/*
* Copyright (c) 2007, 2011, 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
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package org.eclipse.visualvm.launcher.api;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.StringTokenizer;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.visualvm.launcher.Activator;
import org.eclipse.visualvm.launcher.preferences.PreferenceConstants;
public final class VisualVMHelper {
private static class SpecVersion {
int major, minor;
public SpecVersion(String specString) {
StringTokenizer st = new StringTokenizer(specString, ".");
if (st.hasMoreTokens()) {
major = Integer.parseInt(st.nextToken());
}
if (st.hasMoreTokens()) {
minor = Integer.parseInt(st.nextToken());
}
}
}
public static long getNextID() {
return System.nanoTime();
}
public static String[] getJvmArgs(long id) {
return new String[]{"-Dvisualvm.id=" + id};
}
public static void openInVisualVM(long id) throws IOException {
SpecVersion sv = getJavaVersion();
if (sv == null || (sv.major == 1 && sv.minor < 6)) {
try {
final Display d = Display.getDefault();
d.asyncExec(new Runnable() {
public void run() {
Shell s = new Shell(d);
MessageDialog.openError(s, "VisualVM requires JDK1.6+ to run", "You are trying to launch VisualVM using an unsupported JDK.\n\nUse 'Window\\Preferences\\Run/Debug\\Launching\\VisualVM Configuration' to set the VisualVM JDK_HOME.");
}
});
} catch (Exception e) {
e.printStackTrace();
}
return;
}
Runtime.getRuntime().exec(
new String[] {
Activator.getDefault().getPreferenceStore().getString(PreferenceConstants.P_PATH),
"--jdkhome",
Activator.getDefault().getPreferenceStore().getString(PreferenceConstants.P_JAVAHOME),
"--openid",
String.valueOf(id)
});
}
private static SpecVersion getJavaVersion() {
try {
String javaCmd = Activator.getDefault().getPreferenceStore().getString(PreferenceConstants.P_JAVAHOME) + File.separator + "bin" + File.separator + "java";
Process prc = Runtime.getRuntime().exec(
new String[] {
javaCmd,
"-version"
}
);
String version = getJavaVersion(prc.getErrorStream());
if (version == null) {
version = getJavaVersion(prc.getInputStream());
}
return new SpecVersion(version);
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
private static String getJavaVersion(InputStream is) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(is));
try {
String line;
while ((line = br.readLine()) != null) {
if (line.startsWith("java version")) {
int start = line.indexOf("\"");
int end = line.lastIndexOf("\"");
if (start > -1 && end > -1) {
return line.substring(start + 1, end);
}
}
}
} finally {
br.close();
}
return null;
}
}