org.mule.util.SystemUtils Maven / Gradle / Ivy
/*
* $Id: SystemUtils.java 19191 2010-08-25 21:05:23Z tcarlson $
* --------------------------------------------------------------------------------------
* Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com
*
* The software in this package is published under the terms of the CPAL v1.0
* license, a copy of which has been included with this distribution in the
* LICENSE.txt file.
*/
package org.mule.util;
import org.mule.api.DefaultMuleException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.lang.reflect.Method;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.cli.BasicParser;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
// @ThreadSafe
public class SystemUtils extends org.apache.commons.lang.SystemUtils
{
// class logger
protected static final Log logger = LogFactory.getLog(SystemUtils.class);
// bash prepends: declare -x
// zsh prepends: typeset -x
private static final String[] UNIX_ENV_PREFIXES = new String[]{"declare -", "typeset -"};
// the environment of the VM process
private static Map environment = null;
/**
* Get the operating system environment variables. This should work for Windows
* and Linux.
*
* @return Map or an empty map if there was an error.
*/
public static synchronized Map getenv()
{
if (environment == null)
{
try
{
if (SystemUtils.IS_JAVA_1_4)
{
// fallback to external process
environment = Collections.unmodifiableMap(getenvJDK14());
}
else
{
// the following runaround is necessary since we still want to
// compile on JDK 1.4
Class target = System.class;
Method envMethod = target.getMethod("getenv", ArrayUtils.EMPTY_CLASS_ARRAY);
environment = Collections.unmodifiableMap((Map) envMethod.invoke(target, (Object[]) null));
}
}
catch (Exception ex)
{
logger.error("Could not access OS environment: ", ex);
environment = Collections.EMPTY_MAP;
}
}
return environment;
}
private static Map getenvJDK14() throws Exception
{
Map env = new HashMap();
Process process = null;
try
{
boolean isUnix = true;
String command;
if (SystemUtils.IS_OS_WINDOWS)
{
command = "cmd /c set";
isUnix = false;
}
else
{
command = "env";
}
process = Runtime.getRuntime().exec(command);
BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream()));
String line;
while ((line = br.readLine()) != null)
{
for (int prefix = 0; prefix < UNIX_ENV_PREFIXES.length; prefix++)
{
if (line.startsWith(UNIX_ENV_PREFIXES[prefix]))
{
line = line.substring(UNIX_ENV_PREFIXES[prefix].length());
}
}
int index = -1;
if ((index = line.indexOf('=')) > -1)
{
String key = line.substring(0, index).trim();
String value = line.substring(index + 1).trim();
// remove quotes, if any
if (isUnix && value.length() > 1 && (value.startsWith("\"") || value.startsWith("'")))
{
value = value.substring(1, value.length() - 1);
}
env.put(key, value);
}
else
{
env.put(line, StringUtils.EMPTY);
}
}
}
catch (Exception e)
{
throw e; // bubble up
}
finally
{
if (process != null)
{
process.destroy();
}
}
return env;
}
public static String getenv(String name)
{
return (String) SystemUtils.getenv().get(name);
}
public static boolean isSunJDK()
{
return SystemUtils.JAVA_VM_VENDOR.toUpperCase().indexOf("SUN") != -1;
}
public static boolean isAppleJDK()
{
return SystemUtils.JAVA_VM_VENDOR.toUpperCase().indexOf("APPLE") != -1;
}
public static boolean isIbmJDK()
{
return SystemUtils.JAVA_VM_VENDOR.toUpperCase().indexOf("IBM") != -1;
}
// TODO MULE-1947 Command-line arguments should be handled exclusively by the bootloader
private static CommandLine parseCommandLine(String args[], String opts[][]) throws DefaultMuleException
{
Options options = new Options();
for (int i = 0; i < opts.length; i++)
{
options.addOption(opts[i][0], opts[i][1].equals("true") ? true : false, opts[i][2]);
}
BasicParser parser = new BasicParser();
try
{
CommandLine line = parser.parse(options, args, true);
if (line == null)
{
throw new DefaultMuleException("Unknown error parsing the Mule command line");
}
return line;
}
catch (ParseException p)
{
throw new DefaultMuleException("Unable to parse the Mule command line because of: " + p.toString(), p);
}
}
/**
* Returns the value corresponding to the given option from the command line, for
* example if the options are "-config mule-config.xml"
* getCommandLineOption("config") would return "mule-config.xml"
*/
// TODO MULE-1947 Command-line arguments should be handled exclusively by the bootloader
public static String getCommandLineOption(String option, String args[], String opts[][])
throws DefaultMuleException
{
CommandLine line = parseCommandLine(args, opts);
return line.getOptionValue(option);
}
/**
* Checks whether a command line option is set. This is useful for command line
* options that don't have an argument, like "-cluster", which means that this
* Mule instance is part of a cluster.
