HDDS-11494. Improve the duration option of freon ombg (#7246)

Author: jianghuazhu

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

@@ -290,6 +290,10 @@ public void init() {
       //replace environment variables to support multi-node execution
       prefix = resolvePrefix(prefix);
     }
+    if (duration != null && !allowDuration()) {
+      LOG.warn("--duration is ignored");
+      duration = null;
+    }
     if (duration != null) {
       durationInSecond = TimeDurationUtil.getTimeDurationHelper(
           "--runtime", duration, TimeUnit.SECONDS);
@@ -554,6 +558,15 @@ 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 MetricRegistry getMetrics() {
     return metrics;
   }

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

@@ -57,6 +57,11 @@ public class OmBucketGenerator extends BaseFreonGenerator
 
   private Timer bucketCreationTimer;
 
+  @Override
+  public boolean allowDuration() {
+    return false;
+  }
+
   @Override
   public Void call() throws Exception {