(Telecom-system part 3) Adding Telecom Loader Service

Bug: 18112269
Change-Id: I85ab03156bf906fdc72b459c4c68240ab3bf1894

1 files changed, 106 insertions, 0 deletions

diff --git a/services/core/java/com/android/server/telecom/TelecomLoaderService.java b/services/core/java/com/android/server/telecom/TelecomLoaderService.java
new file mode 100644
index 0000000..64a67fc
--- /dev/null
+++ b/services/core/java/com/android/server/telecom/TelecomLoaderService.java
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2014 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.server.telecom;
+
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.ServiceConnection;
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+import android.os.UserHandle;
+import android.util.Slog;
+
+import com.android.server.SystemService;
+
+/**
+ * Starts the telecom component by binding to its ITelecomService implementation. Telecom is setup
+ * to run in the system-server process so once it is loaded into memory it will stay running.
+ * @hide
+ */
+public class TelecomLoaderService extends SystemService {
+    private static final String TAG = "TelecomLoaderService";
+
+    private class TelecomServiceConnection implements ServiceConnection {
+        @Override
+        public void onServiceConnected(ComponentName name, IBinder service) {
+            // Normally, we would listen for death here, but since telecom runs in the same process
+            // as this loader (process="system") thats redundant here.
+            try {
+                service.linkToDeath(new IBinder.DeathRecipient() {
+                    @Override
+                    public void binderDied() {
+                        connectToTelecom();
+                    }
+                }, 0);
+
+                ServiceManager.addService(Context.TELECOM_SERVICE, service);
+            } catch (RemoteException e) {
+                Slog.w(TAG, "Failed linking to death.");
+            }
+        }
+
+        @Override
+        public void onServiceDisconnected(ComponentName name) {
+            connectToTelecom();
+        }
+    }
+
+    private static final ComponentName SERVICE_COMPONENT = new ComponentName(
+            "com.android.server.telecom",
+            "com.android.server.telecom.TelecomService");
+
+    private static final String SERVICE_ACTION = "com.android.ITelecomService";
+
+    private final Context mContext;
+    private TelecomServiceConnection mServiceConnection;
+
+    public TelecomLoaderService(Context context) {
+        super(context);
+        mContext = context;
+    }
+
+    @Override
+    public void onStart() {
+    }
+
+    @Override
+    public void onBootPhase(int phase) {
+        if (phase == PHASE_ACTIVITY_MANAGER_READY) {
+            connectToTelecom();
+        }
+    }
+
+    private void connectToTelecom() {
+        if (mServiceConnection != null) {
+            // TODO: Is unbinding worth doing or wait for system to rebind?
+            mContext.unbindService(mServiceConnection);
+            mServiceConnection = null;
+        }
+
+        TelecomServiceConnection serviceConnection = new TelecomServiceConnection();
+        Intent intent = new Intent(SERVICE_ACTION);
+        intent.setComponent(SERVICE_COMPONENT);
+        int flags = Context.BIND_IMPORTANT | Context.BIND_AUTO_CREATE;
+
+        // Bind to Telecom and register the service
+        if (mContext.bindServiceAsUser(intent, serviceConnection, flags, UserHandle.OWNER)) {
+            mServiceConnection = serviceConnection;
+        }
+    }
+}