make, treehugger

This CL updates the AOSP Dialer source with all the changes that have
gone into the private google3 repository. This includes all the
changes from cl/151342913 (3/27/2017) to cl/152373142 (4/06/2017).

This goal of these drops is to keep the AOSP source in sync with the
internal google3 repository. Currently these sync are done by hand
with very minor modifications to the internal source code.
See the Android.mk file for list of modifications.
Our current goal is to do frequent drops (daily if possible) and
eventually switched to an automated process.

Change-Id: I2fbc88cf6867b90ac8b65f75e5e34468988c7217

1 files changed, 134 insertions, 0 deletions

diff --git a/java/com/android/dialer/common/concurrent/DialerExecutors.java b/java/com/android/dialer/common/concurrent/DialerExecutors.java
new file mode 100644
index 000000000..148d8660c
--- /dev/null
+++ b/java/com/android/dialer/common/concurrent/DialerExecutors.java
@@ -0,0 +1,134 @@
+/*
+ * 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 android.app.FragmentManager;
+import android.support.annotation.NonNull;
+import com.android.dialer.common.Assert;
+import com.android.dialer.common.concurrent.DialerExecutor.Worker;
+
+/**
+ * Factory methods for creating {@link DialerExecutor} objects for doing background work.
+ *
+ * <p>You may create an executor from a UI component (activity or fragment) or a non-UI component.
+ * Using this class provides a number of benefits:
+ *
+ * <ul>
+ *   <li>Ensures that UI tasks keep running across configuration changes by using a headless
+ *       fragment.
+ *   <li>Forces exceptions to crash the application, unless the user implements their own onFailure
+ *       method.
+ *   <li>Checks for dead UI components which can be encountered if a UI task runs longer than its
+ *       UI. If a dead UI component is encountered, onSuccess/onFailure are not called (because they
+ *       can't be) but a message is logged.
+ *   <li>Helps prevents memory leaks in UI tasks by ensuring that callbacks are nulled out when the
+ *       headless fragment is detached.
+ *   <li>UI and non-UI threads are shared across the application and run at reasonable priorities
+ * </ul>
+ *
+ * <p>Executors accept a single input and output parameter which should be immutable data objects.
+ * If you don't require an input or output, use Void and null as needed.
+ *
+ * <p>You may optionally specify onSuccess and onFailure listeners; the default behavior on success
+ * is a no-op and the default behavior on failure is to crash the application.
+ *
+ * <p>To use an executor from a UI component, you must create it in your onCreate method and then
+ * use it from anywhere:
+ *
+ * <pre><code>
+ *
+ * public class MyActivity extends Activity {
+ *
+ *   private final DialerExecutor&lt;MyInputType&gt; myExecutor;
+ *
+ *   public void onCreate(Bundle state) {
+ *     super.onCreate(bundle);
+ *
+ *     // Must be called in onCreate; don't use non-static or anonymous inner classes for worker!
+ *     myExecutor = DialerExecutors.createUiTaskBuilder(fragmentManager, taskId, worker)
+ *         .onSuccess(this::onSuccess)  // Lambdas, anonymous, or non-static inner classes all fine
+ *         .onFailure(this::onFailure)  // Lambdas, anonymous, or non-static inner classes all fine
+ *         .build();
+ *     );
+ *   }
+ *
+ *   private static class MyWorker implements Worker&lt;MyInputType, MyOutputType&gt; {
+ *     MyOutputType doInBackground(MyInputType input) { ... }
+ *   }
+ *   private void onSuccess(MyOutputType output) { ... }
+ *   private void onFailure(Throwable throwable) { ... }
+ *
+ *   private void userDidSomething() { myExecutor.executeParallel(input); }
+ * }
+ * </code></pre>
+ *
+ * <p>Usage for non-UI tasks is the same, except that tasks can be created from anywhere instead of
+ * in onCreate. Non-UI tasks use low-priority threads separate from the UI task threads so as not to
+ * compete with more critical UI tasks.
+ *
+ * <pre><code>
+ *
+ * public class MyManager {
+ *
+ *   private final DialerExecutor&lt;MyInputType&gt; myExecutor;
+ *
+ *   public void init() {
+ *     // Don't use non-static or anonymous inner classes for worker!
+ *     myExecutor = DialerExecutors.createNonUiTaskBuilder(worker)
+ *         .onSuccess(this::onSuccess)  // Lambdas, anonymous, or non-static inner classes all fine
+ *         .onFailure(this::onFailure)  // Lambdas, anonymous, or non-static inner classes all fine
+ *         .build();
+ *     );
+ *   }
+ *
+ *   private static class MyWorker implements Worker&lt;MyInputType, MyOutputType&gt; {
+ *     MyOutputType doInBackground(MyInputType input) { ... }
+ *   }
+ *   private void onSuccess(MyOutputType output) { ... }
+ *   private void onFailure(Throwable throwable) { ... }
+ *
+ *   private void userDidSomething() { myExecutor.executeParallel(input); }
+ * }
+ * </code></pre>
+ *
+ * Note that non-UI tasks are intended to be relatively quick; for example reading/writing shared
+ * preferences or doing simple database work. If you submit long running non-UI tasks you may
+ * saturate the shared application threads and block other tasks. Also, this class does not create
+ * any wakelocks, so a long running task could be killed if the device goes to sleep while your task
+ * is still running. If you have to do long running or periodic work, consider using a job
+ * scheduler.
+ */
+public final class DialerExecutors {
+
+  /** @see DialerExecutorFactory#createUiTaskBuilder(FragmentManager, String, Worker) */
+  @NonNull
+  public static <InputT, OutputT> DialerExecutor.Builder<InputT, OutputT> createUiTaskBuilder(
+      @NonNull FragmentManager fragmentManager,
+      @NonNull String taskId,
+      @NonNull Worker<InputT, OutputT> worker) {
+    return new DefaultDialerExecutorFactory()
+        .createUiTaskBuilder(
+            Assert.isNotNull(fragmentManager), Assert.isNotNull(taskId), Assert.isNotNull(worker));
+  }
+
+  /** @see DialerExecutorFactory#createNonUiTaskBuilder(Worker) */
+  @NonNull
+  public static <InputT, OutputT> DialerExecutor.Builder<InputT, OutputT> createNonUiTaskBuilder(
+      @NonNull Worker<InputT, OutputT> worker) {
+    return new DefaultDialerExecutorFactory().createNonUiTaskBuilder(Assert.isNotNull(worker));
+  }
+}