Check how pljava.libjvm_location has been set

Author: jcflack

CI/integration

@@ -233,6 +233,40 @@ try (
 
     succeeding = true; // become optimistic, will be using &= below
 
+    succeeding &= stateMachine(
+      "check pljava.libjvm_location",
+      null,
+
+      q(c, "SHOW pljava.libjvm_location")
+      .flatMap(Node::semiFlattenDiagnostics),
+
+      // state 1: consume any diagnostics, or to state 2 with same item
+      (o,p,q) -> {
+        if ( ! isDiagnostic(o, Set.of("error")) )
+          return -2;
+        Node.peek(o);
+        return 1;
+      },
+
+      (o,p,q) -> { // state 2
+        if ( ! ( o instanceof ResultSet ) )
+          return false;
+        ResultSet rs = (ResultSet)o;
+        if ( ! rs.next() )
+          return false;
+        System.err.println("pljava.libjvm_location: " + rs.getString(1));
+        if ( rs.next() )
+          return false;
+        return 3;
+      },
+
+      // state 3: must be end of input
+      (o,p,q) -> null == o
+    );
+  }
+
+  try ( Connection c = n1.connect() )
+  {
     succeeding &= stateMachine(
       "create extension no result",
       null,