org.opennms.bootstrap
Class Bootstrap

java.lang.Object
  org.opennms.bootstrap.Bootstrap

Direct Known Subclasses:

SystemReport

public class Bootstrap
extends Object

Bootstrap application for starting OpenNMS.

Version:

$Id: $

Author:

ranger

Field Summary

protected static String	BOOT_PROPERTIES_NAME
protected static String	LIBRARY_PROPERTIES_NAME
protected static String	OPENNMS_HOME_PROPERTY
protected static String	RRD_PROPERTIES_NAME

Constructor Summary

Bootstrap()

Method Summary

protected static void	executeClass(String classToExec, String classToExecMethod, String[] classToExecArgs, boolean appendClasspath)
static File	findOpenNMSHome() Determine the OpenNMS home directory based on the location of the JAR file containing this code.
static ClassLoader	loadClasses(File dir, boolean recursive) Create a ClassLoader with the JARs found in dir.
static void	loadClasses(File dir, boolean recursive, LinkedList<URL> urls) Add JARs found in dir to the LinkedList urls.
static ClassLoader	loadClasses(String dirStr, boolean recursive, boolean append) Create a ClassLoader with the JARs found in dirStr.
protected static void	loadDefaultProperties()
protected static boolean	loadDefaultProperties(File opennmsHome) Load default properties from the specified OpenNMS home into the system properties.
protected static boolean	loadProperties(File f) Copy properties from a property file to the system properties.
protected static void	loadProperties(InputStream is) Copy properties from a property input stream to the system properties.
static void	main(String[] args) Bootloader main method.
static ClassLoader	newClassLoader(LinkedList<URL> urls) Create a ClassLoader with the list of URLs found in urls.

Methods inherited from class java.lang.Object

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

Field Detail

BOOT_PROPERTIES_NAME

protected static final String BOOT_PROPERTIES_NAME

See Also:

Constant Field Values

RRD_PROPERTIES_NAME

protected static final String RRD_PROPERTIES_NAME

See Also:

Constant Field Values

LIBRARY_PROPERTIES_NAME

protected static final String LIBRARY_PROPERTIES_NAME

See Also:

Constant Field Values

OPENNMS_HOME_PROPERTY

protected static final String OPENNMS_HOME_PROPERTY

See Also:

Constant Field Values

Constructor Detail

Bootstrap

public Bootstrap()

Method Detail

loadClasses

public static ClassLoader loadClasses(String dirStr,
                                      boolean recursive,
                                      boolean append)
                               throws MalformedURLException

Create a ClassLoader with the JARs found in dirStr.

Parameters:

dirStr - List of directories to search for JARs, separated by File.pathSeparator

recursive - Whether to recurse into subdirectories of the directories in dirStr

append - TODO

Returns:

a ClassLoader object.

Throws:

MalformedURLException - if any.

loadClasses

public static ClassLoader loadClasses(File dir,
                                      boolean recursive)
                               throws MalformedURLException

Create a ClassLoader with the JARs found in dir.

Parameters:

dir - Directory to search for JARs

recursive - Whether to recurse into subdirectories of dir

Returns:

a ClassLoader object.

Throws:

MalformedURLException - if any.

newClassLoader

public static ClassLoader newClassLoader(LinkedList<URL> urls)

Create a ClassLoader with the list of URLs found in urls.

Parameters:

urls - List of URLs to add to the ClassLoader's search list.

Returns:

a ClassLoader object.

loadClasses

public static void loadClasses(File dir,
                               boolean recursive,
                               LinkedList<URL> urls)
                        throws MalformedURLException

Add JARs found in dir to the LinkedList urls.

Parameters:

dir - Directory to search for JARs

recursive - Whether to recurse into subdirectories of the directory in dir

urls - LinkedList to append found JARs onto

Throws:

MalformedURLException - if any.

findOpenNMSHome

public static File findOpenNMSHome()

Determine the OpenNMS home directory based on the location of the JAR file containing this code. Finds the JAR file containing this code, and if it is found, the file name of the JAR (e.g.: opennms_bootstrap.jar) and its parent directory (e.g.: the lib directory) are removed from the path and the resulting path (e.g.: /opt/OpenNMS) is returned.

Returns:

Home directory or null if it couldn't be found

loadProperties

protected static void loadProperties(InputStream is)
                              throws IOException

Copy properties from a property input stream to the system properties. Specific properties are copied from the given InputStream.

Parameters:

is - InputStream of the properties file to load.

Throws:

IOException

loadProperties

protected static boolean loadProperties(File f)
                                 throws IOException

Copy properties from a property file to the system properties.

Throws:

IOException

loadDefaultProperties

protected static boolean loadDefaultProperties(File opennmsHome)
                                        throws IOException

Load default properties from the specified OpenNMS home into the system properties.

Parameters:

opennmsHome - the OpenNMS home directory

Returns:

whether the property file was able to be loaded into the System properties

Throws:

IOException

main

public static void main(String[] args)
                 throws Exception

Bootloader main method. Takes the following steps to initialize a ClassLoader, set properties, and start OpenNMS:

• Checks for existence of opennms.home system property, and loads properties file located at ${opennms.home}/etc/bootstrap.properties if it exists.
• Calls findOpenNMSHome to determine the OpenNMS home directory if the bootstrap.properties file has not yet been loaded. Sets the opennms.home system property to the path returned from findOpenNMSHome.
• Calls loadClasses to create a new ClassLoader. ${opennms.home}/etc and ${opennms.home/lib} are passed to loadClasses.
• Determines the proper default value for configuration options when overriding system properties have not been set. Below are the default values.
  • opennms.library.jicmp: ClassLoader.getResource(System.mapLibraryName("jicmp"))
  • opennms.library.jrrd: ClassLoader.getResource(System.mapLibraryName("jrrd"))
  • log4j.configuration: "log4j.properties"
  • jcifs.properties: ClassLoader.getResource("jcifs.properties")
• Finally, the main method of org.opennms.netmgt.vmmgr.Controller is invoked with the parameters passed in argv.

Parameters:

args - Command line arguments

Throws:

Exception - if any.

executeClass

protected static void executeClass(String classToExec,
                                   String classToExecMethod,
                                   String[] classToExecArgs,
                                   boolean appendClasspath)
                            throws MalformedURLException,
                                   ClassNotFoundException,
                                   NoSuchMethodException

Throws:

MalformedURLException

ClassNotFoundException

NoSuchMethodException

loadDefaultProperties

protected static void loadDefaultProperties()
                                     throws Exception

Throws:

Exception