├── .gitignore ├── LICENSE.txt ├── README.md ├── docker ├── Dockerfile └── launch.sh ├── pom.xml └── src └── main ├── java └── org │ └── infinispan │ └── tutorial │ └── embedded │ ├── CacheListener.java │ ├── CachingWeatherService.java │ ├── ClusterListener.java │ ├── LocationWeather.java │ ├── OpenWeatherMapService.java │ ├── RandomWeatherService.java │ ├── SerializationContextInitializer.java │ ├── WeatherApp.java │ └── WeatherService.java └── resources ├── logging.properties └── weatherapp-infinispan.xml /.gitignore: -------------------------------------------------------------------------------- 1 | *.class 2 | 3 | # Package Files # 4 | *.jar 5 | *.war 6 | *.ear 7 | 8 | target 9 | 10 | .settings 11 | .project 12 | .classpath 13 | 14 | *.iml 15 | *.ipr 16 | *.iws 17 | .idea 18 | 19 | # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml 20 | hs_err_pid* 21 | -------------------------------------------------------------------------------- /LICENSE.txt: -------------------------------------------------------------------------------- 1 | 2 | Apache License 3 | Version 2.0, January 2004 4 | http://www.apache.org/licenses/ 5 | 6 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 7 | 8 | 1. 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We also recommend that a 186 | file or class name and description of purpose be included on the 187 | same "printed page" as the copyright notice for easier 188 | identification within third-party archives. 189 | 190 | Copyright [yyyy] [name of copyright owner] 191 | 192 | Licensed under the Apache License, Version 2.0 (the "License"); 193 | you may not use this file except in compliance with the License. 194 | You may obtain a copy of the License at 195 | 196 | http://www.apache.org/licenses/LICENSE-2.0 197 | 198 | Unless required by applicable law or agreed to in writing, software 199 | distributed under the License is distributed on an "AS IS" BASIS, 200 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 201 | See the License for the specific language governing permissions and 202 | limitations under the License. 203 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Infinispan Embedded Tutorial: Weather App 2 | 3 | ## Overview 4 | 5 | This is a tutorial which explains how to use Infinispan embedded in your own 6 | application. The application will retrieve the current weather conditions for 7 | some cities and store them in a cache, for quicker retrieval. It will also 8 | show how to configure the cache for expiration, so that entries get removed as 9 | they age. It will then demonstrate how to cluster multiple nodes together and 10 | reacting to events in the cluster. Finally, a computation of average temperatures 11 | per country will show the power of the map/reduce functionality. 12 | 13 | Each tagged commit is a separate lesson teaching a single aspect of Infinispan. 14 | 15 | The tutorial instructions are at http://infinispan.org/tutorials/embedded/ 16 | 17 | N.B. The tutorial connects to OpenWeatherMap (http://openweathermap.org) to 18 | retrieve current weather data. The service requires obtaining a free API key. 19 | Before launching the application, ensure you've set the OWMAPIKEY environment 20 | variable to your API key. 21 | If you don't want to register for the service, if you don't have an Internet 22 | connection or you are having trouble connecting to the service, just don't set 23 | the environment variable, and it will use the RandomWeatherService. 24 | 25 | ## Prerequisites 26 | 27 | ### Git 28 | 29 | - A good place to learn about setting up git is [here][git-github] 30 | - Git [home][git-home] (download, documentation) 31 | 32 | ### JDK 33 | 34 | - Get a [JDK][jdk-download]. You will need version 1.8 or higher 35 | 36 | ### Maven 37 | 38 | - Get [Maven][maven-download]. You will need version 3.2 or higher 39 | 40 | ## Commits / Tutorial Outline 41 | 42 | You can check out any point of the tutorial using 43 | git checkout step-? 