basic script flow implemented

metrics/cpu.sh

@@ -1,2 +1,5 @@
 #!/bin/sh
-echo $(ps aux | awk {'sum+=$3;print sum'} | tail -n 1)
+
+collect () {
+  echo $(ps aux | awk {'sum+=$3;print sum'} | tail -n 1)
+}

metrics/memory.sh

@@ -1,2 +1,5 @@
 #!/bin/sh
-echo $(free | awk '/buffers\/cache/{print $4/($3+$4) * 100.0;}')
+
+collect () {
+  echo $(free | awk '/buffers\/cache/{print $4/($3+$4) * 100.0;}')
+}

metrics/swap.sh

@@ -1,2 +1,5 @@
 #!/bin/sh
-echo $(free | awk '/Swap/{print $3/$2 * 100.0;}')
+
+collect () {
+  echo $(free | awk '/Swap/{print $3/$2 * 100.0;}')
+}