Add counter for mock invocations

src/main/groovy/com/blogspot/przybyszd/mockserver/ContextExecutor.groovy

@@ -0,0 +1,44 @@
+package com.blogspot.przybyszd.mockserver
+
+import com.sun.net.httpserver.HttpExchange
+import groovy.util.slurpersupport.GPathResult
+
+import java.util.concurrent.CopyOnWriteArrayList
+
+class ContextExecutor {
+    private final HttpServerWraper httpServerWraper
+    private final String path
+    private final List<Mock> mocks
+
+    ContextExecutor(HttpServerWraper httpServerWraper, String path, Mock initialMock) {
+        this.httpServerWraper = httpServerWraper
+        this.path = path
+        this.mocks = new CopyOnWriteArrayList<>([initialMock])
+        httpServerWraper.createContext(path,{
+            HttpExchange ex ->
+                ex.sendResponseHeaders(200, 0)
+                String input = ex.requestBody.text
+                println "Mock received input"
+                GPathResult xml = new XmlSlurper().parseText(input)
+                for (Mock mock : mocks){
+                    if(mock.predicate(xml)){
+                        println "Mock ${mock.name} invoked"
+                        ++mock.counter
+                        ex.responseBody << mock.responseOk(xml)
+                        ex.responseBody.close()
+                        return
+                    }
+                }
+                ex.responseBody << "<invalidInput/>"
+                ex.responseBody.close()
+        })
+    }
+
+    int removeMock(String name) {
+        Mock mock = mocks.find {it.name == name}
+        if(mock){
+            mocks.remove(mock)
+        }
+        return mock.counter
+    }
+}