content: /*
   * Copyright (C) 2016 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.internal.telephony;
  
  import android.os.SystemClock;
  import android.telephony.ClientRequestStats;
  
  import com.android.internal.annotations.VisibleForTesting;
  
  import java.io.PrintWriter;
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  
  public class ClientWakelockTracker {
      public static final String LOG_TAG = "ClientWakelockTracker";
      @VisibleForTesting
      public HashMap<String, ClientWakelockAccountant> mClients =
          new HashMap<String, ClientWakelockAccountant>();
      @VisibleForTesting
      public ArrayList<ClientWakelockAccountant> mActiveClients = new ArrayList<>();
  
      @VisibleForTesting
      public void startTracking(String clientId, int requestId, int token, int numRequestsInQueue) {
          ClientWakelockAccountant client = getClientWakelockAccountant(clientId);
          long uptime = SystemClock.uptimeMillis();
          client.startAttributingWakelock(requestId, token, numRequestsInQueue, uptime);
          updateConcurrentRequests(numRequestsInQueue, uptime);
          synchronized (mActiveClients) {
              if (!mActiveClients.contains(client)) {
                  mActiveClients.add(client);
              }
          }
      }
  
      @VisibleForTesting
      public void stopTracking(String clientId, int requestId, int token, int numRequestsInQueue) {
          ClientWakelockAccountant client = getClientWakelockAccountant(clientId);
          long uptime = SystemClock.uptimeMillis();
          client.stopAttributingWakelock(requestId, token, uptime);
          if(client.getPendingRequestCount() == 0) {
              synchronized (mActiveClients) {
                  mActiveClients.remove(client);
              }
          }
          updateConcurrentRequests(numRequestsInQueue, uptime);
      }
  
      @VisibleForTesting
      public void stopTrackingAll() {
          long uptime = SystemClock.uptimeMillis();
          synchronized (mActiveClients) {
              for (ClientWakelockAccountant client : mActiveClients) {
                  client.stopAllPendingRequests(uptime);
              }
              mActiveClients.clear();
          }
      }
  
      List<ClientRequestStats> getClientRequestStats() {
          List<ClientRequestStats> list;
          long uptime = SystemClock.uptimeMillis();
          synchronized (mClients) {
              list = new ArrayList<>(mClients.size());
              for (String key :  mClients.keySet()) {
                  ClientWakelockAccountant client = mClients.get(key);
                  client.updatePendingRequestWakelockTime(uptime);
                  list.add(new ClientRequestStats(client.mRequestStats));
              }
          }
          return list;
      }
  
      private ClientWakelockAccountant getClientWakelockAccountant(String clientId) {
          ClientWakelockAccountant client;
          synchronized (mClients) {
              if (mClients.containsKey(clientId)) {
                  client = mClients.get(clientId);
              } else {
                  client = new ClientWakelockAccountant(clientId);
                  mClients.put(clientId, client);
              }
          }
          return client;
      }
  
      private void updateConcurrentRequests(int numRequestsInQueue, long time) {
          if(numRequestsInQueue != 0) {
              synchronized (mActiveClients) {
                  for (ClientWakelockAccountant cI : mActiveClients) {
                      cI.changeConcurrentRequests(numRequestsInQueue, time);
                  }
              }
          }
      }
  
      public boolean isClientActive(String clientId) {
          ClientWakelockAccountant client = getClientWakelockAccountant(clientId);
          synchronized (mActiveClients) {
              if (mActiveClients.contains(client)) {
                  return true;
              }
          }
  
          return false;
      }
  
      void dumpClientRequestTracker(PrintWriter pw) {
          pw.println("-------mClients---------------");
          synchronized (mClients) {
              for (String key : mClients.keySet()) {
                  pw.println("Client : " + key);
                  pw.println(mClients.get(key).toString());
              }
          }
      }
  }
  