spacewander commented on a change in pull request #4559:
URL: https://github.com/apache/apisix/pull/4559#discussion_r666933079



##########
File path: apisix/plugins/request-id.lua
##########
@@ -14,36 +14,163 @@
 -- See the License for the specific language governing permissions and
 -- limitations under the License.
 --
-local core          = require("apisix.core")
-local plugin_name   = "request-id"
-local ngx           = ngx
-local uuid          = require("resty.jit-uuid")
+
+local ngx = ngx
+local bit = require("bit")
+local core = require("apisix.core")
+local snowflake = require("snowflake")
+local uuid = require("resty.jit-uuid")
+local process = require("ngx.process")
+local tostring = tostring
+local math_pow = math.pow
+
+local plugin_name = "request-id"
+
+local worker_number = nil
+local snowflake_init = nil
+
+local attr = nil
 
 local schema = {
     type = "object",
     properties = {
         header_name = {type = "string", default = "X-Request-Id"},
-        include_in_response = {type = "boolean", default = true}
+        include_in_response = {type = "boolean", default = true},
+        algorithm = {type = "string", enum = {"uuid", "snowflake"}, default = 
"uuid"}
     }
 }
 
+local attr_schema = {
+    type = "object",
+    properties = {
+        snowflake = {
+            type = "object",
+            properties = {
+                enable = {type = "boolean"},
+                snowflake_epoc = {type = "integer", minimum = 1, default = 
1609459200000},
+                node_id_bits = {type = "integer", minimum = 1, default = 5},
+                sequence_bits = {type = "integer", minimum = 1, default = 10},
+                datacenter_id_bits = {type = "integer", minimum = 1, default = 
5},

Review comment:
       Maybe "default = 7" is better? One of the largest APISIX user have more 
than 2000 workers. They don't want to be in trouble when using the default 
value.




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