443652 - Remove dependency on java.lang.management classes

* Created safer Uptime singleton for use
* Removed direct references to java.lang.management from
   - Server.java
   - Log.java
   - AbstractLifeCycle.java

jetty-server/src/main/java/org/eclipse/jetty/server/Server.java

@@ -19,7 +19,6 @@
 package org.eclipse.jetty.server;
 
 import java.io.IOException;
-import java.lang.management.ManagementFactory;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.net.URI;
@@ -53,6 +52,7 @@ import org.eclipse.jetty.util.AttributesMap;
 import org.eclipse.jetty.util.Jetty;
 import org.eclipse.jetty.util.MultiException;
 import org.eclipse.jetty.util.URIUtil;
+import org.eclipse.jetty.util.Uptime;
 import org.eclipse.jetty.util.annotation.ManagedAttribute;
 import org.eclipse.jetty.util.annotation.ManagedObject;
 import org.eclipse.jetty.util.annotation.Name;
@@ -376,7 +376,7 @@ public class Server extends HandlerWrapper implements Attributes
 
         mex.ifExceptionThrow();
 
-        LOG.info(String.format("Started @%dms",ManagementFactory.getRuntimeMXBean().getUptime()));
+        LOG.info(String.format("Started @%dms",Uptime.getUptime()));
     }
 
     @Override

jetty-util/src/main/java/org/eclipse/jetty/util/Uptime.java

@@ -0,0 +1,127 @@
+//
+//  ========================================================================
+//  Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
+//  ------------------------------------------------------------------------
+//  All rights reserved. This program and the accompanying materials
+//  are made available under the terms of the Eclipse Public License v1.0
+//  and Apache License v2.0 which accompanies this distribution.
+//
+//      The Eclipse Public License is available at
+//      http://www.eclipse.org/legal/epl-v10.html
+//
+//      The Apache License v2.0 is available at
+//      http://www.opensource.org/licenses/apache2.0.php
+//
+//  You may elect to redistribute this code under either of these licenses.
+//  ========================================================================
+//
+
+package org.eclipse.jetty.util;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+/**
+ * Provide for a Uptime class that is compatible with Android and the new Java 8 compact1 and compact2 environments.
+ */
+public class Uptime
+{
+    public static final int NOIMPL = -1;
+
+    public static interface Impl
+    {
+        public long getUptime();
+    }
+
+    public static class DefaultImpl implements Impl
+    {
+        public Object mxBean;
+        public Method uptimeMethod;
+
+        public DefaultImpl()
+        {
+            ClassLoader cl = Thread.currentThread().getContextClassLoader();
+            try
+            {
+                Class<?> mgmtFactory = Class.forName("java.lang.management.ManagementFactory",true,cl);
+                Class<?> runtimeClass = Class.forName("java.lang.management.RuntimeMXBean",true,cl);
+                Class<?> noparams[] = new Class<?>[0];
+                Method mxBeanMethod = mgmtFactory.getMethod("getRuntimeMXBean",noparams);
+                if (mxBeanMethod == null)
+                {
+                    throw new UnsupportedOperationException("method getRuntimeMXBean() not found");
+                }
+                mxBean = mxBeanMethod.invoke(mgmtFactory);
+                if (mxBean == null)
+                {
+                    throw new UnsupportedOperationException("getRuntimeMXBean() method returned null");
+                }
+                uptimeMethod = runtimeClass.getMethod("getUptime",noparams);
+                if (mxBean == null)
+                {
+                    throw new UnsupportedOperationException("method getUptime() not found");
+                }
+            }
+            catch (ClassNotFoundException | NoSuchMethodException | SecurityException | IllegalAccessException | IllegalArgumentException
+                    | InvocationTargetException e)
+            {
+                throw new UnsupportedOperationException("Implementation not available",e);
+            }
+        }
+
+        @Override
+        public long getUptime()
+        {
+            try
+            {
+                return (long)uptimeMethod.invoke(mxBean);
+            }
+            catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e)
+            {
+                return NOIMPL;
+            }
+        }
+    }
+
+    private static final Uptime INSTANCE = new Uptime();
+
+    public static Uptime getInstance()
+    {
+        return INSTANCE;
+    }
+
+    private Impl impl;
+
+    private Uptime()
+    {
+        try
+        {
+            impl = new DefaultImpl();
+        }
+        catch (UnsupportedOperationException e)
+        {
+            System.err.printf("Defaulting Uptime to NOIMPL due to (%s) %s%n",e.getClass().getName(),e.getMessage());
+            impl = null;
+        }
+    }
+
+    public Impl getImpl()
+    {
+        return impl;
+    }
+
+    public void setImpl(Impl impl)
+    {
+        this.impl = impl;
+    }
+
+    public static long getUptime()
+    {
+        Uptime u = getInstance();
+        if (u == null || u.impl == null)
+        {
+            return NOIMPL;
+        }
+        return u.impl.getUptime();
+    }
+}

