Java tutorial
/* * Copyright 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. */ package com.alertlogic.aws.kinesis.test1; import org.eclipse.jetty.server.Server; import org.eclipse.jetty.server.handler.DefaultHandler; import org.eclipse.jetty.server.handler.HandlerList; import org.eclipse.jetty.server.handler.ResourceHandler; import org.eclipse.jetty.servlet.ServletContextHandler; import org.eclipse.jetty.servlet.ServletHolder; import com.amazonaws.ClientConfiguration; import com.amazonaws.auth.AWSCredentialsProvider; import com.amazonaws.auth.DefaultAWSCredentialsProviderChain; import com.amazonaws.regions.Region; import com.amazonaws.regions.RegionUtils; import com.amazonaws.services.dynamodbv2.AmazonDynamoDB; import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient; import com.alertlogic.aws.kinesis.test1.utils.DynamoDBUtils; import com.alertlogic.aws.kinesis.test1.utils.SampleUtils; import com.alertlogic.aws.kinesis.test1.webserver.GetCountsServlet; /** * Create an embedded HTTP server that responds with counts on the provided port. */ public class WebServer { /** * Start an embedded web server. * * @param args Expecting 4 arguments: Port number, File path to static content, the name of the * DynamoDB table where counts are persisted to, and the AWS region in which these resources * exist or should be created. * @throws Exception Error starting the web server. */ public static void main(String[] args) throws Exception { if (args.length != 4) { System.err.println("Usage: " + WebServer.class + " <port number> <directory for static content> <DynamoDB table name> <region>"); System.exit(1); } Server server = new Server(Integer.parseInt(args[0])); String wwwroot = args[1]; String countsTableName = args[2]; Region region = SampleUtils.parseRegion(args[3]); // Servlet context ServletContextHandler context = new ServletContextHandler( ServletContextHandler.NO_SESSIONS | ServletContextHandler.NO_SECURITY); context.setContextPath("/api"); // Static resource context ResourceHandler resources = new ResourceHandler(); resources.setDirectoriesListed(false); resources.setWelcomeFiles(new String[] { "graph.html" }); resources.setResourceBase(wwwroot); // Create the servlet to handle /GetCounts AWSCredentialsProvider credentialsProvider = new DefaultAWSCredentialsProviderChain(); ClientConfiguration clientConfig = SampleUtils.configureUserAgentForSample(new ClientConfiguration()); AmazonDynamoDB dynamoDB = new AmazonDynamoDBClient(credentialsProvider, clientConfig); dynamoDB.setRegion(region); DynamoDBUtils dynamoDBUtils = new DynamoDBUtils(dynamoDB); context.addServlet( new ServletHolder(new GetCountsServlet(dynamoDBUtils.createMapperForTable(countsTableName))), "/GetCounts/*"); HandlerList handlers = new HandlerList(); handlers.addHandler(context); handlers.addHandler(resources); handlers.addHandler(new DefaultHandler()); server.setHandler(handlers); server.start(); server.join(); } }