Apache Ignite是一个内存中数据网格系统，其中包含一个名为ArrayList的数据结构。在将数据写入ArrayList时，可以使用write through模式将数据同时写入关系型数据库（RDBMS）。这样可以保证数据在内存和磁盘上都有备份，提高系统的可靠性和恢复能力。以下是实现该功能的代码示例：

import javax.cache.integration.CacheWriter;
import javax.cache.integration.CacheWriterException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Collection;

public class ArrayListCacheWriter implements CacheWriter {
    private Connection conn;

    public ArrayListCacheWriter(Connection conn) {
        this.conn = conn;
    }

    @Override
    public void write(Integer key, String value) throws CacheWriterException {
        try {
            PreparedStatement stmt = conn.prepareStatement("INSERT INTO myTable VALUES(?, ?)");
            stmt.setInt(1, key);
            stmt.setString(2, value);
            stmt.execute();
        } catch (SQLException e) {
            throw new CacheWriterException("Failed to write value [" + value + "] for key [" + key + "]", e);
        }
    }

    @Override
    public void writeAll(Collection> entries) throws CacheWriterException {
        for (Cache.Entry entry : entries) {
            write(entry.getKey(), entry.getValue());
        }
    }

    @Override
    public void delete(Object key) throws CacheWriterException {
        // 没有实现删除操作
    }

    @Override
    public void deleteAll(Collection keys) throws CacheWriterException {
        // 没有实现删除操作
    }
}

在使用ArrayList时，需要设置CacheWriter来将数据写入关系型数据库。以下是使用ArrayList的代码示例：

import javax.cache.Cache;
import javax.cache.configuration.FactoryBuilder;
import javax.cache.configuration.MutableCacheEntryListenerConfiguration;
import javax.cache.event.CacheEntryCreatedListener;
import org.apache.ignite.Ignition;
import org.apache.ignite.configuration.CacheConfiguration;
import org.apache.ignite.lang.IgniteBiPredicate;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.List;

public class Main {
    public static void main(String[] args) throws SQLException {
        String jdbcUrl = "jdbc:postgresql://localhost:5432/myDb";
        String user = "myUser";
        String password = "myPassword";
        Connection conn = DriverManager.getConnection(jdbc