import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import org.junit.Test;
import java.util.concurrent.TimeUnit;
 
public class TestCode {
    @Test
    public void testName() throws Exception {
        LoadingCache<String, String> graphs = CacheBuilder.newBuilder()
                .maximumSize(1000)
                .expireAfterWrite(10, TimeUnit.MINUTES).build(new CacheLoader<String, String>() {
                    @Override
                    public String load(String key) throws Exception {
                        System.out.println("call load");
                        return "new body";
                    }
                });
 
        graphs.put("someKey1", "Hello World");
        System.out.println(graphs.get("someKey1"));
        System.out.println(graphs.get("someKey"));
        System.out.println(graphs.get("someKey"));
 
    }
}