Respect run ID

Author: triceo

src/main/java/ai/timefold/solver/benchmarks/micro/common/AbstractMain.java

@@ -38,6 +38,7 @@
 import java.time.Instant;
 import java.time.ZoneId;
 import java.util.Arrays;
+import java.util.Objects;
 import java.util.Optional;
 import java.util.Properties;
 
@@ -54,14 +55,13 @@ public abstract class AbstractMain<C extends AbstractConfiguration> {
 
     protected final Logger LOGGER = LoggerFactory.getLogger(getClass());
     private final String subpackage;
-    private final String runId;
     private final Path resultsDirectory;
 
     protected AbstractMain(String subpackage) {
         this.subpackage = subpackage;
-        var runId = System.getenv("RUN_ID");
-        this.runId = runId == null || runId.isBlank() ? getTimestamp() : runId.strip();
-        this.resultsDirectory = Path.of("results", subpackage, getTimestamp());
+        var runId = Objects.requireNonNullElse(System.getenv("RUN_ID"), getTimestamp())
+                .strip();
+        this.resultsDirectory = Path.of("results", subpackage, runId);
         resultsDirectory.toFile().mkdirs();
     }