org.jboss.virtual.plugins.cache
Class CachePolicyVFSCache<T extends org.jboss.util.CachePolicy>

java.lang.Object
  org.jboss.virtual.plugins.cache.AbstractVFSCache
      org.jboss.virtual.plugins.cache.PathMatchingVFSCache
          org.jboss.virtual.plugins.cache.CachePolicyVFSCache<T>

Type Parameters:

T - exact policy type

All Implemented Interfaces:

CacheStatistics, VFSCache

Direct Known Subclasses:

LRUVFSCache, TimedVFSCache

public abstract class CachePolicyVFSCache<T extends org.jboss.util.CachePolicy>
extends PathMatchingVFSCache

Cache policy vfs cache.

Author:

Ales Justin

Field Summary

Fields inherited from class org.jboss.virtual.plugins.cache.AbstractVFSCache

log

Constructor Summary

protected	CachePolicyVFSCache()
protected	CachePolicyVFSCache(Map<Object,Object> properties)

Method Summary

protected void	check() Is cache valid.
protected abstract T	createCachePolicy() Create cache policy.
void	flush() Flush the cache.
Iterable<VFSContext>	getCachedContexts() Get cached contexts.
protected VFSContext	getContext(String path) Get the cached context.
protected static Integer	getInteger(Object value) Get integer from value.
protected T	getPolicy() Get the policy.
protected static Integer	parseInteger(String value) Parse integer.
protected void	putContext(String path, VFSContext context) Put vfs context and its path key into cache.
protected Object	readInstanceProperties(String key, Object defaultValue, boolean useSystemProperties) Read instance properties.
protected static String	readSystemProperty(String key, String defaultValue) Read system property.
void	removeContext(String key, VFSContext context) Remove vfs context and its path key from cache.
int	size() Get cache size.
void	start() Start the cache.
void	stop() Stop the cache.

Methods inherited from class org.jboss.virtual.plugins.cache.PathMatchingVFSCache

findContext

Methods inherited from class org.jboss.virtual.plugins.cache.AbstractVFSCache

findContext, lastInsert, putContext, readLock, readUnlock, removeContext, writeLock, writeUnlock

Methods inherited from class java.lang.Object

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

Constructor Detail

CachePolicyVFSCache

protected CachePolicyVFSCache()

CachePolicyVFSCache

protected CachePolicyVFSCache(Map<Object,Object> properties)

Method Detail

getCachedContexts

public Iterable<VFSContext> getCachedContexts()

Description copied from interface: CacheStatistics

Get cached contexts.

Returns:

the cached contexts

size

public int size()

Description copied from interface: CacheStatistics

Get cache size.

Returns:

the cache size

getPolicy

protected T getPolicy()

Get the policy. Run check before.

Returns:

the policy

check

protected void check()

Description copied from class: AbstractVFSCache

Is cache valid.

Specified by:

check in class AbstractVFSCache

start

public void start()
           throws Exception

Description copied from interface: VFSCache

Start the cache.

Throws:

Exception - for any error

stop

public void stop()

Description copied from interface: VFSCache

Stop the cache.

flush

public void flush()

Description copied from interface: VFSCache

Flush the cache.

getContext

protected VFSContext getContext(String path)

Description copied from class: AbstractVFSCache

Get the cached context.

Specified by:

getContext in class AbstractVFSCache

Parameters:

path - the path to match

Returns:

cached context or null if not found

putContext

protected void putContext(String path,
                          VFSContext context)

Description copied from class: AbstractVFSCache

Put vfs context and its path key into cache.

Specified by:

putContext in class AbstractVFSCache

Parameters:

path - the context's path

context - the vfs context

removeContext

public void removeContext(String key,
                          VFSContext context)

Description copied from class: AbstractVFSCache

Remove vfs context and its path key from cache.

Specified by:

removeContext in class AbstractVFSCache

Parameters:

key - the context's path

context - the vfs context

createCachePolicy

protected abstract T createCachePolicy()

Create cache policy.

Returns:

the cache policy

readInstanceProperties

protected Object readInstanceProperties(String key,
                                        Object defaultValue,
                                        boolean useSystemProperties)

Read instance properties.

Parameters:

key - the property key

defaultValue - the default value

useSystemProperties - do we fallback to system properties

Returns:

property or default value

readSystemProperty

protected static String readSystemProperty(String key,
                                           String defaultValue)

Read system property.

Parameters:

key - the property key

defaultValue - the default value

Returns:

system property or default value

parseInteger

protected static Integer parseInteger(String value)

Parse integer.

Parameters:

value - the string int value

Returns:

integer value or null

getInteger

protected static Integer getInteger(Object value)

Get integer from value.

Parameters:

value - the value

Returns:

integer value or null