Radeity commented on code in PR #252:
URL: 
https://github.com/apache/incubator-hugegraph-computer/pull/252#discussion_r1216712217


##########
computer-api/src/main/java/org/apache/hugegraph/computer/core/config/ComputerOptions.java:
##########
@@ -420,6 +420,14 @@ public static synchronized ComputerOptions instance() {
                     10000
             );
 
+    public static final ConfigOption<String> JOB_NAMESPACE =
+            new ConfigOption<>(
+                    "job.namespace",
+                    "The job namespace can seperate different data source.",
+                    null,
+                    "default"

Review Comment:
   If we set it null, value.getClass() will throw exeception.
   ```java
   public ConfigOption(String name, String desc, Predicate<T> pred, T value) {
        this(name, false, desc, pred, (Class<T>) value.getClass(), value);
   }
   ```
   If we set it "", default path will be `//local_001`, can we add a non-null 
judgement in `constructPath`? Like:
   ```java
       protected String constructPath(BspEvent event, Object... paths) {
           StringBuilder sb = new StringBuilder();
           if (event != null) {
               // TODO: replace event.code() with event.name()
               sb.append(event.name());
           }
           for (Object path : paths) {
               if (!StringUtils.isEmpty(path.toString())) {
                   sb.append("/").append(path);
               }
           }
           return sb.toString();
       }
   ```



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