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_r379228170
##########
File path:
helix-rest/src/main/java/org/apache/helix/rest/server/resources/metadatastore/MetadataStoreDirectoryAccessor.java
##########
@@ -111,41 +132,56 @@ public Response
deleteMetadataStoreRealm(@PathParam("realm") String realm) {
}
/**
- * Gets sharding keys mapped at path "HTTP GET /sharding-keys" which returns
all sharding keys in
- * a namespace, or path "HTTP GET /sharding-keys?realm={realmName}" which
returns sharding keys in
- * a realm.
+ * Gets all sharding keys mapped at paths:
+ * - "HTTP GET /sharding-keys" which returns all sharding keys in a
namespace.
+ * - "HTTP GET /sharding-keys?realm={realm}" which returns sharding keys in
the realm.
+ * - "HTTP GET /sharding-keys?prefix={prefix}" which returns sharding keys
that have the prefix.
+ * -- JSON response example for this path:
+ * {
+ * "prefix": "/sharding/key",
+ * "shardingKeys": [{
+ * "realm": "testRealm2",
+ * "shardingKey": "/sharding/key/1/f"
+ * }, {
+ * "realm": "testRealm2",
+ * "shardingKey": "/sharding/key/1/e"
+ * }, {
+ * "realm": "testRealm1",
+ * "shardingKey": "/sharding/key/1/b"
+ * }, {
+ * "realm": "testRealm1",
+ * "shardingKey": "/sharding/key/1/a"
+ * }]
+ * }
+ *
+ * - "HTTP GET /sharding-keys?realm={realm}&prefix={prefix}" which returns
sharding keys in the
+ * realm and that have the prefix.
*
- * @param realm Query param in endpoint path
- * @return Json representation of a map: shardingKeys -> collection of
sharding keys.
+ * @param realm Query param in endpoint path: metadata store realm.
+ * @param prefix Query param in endpoint path: prefix substring of sharding
key.
+ * @return Json representation for the sharding keys.
*/
@GET
@Path("/sharding-keys")
- public Response getShardingKeys(@QueryParam("realm") String realm) {
- Map<String, Object> responseMap;
- Collection<String> shardingKeys;
+ public Response getShardingKeys(@QueryParam("realm") String realm,
Review comment:
I have a feeling that this path resource is again doing too many things. Do
you think we should consider breaking this up into different path resources?
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