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dcs-sdk-java-master/app/src/main/java/com/baidu/duer/dcs/androidsystemimpl/alert/AlertsFileDataStoreImpl.java@45:2aa9f933c8d2, 2017-07-18 (annotated)

Committer:
TMBOY
Date:
Tue Jul 18 16:34:48 2017 +0800
Revision:
45:2aa9f933c8d2
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Who changed what in which revision?

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TMBOY 45:2aa9f933c8d2 1 /*
TMBOY 45:2aa9f933c8d2 2 * Copyright (c) 2017 Baidu, Inc. All Rights Reserved.
TMBOY 45:2aa9f933c8d2 3 *
TMBOY 45:2aa9f933c8d2 4 * Licensed under the Apache License, Version 2.0 (the "License");
TMBOY 45:2aa9f933c8d2 5 * you may not use this file except in compliance with the License.
TMBOY 45:2aa9f933c8d2 6 * You may obtain a copy of the License at
TMBOY 45:2aa9f933c8d2 7 *
TMBOY 45:2aa9f933c8d2 8 * http://www.apache.org/licenses/LICENSE-2.0
TMBOY 45:2aa9f933c8d2 9 *
TMBOY 45:2aa9f933c8d2 10 * Unless required by applicable law or agreed to in writing, software
TMBOY 45:2aa9f933c8d2 11 * distributed under the License is distributed on an "AS IS" BASIS,
TMBOY 45:2aa9f933c8d2 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
TMBOY 45:2aa9f933c8d2 13 * See the License for the specific language governing permissions and
TMBOY 45:2aa9f933c8d2 14 * limitations under the License.
TMBOY 45:2aa9f933c8d2 15 */
TMBOY 45:2aa9f933c8d2 16 package com.baidu.duer.dcs.androidsystemimpl.alert;
TMBOY 45:2aa9f933c8d2 17
TMBOY 45:2aa9f933c8d2 18 import android.os.Handler;
TMBOY 45:2aa9f933c8d2 19
TMBOY 45:2aa9f933c8d2 20 import com.baidu.duer.dcs.devicemodule.alerts.message.Alert;
TMBOY 45:2aa9f933c8d2 21 import com.baidu.duer.dcs.systeminterface.IAlertsDataStore;
TMBOY 45:2aa9f933c8d2 22 import com.baidu.duer.dcs.util.CommonUtil;
TMBOY 45:2aa9f933c8d2 23 import com.baidu.duer.dcs.util.FileUtil;
TMBOY 45:2aa9f933c8d2 24 import com.baidu.duer.dcs.util.LogUtil;
TMBOY 45:2aa9f933c8d2 25 import com.baidu.duer.dcs.util.ObjectMapperUtil;
TMBOY 45:2aa9f933c8d2 26
TMBOY 45:2aa9f933c8d2 27 import org.codehaus.jackson.map.ObjectReader;
TMBOY 45:2aa9f933c8d2 28 import org.codehaus.jackson.map.ObjectWriter;
TMBOY 45:2aa9f933c8d2 29 import org.codehaus.jackson.type.TypeReference;
TMBOY 45:2aa9f933c8d2 30
TMBOY 45:2aa9f933c8d2 31 import java.io.BufferedReader;
TMBOY 45:2aa9f933c8d2 32 import java.io.File;
TMBOY 45:2aa9f933c8d2 33 import java.io.FileNotFoundException;
TMBOY 45:2aa9f933c8d2 34 import java.io.FileReader;
TMBOY 45:2aa9f933c8d2 35 import java.io.IOException;
TMBOY 45:2aa9f933c8d2 36 import java.io.PrintWriter;
TMBOY 45:2aa9f933c8d2 37 import java.util.List;
TMBOY 45:2aa9f933c8d2 38 import java.util.concurrent.ExecutorService;
TMBOY 45:2aa9f933c8d2 39 import java.util.concurrent.Executors;
TMBOY 45:2aa9f933c8d2 40
TMBOY 45:2aa9f933c8d2 41 /**
TMBOY 45:2aa9f933c8d2 42 * 持久化alert数据到文件-android中实现
TMBOY 45:2aa9f933c8d2 43 * <p>
TMBOY 45:2aa9f933c8d2 44 * Created by guxiuzhong@baidu.com on 2017/5/18.
