avijayanhwx commented on a change in pull request #2040:
URL: https://github.com/apache/ozone/pull/2040#discussion_r595712699
##########
File path:
hadoop-hdds/common/src/main/java/org/apache/hadoop/hdds/upgrade/HDDSLayoutVersionManager.java
##########
@@ -31,12 +43,61 @@
public class HDDSLayoutVersionManager extends
AbstractLayoutVersionManager<HDDSLayoutFeature> {
+ private static final Logger LOG =
+ LoggerFactory.getLogger(HDDSLayoutVersionManager.class);
+ private static final String[] HDDS_CLASS_UPGRADE_PACKAGES = new String[]{
+ "org.apache.hadoop.hdds.server.scm",
+ "org.apache.hadoop.ozone.container"};
+
public HDDSLayoutVersionManager(int layoutVersion) throws IOException {
init(layoutVersion, HDDSLayoutFeature.values());
+ registerUpgradeActions(HDDS_CLASS_UPGRADE_PACKAGES);
}
public static int maxLayoutVersion() {
HDDSLayoutFeature[] features = HDDSLayoutFeature.values();
return features[features.length - 1].layoutVersion();
}
+
+ /**
+ * Scan classpath and register all actions to layout features.
+ */
+ @VisibleForTesting
+ void registerUpgradeActions(String[] packageNames) {
Review comment:
Yes, I agree. But, in this case the classpath loading is more
investigative. It does not need to find any upgrade action at all. If it does
find one, we will register it.
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