com.inductiveautomation.ignition.gateway.bootstrap

Class NonLockingUrlClassLoader

java.lang.Object

java.lang.ClassLoader

java.security.SecureClassLoader

java.net.URLClassLoader

com.inductiveautomation.ignition.gateway.bootstrap.NonLockingUrlClassLoader

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

Direct Known Subclasses:

SRClassLoader

public class NonLockingUrlClassLoader
extends java.net.URLClassLoader

A URLClassLoader that moves all loaded resources off into a temp directory before actually loading them to avoid file locking.

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	cacheJars
protected java.io.File	jarDir
protected org.apache.log4j.Logger	log
protected java.lang.String	name

Constructor Summary

Constructors

Constructor and Description
NonLockingUrlClassLoader(java.lang.ClassLoader parent, java.io.File jarDir, java.lang.String name)
NonLockingUrlClassLoader(java.lang.ClassLoader parent, java.io.File jarDir, java.lang.String name, boolean cacheJars) Use this constructor and set cacheJars to true to be able to cache jars over Gateway restarts.

Method Summary

Modifier and Type	Method and Description
void	addCachedJarFile(java.io.File cachedJar) Adds a previously cached jar file to the classloader
void	addJarFile(java.io.File f)
java.io.File	addJarFile(java.lang.String filename, java.io.InputStream is)
void	addSourceDirectory(java.io.File dir)
void	addSourceDirectory(java.io.File dir, java.io.FileFilter filter)
protected void	addURL(java.net.URL url)
protected void	finalize()
java.io.File	getJarDir()
static void	main(java.lang.String[] args)

Methods inherited from class java.net.URLClassLoader

close, definePackage, findClass, findResource, findResources, getPermissions, getResourceAsStream, getURLs, newInstance, newInstance

Methods inherited from class java.security.SecureClassLoader

defineClass, defineClass

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findLibrary, findLoadedClass, findSystemClass, getClassLoadingLock, getPackage, getPackages, getParent, getResource, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, loadClass, loadClass, registerAsParallelCapable, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods inherited from class java.lang.Object

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

Field Detail

log

protected org.apache.log4j.Logger log

jarDir

protected java.io.File jarDir

name

protected java.lang.String name

cacheJars

protected boolean cacheJars

Constructor Detail

NonLockingUrlClassLoader

public NonLockingUrlClassLoader(java.lang.ClassLoader parent,
                                java.io.File jarDir,
                                java.lang.String name)

NonLockingUrlClassLoader

public NonLockingUrlClassLoader(java.lang.ClassLoader parent,
                                java.io.File jarDir,
                                java.lang.String name,
                                boolean cacheJars)

Use this constructor and set cacheJars to true to be able to cache jars over Gateway restarts.

Parameters:

parent - the parent classloader for delegation

jarDir - the directory in which the jars are placed and/or cached

name - a name used to identify this classloader

cacheJars - whether or not to cache the jars across gateway reloads

Method Detail

getJarDir

public java.io.File getJarDir()

addSourceDirectory

public void addSourceDirectory(java.io.File dir)
                        throws java.io.IOException

Throws:

java.io.IOException

addSourceDirectory

public void addSourceDirectory(java.io.File dir,
                               java.io.FileFilter filter)
                        throws java.io.IOException

Throws:

java.io.IOException

addJarFile

public void addJarFile(java.io.File f)
                throws java.io.IOException

Throws:

java.io.IOException

addCachedJarFile

public void addCachedJarFile(java.io.File cachedJar)
                      throws java.net.MalformedURLException

Adds a previously cached jar file to the classloader

Parameters:

cachedJar - the jar to add to the classloader

Throws:

java.net.MalformedURLException - if the jar file's URI cannot be converted to a URL

addJarFile

public java.io.File addJarFile(java.lang.String filename,
                               java.io.InputStream is)
                        throws java.io.IOException

Throws:

java.io.IOException

addURL

protected void addURL(java.net.URL url)

Overrides:

addURL in class java.net.URLClassLoader

finalize

protected void finalize()
                 throws java.lang.Throwable

Overrides:

finalize in class java.lang.Object

Throws:

java.lang.Throwable

main

public static void main(java.lang.String[] args)