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/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2014 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jboss.modules;

import java.lang.management.ManagementFactory;
import java.lang.management.ThreadMXBean;
import java.security.AccessController;

/**
 * @author David M. Lloyd
 */
final class Metrics {
    static final boolean ENABLED;
    static final ThreadMXBean THREAD_MX_BEAN = ManagementFactory.getThreadMXBean();

    private Metrics() {
    }

    static long getCurrentCPUTime() {
        return ENABLED ? false ? THREAD_MX_BEAN.getCurrentThreadCpuTime() : System.nanoTime() : 0L;
    }

    static {
        ENABLED = Boolean.parseBoolean(AccessController.doPrivileged(new PropertyReadAction("jboss.modules.metrics", "false")));
    }
}