1 files changed, 63 insertions, 0 deletions
diff --git a/java/com/android/dialer/common/concurrent/DialerExecutorFactory.java b/java/com/android/dialer/common/concurrent/DialerExecutorFactory.java
new file mode 100644
index 000000000..82f8c7c3d
--- /dev/null
+++ b/java/com/android/dialer/common/concurrent/DialerExecutorFactory.java
@@ -0,0 +1,63 @@
+/*
+ * 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.concurrent.DialerExecutor.Worker;
+
+/**
+ * Factory interface for creating {@link DialerExecutor} objects.
+ *
+ * <p>Factory instances may be used instead of the static methods in {@link DialerExecutors} in
+ * order to improve testability.
+ *
+ * @see DialerExecutors
+ */
+public interface DialerExecutorFactory {
+
+  /**
+   * Must be called from onCreate of your activity or fragment.
+   *
+   * @param taskId used for the headless fragment ID and task ID
+   * @param worker a function executed on a worker thread which accepts an {@link InputT} and
+   *     returns an {@link OutputT}. It should ideally not be an inner class of your (meaning it
+   *     should not be a lambda, anonymous, or non-static) but it can be a static nested class. The
+   *     static nested class should not contain any reference to UI, including any activity or
+   *     fragment or activity context, though it may reference some threadsafe system objects such
+   *     as the application context.
+   */
+  @NonNull
+  <InputT, OutputT> DialerExecutor.Builder<InputT, OutputT> createUiTaskBuilder(
+      @NonNull FragmentManager fragmentManager,
+      @NonNull String taskId,
+      @NonNull Worker<InputT, OutputT> worker);
+
+  /**
+   * Create a task from a non-UI context.
+   *
+   * @param worker a function executed on a worker thread which accepts an {@link InputT} and
+   *     returns an {@link OutputT}. It should ideally not be an inner class of your (meaning it
+   *     should not be a lambda, anonymous, or non-static) but it can be a static nested class. The
+   *     static nested class should not contain any reference to UI, including any activity or
+   *     fragment or activity context, though it may reference some threadsafe system objects such
+   *     as the application context.
+   */
+  @NonNull
+  <InputT, OutputT> DialerExecutor.Builder<InputT, OutputT> createNonUiTaskBuilder(
+      @NonNull Worker<InputT, OutputT> worker);
+}