edwin's journey

Infinispan, or its supported product which is Red Hat DataGrid, is a very strong in-memory data grid product which offers flexible deployment options and robust capabilities for storing, managing, and processing data. And to maintain high availability and fault tolerance, Infinispan provides a clustering mechanism which have a multiple members.

For this article, im trying to create a cluster which consist of 3 Infinispan instances and all instances are being installed by using docker images. First we need to pull a specific Infinispan image,

$ docker pull infinispan/server:14.0.2.Final

And run 3 different instances of Infinispan,

$ docker run -p 11222:11222 -e USER=admin -e PASS=password \
        --add-host=HOST:192.168.56.1 \ 
        infinispan/server:14.0.2.Final
		
$ docker run -p 11223:11222 -e USER=admin -e PASS=password \
        --add-host=HOST:192.168.56.1 \ 
        infinispan/server:14.0.2.Final		

$ docker run -p 11224:11222 -e USER=admin -e PASS=password \
        --add-host=HOST:192.168.56.1 \ 
        infinispan/server:14.0.2.Final

Next is login to one of Infinispan instances which is located in localhost:11222, and login with credential of “admin” and “password”. A successfully cluster will give this display,

Once every Infinispan instances are started, we can now focus on our Java project. Lets start with pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.edw</groupId>
    <artifactId>spring-boot-and-clustered-infinispan</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <version.infinispan>14.0.7.Final</version.infinispan>
        <version.protostream>4.6.2.Final</version.protostream>
        <version.spring.boot3>3.0.4</version.spring.boot3>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.infinispan</groupId>
                <artifactId>infinispan-bom</artifactId>
                <version>${version.infinispan}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-parent</artifactId>
                <version>${version.spring.boot3}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>


    <dependencies>
        <!-- Spring Boot -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- infinispan -->
        <dependency>
            <groupId>org.infinispan</groupId>
            <artifactId>infinispan-spring-boot3-starter-remote</artifactId>
        </dependency>
        <dependency>
            <groupId>org.infinispan</groupId>
            <artifactId>infinispan-query</artifactId>
        </dependency>
        <dependency>
            <groupId>org.infinispan</groupId>
            <artifactId>infinispan-remote-query-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.infinispan.protostream</groupId>
            <artifactId>protostream-processor</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.infinispan</groupId>
            <artifactId>infinispan-client-hotrod</artifactId>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

And an application.properties, in here we can define how many instances of Infinispan that we are connecting to. For this sample, im putting 3 instances which are each having their own ip.

### server port
server.port=8080
spring.application.name=Spring Boot and Clustered Infinispan

## logging
logging.level.root=INFO
logging.pattern.console=%d{dd-MM-yyyy HH:mm:ss} %magenta([%thread]) %highlight(%-5level) %logger.%M - %msg%n

# infinispan
infinispan.remote.server-list=172.17.0.2:11222;172.17.0.3:11222;172.17.0.4:11222
infinispan.remote.auth-username=admin
infinispan.remote.auth-password=password
infinispan.remote.marshaller=org.infinispan.commons.marshall.ProtoStreamMarshaller

And create several Spring Boot’s Java classes, such as main class, controllers, beans, and configs.

@EnableCaching
@SpringBootApplication
public class Main {
    public static void main(String[] args) {
        SpringApplication.run(Main.class, args);
    }
}

@RestController
public class IndexController {

    @Autowired
    private RemoteCacheManager cacheManager;

    @GetMapping(path = "/")
    public HashMap index() {
        return new HashMap(){{
            put("hello", "world");
        }};
    }

    @GetMapping(path = "/get-user")
    public User getUsers(@RequestParam String name) {
        return (User) cacheManager.getCache("user-cache").getOrDefault(name, new User());
    }

    @GetMapping(path = "/add-user")
    public User addUsers(@RequestParam String name, @RequestParam Integer age, @RequestParam String address) {
        cacheManager.getCache("user-cache").put(name, new User(name, age, address));
        return (User) cacheManager.getCache("user-cache").getOrDefault(name, new User());
    }

}

public class User implements Serializable {
    private String name;

    private Integer age;

    private String address;

    public User() {
    }

    public User(String name, Integer age, String address) {
        this.name = name;
        this.age = age;
        this.address = address;
    }

    @ProtoField(number = 1, required = true)
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @ProtoField(number = 2)
    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    @ProtoField(number = 3)
    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }
}

@Configuration
public class InfinispanConfiguration {
    @Bean
    @Order(Ordered.HIGHEST_PRECEDENCE)
    public InfinispanRemoteCacheCustomizer remoteCacheCustomizer() {
        return b -> {
            b.remoteCache("user-cache").marshaller(ProtoStreamMarshaller.class);
        };
    }
}

@Component
public class InfinispanInitializer implements CommandLineRunner {

    @Autowired
    private RemoteCacheManager cacheManager;

    @Override
    public void run(String...args) throws Exception {
        SerializationContext ctx = MarshallerUtil.getSerializationContext(cacheManager);
        RemoteCache<String, String> protoMetadataCache = cacheManager.getCache(ProtobufMetadataManagerConstants.PROTOBUF_METADATA_CACHE_NAME);

        String msgSchemaFile = null;
        try {
            ProtoSchemaBuilder protoSchemaBuilder = new ProtoSchemaBuilder();
            msgSchemaFile = protoSchemaBuilder.fileName("user.proto").packageName("user").addClass(User.class).build(ctx);
            protoMetadataCache.put("user.proto", msgSchemaFile);
        } catch (Exception e) {
            throw new RuntimeException("Failed to build protobuf definition from 'User class'", e);
        }

        String errors = protoMetadataCache.get(ProtobufMetadataManagerConstants.ERRORS_KEY_SUFFIX);
        if (errors != null) {
            throw new IllegalStateException("Some Protobuf schema files contain errors: " + errors + "\nSchema :\n" + msgSchemaFile);
        }
    }
}

Run the code and try do some curl to add and retrieve data from cache,

$ curl -kv http://localhost:8080/add-user?name=lele&age=14&address=Jogja
{"name":"lele","age":14,"address":"Jogja"} 

$ curl -kv http://localhost:8080/get-user?name=lele
{"name":"lele","age":14,"address":"Jogja"} 

And we can check the content of our cache from our dashboard,

Have fun with Infinispan.

https://github.com/edwin/spring-boot-and-clustered-infinispan