Package org.bootchart.common

Class Common

java.lang.Object

org.bootchart.common.Common

public class Common
extends Object

Common methods.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Common.LogFileFilter	File name filter for bootchart log files.

Field Summary

Fields

Modifier and Type	Field	Description
static final Locale	LOCALE	Default locale.
static final int	MAX_PARSE_SAMPLES	The maximum number of samples to parse.
static final List	PROC_PARAM	A list of processes which should include parameters in their command lines.
static final String	VERSION	Program version.

Constructor Summary

Constructors

Constructor	Description
Common()

Method Summary

Modifier and Type	Method	Description
static String	formatCommand(String cmd)	Format the specified command line.
static String	getProcessDesc(Process proc, Date startTime)	Returns the text to include in the process description pop-up.
static BufferedReader	getReader(InputStream is)	Returns a buffered reader suitable for reading the input stream.
static boolean	isPNGSupported()	Whether the running JVM supports PNG encoding.
static String	loadFile(File file)	Loads the contents of the file.
static double	parseDouble(String s)	Returns a new double initialized to the value represented by the specified String.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

VERSION

public static final String VERSION

Program version.

See Also:

• Constant Field Values

LOCALE

public static final Locale LOCALE

Default locale.

PROC_PARAM

public static final List PROC_PARAM

A list of processes which should include parameters in their command lines.

MAX_PARSE_SAMPLES

public static final int MAX_PARSE_SAMPLES

The maximum number of samples to parse.

See Also:

• Constant Field Values

Constructor Details

Common

public Common()

Method Details

loadFile

public static String loadFile(File file)
                       throws IOException

Loads the contents of the file. The file is either read from the file system or retrieved as resource stream.

Parameters:

file - the file to read

Returns:

file contents string

Throws:

IOException - if an I/O error occurs

getReader

public static BufferedReader getReader(InputStream is)
                                throws IOException

Returns a buffered reader suitable for reading the input stream.

Parameters:

is - input stream to read

Returns:

buffered reader

Throws:

IOException - if an I/O error occurs

parseDouble

public static double parseDouble(String s)

Returns a new double initialized to the value represented by the specified String. Any decimal commas in the string are replaced with dots.

Parameters:

s - the string to be parsed

Returns:

the double value represented by the string argument

formatCommand

public static String formatCommand(String cmd)

Format the specified command line. Shell invocations, paths and parameters are removed (e.g. "/bin/bash /etc/rc.d/rc.sysinit" -> "rc.sysinit"). Paramaters are included for certain commands (e.g. modprobe and rc).

Parameters:

cmd - command line

Returns:

a trimed command line

getProcessDesc

public static String getProcessDesc(Process proc,
 Date startTime)

Returns the text to include in the process description pop-up. The description includes the PID, command name, start time, duration and any user-specified description (e.g. script stack trace).

Parameters:

proc - the process to get description for

startTime - process tree start time

Returns:

a multiline process description text

isPNGSupported

public static boolean isPNGSupported()

Whether the running JVM supports PNG encoding. Some runtime environments (e.g. those based on GNU Classpath) don't have the necessary Graphics2D support.

Returns:

whether this JVM supports PNG encoding