1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.ddmuilib.logcat; 17 18 import com.android.ddmlib.AndroidDebugBridge; 19 import com.android.ddmlib.AndroidDebugBridge.IDeviceChangeListener; 20 import com.android.ddmlib.IDevice; 21 22 import org.eclipse.jface.preference.IPreferenceStore; 23 24 import java.util.HashMap; 25 import java.util.Map; 26 27 /** 28 * A factory for {@link LogCatReceiver} objects. Its primary objective is to cache 29 * constructed {@link LogCatReceiver}'s per device and hand them back when requested. 30 */ 31 public class LogCatReceiverFactory { 32 /** Singleton instance. */ 33 public static final LogCatReceiverFactory INSTANCE = new LogCatReceiverFactory(); 34 35 private Map<String, LogCatReceiver> mReceiverCache = new HashMap<String, LogCatReceiver>(); 36 37 /** Private constructor: cannot instantiate. */ LogCatReceiverFactory()38 private LogCatReceiverFactory() { 39 AndroidDebugBridge.addDeviceChangeListener(new IDeviceChangeListener() { 40 public void deviceDisconnected(IDevice device) { 41 removeReceiverFor(device); 42 } 43 44 public void deviceConnected(IDevice device) { 45 } 46 47 public void deviceChanged(IDevice device, int changeMask) { 48 } 49 }); 50 } 51 removeReceiverFor(IDevice device)52 private synchronized void removeReceiverFor(IDevice device) { 53 mReceiverCache.remove(device.getSerialNumber()); 54 } 55 newReceiver(IDevice device, IPreferenceStore prefs)56 public synchronized LogCatReceiver newReceiver(IDevice device, IPreferenceStore prefs) { 57 LogCatReceiver r = mReceiverCache.get(device.getSerialNumber()); 58 if (r != null) { 59 return r; 60 } 61 62 r = new LogCatReceiver(device, prefs); 63 mReceiverCache.put(device.getSerialNumber(), r); 64 return r; 65 } 66 } 67