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*
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* 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).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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/*
* @test
* @bug 6314913
* @summary Basic Test for HotSpotDiagnosticMXBean.setVMOption()
* and getDiagnosticOptions().
* @author Mandy Chung
*
* @run main/othervm -XX:+PrintGCDetails SetVMOption
*/
import java.util.*;
import com.sun.management.HotSpotDiagnosticMXBean;
import com.sun.management.VMOption;
import com.sun.management.VMOption.Origin;
import sun.management.ManagementFactory;
import sun.misc.Version;
public class SetVMOption {
private static String PRINT_GC_DETAILS = "PrintGCDetails";
private static String EXPECTED_VALUE = "true";
private static String BAD_VALUE = "yes";
private static String NEW_VALUE = "false";
private static String MANAGEMENT_SERVER = "ManagementServer";
private static HotSpotDiagnosticMXBean mbean =
ManagementFactory.getDiagnosticMXBean();
public static void main(String[] args) throws Exception {
// The following test is transitional only and should be removed
// once build 52 is promoted.
int build = Version.jvmBuildNumber();
if (build > 0 && build < 52) {
// JVM support is integrated in build 52
// this test is skipped if running with VM earlier than 52
return;
}
VMOption option = findPrintGCDetailsOption();
if (!option.getValue().equalsIgnoreCase(EXPECTED_VALUE)) {
throw new RuntimeException("Unexpected value: " +
option.getValue() + " expected: " + EXPECTED_VALUE);
}
if (option.getOrigin() != Origin.VM_CREATION) {
throw new RuntimeException("Unexpected origin: " +
option.getOrigin() + " expected: VM_CREATION");
}
if (!option.isWriteable()) {
throw new RuntimeException("Expected " + PRINT_GC_DETAILS +
" to be writeable");
}
// set VM option to a new value
mbean.setVMOption(PRINT_GC_DETAILS, NEW_VALUE);
option = findPrintGCDetailsOption();
if (!option.getValue().equalsIgnoreCase(NEW_VALUE)) {
throw new RuntimeException("Unexpected value: " +
option.getValue() + " expected: " + NEW_VALUE);
}
if (option.getOrigin() != Origin.MANAGEMENT) {
throw new RuntimeException("Unexpected origin: " +
option.getOrigin() + " expected: MANAGEMENT");
}
VMOption o = mbean.getVMOption(PRINT_GC_DETAILS);
if (!option.getValue().equals(o.getValue())) {
throw new RuntimeException("Unmatched value: " +
option.getValue() + " expected: " + o.getValue());
}
if (!option.getValue().equals(o.getValue())) {
throw new RuntimeException("Unmatched value: " +
option.getValue() + " expected: " + o.getValue());
}
if (option.getOrigin() != o.getOrigin()) {
throw new RuntimeException("Unmatched origin: " +
option.getOrigin() + " expected: " + o.getOrigin());
}
if (option.isWriteable() != o.isWriteable()) {
throw new RuntimeException("Unmatched writeable: " +
option.isWriteable() + " expected: " + o.isWriteable());
}
// check if ManagementServer is not writeable
List<VMOption> options = mbean.getDiagnosticOptions();
VMOption mgmtServerOption = null;
for (VMOption o1 : options) {
if (o1.getName().equals(MANAGEMENT_SERVER)) {
mgmtServerOption = o1;
break;
}
}
if (mgmtServerOption != null) {
throw new RuntimeException(MANAGEMENT_SERVER +
" is not expected to be writeable");
}
mgmtServerOption = mbean.getVMOption(MANAGEMENT_SERVER);
if (mgmtServerOption == null) {
throw new RuntimeException(MANAGEMENT_SERVER +
" should exist.");
}
if (mgmtServerOption.getOrigin() != Origin.DEFAULT) {
throw new RuntimeException(MANAGEMENT_SERVER +
" should have the default value.");
}
if (mgmtServerOption.isWriteable()) {
throw new RuntimeException(MANAGEMENT_SERVER +
" is not expected to be writeable");
}
}
public static VMOption findPrintGCDetailsOption() {
List<VMOption> options = mbean.getDiagnosticOptions();
VMOption gcDetails = null;
for (VMOption o : options) {
if (o.getName().equals(PRINT_GC_DETAILS)) {
gcDetails = o;
break;
}
}
if (gcDetails == null) {
throw new RuntimeException("VM option " + PRINT_GC_DETAILS +
" not found");
}
return gcDetails;
}
}