TMBOY 45:2aa9f933c8d2 45 */
TMBOY 45:2aa9f933c8d2 46 public class AlertsFileDataStoreImpl implements IAlertsDataStore {
TMBOY 45:2aa9f933c8d2 47 private static final String TAG = AlertsFileDataStoreImpl.class.getSimpleName();
TMBOY 45:2aa9f933c8d2 48 private static final ExecutorService mExecutor = Executors.newSingleThreadExecutor();
TMBOY 45:2aa9f933c8d2 49 private Handler mHandler = new Handler();
TMBOY 45:2aa9f933c8d2 50
TMBOY 45:2aa9f933c8d2 51 public AlertsFileDataStoreImpl() {
TMBOY 45:2aa9f933c8d2 52 }
TMBOY 45:2aa9f933c8d2 53
TMBOY 45:2aa9f933c8d2 54 @Override
TMBOY 45:2aa9f933c8d2 55 public void readFromDisk(final IAlertsDataStore.ReadResultListener listener) {
TMBOY 45:2aa9f933c8d2 56 mExecutor.execute(new Runnable() {
TMBOY 45:2aa9f933c8d2 57 @Override
TMBOY 45:2aa9f933c8d2 58 public void run() {
TMBOY 45:2aa9f933c8d2 59 FileReader fis;
TMBOY 45:2aa9f933c8d2 60 BufferedReader br = null;
TMBOY 45:2aa9f933c8d2 61 ObjectReader reader = ObjectMapperUtil.instance()
TMBOY 45:2aa9f933c8d2 62 .getObjectReader()
TMBOY 45:2aa9f933c8d2 63 .withType(new TypeReference<List<Alert>>() {
TMBOY 45:2aa9f933c8d2 64 });
TMBOY 45:2aa9f933c8d2 65 try {
TMBOY 45:2aa9f933c8d2 66 File file = FileUtil.getAlarmFile();
TMBOY 45:2aa9f933c8d2 67 if (file == null) {
TMBOY 45:2aa9f933c8d2 68 postReadFailed(listener, "create file failed file is null");
TMBOY 45:2aa9f933c8d2 69 return;
TMBOY 45:2aa9f933c8d2 70 }
TMBOY 45:2aa9f933c8d2 71 fis = new FileReader(file);
TMBOY 45:2aa9f933c8d2 72 br = new BufferedReader(fis);
TMBOY 45:2aa9f933c8d2 73 List<Alert> alerts = reader.readValue(br);
TMBOY 45:2aa9f933c8d2 74 postReadSucceed(listener, alerts);
TMBOY 45:2aa9f933c8d2 75 } catch (final FileNotFoundException e) {
TMBOY 45:2aa9f933c8d2 76 postReadFailed(listener, "Failed to load alerts from disk.");
TMBOY 45:2aa9f933c8d2 77 } catch (IOException e) {
TMBOY 45:2aa9f933c8d2 78 postReadFailed(listener, e.getMessage());
TMBOY 45:2aa9f933c8d2 79 } finally {
TMBOY 45:2aa9f933c8d2 80 CommonUtil.closeQuietly(br);
TMBOY 45:2aa9f933c8d2 81 }
TMBOY 45:2aa9f933c8d2 82 }
TMBOY 45:2aa9f933c8d2 83 });
TMBOY 45:2aa9f933c8d2 84 }
TMBOY 45:2aa9f933c8d2 85
TMBOY 45:2aa9f933c8d2 86 private void postReadFailed(final IAlertsDataStore.ReadResultListener listener, final String errorMessage) {
TMBOY 45:2aa9f933c8d2 87 if (listener != null) {
TMBOY 45:2aa9f933c8d2 88 mHandler.post(new Runnable() {
TMBOY 45:2aa9f933c8d2 89 @Override
TMBOY 45:2aa9f933c8d2 90 public void run() {
TMBOY 45:2aa9f933c8d2 91 listener.onFailed(errorMessage);
TMBOY 45:2aa9f933c8d2 92 }
TMBOY 45:2aa9f933c8d2 93 });
TMBOY 45:2aa9f933c8d2 94 }
TMBOY 45:2aa9f933c8d2 95 }
TMBOY 45:2aa9f933c8d2 96
TMBOY 45:2aa9f933c8d2 97 private void postReadSucceed(final IAlertsDataStore.ReadResultListener listener, final List<Alert> alerts) {
TMBOY 45:2aa9f933c8d2 98 if (listener != null) {
