Java tutorial
package io.robrose.hop.watermap.aws; import com.amazonaws.geo.model.GetPointRequest; import com.amazonaws.geo.model.GetPointResult; import com.amazonaws.geo.model.QueryRadiusRequest; import com.amazonaws.geo.model.QueryRadiusResult; import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient; /** * Created by Robert C on 2/6/2016. */ /* * Copyright 2012-2016 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.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.UUID; import com.amazonaws.AmazonClientException; import com.amazonaws.AmazonServiceException; import com.amazonaws.auth.AWSCredentials; import com.amazonaws.auth.BasicAWSCredentials; //import com.amazonaws.auth.profile.ProfileCredentialsProvider; import com.amazonaws.geo.GeoDataManager; import com.amazonaws.geo.GeoDataManagerConfiguration; import com.amazonaws.geo.model.GeoPoint; import com.amazonaws.geo.model.PutPointRequest; import com.amazonaws.geo.model.PutPointResult; import com.amazonaws.geo.util.GeoTableUtil; import com.amazonaws.regions.Region; import com.amazonaws.regions.Regions; 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.CreateTableRequest; import com.amazonaws.services.dynamodbv2.model.CreateTableResult; import com.amazonaws.services.dynamodbv2.model.DescribeTableRequest; 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; import io.robrose.hop.watermap.aws.util.Constants; import io.robrose.hop.watermap.aws.util.WaterPin; /** * This sample demonstrates how to perform a few simple operations with the * Amazon DynamoDB service. */ public class DynamoGeoClient { private static GeoDataManagerConfiguration config; private static GeoDataManager geoDataManager; private static String accessKey = "AKIAIK3X7CV2F2OP7MYQ"; private static String secretKey = "YpwBdGgvn6cBR6RTHTCoZb3FlCAf7JRgF8arwV33"; private static boolean initialized = false; /* * Before running the code: * Fill in your AWS access credentials in the provided credentials * file template, and be sure to move the file to the default location * (C:\\Users\\Robert\\.aws\\credentials) where the sample code will load the * credentials from. * https://console.aws.amazon.com/iam/home?#security_credential * * WARNING: * To avoid accidental leakage of your credentials, DO NOT keep * the credentials file in your source directory. */ static AmazonDynamoDBClient dynamoDB; /** * The only information needed to create a client are security credentials * consisting of the AWS Access Key ID and Secret Access Key. All other * configuration, such as the service endpoints, are performed * automatically. Client parameters, such as proxies, can be specified in an * optional ClientConfiguration object when constructing a client. * * @see com.amazonaws.auth.BasicAWSCredentials // * @see com.amazonaws.auth.ProfilesConfigFile * @see com.amazonaws.ClientConfiguration */ public static void init() { if (initialized) return; /* * The ProfileCredentialsProvider will return your [default] * credential profile by reading from the credentials file located at * (C:\\Users\\Robert\\.aws\\credentials). */ AWSCredentials credentials; try { credentials = new BasicAWSCredentials(accessKey, secretKey); } catch (Exception e) { throw new AmazonClientException("Cannot load the credentials from the credential profiles file. " + "Please make sure that your credentials file is at the correct " + "location (C:\\Users\\Robert\\.aws\\credentials), and is in valid format.", e); } dynamoDB = new AmazonDynamoDBClient(credentials); Region usEast1 = Region.getRegion(Regions.US_EAST_1); dynamoDB.setRegion(usEast1); initialized = true; } public static void main(String[] args) { init(); try { String tableName = "water-safe-locations-table"; config = new GeoDataManagerConfiguration(dynamoDB, tableName); geoDataManager = new GeoDataManager(config); // Create table if it does not exist yet if (Tables.doesTableExist(dynamoDB, tableName)) { System.out.println("Table " + tableName + " is already ACTIVE"); } else { // Create a table with a primary hash key named 'name', which holds a string /* CreateTableRequest createTableRequest = new CreateTableRequest().withTableName(tableName) .withKeySchema(new KeySchemaElement().withAttributeName("name").withKeyType(KeyType.HASH)) .withAttributeDefinitions(new AttributeDefinition().withAttributeName("name").withAttributeType(ScalarAttributeType.S)) .withProvisionedThroughput(new ProvisionedThroughput().withReadCapacityUnits(1L).withWriteCapacityUnits(1L)); TableDescription