Package org.zkoss.zkmax.ui.util

Class DesktopRecycle

java.lang.Object

org.zkoss.zkmax.ui.util.DesktopRecycle

All Implemented Interfaces:

org.zkoss.zk.ui.util.DesktopRecycle

public class DesktopRecycle
extends java.lang.Object
implements org.zkoss.zk.ui.util.DesktopRecycle

Used to recycle the desktop if possible.

Available in ZK EE

If you want to recycle only particular paths, you could override shallCache(org.zkoss.zk.ui.Desktop, java.lang.String, int) and shallReuse(org.zkoss.zk.ui.Desktop, java.lang.String, int).

Since:

5.0.0

Author:

tomyeh

Constructor Summary

Constructors

Constructor	Description
DesktopRecycle()

Method Summary

Modifier and Type	Method	Description
void	afterRemove(org.zkoss.zk.ui.Session sess, org.zkoss.zk.ui.Desktop desktop)
void	afterService(org.zkoss.zk.ui.Desktop desktop)
boolean	beforeRemove(org.zkoss.zk.ui.Execution exec, org.zkoss.zk.ui.Desktop desktop, int cause)
org.zkoss.zk.ui.Desktop	beforeService(org.zkoss.zk.ui.Execution exec, java.lang.String uri)
protected static java.lang.String	getURI(org.zkoss.zk.ui.Desktop desktop)	Returns the request URI of the desktop.
protected java.util.Map	newCache(org.zkoss.zk.ui.Session sess)	Instantiates the cache to hold the recycled desktop for the given session.
protected boolean	shallCache(org.zkoss.zk.ui.Desktop desktop, java.lang.String uri, int cause)	Returns whether to cache the desktop of the specified URI, such that we can reuse it later.
protected boolean	shallExpunge(org.zkoss.zk.ui.Desktop desktop, java.lang.String uri, int secElapsed)	Returns whether to remove it from the cache.
protected boolean	shallReuse(org.zkoss.zk.ui.Desktop desktop, java.lang.String uri, int secElapsed)	Returns whether to re-use the cached desktop.

Methods inherited from class java.lang.Object

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

Constructor Detail

DesktopRecycle

public DesktopRecycle()

Method Detail

beforeRemove

public boolean beforeRemove(org.zkoss.zk.ui.Execution exec,
                            org.zkoss.zk.ui.Desktop desktop,
                            int cause)

Specified by:

beforeRemove in interface org.zkoss.zk.ui.util.DesktopRecycle

getURI

protected static java.lang.String getURI(org.zkoss.zk.ui.Desktop desktop)

Returns the request URI of the desktop. It is a combination of Desktop.getRequestPath() and Desktop.getQueryString(). For example, if Desktop.getRequestPath() and Desktop.getQueryString() are "/foo.zul" and "abc=1", then this parameter is "/foo.zul?abc=1".

Since:

5.0.2

afterRemove

public void afterRemove(org.zkoss.zk.ui.Session sess,
                        org.zkoss.zk.ui.Desktop desktop)

Specified by:

afterRemove in interface org.zkoss.zk.ui.util.DesktopRecycle

beforeService

public org.zkoss.zk.ui.Desktop beforeService(org.zkoss.zk.ui.Execution exec,
                                             java.lang.String uri)

Specified by:

beforeService in interface org.zkoss.zk.ui.util.DesktopRecycle

afterService

public void afterService(org.zkoss.zk.ui.Desktop desktop)

Specified by:

afterService in interface org.zkoss.zk.ui.util.DesktopRecycle

newCache

protected java.util.Map newCache(org.zkoss.zk.ui.Session sess)

Instantiates the cache to hold the recycled desktop for the given session.

Default: instantiate a hash map.

Since:

5.0.7

shallCache

protected boolean shallCache(org.zkoss.zk.ui.Desktop desktop,
                             java.lang.String uri,
                             int cause)

Returns whether to cache the desktop of the specified URI, such that we can reuse it later.

The default implementation always return true. It means it tries to cache all paths.

If you want to cache only for, say, "/long-op/*", you can return true if path.startsWith("/long-op/").

Parameters:

uri - the request URI. It is a combination of Desktop.getRequestPath() and Desktop.getQueryString(). For example, if Desktop.getRequestPath() and Desktop.getQueryString() are "/foo.zul" and "abc=1", then this parameter is "/foo.zul?abc=1".

shallReuse

protected boolean shallReuse(org.zkoss.zk.ui.Desktop desktop,
                             java.lang.String uri,
                             int secElapsed)

Returns whether to re-use the cached desktop.

The default implementation return true if the page was served in 10 minutes (600 seconds).

Parameters:

secElapsed - the number of seconds elapsed since the page was served.

shallExpunge

protected boolean shallExpunge(org.zkoss.zk.ui.Desktop desktop,
                               java.lang.String uri,
                               int secElapsed)

Returns whether to remove it from the cache. It is called if shallReuse(org.zkoss.zk.ui.Desktop, java.lang.String, int) returns false.

Default: return true if the page was served more than 10 minutes ago (i.e., too old and we have to expunge it).

Since:

5.0.7