sanpwc commented on code in PR #1729:
URL: https://github.com/apache/ignite-3/pull/1729#discussion_r1160505089
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modules/distribution-zones/src/main/java/org/apache/ignite/internal/distributionzones/DistributionZoneManager.java:
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@@ -505,6 +540,111 @@ public int getZoneId(String name) {
}
}
+ /**
+ * The method for obtaining data nodes of the specified zone.
+ * The flow for the future completion:
+ * Waiting for DistributionZoneManager observe passed topology version or
greater version in topologyWatchListener.
+ * If the {@link
DistributionZoneConfigurationSchema#dataNodesAutoAdjustScaleUp} equals to 0
than wait for writing data nodes triggered
+ * by started nodes and corresponding to the passed topology version or
greater topology version
+ * to the data nodes into the meta storage.
+ * If the {@link
DistributionZoneConfigurationSchema#dataNodesAutoAdjustScaleDown} equals to 0
than wait for writing data nodes
+ * triggered by stopped nodes and corresponding to the passed topology
version or greater topology version
+ * to the data nodes into the meta storage.
+ * After waiting it completes the future with data nodes of the specified
zone.
+ * This method must be invoked in a change configuration closure to
guarantee that the zone is exists and values of scaleUp/scaleDown
+ * timers are up to date.
+ *
+ * @param zoneId Zone id.
+ * @param topVer Topology version.
+ * @return The data nodes future.
+ */
+ public CompletableFuture<Set<String>> topologyVersionedDataNodes(int
zoneId, long topVer) {
+ CompletableFuture<IgniteBiTuple<Boolean, Boolean>> timerValuesFut =
awaitTopologyVersion(topVer)
+ .thenCompose(ignored -> getImmediateTimers(zoneId));
+
+ return allOf(timerValuesFut.thenCompose(timerValues ->
scaleUpAwaiting(zoneId, timerValues.get1())),
+ timerValuesFut.thenCompose(timerValues ->
scaleDownAwaiting(zoneId, timerValues.get2()))
+ )
+ .thenCompose(ignored -> getDataNodesFuture(zoneId));
Review Comment:
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