HDDS-11494. Improve the duration option of freon

hadoop-ozone/tools/src/main/java/org/apache/hadoop/ozone/freon/BaseFreonGenerator.java

@@ -290,7 +290,7 @@ public void init() {
       //replace environment variables to support multi-node execution
       prefix = resolvePrefix(prefix);
     }
-    if (duration != null) {
+    if (duration != null && allowDuration()) {
       durationInSecond = TimeDurationUtil.getTimeDurationHelper(
           "--runtime", duration, TimeUnit.SECONDS);
       if (durationInSecond <= 0) {
@@ -327,7 +327,7 @@ public void init() {
     executor = Executors.newFixedThreadPool(threadNo);
     long maxValue;
     LongSupplier supplier;
-    if (duration != null) {
+    if (duration != null && allowDuration()) {
       maxValue = durationInSecond;
       supplier = () -> Duration.between(
           Instant.ofEpochMilli(startTime), Instant.now()).getSeconds();
@@ -554,6 +554,19 @@ public String getPrefix() {
     return prefix;
   }
 
+  /**
+   * Whether to enable Duration.
+   * If enabled, the command will load the --duration option.
+   * If not enabled, the command will not load the --duration option.
+   */
+  public boolean allowDuration() {
+    return true;
+  }
+
+  public String getDuration() {
+    return duration;
+  }
+
   public MetricRegistry getMetrics() {
     return metrics;
   }

hadoop-ozone/tools/src/main/java/org/apache/hadoop/ozone/freon/OmBucketGenerator.java

@@ -26,6 +26,8 @@
 import org.apache.hadoop.ozone.om.protocol.OzoneManagerProtocol;
 
 import com.codahale.metrics.Timer;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import picocli.CommandLine.Command;
 import picocli.CommandLine.Option;
 
@@ -41,6 +43,8 @@
 public class OmBucketGenerator extends BaseFreonGenerator
     implements Callable<Void> {
 
+  private static final Logger LOG = LoggerFactory.getLogger(OmBucketGenerator.class);
+
   @Option(names = {"-v", "--volume"},
       description = "Name of the volume which contains the test data. Will be"
           + " created if missing.",
@@ -57,8 +61,16 @@ public class OmBucketGenerator extends BaseFreonGenerator
 
   private Timer bucketCreationTimer;
 
+  @Override
+  public boolean allowDuration() {
+    return false;
+  }
+
   @Override
   public Void call() throws Exception {
+    if (getDuration() != null) {
+      LOG.warn("When running ombg, setting --duration has no effect.");
+    }
 
     init();