org.apache.maven.surefire.booter

Class SystemUtils

java.lang.Object

org.apache.maven.surefire.booter.SystemUtils

public final class SystemUtils
extends java.lang.Object

JDK 9 support.

Since:

2.20.1

Field Summary

Fields

Modifier and Type	Field and Description
private static double	JIGSAW_JAVA_VERSION
private static int	PROC_STATUS_PID_FIRST_CHARS

Constructor Summary

Constructors

Modifier	Constructor and Description
private	SystemUtils()

Method Summary

Modifier and Type	Method and Description
static boolean	endsWithJavaPath(java.lang.String jvmExecPath)
(package private) static boolean	isBuiltInJava9AtLeast()
static boolean	isJava9AtLeast(java.lang.Double version)
static boolean	isJava9AtLeast(java.lang.String jvmExecutablePath)
static java.lang.Long	pid()
(package private) static java.lang.Long	pidOnJava9()
(package private) static java.lang.Long	pidOnJMX()
(package private) static java.lang.Long	pidStatusOnBSD() The process status.
(package private) static java.lang.Long	pidStatusOnLinux()
static java.lang.ClassLoader	platformClassLoader()
(package private) static java.lang.ClassLoader	reflectClassLoader(java.lang.Class<?> target, java.lang.String getterMethodName)
static java.io.File	toJdkHomeFromJre() If system property java.home is /jdk (since jdk9) or /jdk/jre (prior to jdk9) then the absolute path to JDK home is returned /jdk.
(package private) static java.io.File	toJdkHomeFromJre(java.lang.String jreHome) If jreHome is /jdk (since jdk9) or /jdk/jre (prior to jdk9) then the absolute path to JDK home is returned /jdk.
static java.io.File	toJdkHomeFromJvmExec(java.lang.String jvmExecutable) If jvmExecutable is /jdk/bin/java (since jdk9) or /jdk/jre/bin/java (prior to jdk9) then the absolute path to JDK home is returned /jdk.
static java.lang.Double	toJdkVersionFromReleaseFile(java.io.File jdkHome)

Methods inherited from class java.lang.Object

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

Field Detail

JIGSAW_JAVA_VERSION

private static final double JIGSAW_JAVA_VERSION

See Also:

Constant Field Values

PROC_STATUS_PID_FIRST_CHARS

private static final int PROC_STATUS_PID_FIRST_CHARS

See Also:

Constant Field Values

Constructor Detail

SystemUtils

private SystemUtils()

Method Detail

endsWithJavaPath

public static boolean endsWithJavaPath(java.lang.String jvmExecPath)

Parameters:

jvmExecPath - e.g. /jdk/bin/java, /jdk/jre/bin/java

Returns:

true if jvmExecPath is path to java binary executor

toJdkHomeFromJvmExec

public static java.io.File toJdkHomeFromJvmExec(java.lang.String jvmExecutable)

If jvmExecutable is /jdk/bin/java (since jdk9) or /jdk/jre/bin/java (prior to jdk9) then the absolute path to JDK home is returned /jdk.
Null is returned if jvmExecutable is incorrect.

Parameters:

jvmExecutable - /jdk/bin/java* or /jdk/jre/bin/java*

Returns:

path to jdk directory; or null if wrong path or directory layout of JDK installation.

toJdkHomeFromJre

public static java.io.File toJdkHomeFromJre()

If system property java.home is /jdk (since jdk9) or /jdk/jre (prior to jdk9) then the absolute path to JDK home is returned /jdk.

Returns:

path to JDK

toJdkHomeFromJre

static java.io.File toJdkHomeFromJre(java.lang.String jreHome)

If jreHome is /jdk (since jdk9) or /jdk/jre (prior to jdk9) then the absolute path to JDK home is returned /jdk.
JRE home directory jreHome must be taken from system property java.home.

Parameters:

jreHome - path to /jdk or /jdk/jre

Returns:

path to JDK

toJdkVersionFromReleaseFile

public static java.lang.Double toJdkVersionFromReleaseFile(java.io.File jdkHome)

isJava9AtLeast

public static boolean isJava9AtLeast(java.lang.String jvmExecutablePath)

isBuiltInJava9AtLeast

static boolean isBuiltInJava9AtLeast()

isJava9AtLeast

public static boolean isJava9AtLeast(java.lang.Double version)

platformClassLoader

public static java.lang.ClassLoader platformClassLoader()

pid

public static java.lang.Long pid()

pidOnJMX

static java.lang.Long pidOnJMX()

pidStatusOnLinux

static java.lang.Long pidStatusOnLinux()
                                throws java.lang.Exception

Throws:

java.lang.Exception

pidStatusOnBSD

static java.lang.Long pidStatusOnBSD()
                              throws java.lang.Exception

The process status. This file is read-only and returns a single line containing multiple space-separated fields. See procfs status

Returns:

current PID

Throws:

java.lang.Exception - if could not read /proc/curproc/status

pidOnJava9

static java.lang.Long pidOnJava9()

reflectClassLoader

static java.lang.ClassLoader reflectClassLoader(java.lang.Class<?> target,
                                                java.lang.String getterMethodName)