Mercurial > hg > release > thermostat-0.13
changeset 204:832c61ca1f96
Add tool to check name of running process from pid
Reviewed-by: rkennke, vanaltj, omajid
Review-thread: http://icedtea.classpath.org/pipermail/thermostat/2012-April/000691.html
author | Mario Torre <neugens.limasoftware@gmail.com> |
---|---|
date | Wed, 04 Apr 2012 22:11:03 +0200 |
parents | 585a09251bf6 |
children | 38c8665824e5 |
files | common/src/main/java/com/redhat/thermostat/tools/unix/UnixProcessUtilities.java common/src/test/java/com/redhat/thermostat/tools/unix/UnixProcessUtilitiesTest.java |
diffstat | 2 files changed, 212 insertions(+), 0 deletions(-) [+] |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/common/src/main/java/com/redhat/thermostat/tools/unix/UnixProcessUtilities.java Wed Apr 04 22:11:03 2012 +0200 @@ -0,0 +1,102 @@ +/* + * Copyright 2012 Red Hat, Inc. + * + * This file is part of Thermostat. + * + * Thermostat is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published + * by the Free Software Foundation; either version 2, or (at your + * option) any later version. + * + * Thermostat 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 for more details. + * + * You should have received a copy of the GNU General Public License + * along with Thermostat; see the file COPYING. If not see + * <http://www.gnu.org/licenses/>. + * + * Linking this code with other modules is making a combined work + * based on this code. Thus, the terms and conditions of the GNU + * General Public License cover the whole combination. + * + * As a special exception, the copyright holders of this code give + * you permission to link this code with independent modules to + * produce an executable, regardless of the license terms of these + * independent modules, and to copy and distribute the resulting + * executable under terms of your choice, provided that you also + * meet, for each linked independent module, the terms and conditions + * of the license of that module. An independent module is a module + * which is not derived from or based on this code. If you modify + * this code, you may extend this exception to your version of the + * library, but you are not obligated to do so. If you do not wish + * to do so, delete this exception statement from your version. + */ + +package com.redhat.thermostat.tools.unix; + +import java.io.BufferedReader; +import java.io.IOException; +import java.io.InputStream; +import java.io.InputStreamReader; +import java.util.ArrayList; +import java.util.List; +import java.util.logging.Level; +import java.util.logging.Logger; + +import com.redhat.thermostat.common.utils.LoggedExternalProcess; +import com.redhat.thermostat.common.utils.LoggingUtils; + +public class UnixProcessUtilities { + + private static final Logger logger = LoggingUtils.getLogger(UnixProcessUtilities.class); + + private static final UnixProcessUtilities instance = new UnixProcessUtilities(); + public static UnixProcessUtilities getInstance() { + return instance; + } + + UnixProcessUtilities() {} + + /** + * Returns the process name of the process with the given pid, or null + * if no process is running with the given pid. + */ + public String getProcessName(String pid) { + + String result = null; + + List<String> commandLine = new ArrayList<>(); + commandLine.add("ps"); + commandLine.add("--no-heading"); + commandLine.add("-p"); + commandLine.add(pid); + + try { + Process process = createAndRunProcess(commandLine); + BufferedReader reader = getProcessOutput(process); + result = reader.readLine(); + if (result != null) { + String [] output = result.split(" "); + result = output[output.length - 1]; + } + + } catch (IOException e) { + logger.log(Level.WARNING, "can't run ps!", e); + } + + return result; + } + + public BufferedReader getProcessOutput(Process process) { + InputStream in = process.getInputStream(); + InputStreamReader isr = new InputStreamReader(in); + return new BufferedReader(isr); + } + + public Process createAndRunProcess(List<String> args) throws IOException { + LoggedExternalProcess process = new LoggedExternalProcess(args); + return process.runAndReturnProcess(); + } +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/common/src/test/java/com/redhat/thermostat/tools/unix/UnixProcessUtilitiesTest.java Wed Apr 04 22:11:03 2012 +0200 @@ -0,0 +1,110 @@ +/* + * Copyright 2012 Red Hat, Inc. + * + * This file is part of Thermostat. + * + * Thermostat is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published + * by the Free Software Foundation; either version 2, or (at your + * option) any later version. + * + * Thermostat 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 for more details. + * + * You should have received a copy of the GNU General Public License + * along with Thermostat; see the file COPYING. If not see + * <http://www.gnu.org/licenses/>. + * + * Linking this code with other modules is making a combined work + * based on this code. Thus, the terms and conditions of the GNU + * General Public License cover the whole combination. + * + * As a special exception, the copyright holders of this code give + * you permission to link this code with independent modules to + * produce an executable, regardless of the license terms of these + * independent modules, and to copy and distribute the resulting + * executable under terms of your choice, provided that you also + * meet, for each linked independent module, the terms and conditions + * of the license of that module. An independent module is a module + * which is not derived from or based on this code. If you modify + * this code, you may extend this exception to your version of the + * library, but you are not obligated to do so. If you do not wish + * to do so, delete this exception statement from your version. + */ + +package com.redhat.thermostat.tools.unix; + + +import java.io.BufferedReader; +import java.io.IOException; +import java.io.StringReader; +import java.util.ArrayList; +import java.util.List; + +import junit.framework.Assert; + +import org.junit.Before; +import org.junit.Test; + +public class UnixProcessUtilitiesTest { + + private BufferedReader reader; + private BufferedReader emptyReader; + + @Before + public void setUp() { + + String data = "123 fluff"; + reader = new BufferedReader(new StringReader(data)); + emptyReader = new BufferedReader(new StringReader("")); + } + + @Test + public void getProcessName() { + + final List<String> processArguments = new ArrayList<>(); + UnixProcessUtilities process = new UnixProcessUtilities() { + @Override + public Process createAndRunProcess(List<String> args) + throws IOException { + processArguments.addAll(args); + return null; + } + + public java.io.BufferedReader getProcessOutput(Process process) { + return reader; + }; + }; + + String result = process.getProcessName("12345"); + Assert.assertEquals("fluff", result); + Assert.assertTrue(processArguments.contains("12345")); + + Assert.assertTrue(processArguments.contains("ps")); + Assert.assertTrue(processArguments.contains("--no-heading")); + Assert.assertTrue(processArguments.contains("-p")); + } + + @Test + public void getProcessNameNoOutput() { + + final List<String> processArguments = new ArrayList<>(); + UnixProcessUtilities process = new UnixProcessUtilities() { + @Override + public Process createAndRunProcess(List<String> args) + throws IOException { + processArguments.addAll(args); + return null; + } + + public java.io.BufferedReader getProcessOutput(Process process) { + return emptyReader; + }; + }; + + String result = process.getProcessName("12345"); + Assert.assertNull(result); + } +}