/*
* Copyright (c) 2005, 2006, 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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 sun.management;
import java.util.*;
import java.io.IOException;
import java.lang.reflect.Method;
import com.sun.management.HotSpotDiagnosticMXBean;
import com.sun.management.VMOption;
/**
* Implementation of the diagnostic MBean for Hotspot VM.
*/
public class HotSpotDiagnostic implements HotSpotDiagnosticMXBean {
public HotSpotDiagnostic() {
}
public native void dumpHeap(String outputFile, boolean live) throws IOException;
public List<VMOption> getDiagnosticOptions() {
List<Flag> allFlags = Flag.getAllFlags();
List<VMOption> result = new ArrayList<VMOption>();
for (Flag flag : allFlags) {
if (flag.isWriteable() && flag.isExternal()) {
result.add(flag.getVMOption());
}
}
return result;
}
public VMOption getVMOption(String name) {
if (name == null) {
throw new NullPointerException("name cannot be null");
}
Flag f = Flag.getFlag(name);
if (f == null) {
throw new IllegalArgumentException("VM option \"" +
name + "\" does not exist");
}
return f.getVMOption();
}
public void setVMOption(String name, String value) {
if (name == null) {
throw new NullPointerException("name cannot be null");
}
if (value == null) {
throw new NullPointerException("value cannot be null");
}
ManagementFactory.checkControlAccess();
Flag flag = Flag.getFlag(name);
if (flag == null) {
throw new IllegalArgumentException("VM option \"" +
name + "\" does not exist");
}
if (!flag.isWriteable()){
throw new IllegalArgumentException("VM Option \"" +
name + "\" is not writeable");
}
// Check the type of the value
Object v = flag.getValue();
if (v instanceof Long) {
try {
long l = Long.parseLong(value);
Flag.setLongValue(name, l);
} catch (NumberFormatException e) {
IllegalArgumentException iae =
new IllegalArgumentException("Invalid value:" +
" VM Option \"" + name + "\"" +
" expects numeric value");
iae.initCause(e);
throw iae;
}
} else if (v instanceof Boolean) {
if (!value.equalsIgnoreCase("true") &&
!value.equalsIgnoreCase("false")) {
throw new IllegalArgumentException("Invalid value:" +
" VM Option \"" + name + "\"" +
" expects \"true\" or \"false\".");
}
Flag.setBooleanValue(name, Boolean.parseBoolean(value));
} else if (v instanceof String) {
Flag.setStringValue(name, value);
} else {
throw new IllegalArgumentException("VM Option \"" +
name + "\" is of an unsupported type: " +
v.getClass().getName());
}
}
}