--- /dev/null	2015-08-04 16:55:50.726524033 +0300
+++ new/test/compiler/compilercontrol/share/scenario/CommandGenerator.java	2015-09-28 15:03:27.184697207 +0300
@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package compiler.compilercontrol.share.scenario;
+
+import jdk.test.lib.Utils;
+
+import java.util.List;
+import java.util.Random;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+/**
+ * Generates random commands
+ */
+public class CommandGenerator {
+    private static final int MAX_COMMANDS = Integer.getInteger(
+            "compiler.compilercontrol.share.scenario.CommandGenerator.commands",
+            100);
+    private static final Random RANDOM = Utils.getRandomInstance();
+
+    /**
+     * Generates random command
+     *
+     * @return command
+     */
+    public Command generateCommand() {
+        return Utils.getRandomElement(Command.values());
+    }
+
+    /**
+     * Generates random number of random command
+     *
+     * @return a list of random commands
+     */
+    public List<Command> generateCommands() {
+        int amount = 1 + RANDOM.nextInt(MAX_COMMANDS - 1);
+        return generateCommands(amount);
+    }
+
+    /**
+     * Generates specified amount of random command
+     *
+     * @param amount amount of commands to generate
+     * @return a list of random commands
+     */
+    public List<Command> generateCommands(int amount) {
+        return Stream.generate(this::generateCommand)
+                .limit(amount)
+                .collect(Collectors.toList());
+    }
+
+    /**
+     * Generates random type of the scenario
+     * {@link Scenario.Type}
+     */
+    public Scenario.Type generateCommandType() {
+        return Utils.getRandomElement(Scenario.Type.values());
+    }
+
+    /**
+     * Generates type of compiler that should be used for the command, or null
+     * if any or all compilers should be used
+     *
+     * @return Compiler value, or null
+     */
+    public State.Compiler generateCompiler() {
+        State.Compiler[] compilers = State.Compiler.values();
+        int compiler = RANDOM.nextInt(compilers.length + 1) - 1;
+        return (compiler != -1) ? compilers[compiler] : null;
+    }
+}