Package org.jruby.util

Class JarCache

java.lang.Object

org.jruby.util.JarCache

class JarCache
extends Object

Instances of JarCache provides jar index information.

Implementation is threadsafe. Since loading index information is O(jar-entries) we cache the snapshot in a WeakHashMap. The implementation pays attention to lastModified timestamp of the jar and will invalidate the cache entry if jar has been updated since the snapshot calculation.

****************************************************************************************** DANGER DANGER DANGER DANGER DANGER DANGER DANGER DANGER DANGER DANGER DANGER DANGER DANGER ****************************************************************************************** The spec for this cache is disabled currently for #2655, because of last-modified time oddities on CloudBees. Please be cautious modifying this code and make sure you run the associated spec locally.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static class	JarCache.JarIndex
private static class	JarCache.SoftJarIndex

Field Summary

Fields

Modifier and Type	Field	Description
private final Map<String,JarCache.SoftJarIndex>	indexCache
private final ReferenceQueue<JarCache.JarIndex>	indexQueue
private static final long	LAST_MODIFIED_EXPIRATION_TIME_MILLISECONDS	The timeout in milliseconds for caching the last modified timestamp of JAR files.

Constructor Summary

Constructors

Constructor	Description
JarCache()

Method Summary

Modifier and Type	Method	Description
private void	cleanup()
JarCache.JarIndex	getIndex(String jarPath)
void	remove(String jarPath)

Methods inherited from class java.lang.Object

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

Field Details

LAST_MODIFIED_EXPIRATION_TIME_MILLISECONDS

private static final long LAST_MODIFIED_EXPIRATION_TIME_MILLISECONDS

The timeout in milliseconds for caching the last modified timestamp of JAR files.

See Also:

• Constant Field Values

indexCache

private final Map<String,JarCache.SoftJarIndex> indexCache

indexQueue

private final ReferenceQueue<JarCache.JarIndex> indexQueue

Constructor Details

JarCache

JarCache()

Method Details

getIndex

public JarCache.JarIndex getIndex(String jarPath)

remove

public void remove(String jarPath)

cleanup

private void cleanup()