Add and use schematics

README.md

@@ -12,12 +12,16 @@ General Public License v3 or higher.
 Using the invoker
 --
 
+![Using the Invoker](docs/invoker.png "Using the Invoker")
+
 The [Invoker](src/HAB/Solr/Command/Search.php) reads the query parameters from the [Command](src/HAB/Solr/Command/Search.php), 
 optionally merges them with static or dynamic default parameters, and communicates with the Solr backend using a
 [Guzzle](http://guzzlephp.org) HTTP client.
 
 The body of the Solr response is passed to [Command](src/HAB/Solr/Command/Search.php).
 
+
+
 Using the search command
 --
 

docs/invoker.uml

+@startuml
+
+Controller -> Invoker : invoke()
+
+Invoker -> Command : getParameters()
+Invoker <- Command : [ParamBag]
+
+Invoker --> Solr : HTTP Request
+Invoker <-- Solr : HTTP Response
+
+Invoker -> Command : setResponse()
+
+Controller <- Command : getResult()
+
+@enduml