44 | 45 | To see the changes between any two lessons use the git diff command. 46 | git diff step-?..step-? 47 | 48 | ### step-0/setup 49 | 50 | - The initial implementation of the Weather application 51 | 52 | ### step-1/cache-manager 53 | 54 | - Adding Infinispan to the project and initializing a cache manager 55 | 56 | ### step-2/cache-put-get 57 | 58 | - Add caching to the weather service 59 | 60 | ### step-3/expiration 61 | 62 | - Store the entries in the cache with an expiration time 63 | 64 | ### step-4/cachemanager-configuration 65 | 66 | - Configure the features of the default cache 67 | 68 | ### step-5/clustering 69 | 70 | - Add a transport to the CacheManager so that it supports clustering 71 | 72 | ### step-6/cachemanager-listener 73 | 74 | - Use CacheManager events to detect changes in the cluster 75 | 76 | ### step-7/cache-listener 77 | 78 | - Detect changes to the cache with a clustered listener 79 | 80 | ### step-8/grouping 81 | 82 | - Group related entries on the same nodes for efficiency 83 | 84 | ### step-9/externalizer 85 | 86 | - Implement a custom externalizer for our value class 87 | 88 | ### step-10/streams 89 | 90 | - Use Distributed Streams to compute temperature averages per country 91 | 92 | ### step-11/declarative-configuration 93 | 94 | - Use the XML configuration instead of the programmatic API 95 | 96 | ## Building and running the tutorial 97 | 98 | - Run `mvn clean package` to rebuild the application 99 | - Run `mvn exec:exec` to execute the application. In case you're running a clustered step, run this from 100 | multiple terminals, where each instance will represent a node 101 | - Run `mvn clean package docker:build` to build docker image, and then run `docker run infinispan-embedded-tutorial/infinispan-embedded-tutorial` in 2 different terminals to simulate multiple nodes of distributed cache 102 | 103 | ## Application Directory Layout 104 | 105 | docker/ --> 106 | src/ --> 107 | main/ --> 108 | java/ --> 109 | resources/ --> 110 | 111 | ## Contact 112 | 113 | For more information on Infinispan please check out http://infinispan.org/ 114 | 115 | [jdk-download]: http://www.oracle.com/technetwork/articles/javase/index-jsp-138363.html 116 | [git-home]: http://git-scm.com 117 | [git-github]: http://help.github.com/set-up-git-redirect 118 | [maven-download]: http://maven.apache.org/download.html 119 | 120 | -------------------------------------------------------------------------------- /docker/Dockerfile: -------------------------------------------------------------------------------- 1 | FROM jboss/base-jdk:8 2 | 3 | USER root 4 | RUN yum install -y iproute 5 | ADD launch.sh /usr/bin/launch.sh 6 | RUN chmod +x /usr/bin/launch.sh 7 | RUN mkdir -p /opt/infinispan-embedded-tutorial/ 8 | RUN chown jboss:jboss /opt/infinispan-embedded-tutorial/ 9 | 10 | USER jboss 11 | ADD infinispan-embedded-tutorial-1.0.0-SNAPSHOT-jar-with-dependencies.jar /opt/infinispan-embedded-tutorial/infinispan-embedded-tutorial.jar 12 | 13 | ENTRYPOINT /usr/bin/launch.sh 14 | 15 | -------------------------------------------------------------------------------- /docker/launch.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | 3 | IPADDR=$(ip a s | sed -ne '/127.0.0.1/!{s/^[ \t]*inet[ \t]*\([0-9.]\+\)\/.