1 files changed, 135 insertions, 0 deletions
diff --git a/android/media/TestServiceRegistry.java b/android/media/TestServiceRegistry.java
new file mode 100644
index 00000000..6f5512ef
--- /dev/null
+++ b/android/media/TestServiceRegistry.java
@@ -0,0 +1,135 @@
+/*
+ * Copyright 2018 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 android.media;
+
+import static org.junit.Assert.fail;
+
+import android.media.MediaSession2.ControllerInfo;
+import android.media.TestUtils.SyncHandler;
+import android.os.Handler;
+import android.os.Looper;
+import android.support.annotation.GuardedBy;
+
+/**
+ * Keeps the instance of currently running {@link MockMediaSessionService2}. And also provides
+ * a way to control them in one place.
+ * <p>
+ * It only support only one service at a time.
+ */
+public class TestServiceRegistry {
+    public interface ServiceInstanceChangedCallback {
+        void OnServiceInstanceChanged(MediaSessionService2 service);
+    }
+
+    @GuardedBy("TestServiceRegistry.class")
+    private static TestServiceRegistry sInstance;
+    @GuardedBy("TestServiceRegistry.class")
+    private MediaSessionService2 mService;
+    @GuardedBy("TestServiceRegistry.class")
+    private SyncHandler mHandler;
+    @GuardedBy("TestServiceRegistry.class")
+    private ControllerInfo mOnConnectControllerInfo;
+    @GuardedBy("TestServiceRegistry.class")
+    private ServiceInstanceChangedCallback mCallback;
+
+    public static TestServiceRegistry getInstance() {
+        synchronized (TestServiceRegistry.class) {
+            if (sInstance == null) {
+                sInstance = new TestServiceRegistry();
+            }
+            return sInstance;
+        }
+    }
+
+    public void setHandler(Handler handler) {
+        synchronized (TestServiceRegistry.class) {
+            mHandler = new SyncHandler(handler.getLooper());
+        }
+    }
+
+    public void setServiceInstanceChangedCallback(ServiceInstanceChangedCallback callback) {
+        synchronized (TestServiceRegistry.class) {
+            mCallback = callback;
+        }
+    }
+
+    public Handler getHandler() {
+        synchronized (TestServiceRegistry.class) {
+            return mHandler;
+        }
+    }
+
+    public void setServiceInstance(MediaSessionService2 service, ControllerInfo controller) {
+        synchronized (TestServiceRegistry.class) {
+            if (mService != null) {
+                fail("Previous service instance is still running. Clean up manually to ensure"
+                        + " previoulsy running service doesn't break current test");
+            }
+            mService = service;
+            mOnConnectControllerInfo = controller;
+            if (mCallback != null) {
+                mCallback.OnServiceInstanceChanged(service);
+            }
+        }
+    }
+
+    public MediaSessionService2 getServiceInstance() {
+        synchronized (TestServiceRegistry.class) {
+            return mService;
+        }
+    }
+
+    public ControllerInfo getOnConnectControllerInfo() {
+        synchronized (TestServiceRegistry.class) {
+            return mOnConnectControllerInfo;
+        }
+    }
+
+
+    public void cleanUp() {
+        synchronized (TestServiceRegistry.class) {
+            final ServiceInstanceChangedCallback callback = mCallback;
+            if (mService != null) {
+                try {
+                    if (mHandler.getLooper() == Looper.myLooper()) {
+                        mService.getSession().close();
+                    } else {
+                        mHandler.postAndSync(() -> {
+                            mService.getSession().close();
+                        });
+                    }
+                } catch (InterruptedException e) {
+                    // No-op. Service containing session will die, but shouldn't be a huge issue.
+                }
+                // stopSelf() would not kill service while the binder connection established by
+                // bindService() exists, and close() above will do the job instead.
+                // So stopSelf() isn't really needed, but just for sure.
+                mService.stopSelf();
+                mService = null;
+            }
+            if (mHandler != null) {
+                mHandler.removeCallbacksAndMessages(null);
+            }
+            mCallback = null;
+            mOnConnectControllerInfo = null;
+
+            if (callback != null) {
+                callback.OnServiceInstanceChanged(null);
+            }
+        }
+    }
+}