sanpwc commented on a change in pull request #103:
URL: https://github.com/apache/ignite-3/pull/103#discussion_r620151195
##########
File path:
modules/affinity/src/main/java/org/apache/ignite/internal/affinity/AffinityManager.java
##########
@@ -52,9 +72,121 @@ public AffinityManager(
this.configurationMgr = configurationMgr;
this.metaStorageMgr = metaStorageMgr;
this.baselineMgr = baselineMgr;
+
+ String localNodeName =
configurationMgr.configurationRegistry().getConfiguration(NetworkConfiguration.KEY)
+ .name().value();
+
+
configurationMgr.configurationRegistry().getConfiguration(LocalConfiguration.KEY)
+ .metastorageMembers().listen(ctx -> {
+ if (ctx.newValue() != null) {
+ if (hasMetastorageLocally(localNodeName, ctx.newValue()))
+ subscribeToAssignmentCalculation();
+ else
+ unsubscribeFromAssignmentCalculation();
+ }
+ return CompletableFuture.completedFuture(null);
+ });
+
+ String[] metastorageMembers =
configurationMgr.configurationRegistry().getConfiguration(LocalConfiguration.KEY)
+ .metastorageMembers().value();
+
+ if (hasMetastorageLocally(localNodeName, metastorageMembers))
+ subscribeToAssignmentCalculation();
}
- // TODO: IGNITE-14237 Affinity function.
- // TODO: IGNITE-14238 Creating and destroying caches.
- // TODO: IGNITE-14235 Provide a minimal cache/table configuration.
+ /**
+ * Checks whether the local node hosts Metastorage.
+ *
+ * @param localNodeName Local node uniq name.
+ * @param metastorageMembers Metastorage members names.
+ * @return True if the node has Metastorage, false otherwise.
+ */
+ private boolean hasMetastorageLocally(String localNodeName, String[]
metastorageMembers) {
+ boolean isLocalNodeHasMetasorage = false;
+
+ for (String name : metastorageMembers) {
+ if (name.equals(localNodeName)) {
+ isLocalNodeHasMetasorage = true;
+
+ break;
+ }
+ }
+ return isLocalNodeHasMetasorage;
+ }
+
+ /**
+ * Subscribes to metastorage members update.
+ */
+ private void subscribeToAssignmentCalculation() {
+ assert affinityCalculateSubscriptionFut == null : "Affinity
calculation already subscribed";
+
+ String tableInternalPrefix = INTERNAL_PREFIX + "assignment.#";
+
+ affinityCalculateSubscriptionFut = metaStorageMgr.registerWatch(new
Key(tableInternalPrefix), new WatchListener() {
+ @Override public boolean onUpdate(@NotNull Iterable<WatchEvent>
events) {
+ for (WatchEvent evt : events) {
+ if (ArrayUtils.empty(evt.newEntry().value())) {
+ String keyTail =
evt.newEntry().key().toString().substring(INTERNAL_PREFIX.length());
+
+ String placeholderValue = keyTail.substring(0,
keyTail.indexOf('.'));
+
+ UUID tblId = UUID.fromString(placeholderValue);
+
+ try {
+ String name = new String(metaStorageMgr.get(
+ new Key(INTERNAL_PREFIX +
tblId.toString())).get()
+ .value(), StandardCharsets.UTF_8);
+
+ int partitions =
configurationMgr.configurationRegistry().getConfiguration(TablesConfiguration.KEY)
+ .tables().get(name).partitions().value();
+ int replicas =
configurationMgr.configurationRegistry().getConfiguration(TablesConfiguration.KEY)
+ .tables().get(name).replicas().value();
+
+ metaStorageMgr.put(evt.newEntry().key(),
IgniteUtils.toBytes(
Review comment:
Please use invoke instead of put, with cas based on revision of empty
INTERNAL_PREFIX + "assignment.<tblId>".
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