jetty-util/src/main/java/org/eclipse/jetty/util/component/AbstractLifeCycle.java

@@ -18,9 +18,9 @@
 
 package org.eclipse.jetty.util.component;
 
-import java.lang.management.ManagementFactory;
 import java.util.concurrent.CopyOnWriteArrayList;
 
+import org.eclipse.jetty.util.Uptime;
 import org.eclipse.jetty.util.annotation.ManagedAttribute;
 import org.eclipse.jetty.util.annotation.ManagedObject;
 import org.eclipse.jetty.util.log.Log;
@@ -174,7 +174,7 @@ public abstract class AbstractLifeCycle implements LifeCycle
     {
         _state = __STARTED;
         if (LOG.isDebugEnabled())
-            LOG.debug(STARTED+" @{}ms {}",ManagementFactory.getRuntimeMXBean().getUptime(),this);
+            LOG.debug(STARTED+" @{}ms {}",Uptime.getUptime(),this);
         for (Listener listener : _listeners)
             listener.lifeCycleStarted(this);
     }

jetty-util/src/main/java/org/eclipse/jetty/util/log/Log.java

@@ -20,7 +20,6 @@ package org.eclipse.jetty.util.log;
 
 import java.io.IOException;
 import java.io.InputStream;
-import java.lang.management.ManagementFactory;
 import java.lang.reflect.Method;
 import java.net.URL;
 import java.security.AccessController;
@@ -34,6 +33,7 @@ import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentMap;
 
 import org.eclipse.jetty.util.Loader;
+import org.eclipse.jetty.util.Uptime;
 import org.eclipse.jetty.util.annotation.ManagedAttribute;
 
 /**
@@ -167,8 +167,6 @@ public class Log
                 return;
             __initialized = true;
 
-            final long uptime=ManagementFactory.getRuntimeMXBean().getUptime();
-
             try
             {
                 Class<?> log_class = Loader.loadClass(Log.class, __logClass);
@@ -185,7 +183,7 @@ public class Log
             }
 
             if (LOG!=null)
-                LOG.info(String.format("Logging initialized @%dms",uptime));
+                LOG.info(String.format("Logging initialized @%dms",Uptime.getUptime()));
         }
     }
 

jetty-util/src/test/java/org/eclipse/jetty/util/UptimeTest.java

@@ -0,0 +1,31 @@
+//
+//  ========================================================================
+//  Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
+//  ------------------------------------------------------------------------
+//  All rights reserved. This program and the accompanying materials
+//  are made available under the terms of the Eclipse Public License v1.0
+//  and Apache License v2.0 which accompanies this distribution.
+//
+//      The Eclipse Public License is available at
+//      http://www.eclipse.org/legal/epl-v10.html
+//
+//      The Apache License v2.0 is available at
+//      http://www.opensource.org/licenses/apache2.0.php
+//
+//  You may elect to redistribute this code under either of these licenses.
+//  ========================================================================
+//
+
+package org.eclipse.jetty.util;
+
+import org.junit.Test;
+
+public class UptimeTest
+{
+    @Test
+    public void testUptime()
+    {
+        // should not throw an exception (if it does, the exception flows out and fails the testcase)
+        System.err.printf("Uptime = %,d%n",Uptime.getUptime());
+    }
+}