Java tutorial
/* * Copyright 2012-2015 Aerospike, Inc. * * Portions may be licensed to Aerospike, Inc. under one or more contributor * license agreements. * * Licensed under the Apache License, Version 2.0 (the "License"); you may not * use this file except in compliance with the License. You may obtain a copy of * the License at http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License 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.aerospike.example.cache; import java.io.PrintWriter; import java.io.StringWriter; import java.util.List; import org.apache.commons.cli.CommandLine; import org.apache.commons.cli.CommandLineParser; import org.apache.commons.cli.HelpFormatter; import org.apache.commons.cli.Options; import org.apache.commons.cli.PosixParser; import org.apache.log4j.Logger; import org.json.simple.JSONObject; import com.aerospike.client.AerospikeClient; import com.aerospike.client.AerospikeException; import com.aerospike.client.policy.Policy; import com.aerospike.client.policy.WritePolicy; /** @author Peter Milne */ public class AsACache { private AerospikeClient client; private String seedHost; private int port; private String namespace; private String set; private WritePolicy writePolicy; private Policy policy; private static Logger log = Logger.getLogger(AsACache.class); public AsACache(String host, int port, String namespace, String set) throws AerospikeException { this.client = new AerospikeClient(host, port); this.seedHost = host; this.port = port; this.namespace = namespace; this.set = set; this.writePolicy = new WritePolicy(); this.policy = new Policy(); } public static void main(String[] args) throws AerospikeException { try { Options options = new Options(); options.addOption("h", "host", true, "Server hostname (default: 127.0.0.1)"); options.addOption("p", "port", true, "Server port (default: 3000)"); options.addOption("n", "namespace", true, "Namespace (default: test)"); options.addOption("s", "set", true, "Set (default: demo)"); options.addOption("u", "usage", false, "Print usage."); CommandLineParser parser = new PosixParser(); CommandLine cl = parser.parse(options, args, false); String host = cl.getOptionValue("h", "127.0.0.1"); String portString = cl.getOptionValue("p", "3000"); int port = Integer.parseInt(portString); String namespace = cl.getOptionValue("n", "test"); String set = cl.getOptionValue("s", "demo"); log.debug("Host: " + host); log.debug("Port: " + port); log.debug("Namespace: " + namespace); log.debug("Set: " + set); @SuppressWarnings("unchecked") List<String> cmds = cl.getArgList(); if (cmds.size() == 0 && cl.hasOption("u")) { logUsage(options); return; } AsACache as = new AsACache(host, port, namespace, set); as.work(); } catch (Exception e) { log.error("Critical error", e); } } /** * Write usage to console. */ private static void logUsage(Options options) { HelpFormatter formatter = new HelpFormatter(); StringWriter sw = new StringWriter(); PrintWriter pw = new PrintWriter(sw); String syntax = AsACache.class.getName() + " [<options>]"; formatter.printHelp(pw, 100, syntax, "options:", options, 0, 2, null); log.info(sw.toString()); } public void work() throws Exception { Flights flights = new Flights<String, JSONObject>(this.client, this.namespace, this.set, 300); // Time to live of 5 mins log.info(flights.get("DFW")); log.info(flights.get("SFO")); log.info(flights.get("BWI")); log.info(flights.get("SJC")); } }