Apache Ignite JTA example

Main.java

package org.example;

import org.apache.ignite.Ignite;
import org.apache.ignite.Ignition;
import org.apache.ignite.cache.CacheAtomicityMode;
import org.apache.ignite.configuration.CacheConfiguration;
import org.apache.ignite.configuration.IgniteConfiguration;
import org.apache.ignite.configuration.TransactionConfiguration;
import org.apache.ignite.transactions.Transaction;
import org.apache.ignite.transactions.TransactionState;
import org.objectweb.jotm.Jotm;
import org.objectweb.jotm.rmi.RmiLocalConfiguration;

import javax.transaction.UserTransaction;

public class Main {
    public static void main(String[] args) throws Exception {
        // Three steps to use JTA with Ignite
        // 1. Set up your TransactionManager of choice (here we use JOTM).
        // 2. Pass the TransactionManager to Ignite TransactionConfiguration.
        // 3. Obtain UserTransaction (usually from DI container) and use it to start/commit/rollback transactions.
        var jotm = new Jotm(true, false, new RmiLocalConfiguration());
        var txCfg = new TransactionConfiguration().setTxManagerFactory(jotm::getTransactionManager);
        var igniteCfg = new IgniteConfiguration().setTransactionConfiguration(txCfg);

        var ignite = Ignition.start(igniteCfg);
        igniteJtaDemo(ignite, jotm.getUserTransaction());
    }

    public static void igniteJtaDemo(Ignite ignite, UserTransaction userTx) throws Exception {
        var cacheCfg = new CacheConfiguration<Integer, Integer>("c")
                .setAtomicityMode(CacheAtomicityMode.TRANSACTIONAL);

        var cache = ignite.getOrCreateCache(cacheCfg);

        userTx.begin();
        cache.put(1, 1);
        assert cache.get(1) == 1;

        Transaction igniteTx = ignite.transactions().tx();
        assert igniteTx.state() == TransactionState.ACTIVE;

        userTx.rollback();
        assert cache.get(1) == null;
    }
}

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>org.example</groupId>
    <artifactId>IgniteJta</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>11</maven.compiler.source>
        <maven.compiler.target>11</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.apache.ignite</groupId>
            <artifactId>ignite-core</artifactId>
            <version>2.12.0</version>
        </dependency>

        <dependency>
            <groupId>org.apache.ignite</groupId>
            <artifactId>ignite-jta</artifactId>
            <version>2.12.0</version>
        </dependency>

        <dependency>
            <groupId>org.ow2.jotm</groupId>
            <artifactId>jotm-core</artifactId>
            <version>2.3.1-M1</version>
        </dependency>

        <dependency>
            <groupId>javax.resource</groupId>
            <artifactId>connector-api</artifactId>
            <version>1.5</version>
        </dependency>

        <dependency>
            <groupId>javax.transaction</groupId>
            <artifactId>jta</artifactId>
            <version>1.1</version>
        </dependency>

    </dependencies>

</project>