*/
// TODO MULE-1947 Command-line arguments should be handled exclusively by the bootloader
public static boolean hasCommandLineOption(String option, String args[], String opts[][])
throws DefaultMuleException
{
CommandLine line = parseCommandLine(args, opts);
return line.hasOption(option);
}
/**
* Returns a Map of all options in the command line. The Map is keyed off the
* option name. The value will be whatever is present on the command line.
* Options that don't have an argument will have the String "true".
*/
// TODO MULE-1947 Command-line arguments should be handled exclusively by the bootloader
public static Map getCommandLineOptions(String args[], String opts[][]) throws DefaultMuleException
{
CommandLine line = parseCommandLine(args, opts);
Map ret = new HashMap();
Option[] options = line.getOptions();
for (int i = 0; i < options.length; i++)
{
Option option = options[i];
ret.put(option.getOpt(), option.getValue("true"));
}
return ret;
}
/**
* Returns a Map of all valid property definitions in -Dkey=value
* format. -Dkey is interpreted as -Dkey=true,
* everything else is ignored. Whitespace in values is properly handled but needs
* to be quoted properly: -Dkey="some value".
*
* @param input String with property definitionn
* @return a {@link Map} of property String keys with their defined values
* (Strings). If no valid key-value pairs can be parsed, the map is
* empty.
*/
public static Map parsePropertyDefinitions(String input)
{
if (StringUtils.isEmpty(input))
{
return Collections.emptyMap();
}
// the result map of property key/value pairs
final Map result = new HashMap();
// where to begin looking for key/value tokens
int tokenStart = 0;
// this is the main loop that scans for all tokens
findtoken:
while (tokenStart < input.length())
{
// find first definition or bail
tokenStart = StringUtils.indexOf(input, "-D", tokenStart);
if (tokenStart == StringUtils.INDEX_NOT_FOUND)
{
break findtoken;
}
else
{
// skip leading -D
tokenStart += 2;
}
// find key
int keyStart = tokenStart;
int keyEnd = keyStart;
if (keyStart == input.length())
{
// short input: '-D' only
break;
}
// let's check out what we have next
char cursor = input.charAt(keyStart);
// '-D xxx'
if (cursor == ' ')
{
continue findtoken;
}
// '-D='
if (cursor == '=')
{
// skip over garbage to next potential definition
tokenStart = StringUtils.indexOf(input, ' ', tokenStart);
if (tokenStart != StringUtils.INDEX_NOT_FOUND)
{
// '-D= ..' - continue with next token
continue findtoken;
}
else
{
// '-D=' - get out of here
break findtoken;
}
}
// apparently there's a key, so find the end
findkey:
while (keyEnd < input.length())
{
cursor = input.charAt(keyEnd);
// '-Dkey ..'
if (cursor == ' ')
{
tokenStart = keyEnd;
break findkey;
}
// '-Dkey=..'
if (cursor == '=')
{
break findkey;
}
// keep looking
keyEnd++;
}
// yay, finally a key
String key = StringUtils.substring(input, keyStart, keyEnd);
// assume that there is no value following
int valueStart = keyEnd;
int valueEnd = keyEnd;
// default value
String value = "true";
// now find the value, but only if the current cursor is not a space
if (keyEnd < input.length() && cursor != ' ')
{
// bump value start/end
valueStart = keyEnd + 1;
valueEnd = valueStart;
// '-Dkey="..'
cursor = input.charAt(valueStart);
if (cursor == '"')
{
// opening "
valueEnd = StringUtils.indexOf(input, '"', ++valueStart);
}
else
{
// unquoted value
valueEnd = StringUtils.indexOf(input, ' ', valueStart);
}
// no '"' or ' ' delimiter found - use the rest of the string
if (valueEnd == StringUtils.INDEX_NOT_FOUND)
{
valueEnd = input.length();
}
// create value
value = StringUtils.substring(input, valueStart, valueEnd);
}
// finally create key and value && loop again for next token
result.put(key, value);
// start next search at end of value
tokenStart = valueEnd;
}
return result;
}
}
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