com.atlassian.bamboo.utils
Class JavaVirtualMachineDetector

java.lang.Object
  com.atlassian.bamboo.utils.JavaVirtualMachineDetector

public class JavaVirtualMachineDetector
extends Object

Based on comment from Vincent Massol on the forums: http://www.pols.co.uk/forums/viewtopic.php?id=26

Constructor Summary

JavaVirtualMachineDetector(boolean isRunningOnOsx)

Method Summary

boolean	containsJavac(File givenDirectory)
String	detectExternalJdkVersion(File givenDirectory)
String	detectJavaHome(String systemJavaHome) Used to detects if the default JAVA_HOME is running on a JRE and not a JDK (so that the tools.jar is missing and build's cannot compile).

Methods inherited from class java.lang.Object

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

Constructor Detail

JavaVirtualMachineDetector

public JavaVirtualMachineDetector(boolean isRunningOnOsx)

Method Detail

detectJavaHome

public String detectJavaHome(String systemJavaHome)

Used to detects if the default JAVA_HOME is running on a JRE and not a JDK (so that the tools.jar is missing and build's cannot compile).

The strategy is:

• If running on OSX, return the JAVA_HOME as no need for tools.jar on the mac
• First loot to see if we can find the tools.jar in ${java.home}/lib/tools.jar. If found then you've got your dir.
• Otherwise look for tools.jar in ${java.home}/../lib/tools.jar. if found then you've got your dir.

If not, return false, user has installed a JRA and not a JDK

Parameters:

systemJavaHome - What the system thinks the JAVA_HOME is - may be a JRE or a JVM!

Returns:

The JAVA_HOME adjusted to ensure we're running on JDK and not the JDK's JRE!

Throws:

IllegalStateException - if we are running only on a JRE as we not be able to build any builds by default!

containsJavac

public boolean containsJavac(File givenDirectory)

detectExternalJdkVersion

@Nullable
public String detectExternalJdkVersion(File givenDirectory)