Java tutorial
package com.stockcloud; /* * Copyright 2012-2014 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.io.BufferedReader; import java.io.InputStreamReader; import java.net.URL; import java.net.URLConnection; import java.util.HashMap; import java.util.Map; import java.util.StringTokenizer; import com.amazonaws.AmazonClientException; import com.amazonaws.AmazonServiceException; import com.amazonaws.auth.ClasspathPropertiesFileCredentialsProvider; 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.CreateTableRequest; 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.TableDescription; import com.amazonaws.services.dynamodbv2.util.Tables; /** * This sample demonstrates how to perform a few simple operations with the * Amazon DynamoDB service. */ public class updatestock { /* * Important: Be sure to fill in your AWS access credentials in the * AwsCredentials.properties file before you try to run this sample. * http://aws.amazon.com/security-credentials */ 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.PropertiesCredentials * @see com.amazonaws.ClientConfiguration */ private static void init() throws Exception { /* * This credentials provider implementation loads your AWS credentials * from a properties file at the root of your classpath. */ dynamoDB = new AmazonDynamoDBClient(new ClasspathPropertiesFileCredentialsProvider()); Region usWest2 = Region.getRegion(Regions.US_WEST_2); dynamoDB.setRegion(usWest2); } public void update(String stockName) throws Exception { init(); String csvString; URL url = null; URLConnection urlConn = null; InputStreamReader inStream = null; BufferedReader buff = null; // static AmazonDynamoDBClient dynamoDB; // String jb=symbol.substring(0, 3)+"+"+symbol.substring(3, 7); // System.out.println(jb); // String[] newsymbol=symbol.split(","); int i = 0; String symbol = stockName; // String symbol[] = { "ABT", "ABBV", "ACE", "ACN", "ACT", "ADBE", // "ADT", // "AET", "AFL", "ARG", "AA", "ALL", "ALTR", "AMZN", "AAPL", // "BLL", "BAC", "BMS", "BBY", "BLK", "BSX", "CA", "COF", "CCL", // "CAT", "CERN", "CVX", "CSCO", "COH", "KO", "COST", "DVN", // "DTV", "DG", "DOV", "DOW", "DUK", "EBAY", "EOG", "EMR", "EFX", // "EQR", "EXPE", "ESRX", "FB", "FE", "FLIR", "FMC", "F", "FOSL", // "GME", "GPS", "GD", "GE", "GIS", "GS", "GOOG", "HOG", "HRS", // "HCP", "HAS", "HES", "HD", "HST", "HUM", "ITW", "INTC", "ICE", // "IBM", "INTU", "IVZ", "JOY", "JNPR", "KEY", "KMI", "KLAC", // "KSS", "KR", "LB", "LRCX", "LM", "LEN", "LNC", "LOW", "MAC", // "MMM", "M", "MAR", "MA", "MCD", "MRK", "MET", "MU", "MSFT", // "MNST", "MS", "MOS", "MUR", "MYL" }; // String // Num[]={"1","2","3","4","5","6","7","8","9","10","11","12","13","14", // "15","16","17","18","19","20","21","22","23","24","25","26","27","28", // "29","30","3","2","3","4","5","6","7","8","9","10","1","2","3","4","5", // "6","7","8","9","10","1","2","3","4","5","6","7","8","9","10","1","2", // "3","4","5","6","7","8","9","10","1","2","3","4","5","6","7","8","9", // "10","1","2","3","4","5","6","7","8","9","10",} // loop to get the current data of every stocks(100) url = new URL("http://quote.yahoo.com/d/quotes.csv?s=" + symbol + "&f=osl1d1t1c1ohgv&e=.csv"); urlConn = url.openConnection(); inStream = new InputStreamReader(urlConn.getInputStream()); buff = new BufferedReader(inStream); // get the quote as a csv string csvString = buff.readLine(); // while(csvString!=null) // { // parse the csv string StringTokenizer tokenizer = new StringTokenizer(csvString, ","); String open = tokenizer.nextToken(); String ticker = tokenizer.nextToken(); String price = tokenizer.nextToken(); String tradeDate = tokenizer.nextToken(); String tradeTime = tokenizer.nextToken(); System.out .println("Symbol: " + ticker + " Price: " + price + " Date: " + tradeDate + " Time: " + tradeTime); // table try { String tableName = symbol + "current"; // 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("Time").withKeyType(KeyType.HASH)) .withAttributeDefinitions(new AttributeDefinition().withAttributeName("Time") .withAttributeType(ScalarAttributeType.S)) .withProvisionedThroughput( new ProvisionedThroughput().withReadCapacityUnits(1L).withWriteCapacityUnits(1L)); TableDescription createdTableDescription = dynamoDB.createTable(createTableRequest) .getTableDescription(); System.out.println("Created Table: " + createdTableDescription); // Wait for it to become active System.out.println("Waiting for " + tableName + " to become ACTIVE..."); Tables.waitForTableToBecomeActive(dynamoDB, tableName); } Map<String, AttributeValue> item = newItem(ticker, price, tradeDate, tradeTime, open); PutItemRequest putItemRequest = new PutItemRequest(tableName, item); PutItemResult putItemResult = dynamoDB.putItem(putItemRequest); System.out.println("Result: " + putItemResult); } 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()); } // try over inStream.close(); buff.close(); }// private static Map<String, AttributeValue> newItem(String ticker, String price, String tradeDate, String tradeTime, String open) { Map<String, AttributeValue> item = new HashMap<String, AttributeValue>(); item.put("ticker", new AttributeValue(ticker)); item.put("price", new AttributeValue(price)); item.put("tradeDate", new AttributeValue(tradeDate)); item.put("Time", new AttributeValue(tradeTime)); item.put("open", new AttributeValue(open)); // item.put("No", new AttributeValue(Num)); return item; }// Map function over }// class over