*$/\1/p}') 4 | echo $IPADDR 5 | 6 | /usr/bin/java -Djava.net.preferIPv4Stack=true -Djgroups.bind_addr=$IPADDR -jar /opt/infinispan-embedded-tutorial/infinispan-embedded-tutorial.jar 7 | 8 | -------------------------------------------------------------------------------- /pom.xml: -------------------------------------------------------------------------------- 1 | 2 | 4.0.0 3 | org.infinispan.tutorial 4 | infinispan-embedded-tutorial 5 | 1.0.0-SNAPSHOT 6 | Infinispan Tutorial: Embedded tutorial 7 | 8 | 9 | 11.0.0.Final 10 | 1.3.1 11 | 4.3.3.Final 12 | 13 | 14 | 15 | 16 | 17 | org.infinispan 18 | infinispan-bom 19 | ${version.infinispan} 20 | pom 21 | import 22 | 23 | 24 | 25 | 26 | 27 | 28 | org.infinispan 29 | infinispan-core 30 | 31 | 32 | org.infinispan.protostream 33 | protostream-processor 34 | ${version.protostream} 35 | 36 | 37 | javax.annotation 38 | javax.annotation-api 39 | ${version.javax.annotation.javax.annotation-api} 40 | 41 | 42 | 43 | 44 | 45 | 46 | org.apache.maven.plugins 47 | maven-compiler-plugin 48 | 3.8.1 49 | 50 | 1.8 51 | 1.8 52 | 53 | 54 | 55 | org.apache.maven.plugins 56 | maven-assembly-plugin 57 | 58 | 59 | package 60 | 61 | single 62 | 63 | 64 | 65 | 66 | 67 | jar-with-dependencies 68 | 69 | 70 | 71 | org.infinispan.tutorial.embedded.WeatherApp 72 | 73 | 74 | 75 | 76 | 77 | org.codehaus.mojo 78 | exec-maven-plugin 79 | 1.6.0 80 | 81 | 82 | 83 | exec 84 | 85 | 86 | 87 | 88 | java 89 | 90 | -Djava.net.preferIPv4Stack=true 91 | -Djava.util.logging.config.file=src/main/resources/logging.properties 92 | -classpath 93 | 94 | org.infinispan.tutorial.embedded.WeatherApp 95 | 96 | 97 | 98 | 99 | com.spotify 100 | docker-maven-plugin 101 | 1.2.0 102 | 103 | false 104 | infinispan-embedded-tutorial/${project.artifactId} 105 | 106 | ${project.version} 107 | 108 | ${project.basedir}/docker 109 | 110 | 111 | / 112 | ${project.build.directory} 113 | ${project.build.finalName}-jar-with-dependencies.jar 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | -------------------------------------------------------------------------------- /src/main/java/org/infinispan/tutorial/embedded/CacheListener.java: -------------------------------------------------------------------------------- 1 | package org.infinispan.tutorial.embedded; 2 | 3 | import org.infinispan.notifications.Listener; 4 | import org.infinispan.notifications.cachelistener.annotation.CacheEntryCreated; 5 | import org.infinispan.notifications.cachelistener.event.CacheEntryCreatedEvent; 6 | 7 | @Listener(clustered = true) 8 | public class CacheListener { 9 | 10 | @CacheEntryCreated 11 | public void entryCreated(CacheEntryCreatedEvent event) { 12 | if (!event.isOriginLocal()) { 13 | System.out.printf("-- Entry for %s modified by another node in the cluster\n", event.getKey()); 14 | } 15 | } 16 | } 17 | -------------------------------------------------------------------------------- /src/main/java/org/infinispan/tutorial/embedded/CachingWeatherService.java: -------------------------------------------------------------------------------- 1 | package org.infinispan.tutorial.embedded; 2 | 3 | import org.infinispan.Cache; 4 | 5 | public abstract class CachingWeatherService implements WeatherService { 6 | final private Cache cache; 7 | 8 | public CachingWeatherService(Cache cache) { 9 | this.cache = cache; 10 | } 11 | 12 | @Override 13 | final public LocationWeather getWeatherForLocation(String location) { 14 | LocationWeather weather = cache.get(location); 15 | if (weather == null) { 16 | weather = fetchWeather(location); 17 | cache.put(location, weather); 18 | } 19 | return weather; 20 | } 21 | 22 | protected abstract LocationWeather fetchWeather(String location); 23 | } 24 | -------------------------------------------------------------------------------- /src/main/java/org/infinispan/tutorial/embedded/ClusterListener.java: -------------------------------------------------------------------------------- 1 | package org.infinispan.tutorial.embedded; 2 | 3 | import java.util.concurrent.CountDownLatch; 4 | 5 | import org.infinispan.notifications.Listener; 6 | import