/* * Copyright (c) 2013, 2020, 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. * * 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.
*/
/** * A utility for constructing command lines for starting JDK tool processes. * * The JDKToolLauncher can in particular be combined with a * java.lang.ProcessBuilder to easily run a JDK tool. For example, the following * code run {@code jmap -heap} against a process with GC logging turned on for * the {@code jmap} process: * * <pre> * {@code * JDKToolLauncher jmap = JDKToolLauncher.create("jmap") * .addVMArg("-XX:+PrintGC"); * .addVMArg("-XX:+PrintGCDetails") * .addToolArg("-heap") * .addToolArg(pid); * ProcessBuilder pb = new ProcessBuilder(jmap.getCommand()); * Process p = pb.start(); * } * </pre>
*/ publicclass JDKToolLauncher { privatefinal String executable; privatefinal List<String> vmArgs = new ArrayList<String>(); privatefinal List<String> toolArgs = new ArrayList<String>();
/** * Creates a new JDKToolLauncher for the specified tool. Using tools path * from the compiler JDK. * * @param tool * The name of the tool * @return A new JDKToolLauncher
*/ publicstatic JDKToolLauncher create(String tool) { returnnew JDKToolLauncher(tool, true);
}
/** * Creates a new JDKToolLauncher for the specified tool in the Tested JDK. * * @param tool * The name of the tool * * @return A new JDKToolLauncher
*/ publicstatic JDKToolLauncher createUsingTestJDK(String tool) { returnnew JDKToolLauncher(tool, false);
}
/** * Adds an argument to the JVM running the tool. * * The JVM arguments are passed to the underlying JVM running the tool. * Arguments will automatically be prepended with "-J". * * Any platform specific arguments required for running the tool are * automatically added. * * * @param arg * The argument to VM running the tool * @return The JDKToolLauncher instance
*/ public JDKToolLauncher addVMArg(String arg) {
vmArgs.add(arg); returnthis;
}
/** * Adds arguments to the JVM running the tool. * * The JVM arguments are passed to the underlying JVM running the tool. * Arguments will automatically be prepended with "-J". * * Any platform specific arguments required for running the tool are * automatically added. * * @param args * The arguments to VM running the tool * @return The JDKToolLauncher instance
*/ public JDKToolLauncher addVMArgs(String[] args) {
Stream.of(args).forEach(vmArgs::add); returnthis;
}
/** * Adds an argument to the tool. * * @param arg * The argument to the tool * @return The JDKToolLauncher instance
*/ public JDKToolLauncher addToolArg(String arg) {
toolArgs.add(arg); returnthis;
}
/** * Returns the command that can be used for running the tool. * * @return An array whose elements are the arguments of the command.
*/ public String[] getCommand() {
List<String> command = new ArrayList<String>();
command.add(executable); // Add -J in front of all vmArgs for (String arg : vmArgs) {
command.add("-J" + arg);
}
command.addAll(toolArgs); return command.toArray(new String[command.size()]);
}
}
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