michael@0: /*
michael@0:  * Copyright (C) 2013 Square, Inc.
michael@0:  *
michael@0:  * Licensed under the Apache License, Version 2.0 (the "License");
michael@0:  * you may not use this file except in compliance with the License.
michael@0:  * You may obtain a copy of the License at
michael@0:  *
michael@0:  *      http://www.apache.org/licenses/LICENSE-2.0
michael@0:  *
michael@0:  * Unless required by applicable law or agreed to in writing, software
michael@0:  * distributed under the License is distributed on an "AS IS" BASIS,
michael@0:  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
michael@0:  * See the License for the specific language governing permissions and
michael@0:  * limitations under the License.
michael@0:  */
michael@0: package com.squareup.picasso;
michael@0: 
michael@0: import android.net.ConnectivityManager;
michael@0: import android.net.NetworkInfo;
michael@0: import android.telephony.TelephonyManager;
michael@0: import java.util.concurrent.LinkedBlockingQueue;
michael@0: import java.util.concurrent.ThreadPoolExecutor;
michael@0: import java.util.concurrent.TimeUnit;
michael@0: 
michael@0: /**
michael@0:  * The default {@link java.util.concurrent.ExecutorService} used for new {@link Picasso} instances.
michael@0:  * <p/>
michael@0:  * Exists as a custom type so that we can differentiate the use of defaults versus a user-supplied
michael@0:  * instance.
michael@0:  */
michael@0: class PicassoExecutorService extends ThreadPoolExecutor {
michael@0:   private static final int DEFAULT_THREAD_COUNT = 3;
michael@0: 
michael@0:   PicassoExecutorService() {
michael@0:     super(DEFAULT_THREAD_COUNT, DEFAULT_THREAD_COUNT, 0, TimeUnit.MILLISECONDS,
michael@0:         new LinkedBlockingQueue<Runnable>(), new Utils.PicassoThreadFactory());
michael@0:   }
michael@0: 
michael@0:   void adjustThreadCount(NetworkInfo info) {
michael@0:     if (info == null || !info.isConnectedOrConnecting()) {
michael@0:       setThreadCount(DEFAULT_THREAD_COUNT);
michael@0:       return;
michael@0:     }
michael@0:     switch (info.getType()) {
michael@0:       case ConnectivityManager.TYPE_WIFI:
michael@0:       case ConnectivityManager.TYPE_WIMAX:
michael@0:       case ConnectivityManager.TYPE_ETHERNET:
michael@0:         setThreadCount(4);
michael@0:         break;
michael@0:       case ConnectivityManager.TYPE_MOBILE:
michael@0:         switch (info.getSubtype()) {
michael@0:           case TelephonyManager.NETWORK_TYPE_LTE:  // 4G
michael@0:           case TelephonyManager.NETWORK_TYPE_HSPAP:
michael@0:           case TelephonyManager.NETWORK_TYPE_EHRPD:
michael@0:             setThreadCount(3);
michael@0:             break;
michael@0:           case TelephonyManager.NETWORK_TYPE_UMTS: // 3G
michael@0:           case TelephonyManager.NETWORK_TYPE_CDMA:
michael@0:           case TelephonyManager.NETWORK_TYPE_EVDO_0:
michael@0:           case TelephonyManager.NETWORK_TYPE_EVDO_A:
michael@0:           case TelephonyManager.NETWORK_TYPE_EVDO_B:
michael@0:             setThreadCount(2);
michael@0:             break;
michael@0:           case TelephonyManager.NETWORK_TYPE_GPRS: // 2G
michael@0:           case TelephonyManager.NETWORK_TYPE_EDGE:
michael@0:             setThreadCount(1);
michael@0:             break;
michael@0:           default:
michael@0:             setThreadCount(DEFAULT_THREAD_COUNT);
michael@0:         }
michael@0:         break;
michael@0:       default:
michael@0:         setThreadCount(DEFAULT_THREAD_COUNT);
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   private void setThreadCount(int threadCount) {
michael@0:     setCorePoolSize(threadCount);
michael@0:     setMaximumPoolSize(threadCount);
michael@0:   }
michael@0: }