org.infinispan.notifications.cachemanagerlistener.annotation.ViewChanged; 7 | import org.infinispan.notifications.cachemanagerlistener.event.ViewChangedEvent; 8 | 9 | @Listener 10 | public class ClusterListener { 11 | CountDownLatch clusterFormedLatch = new CountDownLatch(1); 12 | CountDownLatch shutdownLatch = new CountDownLatch(1); 13 | private final int expectedNodes; 14 | 15 | public ClusterListener(int expectedNodes) { 16 | this.expectedNodes = expectedNodes; 17 | } 18 | 19 | @ViewChanged 20 | public void viewChanged(ViewChangedEvent event) { 21 | System.out.printf("---- View changed: %s ----\n", event.getNewMembers()); 22 | 23 | if (event.getCacheManager().getMembers().size() == expectedNodes) { 24 | clusterFormedLatch.countDown(); 25 | } else if (event.getNewMembers().size() < event.getOldMembers().size()) { 26 | shutdownLatch.countDown(); 27 | } 28 | } 29 | } 30 | -------------------------------------------------------------------------------- /src/main/java/org/infinispan/tutorial/embedded/LocationWeather.java: -------------------------------------------------------------------------------- 1 | package org.infinispan.tutorial.embedded; 2 | 3 | import org.infinispan.distribution.group.Grouper; 4 | import org.infinispan.protostream.annotations.ProtoFactory; 5 | import org.infinispan.protostream.annotations.ProtoField; 6 | 7 | public class LocationWeather { 8 | 9 | @ProtoField(number = 1, defaultValue = "0.0") 10 | final float temperature; 11 | 12 | @ProtoField(number = 2) 13 | final String conditions; 14 | 15 | @ProtoField(number = 3) 16 | final String country; 17 | 18 | @ProtoFactory 19 | public LocationWeather(float temperature, String conditions, String country) { 20 | this.temperature = temperature; 21 | this.conditions = conditions; 22 | this.country = country; 23 | } 24 | 25 | @Override 26 | public String toString() { 27 | return String.format("Temperature: %.1f° C, Conditions: %s", temperature, conditions); 28 | } 29 | 30 | public static class LocationGrouper implements Grouper { 31 | 32 | @Override 33 | public String computeGroup(String key, String group) { 34 | return key.split(",")[1].trim(); 35 | } 36 | 37 | @Override 38 | public Class getKeyType() { 39 | return String.class; 40 | } 41 | } 42 | 43 | } 44 | 45 | -------------------------------------------------------------------------------- /src/main/java/org/infinispan/tutorial/embedded/OpenWeatherMapService.java: -------------------------------------------------------------------------------- 1 | package org.infinispan.tutorial.embedded; 2 | 3 | import java.net.HttpURLConnection; 4 | import java.net.URL; 5 | import java.net.URLEncoder; 6 | 7 | import javax.xml.parsers.DocumentBuilder; 8 | import javax.xml.parsers.DocumentBuilderFactory; 9 | import javax.xml.parsers.ParserConfigurationException; 10 | 11 | import org.infinispan.Cache; 12 | import org.w3c.dom.Document; 13 | import org.w3c.dom.Element; 14 | 15 | public class OpenWeatherMapService extends CachingWeatherService { 16 | final private static String OWM_BASE_URL = "http://api.openweathermap.org/data/2.5/weather"; 17 | private DocumentBuilder db; 18 | private final String apiKey; 19 | 20 | public OpenWeatherMapService(String apiKey, Cache cache) { 21 | super(cache); 22 | this.apiKey = apiKey; 23 | DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); 24 | try { 25 | db = dbf.newDocumentBuilder(); 26 | } catch (ParserConfigurationException e) { 27 | } 28 | } 29 | 30 | private Document fetchData(String location) { 31 | HttpURLConnection conn = null; 32 | try { 33 | String query = String.format("%s?q=%s&mode=xml&units=metric&APPID=%s", OWM_BASE_URL, 34 | URLEncoder.encode(location.replaceAll(" ", ""), "UTF-8"), apiKey); 35 | URL url = new URL(query); 36 | conn = (HttpURLConnection) url.openConnection(); 37 | conn.setRequestMethod("GET"); 