Complete README

README.md

@@ -13,13 +13,53 @@ Build
 Example Usage
 =============
 ```sh
+$ cat example/data.json
+{
+    "counter": 1234,
+    "values": [
+        {
+            "id": "id-A",
+            "count": 1,
+            "state": "ACTIVE"
+        },
+        {
+            "id": "id-B",
+            "count": 2,
+            "state": "INACTIVE"
+        },
+        {
+            "id": "id-C",
+            "count": 3,
+            "state": "ACTIVE"
+        },
+    ]
+}
+
+$ cat example/config.yml
+- name: example_global_value
+  path: $.counter
+  labels:
+    environment: beta # static label
+
+- name: example_value
+  type: object
+  path: $.values[*]?(@.state == "ACTIVE")
+  labels:
+    environment: beta # static label
+    id: $.id          # dynamic label
+  values:
+    active: 1      # static value
+    count: $.count # dynamic value
+
 $ python -m SimpleHTTPServer 8000 &
 Serving HTTP on 0.0.0.0 port 8000 ...
+
 $ ./json_exporter http://localhost:8000/example/data.json example/config.yml &
 INFO[2016-02-08T22:44:38+09:00] metric registered;name:<example_global_value>
 INFO[2016-02-08T22:44:38+09:00] metric registered;name:<example_value_active>
 INFO[2016-02-08T22:44:38+09:00] metric registered;name:<example_value_count>
 127.0.0.1 - - [08/Feb/2016 22:44:38] "GET /example/data.json HTTP/1.1" 200 -
+
 $ curl http://localhost:7979/metrics | grep ^example
 example_global_value{environment="beta"} 1234
 example_value_active{environment="beta",id="id-A"} 1