com.acer.batterycapacitydemo.DynamoDBManager.java Source code

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Here is the source code for com.acer.batterycapacitydemo.DynamoDBManager.java

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/*
 * Copyright 2010-2012 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 * 
 * or in the "license" file accompanying this file. This file 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.acer.batterycapacitydemo;

import android.util.Log;

import com.amazonaws.AmazonServiceException;
import com.amazonaws.mobileconnectors.dynamodbv2.dynamodbmapper.*;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient;
import com.amazonaws.services.dynamodbv2.model.DeleteTableRequest;
import com.amazonaws.services.dynamodbv2.model.DescribeTableRequest;
import com.amazonaws.services.dynamodbv2.model.DescribeTableResult;
import com.amazonaws.services.dynamodbv2.model.ResourceNotFoundException;

import java.util.ArrayList;

public class DynamoDBManager {

    private static final String TAG = "DynamoDBManager";

    /*
     * Creates a table with the following attributes: Table name: testTableName
     * Hash key: userNo type N Read Capacity Units: 10 Write Capacity Units: 5
     */
    public static void createTable() {

        Log.d(TAG, "Create table called");
        Log.d(TAG, "Skipped, using exist table");

    }

    /*
     * Retrieves the table description and returns the table status as a string.
     */
    public static String getTestTableStatus() {

        try {
            AmazonDynamoDBClient ddb = MainActivity.clientManager.ddb();

            DescribeTableRequest request = new DescribeTableRequest()
                    .withTableName(CognitoSyncClientManager.TEST_TABLE_NAME);
            DescribeTableResult result = ddb.describeTable(request);

            String status = result.getTable().getTableStatus();
            return status == null ? "" : status;

        } catch (ResourceNotFoundException e) {
        } catch (AmazonServiceException ex) {
            MainActivity.clientManager.wipeCredentialsOnAuthError(ex);
        }

        return "";
    }

    /*
     * Inserts ten users with userNo from 1 to 10 and random names.
     */
    public static void uploadBatteryInfo() {
        AmazonDynamoDBClient ddb = MainActivity.clientManager.ddb();
        DynamoDBMapper mapper = new DynamoDBMapper(ddb);

        try {

            UserPreference userPreference = new UserPreference();
            String currentTime = String.valueOf(System.currentTimeMillis());
            userPreference.setUniqueId(MainFragment.identityID + currentTime);
            userPreference.setUserId(MainFragment.identityID);
            userPreference.setTimestamp(currentTime);
            userPreference.setDeviceId(MainActivity.deviceId);
            userPreference.setBatteryInfo(BatteryLevel.batteryLevel);

            Log.d(TAG, "Inserting battery profile at " + currentTime);
            mapper.save(userPreference);
            Log.d(TAG, "Battery profile inserted");

        } catch (AmazonServiceException ex) {
            Log.e(TAG, "Error battery profile");
            MainActivity.clientManager.wipeCredentialsOnAuthError(ex);
        }
    }

    /*
     * Scans the table and returns the list of users.
     */
    public static ArrayList<UserPreference> getUserList() {

        AmazonDynamoDBClient ddb = MainActivity.clientManager.ddb();
        DynamoDBMapper mapper = new DynamoDBMapper(ddb);

        DynamoDBScanExpression scanExpression = new DynamoDBScanExpression();
        try {
            PaginatedScanList<UserPreference> result = mapper.scan(UserPreference.class, scanExpression);

            ArrayList<UserPreference> resultList = new ArrayList<UserPreference>();
            for (UserPreference up : result) {
                resultList.add(up);
            }
            return resultList;

        } catch (AmazonServiceException ex) {
            MainActivity.clientManager.wipeCredentialsOnAuthError(ex);
        }

        return null;
    }

    /*
     * Retrieves all of the attribute/value pairs for the specified user.
     */
    public static UserPreference getUserPreference(String userId) {

        AmazonDynamoDBClient ddb = MainActivity.clientManager.ddb();
        DynamoDBMapper mapper = new DynamoDBMapper(ddb);

        try {
            UserPreference userPreference = mapper.load(UserPreference.class, userId);

            return userPreference;

        } catch (AmazonServiceException ex) {
            MainActivity.clientManager.wipeCredentialsOnAuthError(ex);
        }

        return null;
    }

    /*
     * Updates one attribute/value pair for the specified user.
     */
    public static void updateUserPreference(UserPreference updateUserPreference) {

        AmazonDynamoDBClient ddb = MainActivity.clientManager.ddb();
        DynamoDBMapper mapper = new DynamoDBMapper(ddb);

        try {
            mapper.save(updateUserPreference);

        } catch (AmazonServiceException ex) {
            MainActivity.clientManager.wipeCredentialsOnAuthError(ex);
        }
    }

    /*
     * Deletes the specified user and all of its attribute/value pairs.
     */
    public static void deleteUser(UserPreference deleteUserPreference) {

        AmazonDynamoDBClient ddb = MainActivity.clientManager.ddb();
        DynamoDBMapper mapper = new DynamoDBMapper(ddb);

        try {
            mapper.delete(deleteUserPreference);

        } catch (AmazonServiceException ex) {
            MainActivity.clientManager.wipeCredentialsOnAuthError(ex);
        }
    }

    /*
     * Deletes the test table and all of its users and their attribute/value
     * pairs.
     */
    public static void cleanUp() {

        AmazonDynamoDBClient ddb = MainActivity.clientManager.ddb();

        DeleteTableRequest request = new DeleteTableRequest()
                .withTableName(CognitoSyncClientManager.TEST_TABLE_NAME);
        try {
            ddb.deleteTable(request);

        } catch (AmazonServiceException ex) {
            MainActivity.clientManager.wipeCredentialsOnAuthError(ex);
        }
    }

    @DynamoDBTable(tableName = CognitoSyncClientManager.TEST_TABLE_NAME)
    public static class UserPreference {
        private String uniqueId;
        private String userId;
        private String timeStamp;
        private String deviceId;
        private String batteryInfo;

        @DynamoDBHashKey(attributeName = "UniqueId")
        public String getUniqueId() {
            return uniqueId;
        }

        public void setUniqueId(String uniqueId) {
            this.uniqueId = uniqueId;
        }

        @DynamoDBAttribute(attributeName = "UserId")
        public String getUserId() {
            return userId;
        }

        public void setUserId(String userId) {
            this.userId = userId;
        }

        @DynamoDBAttribute(attributeName = "TimeStamp")
        public String getTimeStamp() {
            return timeStamp;
        }

        public void setTimestamp(String timeStamp) {
            this.timeStamp = timeStamp;
        }

        @DynamoDBAttribute(attributeName = "DeviceId")
        public String getDeviceId() {
            return deviceId;
        }

        public void setDeviceId(String deviceId) {
            this.deviceId = deviceId;
        }

        @DynamoDBAttribute(attributeName = "BatteryInfo")
        public String getBatteryInfo() {
            return batteryInfo;
        }

        public void setBatteryInfo(String batteryInfo) {
            this.batteryInfo = batteryInfo;
        }
    }
}