38 | conn.setRequestProperty("Accept", "application/xml"); 39 | if (conn.getResponseCode() != 200) { 40 | throw new Exception(); 41 | } 42 | return db.parse(conn.getInputStream()); 43 | } catch (Exception e) { 44 | return null; 45 | } finally { 46 | if (conn != null) { 47 | conn.disconnect(); 48 | } 49 | } 50 | } 51 | 52 | @Override 53 | protected LocationWeather fetchWeather(String location) { 54 | 55 | Document dom = fetchData(location); 56 | if (dom == null) { 57 | throw new RuntimeException("Unable to reach or get response from open weather service with given OWMAPIKEY : please try with valid OWMAPIKEY or use Random Weather Service"); 58 | } 59 | Element current = (Element) dom.getElementsByTagName("current").item(0); 60 | Element temperature = (Element) current.getElementsByTagName("temperature").item(0); 61 | Element weather = (Element) current.getElementsByTagName("weather").item(0); 62 | String[] split = location.split(","); 63 | return new LocationWeather( 64 | Float.parseFloat(temperature.getAttribute("value")), 65 | weather.getAttribute("value"), 66 | split[1].trim()); 67 | } 68 | 69 | } 70 | -------------------------------------------------------------------------------- /src/main/java/org/infinispan/tutorial/embedded/RandomWeatherService.java: -------------------------------------------------------------------------------- 1 | package org.infinispan.tutorial.embedded; 2 | 3 | import java.util.Random; 4 | import java.util.concurrent.TimeUnit; 5 | 6 | import org.infinispan.Cache; 7 | 8 | public class RandomWeatherService extends CachingWeatherService { 9 | final Random random; 10 | 11 | public RandomWeatherService(Cache cache) { 12 | super(cache); 13 | random = new Random(); 14 | } 15 | 16 | @Override 17 | protected LocationWeather fetchWeather(String location) { 18 | try { 19 | TimeUnit.MILLISECONDS.sleep(200); 20 | } catch (InterruptedException e) {} 21 | String[] split = location.split(","); 22 | return new LocationWeather(random.nextFloat() * 20f + 5f, "sunny", split[1].trim()); 23 | } 24 | 25 | } 26 | -------------------------------------------------------------------------------- /src/main/java/org/infinispan/tutorial/embedded/SerializationContextInitializer.java: -------------------------------------------------------------------------------- 1 | package org.infinispan.tutorial.embedded; 2 | 3 | import org.infinispan.protostream.annotations.AutoProtoSchemaBuilder; 4 | 5 | @AutoProtoSchemaBuilder( 6 | includeClasses = LocationWeather.class, 7 | schemaFileName = "weather.proto", 8 | schemaFilePath = "proto", 9 | schemaPackageName = "org.infinispan.tutorial.embedded" 10 | ) 11 | public interface SerializationContextInitializer extends org.infinispan.protostream.SerializationContextInitializer { 12 | } 13 | -------------------------------------------------------------------------------- /src/main/java/org/infinispan/tutorial/embedded/WeatherApp.java: -------------------------------------------------------------------------------- 1 | package org.infinispan.tutorial.embedded; 2 | 3 | import java.io.IOException; 4 | import java.util.Map; 5 | import java.util.Map.Entry; 6 | import java.util.concurrent.TimeUnit; 7 | 8 | import org.infinispan.Cache; 9 | import org.infinispan.manager.DefaultCacheManager; 10 | import org.infinispan.manager.EmbeddedCacheManager; 11 | import org.infinispan.stream.CacheCollectors; 12 | 13 | import static java.util.stream.Collectors.averagingDouble; 14 | import static java.util.stream.Collectors.groupingBy; 15 | 16 | public class WeatherApp { 17 | 18 | static final String[] locations = { "Rome, Italy", "Como, Italy", "Basel, Switzerland", "Bern, Switzerland", 19 | "London, UK", "Newcastle, UK", "Bucarest, Romania", "Cluj-Napoca, Romania", "Ottawa, Canada", 20 | "Toronto, Canada", "Lisbon, Portugal", "Porto, Portugal", "Raleigh, USA", "Washington, USA" }; 21 | private final EmbeddedCacheManager cacheManager; 22 | private final WeatherService weatherService; 23 | private Cache cache; 24 | private final ClusterListener listener; 25 | 26 | public WeatherApp() throws InterruptedException, IOException { 27 | cacheManager = new DefaultCacheManager(WeatherApp.class.getResourceAsStream("/weatherapp-infinispan.xml")); 28 | listener = new ClusterListener(2); 29 | cacheManager.addListener(listener); 30 | cache = cacheManager.getCache("weather"); 31 | cache.addListener(new CacheListener()); 32 | weatherService = initWeatherService(cache); 33 | 34 | System.out.println("---- Waiting for cluster to form ----"); 35 | listener.clusterFormedLatch.await(); 36 | } 37 | 38 | private WeatherService initWeatherService(Cache cache) { 39 | String apiKey = System.getenv("OWMAPIKEY"); 40 | if (apiKey == null) { 41 | System.out.println("WARNING: OWMAPIKEY environment variable not set, using the RandomWeatherService."); 42 | return new RandomWeatherService(cache); 43 | } else { 44 | return new OpenWeatherMapService(apiKey, cache); 45 | } 46 | } 47 | 48 | public void fetchWeather() { 49 | System.out.println("---- Fetching weather information ----"); 50 | long start = System.currentTimeMillis(); 51 | for (String location : locations) { 52 | LocationWeather weather = weatherService.getWeatherForLocation(location); 53 | System.out.printf("%s - %s\n", location, weather); 54 | } 55 | System.out.printf("---- Fetched in %dms ----\n", System.currentTimeMillis() - start); 56 | } 57 | 58 | public void computeCountryAverages() { 59 | System.out.println("---- Average country temperatures ----"); 60 | Map averages = cache.entrySet().stream() 61 | .collect(CacheCollectors.serializableCollector(() -> groupingBy(e -> e.getValue().country, 62 | averagingDouble(e -> e.getValue().temperature)))); 63 | for(Entry entry : averages.entrySet()) { 64 | System.out.printf("Average temperature in %s is %.1f° C\n", entry.getKey(), entry.getValue()); 65 | } 66 | } 67 | 68 | public void shutdown() throws InterruptedException { 69 | if (!cacheManager.isCoordinator()) { 70 | listener.shutdownLatch.await(); 71 | } 72 | cacheManager.stop(); 73 | } 74 | 75 | public static void main(String[] args) throws Exception { 76 | WeatherApp app = new WeatherApp(); 77 | try { 78 | if (app.cacheManager.isCoordinator()) { 79 | 80 | app.fetchWeather(); 81 | 82 | app.fetchWeather(); 83 | 84 | TimeUnit.SECONDS.sleep(5); 85 | 86 | app.fetchWeather(); 87 | 88 | app.computeCountryAverages(); 89 | } 90 | } finally { 91 | app.shutdown(); 92 | } 93 | 94 | } 95 | 96 | } 97 | -------------------------------------------------------------------------------- /src/main/java/org/infinispan/tutorial/embedded/WeatherService.java: -------------------------------------------------------------------------------- 1 | package org.infinispan.tutorial.embedded; 2 | 3 | public interface WeatherService { 4 | LocationWeather getWeatherForLocation(String location); 5 | } 6 | -------------------------------------------------------------------------------- /src/main/resources/logging.properties: -------------------------------------------------------------------------------- 1 | handlers=java.util.logging.ConsoleHandler 2 | .level=INFO 3 | 4 | java.util.logging.ConsoleHandler.level=INFO 5 | java.util.logging.ConsoleHandler.formatter=java.util.logging.SimpleFormatter 6 | -------------------------------------------------------------------------------- /src/main/resources/weatherapp-infinispan.xml: -------------------------------------------------------------------------------- 1 | 2 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | --------------------------------------------------------------------------------