[SPEC] Updated cluster.state spec

rest-api-spec/api/cluster.state.json

@@ -4,33 +4,23 @@
     "methods": ["GET"],
     "url": {
       "path": "/_cluster/state",
-      "paths": ["/_cluster/state"],
-      "parts": {},
+      "paths": [
+        "/_cluster/state",
+        "/_cluster/state/{metric}",
+        "/_cluster/state/{metric}/{index}"
+      ],
+      "parts": {
+        "index": {
+          "type" : "list",
+          "description" : "A comma-separated list of index names; use `_all` or empty string to perform the operation on all indices"
+        },
+        "metric" : {
+          "type" : "list",
+          "options" : ["_all", "blocks", "index_templates", "metadata", "nodes", "routing_table"],
+          "description" : "Limit the information returned to the specified metrics"
+        }
+      },
       "params": {
-        "filter_blocks": {
-          "type": "boolean",
-          "description": "Do not return information about blocks"
-        },
-        "filter_index_templates": {
-          "type": "boolean",
-          "description": "Do not return information about index templates"
-        },
-        "filter_indices": {
-          "type": "list",
-          "description": "Limit returned metadata information to specific indices"
-        },
-        "filter_metadata": {
-          "type": "boolean",
-          "description": "Do not return information about indices metadata"
-        },
-        "filter_nodes": {
-          "type": "boolean",
-          "description": "Do not return information about nodes"
-        },
-        "filter_routing_table": {
-          "type": "boolean",
-          "description": "Do not return information about shard allocation (`routing_table` and `routing_nodes`)"
-        },
         "local": {
           "type": "boolean",
           "description": "Return local information, do not retrieve the state from master node (default: false)"