com.app.dynamoDb.DynamoFacebookUsers.java Source code

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Here is the source code for com.app.dynamoDb.DynamoFacebookUsers.java

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package com.app.dynamoDb;

/*
 * Copyright 2012-2015 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.
 */
import java.util.HashMap;
import java.util.Map;

import com.amazonaws.AmazonClientException;
import com.amazonaws.AmazonServiceException;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.AWSCredentialsProviderChain;
import com.amazonaws.auth.ClasspathPropertiesFileCredentialsProvider;
import com.amazonaws.auth.InstanceProfileCredentialsProvider;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.regions.Region;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient;
import com.amazonaws.services.dynamodbv2.model.AttributeDefinition;
import com.amazonaws.services.dynamodbv2.model.AttributeValue;
import com.amazonaws.services.dynamodbv2.model.ComparisonOperator;
import com.amazonaws.services.dynamodbv2.model.Condition;
import com.amazonaws.services.dynamodbv2.model.ConditionalOperator;
import com.amazonaws.services.dynamodbv2.model.CreateTableRequest;
import com.amazonaws.services.dynamodbv2.model.DescribeTableRequest;
import com.amazonaws.services.dynamodbv2.model.KeySchemaElement;
import com.amazonaws.services.dynamodbv2.model.KeyType;
import com.amazonaws.services.dynamodbv2.model.ProvisionedThroughput;
import com.amazonaws.services.dynamodbv2.model.PutItemRequest;
import com.amazonaws.services.dynamodbv2.model.PutItemResult;
import com.amazonaws.services.dynamodbv2.model.ScalarAttributeType;
import com.amazonaws.services.dynamodbv2.model.ScanRequest;
import com.amazonaws.services.dynamodbv2.model.ScanResult;
import com.amazonaws.services.dynamodbv2.model.TableDescription;
import com.amazonaws.services.dynamodbv2.util.Tables;

public class DynamoFacebookUsers {

    public String UserID;
    public String UserName;
    public String Email;

    public AmazonDynamoDBClient dynamoDB;
    public AWSCredentials credentials;

    public DynamoFacebookUsers() {

        //   credentials = new ProfileCredentialsProvider("default").getCredentials();
        dynamoDB = new AmazonDynamoDBClient(new AWSCredentialsProviderChain(
                new InstanceProfileCredentialsProvider(), new ClasspathPropertiesFileCredentialsProvider()));
        Region usWest2 = Region.getRegion(Regions.US_WEST_2);
        dynamoDB.setRegion(usWest2);
    }

    public String getUserID() {
        return UserID;
    }

    public void setUserID(String userID) {
        UserID = userID;
    }

    public String getUserName() {
        return UserName;
    }

    public void setUserName(String userName) {
        UserName = userName;
    }

    public String getEmail() {
        return Email;
    }

    public void setEmail(String email) {
        Email = email;
    }

    public void insert(String UserID, String UserName, String Email) {
        Map<String, AttributeValue> item = new HashMap<String, AttributeValue>();
        item.put("UserID", new AttributeValue(UserID));
        item.put("UserName", new AttributeValue(UserName));
        item.put("Email", new AttributeValue(Email));
        System.out.println("inserted");

        PutItemRequest putItemRequest = new PutItemRequest("FacebookUsers", item);
        PutItemResult putItemResult = dynamoDB.putItem(putItemRequest);

    }

    public boolean isExist(String UserID) {
        ScanRequest scanRequest = new ScanRequest("FacebookUsers");

        Map<String, Condition> scanFilter = new HashMap<String, Condition>();
        scanFilter.put("UserID", new Condition().withAttributeValueList(new AttributeValue(UserID))
                .withComparisonOperator(ComparisonOperator.EQ));

        scanRequest.setScanFilter(scanFilter);
        ScanResult scanResult = dynamoDB.scan(scanRequest);

        for (Map<String, AttributeValue> item : scanResult.getItems()) {
            if (!(item.isEmpty()))
                return true;
        }
        return false;
    }

    public String getUserName(String UserID) {
        String result = "";
        ScanRequest scanRequest = new ScanRequest("FacebookUsers");

        Map<String, Condition> scanFilter = new HashMap<String, Condition>();
        scanFilter.put("UserID", new Condition().withAttributeValueList(new AttributeValue(UserID))
                .withComparisonOperator(ComparisonOperator.EQ));

        scanRequest.setScanFilter(scanFilter);
        ScanResult scanResult = dynamoDB.scan(scanRequest);

        for (Map<String, AttributeValue> item : scanResult.getItems()) {
            System.out.println(item.get("UserName"));

            result = item.get("UserName").toString();
        }
        return result;
    }

    public AttributeValue getUserID(String UserName) {

        ScanRequest scanRequest = new ScanRequest("FacebookUsers");

        Map<String, Condition> scanFilter = new HashMap<String, Condition>();
        scanFilter.put("Email", new Condition().withAttributeValueList(new AttributeValue(UserName))
                .withComparisonOperator(ComparisonOperator.EQ));
        scanRequest.setScanFilter(scanFilter);
        ScanResult scanResult = dynamoDB.scan(scanRequest);

        for (Map<String, AttributeValue> item : scanResult.getItems()) {
            return item.get("UserID");

        }
        return null;
    }

}