TMBOY 45:2aa9f933c8d2 99 mHandler.post(new Runnable() {
TMBOY 45:2aa9f933c8d2 100 @Override
TMBOY 45:2aa9f933c8d2 101 public void run() {
TMBOY 45:2aa9f933c8d2 102 listener.onSucceed(alerts);
TMBOY 45:2aa9f933c8d2 103 }
TMBOY 45:2aa9f933c8d2 104 });
TMBOY 45:2aa9f933c8d2 105 }
TMBOY 45:2aa9f933c8d2 106 }
TMBOY 45:2aa9f933c8d2 107
TMBOY 45:2aa9f933c8d2 108 @Override
TMBOY 45:2aa9f933c8d2 109 public void writeToDisk(final List<Alert> alerts, final IAlertsDataStore.WriteResultListener listener) {
TMBOY 45:2aa9f933c8d2 110 mExecutor.execute(new Runnable() {
TMBOY 45:2aa9f933c8d2 111
TMBOY 45:2aa9f933c8d2 112 @Override
TMBOY 45:2aa9f933c8d2 113 public void run() {
TMBOY 45:2aa9f933c8d2 114 ObjectWriter writer = ObjectMapperUtil.instance().getObjectWriter();
TMBOY 45:2aa9f933c8d2 115 PrintWriter out = null;
TMBOY 45:2aa9f933c8d2 116 try {
TMBOY 45:2aa9f933c8d2 117 File file = FileUtil.getAlarmFile();
TMBOY 45:2aa9f933c8d2 118 if (file == null) {
TMBOY 45:2aa9f933c8d2 119 postWriteFailed(listener, "create file failed file is null ");
TMBOY 45:2aa9f933c8d2 120 return;
TMBOY 45:2aa9f933c8d2 121 }
TMBOY 45:2aa9f933c8d2 122 out = new PrintWriter(file);
TMBOY 45:2aa9f933c8d2 123 out.print(writer.writeValueAsString(alerts));
TMBOY 45:2aa9f933c8d2 124 out.flush();
TMBOY 45:2aa9f933c8d2 125 LogUtil.e(TAG, "start postWriteSucceed");
TMBOY 45:2aa9f933c8d2 126 postWriteSucceed(listener);
TMBOY 45:2aa9f933c8d2 127 } catch (IOException e) {
TMBOY 45:2aa9f933c8d2 128 LogUtil.e(TAG, "Failed to write to disk", e);
TMBOY 45:2aa9f933c8d2 129 postWriteFailed(listener, "Failed to write to disk,error:" + e.getMessage());
TMBOY 45:2aa9f933c8d2 130 } finally {
TMBOY 45:2aa9f933c8d2 131 CommonUtil.closeQuietly(out);
TMBOY 45:2aa9f933c8d2 132 }
TMBOY 45:2aa9f933c8d2 133 }
TMBOY 45:2aa9f933c8d2 134 });
TMBOY 45:2aa9f933c8d2 135 }
TMBOY 45:2aa9f933c8d2 136
TMBOY 45:2aa9f933c8d2 137 private void postWriteFailed(final IAlertsDataStore.WriteResultListener listener, final String errorMessage) {
TMBOY 45:2aa9f933c8d2 138 if (listener != null) {
TMBOY 45:2aa9f933c8d2 139 mHandler.post(new Runnable() {
TMBOY 45:2aa9f933c8d2 140 @Override
TMBOY 45:2aa9f933c8d2 141 public void run() {
TMBOY 45:2aa9f933c8d2 142 listener.onFailed(errorMessage);
TMBOY 45:2aa9f933c8d2 143 }
TMBOY 45:2aa9f933c8d2 144 });
TMBOY 45:2aa9f933c8d2 145 }
TMBOY 45:2aa9f933c8d2 146 }
TMBOY 45:2aa9f933c8d2 147
TMBOY 45:2aa9f933c8d2 148 private void postWriteSucceed(final IAlertsDataStore.WriteResultListener listener) {
TMBOY 45:2aa9f933c8d2 149 if (listener != null) {
TMBOY 45:2aa9f933c8d2 150 mHandler.post(new Runnable() {
TMBOY 45:2aa9f933c8d2 151 @Override
TMBOY 45:2aa9f933c8d2 152 public void run() {
TMBOY 45:2aa9f933c8d2 153 listener.onSucceed();
TMBOY 45:2aa9f933c8d2 154 }
TMBOY 45:2aa9f933c8d2 155 });
TMBOY 45:2aa9f933c8d2 156 }
TMBOY 45:2aa9f933c8d2 157 }
TMBOY 45:2aa9f933c8d2 158 }