Move some system services to separate directories

Refactored the directory structure so that services can be optionally
excluded. This is step 1. Will be followed by another change that makes
it possible to remove services from the build.

Change-Id: Ideacedfd34b5e213217ad3ff4ebb21c4a8e73f85

1 files changed, 191 insertions, 0 deletions

diff --git a/services/core/java/com/android/server/wifi/WifiTrafficPoller.java b/services/core/java/com/android/server/wifi/WifiTrafficPoller.java
new file mode 100644
index 0000000..b498550
--- /dev/null
+++ b/services/core/java/com/android/server/wifi/WifiTrafficPoller.java
@@ -0,0 +1,191 @@
+/*
+ * Copyright (C) 2013 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.wifi;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.net.NetworkInfo;
+import static android.net.NetworkInfo.DetailedState.CONNECTED;
+import android.net.TrafficStats;
+import android.net.wifi.WifiManager;
+import android.os.Messenger;
+import android.os.RemoteException;
+import android.util.Log;
+import android.os.Handler;
+import android.os.Message;
+
+import java.io.FileDescriptor;
+import java.io.PrintWriter;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import com.android.internal.util.AsyncChannel;
+
+/* Polls for traffic stats and notifies the clients */
+final class WifiTrafficPoller {
+    /**
+     * Interval in milliseconds between polling for traffic
+     * statistics
+     */
+    private static final int POLL_TRAFFIC_STATS_INTERVAL_MSECS = 1000;
+
+    private static final int ENABLE_TRAFFIC_STATS_POLL  = 1;
+    private static final int TRAFFIC_STATS_POLL         = 2;
+    private static final int ADD_CLIENT                 = 3;
+    private static final int REMOVE_CLIENT              = 4;
+
+    private boolean mEnableTrafficStatsPoll = false;
+    private int mTrafficStatsPollToken = 0;
+    private long mTxPkts;
+    private long mRxPkts;
+    /* Tracks last reported data activity */
+    private int mDataActivity;
+
+    private final List<Messenger> mClients = new ArrayList<Messenger>();
+    // err on the side of updating at boot since screen on broadcast may be missed
+    // the first time
+    private AtomicBoolean mScreenOn = new AtomicBoolean(true);
+    private final TrafficHandler mTrafficHandler;
+    private NetworkInfo mNetworkInfo;
+    private final String mInterface;
+
+    WifiTrafficPoller(Context context, String iface) {
+        mInterface = iface;
+        mTrafficHandler = new TrafficHandler();
+
+        IntentFilter filter = new IntentFilter();
+        filter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);
+        filter.addAction(Intent.ACTION_SCREEN_OFF);
+        filter.addAction(Intent.ACTION_SCREEN_ON);
+
+        context.registerReceiver(
+                new BroadcastReceiver() {
+                    @Override
+                    public void onReceive(Context context, Intent intent) {
+                        if (intent.getAction().equals(
+                                WifiManager.NETWORK_STATE_CHANGED_ACTION)) {
+                            mNetworkInfo = (NetworkInfo) intent.getParcelableExtra(
+                                    WifiManager.EXTRA_NETWORK_INFO);
+                        } else if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
+                            mScreenOn.set(false);
+                        } else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
+                            mScreenOn.set(true);
+                        }
+                        evaluateTrafficStatsPolling();
+                    }
+                }, filter);
+    }
+
+    void addClient(Messenger client) {
+        Message.obtain(mTrafficHandler, ADD_CLIENT, client).sendToTarget();
+    }
+
+    void removeClient(Messenger client) {
+        Message.obtain(mTrafficHandler, REMOVE_CLIENT, client).sendToTarget();
+    }
+
+
+    private class TrafficHandler extends Handler {
+        public void handleMessage(Message msg) {
+            switch (msg.what) {
+                case ENABLE_TRAFFIC_STATS_POLL:
+                    mEnableTrafficStatsPoll = (msg.arg1 == 1);
+                    mTrafficStatsPollToken++;
+                    if (mEnableTrafficStatsPoll) {
+                        notifyOnDataActivity();
+                        sendMessageDelayed(Message.obtain(this, TRAFFIC_STATS_POLL,
+                                mTrafficStatsPollToken, 0), POLL_TRAFFIC_STATS_INTERVAL_MSECS);
+                    }
+                    break;
+                case TRAFFIC_STATS_POLL:
+                    if (msg.arg1 == mTrafficStatsPollToken) {
+                        notifyOnDataActivity();
+                        sendMessageDelayed(Message.obtain(this, TRAFFIC_STATS_POLL,
+                                mTrafficStatsPollToken, 0), POLL_TRAFFIC_STATS_INTERVAL_MSECS);
+                    }
+                    break;
+                case ADD_CLIENT:
+                    mClients.add((Messenger) msg.obj);
+                    break;
+                case REMOVE_CLIENT:
+                    mClients.remove(msg.obj);
+                    break;
+            }
+
+        }
+    }
+
+    private void evaluateTrafficStatsPolling() {
+        Message msg;
+        if (mNetworkInfo == null) return;
+        if (mNetworkInfo.getDetailedState() == CONNECTED && mScreenOn.get()) {
+            msg = Message.obtain(mTrafficHandler,
+                    ENABLE_TRAFFIC_STATS_POLL, 1, 0);
+        } else {
+            msg = Message.obtain(mTrafficHandler,
+                    ENABLE_TRAFFIC_STATS_POLL, 0, 0);
+        }
+        msg.sendToTarget();
+    }
+
+    private void notifyOnDataActivity() {
+        long sent, received;
+        long preTxPkts = mTxPkts, preRxPkts = mRxPkts;
+        int dataActivity = WifiManager.DATA_ACTIVITY_NONE;
+
+        mTxPkts = TrafficStats.getTxPackets(mInterface);
+        mRxPkts = TrafficStats.getRxPackets(mInterface);
+
+        if (preTxPkts > 0 || preRxPkts > 0) {
+            sent = mTxPkts - preTxPkts;
+            received = mRxPkts - preRxPkts;
+            if (sent > 0) {
+                dataActivity |= WifiManager.DATA_ACTIVITY_OUT;
+            }
+            if (received > 0) {
+                dataActivity |= WifiManager.DATA_ACTIVITY_IN;
+            }
+
+            if (dataActivity != mDataActivity && mScreenOn.get()) {
+                mDataActivity = dataActivity;
+                for (Messenger client : mClients) {
+                    Message msg = Message.obtain();
+                    msg.what = WifiManager.DATA_ACTIVITY_NOTIFICATION;
+                    msg.arg1 = mDataActivity;
+                    try {
+                        client.send(msg);
+                    } catch (RemoteException e) {
+                        // Failed to reach, skip
+                        // Client removal is handled in WifiService
+                    }
+                }
+            }
+        }
+    }
+
+    void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
+        pw.println("mEnableTrafficStatsPoll " + mEnableTrafficStatsPoll);
+        pw.println("mTrafficStatsPollToken " + mTrafficStatsPollToken);
+        pw.println("mTxPkts " + mTxPkts);
+        pw.println("mRxPkts " + mRxPkts);
+        pw.println("mDataActivity " + mDataActivity);
+    }
+
+}