1 files changed, 67 insertions, 0 deletions
diff --git a/src/commands/msetnx.json b/src/commands/msetnx.json
new file mode 100644
index 0000000..27592d3
--- /dev/null
+++ b/src/commands/msetnx.json
@@ -0,0 +1,67 @@
+{
+    "MSETNX": {
+        "summary": "Atomically modifies the string values of one or more keys only when all keys don't exist.",
+        "complexity": "O(N) where N is the number of keys to set.",
+        "group": "string",
+        "since": "1.0.1",
+        "arity": -3,
+        "function": "msetnxCommand",
+        "command_flags": [
+            "WRITE",
+            "DENYOOM"
+        ],
+        "acl_categories": [
+            "STRING"
+        ],
+        "key_specs": [
+            {
+                "flags": [
+                    "OW",
+                    "INSERT"
+                ],
+                "begin_search": {
+                    "index": {
+                        "pos": 1
+                    }
+                },
+                "find_keys": {
+                    "range": {
+                        "lastkey": -1,
+                        "step": 2,
+                        "limit": 0
+                    }
+                }
+            }
+        ],
+        "reply_schema": {
+            "oneOf": [
+                {
+                    "description": "No key was set (at least one key already existed).",
+                    "const": 0
+                },
+                {
+                    "description": "All the keys were set.",
+                    "const": 1
+                }
+            ]
+        },
+        "arguments": [
+            {
+                "name": "data",
+                "type": "block",
+                "multiple": true,
+                "arguments": [
+                    {
+                        "name": "key",
+                        "type": "key",
+                        "key_spec_index": 0
+                    },
+                    {
+                        "name": "value",
+                        "type": "string"
+                    }
+                ]
+            }
+        ]
+    }
+}