test/testlibrary/com/oracle/java/testlibrary/DynamicVMOptionChecker.java

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  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package com.oracle.java.testlibrary;
  24 
  25 import com.sun.management.HotSpotDiagnosticMXBean;
  26 import com.sun.management.VMOption;
  27 import java.lang.management.ManagementFactory;
  28 
  29 /**
  30  * Simple class to check writeability, invalid and valid values for VMOption
  31  */
  32 public class DynamicVMOptionChecker {
  33 
  34     /**
  35      * Reads VM option from PlatformMXBean and parse it to integer value
  36      *
  37      * @param name of option
  38      * @return parsed value
  39      */
  40     public static int getIntValue(String name) {
  41 
  42         VMOption option = ManagementFactory.
  43                 getPlatformMXBean(HotSpotDiagnosticMXBean.class).
  44                 getVMOption(name);
  45 
  46         return Integer.parseInt(option.getValue());
  47     }
  48 
  49     /**
  50      * Sets VM option value




  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package com.oracle.java.testlibrary;
  24 
  25 import com.sun.management.HotSpotDiagnosticMXBean;
  26 import com.sun.management.VMOption;
  27 import java.lang.management.ManagementFactory;
  28 
  29 /**
  30  * Simple class to check writability, invalid and valid values for VMOption
  31  */
  32 public class DynamicVMOptionChecker {
  33  
  34     /**
  35      * Reads VM option from PlatformMXBean and parse it to integer value
  36      *
  37      * @param name of option
  38      * @return parsed value
  39      */
  40     public static int getIntValue(String name) {
  41 
  42         VMOption option = ManagementFactory.
  43                 getPlatformMXBean(HotSpotDiagnosticMXBean.class).
  44                 getVMOption(name);
  45 
  46         return Integer.parseInt(option.getValue());
  47     }
  48 
  49     /**
  50      * Sets VM option value