wchevreuil commented on a change in pull request #3665:
URL: https://github.com/apache/hbase/pull/3665#discussion_r707440847
##########
File path:
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/storefiletracker/StoreFileTrackerFactory.java
##########
@@ -33,22 +36,82 @@
/**
* Factory method for creating store file tracker.
+ * <p/>
+ * The current implementations are:
+ * <ul>
+ * <li><em>default</em>: DefaultStoreFileTracker, see {@link
DefaultStoreFileTracker}.</li>
+ * <li><em>file</em>:FileBasedStoreFileTracker, see {@link
FileBasedStoreFileTracker}.</li>
+ * <li><em>migration</em>:MigrationStoreFileTracker, see {@link
MigrationStoreFileTracker}.</li>
+ * </ul>
+ * @see DefaultStoreFileTracker
+ * @see FileBasedStoreFileTracker
+ * @see MigrationStoreFileTracker
*/
[email protected] public final class StoreFileTrackerFactory {
- public static final String TRACK_IMPL = "hbase.store.file-tracker.impl";
[email protected]
+public final class StoreFileTrackerFactory {
+
private static final Logger LOG =
LoggerFactory.getLogger(StoreFileTrackerFactory.class);
- public static Class<? extends StoreFileTracker>
getStoreFileTrackerImpl(Configuration conf) {
- return conf.getClass(TRACK_IMPL, DefaultStoreFileTracker.class,
StoreFileTracker.class);
+ public static final String TRACKER_IMPL = "hbase.store.file-tracker.impl";
+
+ /**
+ * Maps between configuration names for trackers and implementation classes.
+ */
+ public enum Trackers {
+ DEFAULT(DefaultStoreFileTracker.class),
FILE(FileBasedStoreFileTracker.class),
+ MIGRATION(MigrationStoreFileTracker.class);
+
+ final Class<? extends StoreFileTracker> clazz;
+
+ private Trackers(Class<? extends StoreFileTracker> clazz) {
+ this.clazz = clazz;
+ }
+ }
+
+ private static final Map<Class<? extends StoreFileTracker>, Trackers>
CLASS_TO_ENUM = reverse();
+
+ private static Map<Class<? extends StoreFileTracker>, Trackers> reverse() {
+ Map<Class<? extends StoreFileTracker>, Trackers> map = new HashMap<>();
+ for (Trackers tracker : Trackers.values()) {
+ map.put(tracker.clazz, tracker);
+ }
+ return Collections.unmodifiableMap(map);
+ }
+
+ private StoreFileTrackerFactory() {
+ }
+
+ public static String getStoreFileTrackerName(Configuration conf) {
+ return conf.get(TRACKER_IMPL, Trackers.DEFAULT.name());
+ }
+
+ static String getStoreFileTrackerName(Class<? extends StoreFileTracker>
clazz) {
+ Trackers name = CLASS_TO_ENUM.get(clazz);
+ return name != null ? name.name() : clazz.getName();
+ }
+
+ private static Class<? extends StoreFileTracker>
getTrackerClass(Configuration conf,
+ String configName) {
Review comment:
nit: non used param.
##########
File path:
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/storefiletracker/StoreFileTrackerFactory.java
##########
@@ -64,15 +127,30 @@ public static Configuration
mergeConfigurations(Configuration global, TableDescr
.addStringMap(family.getConfiguration()).addBytesMap(family.getValues());
}
- static StoreFileTrackerBase create(Configuration conf, String configName,
+ /**
+ * Create store file tracker to be used as source or destination for
+ * {@link MigrationStoreFileTracker}.
+ */
+ static StoreFileTrackerBase createForMigration(Configuration conf, String
configName,
boolean isPrimaryReplica, StoreContext ctx) {
- String className =
+ String trackerName =
Preconditions.checkNotNull(conf.get(configName), "config %s is not set",
configName);
Class<? extends StoreFileTrackerBase> tracker;
try {
- tracker =
Class.forName(className).asSubclass(StoreFileTrackerBase.class);
- } catch (ClassNotFoundException e) {
- throw new RuntimeException(e);
+ tracker =
+
Trackers.valueOf(trackerName.toUpperCase()).clazz.asSubclass(StoreFileTrackerBase.class);
+ } catch (IllegalArgumentException e) {
+ // Fall back to them specifying a class name
+ try {
+ tracker =
Class.forName(trackerName).asSubclass(StoreFileTrackerBase.class);
+ } catch (ClassNotFoundException cnfe) {
+ throw new RuntimeException(cnfe);
+ }
Review comment:
Is it worth having this same fallback on the usual create method as well?
##########
File path:
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/storefiletracker/StoreFileTrackerFactory.java
##########
@@ -33,22 +36,82 @@
/**
* Factory method for creating store file tracker.
+ * <p/>
+ * The current implementations are:
+ * <ul>
+ * <li><em>default</em>: DefaultStoreFileTracker, see {@link
DefaultStoreFileTracker}.</li>
+ * <li><em>file</em>:FileBasedStoreFileTracker, see {@link
FileBasedStoreFileTracker}.</li>
+ * <li><em>migration</em>:MigrationStoreFileTracker, see {@link
MigrationStoreFileTracker}.</li>
+ * </ul>
+ * @see DefaultStoreFileTracker
+ * @see FileBasedStoreFileTracker
+ * @see MigrationStoreFileTracker
*/
[email protected] public final class StoreFileTrackerFactory {
- public static final String TRACK_IMPL = "hbase.store.file-tracker.impl";
[email protected]
+public final class StoreFileTrackerFactory {
+
private static final Logger LOG =
LoggerFactory.getLogger(StoreFileTrackerFactory.class);
- public static Class<? extends StoreFileTracker>
getStoreFileTrackerImpl(Configuration conf) {
- return conf.getClass(TRACK_IMPL, DefaultStoreFileTracker.class,
StoreFileTracker.class);
+ public static final String TRACKER_IMPL = "hbase.store.file-tracker.impl";
+
+ /**
+ * Maps between configuration names for trackers and implementation classes.
+ */
+ public enum Trackers {
+ DEFAULT(DefaultStoreFileTracker.class),
FILE(FileBasedStoreFileTracker.class),
+ MIGRATION(MigrationStoreFileTracker.class);
+
+ final Class<? extends StoreFileTracker> clazz;
+
+ private Trackers(Class<? extends StoreFileTracker> clazz) {
Review comment:
nit: redundant modifier.
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