narendly commented on a change in pull request #761: Add REST read endpoints to
helix-rest for metadata store directory
URL: https://github.com/apache/helix/pull/761#discussion_r379218684
##########
File path:
helix-rest/src/main/java/org/apache/helix/rest/server/resources/metadatastore/MetadataStoreDirectoryAccessor.java
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@@ -66,24 +67,44 @@ private void postConstruct() {
}
/**
- * Gets all metadata store realms in a namespace with the endpoint.
+ * Gets all existing namespaces in the routing metadata store at endpoint:
+ * "GET /metadata-store-namespaces"
+ *
+ * @return Json response of all namespaces.
+ */
+ @GET
+ @Path("/metadata-store-namespaces")
+ public Response getAllNamespaces() {
+ Collection<String> namespaces = _metadataStoreDirectory.getAllNamespaces();
+ Map<String, Collection<String>> responseMap =
+
ImmutableMap.of(MetadataStoreRoutingConstants.METADATA_STORE_NAMESPACES,
namespaces);
+
+ return JSONRepresentation(responseMap);
+ }
+
+ /**
+ * Gets all metadata store realms in a namespace at path: "GET
/metadata-store-realms",
+ * or gets a metadata store realm with the sharding key at path:
+ * "GET /metadata-store-realms?sharding-key={sharding-key}"
Review comment:
could we also document the difference in behavior depending on whether the
query param is given?
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