createdTableDescription = dynamoDB.createTable(createTableRequest).getTableDescription(); */ //AWSCredentials credentials = new BasicAWSCredentials(accessKey, secretKey); CreateTableRequest createTableRequest = GeoTableUtil.getCreateTableRequest(config); CreateTableResult createTableResult = dynamoDB.createTable(createTableRequest); System.out.println("Created Table: " + tableName); // Wait for it to become active System.out.println("Waiting for " + tableName + " to become ACTIVE..."); Tables.waitForTableToBecomeActive(dynamoDB, tableName); } // Describe our new table DescribeTableRequest describeTableRequest = new DescribeTableRequest().withTableName(tableName); TableDescription tableDescription = dynamoDB.describeTable(describeTableRequest).getTable(); System.out.println("Table Description: " + tableDescription); Map<String, String> m = new HashMap<>(); m.put("lat", "51.5034070"); m.put("lng", "-0.1275920"); m.put("violationCode", "47"); // request = new JSONObject(m); //try { // putPoint(request); //}catch(JSONException f){ // System.out.println("Bad JSON"); //} // Scan items for movies with a year attribute greater than 1985 HashMap<String, Condition> scanFilter = new HashMap<>(); Condition condition = new Condition().withComparisonOperator(ComparisonOperator.GT.toString()) .withAttributeValueList(new AttributeValue().withN("1985")); scanFilter.put("year", condition); ScanRequest scanRequest = new ScanRequest(tableName);//.withScanFilter(scanFilter); ScanResult scanResult = dynamoDB.scan(scanRequest); System.out.println("Result: " + scanResult); } catch (AmazonServiceException ase) { System.out.println("Caught an AmazonServiceException, which means your request made it " + "to AWS, but was rejected with an error response for some reason."); System.out.println("Error Message: " + ase.getMessage()); System.out.println("HTTP Status Code: " + ase.getStatusCode()); System.out.println("AWS Error Code: " + ase.getErrorCode()); System.out.println("Error Type: " + ase.getErrorType()); System.out.println("Request ID: " + ase.getRequestId()); } catch (AmazonClientException ace) { System.out.println("Caught an AmazonClientException, which means the client encountered " + "a serious internal problem while trying to communicate with AWS, " + "such as not being able to access the network."); System.out.println("Error Message: " + ace.getMessage()); } } private static void putPoint(String violCatCode, String contamCode, String violCode, double lat, double lng) { GeoPoint geoPoint = new GeoPoint(lat, lng); AttributeValue rangeKeyAttributeValue = new AttributeValue().withS(UUID.randomUUID().toString()); AttributeValue violationCategoryCodeAttributeValue = new AttributeValue().withS(violCatCode); AttributeValue contaminantCodeAttributeValue = new AttributeValue().withS(contamCode); AttributeValue violationCodeAttributeValue = new AttributeValue().withS(violCode); PutPointRequest putPointRequest = new PutPointRequest(geoPoint, rangeKeyAttributeValue); putPointRequest.getPutItemRequest().addItemEntry(Constants.FIELD_VIOL_CAT, violationCategoryCodeAttributeValue); putPointRequest.getPutItemRequest().addItemEntry(Constants.FIELD_CONT_CODE, contaminantCodeAttributeValue); putPointRequest.getPutItemRequest().addItemEntry(Constants.FIELD_VIOL_CODE, violationCodeAttributeValue); PutPointResult putPointResult = geoDataManager.putPoint(putPointRequest); //printPutPointResult(putPointResult, out); } public static WaterPin getPoint(GeoPoint point, String UUID) { AttributeValue attr = new AttributeValue().withS(UUID); GetPointResult result = geoDataManager.getPoint(new GetPointRequest(point, attr)); return new WaterPin(result.getGetItemResult().getItem()); } public static List<WaterPin> getRadialPoints(GeoPoint point, double radius) { QueryRadiusResult result = geoDataManager.queryRadius(new QueryRadiusRequest(point, radius)); List<WaterPin> list = new ArrayList<>(); List<Map<String, AttributeValue>> rawList = result.getItem(); for (Map<String, AttributeValue> m : rawList) { list.add(new WaterPin(m)); } return list; } //TODO: Make this for water sites! public static Map<String, AttributeValue> newItem(String name, int year, String rating, String... fans) { Map<String, AttributeValue> item = new HashMap<>(); item.put("name", new AttributeValue(name)); item.put("year", new AttributeValue().withN(Integer.toString(year))); item.put("rating", new AttributeValue(rating)); item.put("fans", new AttributeValue().withSS(fans)); return item; } }