com.atlassian.greenhopper.service.timetracking
Class WorklogHistoryCacheImpl

java.lang.Object
  com.atlassian.greenhopper.service.timetracking.WorklogHistoryCacheImpl

All Implemented Interfaces:

WorklogHistoryCache

@Service(value="gh-worklogHistoryCache")
public class WorklogHistoryCacheImpl
extends java.lang.Object
implements WorklogHistoryCache

Field Summary

Fields inherited from interface com.atlassian.greenhopper.service.timetracking.WorklogHistoryCache

DEFAULT_MEMORY_SIZE, SERVICE

Constructor Summary

WorklogHistoryCacheImpl()

Method Summary

long	calculateInMemorySize() Warning: huge performance / blocking impact.
void	clear() Removes all entries from the cache
void	destroyCache() Destroy the backing ehcache
net.sf.ehcache.Element	getElement(java.lang.String issueKey) Get the cache element for the issue key.
long	getMemoryStoreSize()
double	getUsageRatio()
void	initCache() We'll get the configuration from the greenHopper data store, which will give us a user-defined entry or the default if there is none.
void	remove(java.lang.String issueKey)
void	resize(int newSize) Ehcache 1.6 doesn't allow resizing of the memory store.
void	setEntry(java.lang.String issueKey, java.util.SortedMap<org.joda.time.DateMidnight,DayWorkHistory> entry)

Methods inherited from class java.lang.Object

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

Constructor Detail

WorklogHistoryCacheImpl

public WorklogHistoryCacheImpl()

Method Detail

getElement

public net.sf.ehcache.Element getElement(java.lang.String issueKey)

Description copied from interface: WorklogHistoryCache

Get the cache element for the issue key. The actual cache value is not returned here directly, since null values are cached. So the result could be:

• null: there is no cached value for this issue
• Element with null value: there is a cached value for this issue, but it has no timeline (no need to recompute one)
• Element with value: regular cached value

Specified by:

getElement in interface WorklogHistoryCache

Parameters:

issueKey - : The issue to fetch the timeline for

remove

public void remove(java.lang.String issueKey)

Specified by:

remove in interface WorklogHistoryCache

setEntry

public void setEntry(java.lang.String issueKey,
                     java.util.SortedMap<org.joda.time.DateMidnight,DayWorkHistory> entry)

Specified by:

setEntry in interface WorklogHistoryCache

clear

public void clear()

Description copied from interface: WorklogHistoryCache

Removes all entries from the cache

Specified by:

clear in interface WorklogHistoryCache

getMemoryStoreSize

public long getMemoryStoreSize()

Specified by:

getMemoryStoreSize in interface WorklogHistoryCache

Returns:

The number of entries currently in the memory cache

calculateInMemorySize

public long calculateInMemorySize()

Description copied from interface: WorklogHistoryCache

Warning: huge performance / blocking impact. Use with care.

Specified by:

calculateInMemorySize in interface WorklogHistoryCache

getUsageRatio

public double getUsageRatio()

Specified by:

getUsageRatio in interface WorklogHistoryCache

Returns:

the memory cache usage ratio - percentage of how much of the memory cache is currently used

resize

public void resize(int newSize)

Ehcache 1.6 doesn't allow resizing of the memory store. To avoid stale data (an entry could be invalidated while we're carrying it over), we create an empty cache instance and replace the live one once it's registered (initialised)

Specified by:

resize in interface WorklogHistoryCache

Parameters:

newSize - : The maximum number of entries that the cache can hold.

initCache

public void initCache()
               throws java.lang.IllegalStateException

We'll get the configuration from the greenHopper data store, which will give us a user-defined entry or the default if there is none.

Throws:

java.lang.IllegalStateException - if the backing ehcache implementation is not in a correct state

destroyCache

public void destroyCache()
                  throws java.lang.IllegalStateException

Destroy the backing ehcache

Throws:

java.lang.IllegalStateException - if the backing ehcache implementation is not in a correct state