litesoft
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litesoft / trunk / GWT_Sandbox / InitFrom / src / org / litesoft / initfrom / server / CurrentUserAccessor.java
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package org.litesoft.initfrom.server; import org.litesoft.bo.views.*; import org.litesoft.changemanagement.*; import org.litesoft.commonfoundation.base.*; import org.litesoft.core.*; import org.litesoft.initfrom.client.boviews.*; import org.litesoft.initfrom.server.boviews.podataproviders.*; import org.litesoft.initfrom.server.pos.*; public class CurrentUserAccessor implements ServerStateChangedListener { public static synchronized CurrentUserAccessor get() { ServerStore zStore = ServerContext.get().getServerStore(); CurrentUserAccessor zAccessor = zStore.get( CurrentUserAccessor.class ); if ( zAccessor == null ) { zStore.set( CurrentUserAccessor.class, zAccessor = new CurrentUserAccessor() ); } return zAccessor; } private boolean mViewStale; private ChangeListenerManager mRegisteredWithCLM; private User mPO; public User getRequiredUser() { User zUser = getOptionalUser( null ); if ( zUser == null ) { throw new SessionExpiredException( "No Current User" ); } return zUser; } public User getOptionalUser( String pDefaultUserLoginEmail ) { Pair zPair = getPair( pDefaultUserLoginEmail ); if ( zPair.getVO() == null ) { return null; } if ( (zPair.getPO() == null) || !zPair.inSync() ) { zPair = refresh( zPair ); } return zPair.getPO(); } public UserView getUserView( String pDefaultUserLoginEmail ) { Pair zPair = getPair( pDefaultUserLoginEmail ); if ( zPair.isStale() ) { zPair = refresh( zPair ); } return zPair.getVO(); } public void logout() { update( null, null ); } public UserView updateUser( User pPO ) { UserView zView = getDataProvider().createView( pPO, false ); update( zView, pPO ); return zView; } private Pair refresh( Pair pPair ) { UserViewPoServerVoDataProvider zDP = getDataProvider(); User zPO = (User) zDP.getPO( pPair.getVO().getID() ); return update( zDP.createView( zPO, false ), zPO ); } private Pair update( UserView pView, User pPO ) { Pair rv; User zOld, zNew; synchronized ( this ) { rv = new Pair( mViewStale = false, pView, pPO ); ServerContext.get().getServerSession().setAttribute( UserView.class, pView ); zOld = mPO; zNew = mPO = pPO; } if ( !Currently.areEqual( zOld, zNew ) ) { if ( zOld != null ) { mRegisteredWithCLM.removeListener( this ); mRegisteredWithCLM = null; } if ( zNew != null ) { (mRegisteredWithCLM = ChangeListenerManager.get()).addListener( this, User.class, zNew.getPersistentObjectUniqueKey() ); } } return rv; } private Pair getPair( String pDefaultUserLoginEmail ) { synchronized ( this ) { UserView zView = ServerContext.get().getServerSession().getAttribute( UserView.class ); if ( (zView != null) || (pDefaultUserLoginEmail == null) ) { return new Pair( mViewStale, zView, mPO ); } } getDataProvider().loginDefaultUser( pDefaultUserLoginEmail ); synchronized ( this ) { UserView zView = ServerContext.get().getServerSession().getAttribute( UserView.class ); return new Pair( mViewStale, zView, mPO ); } } @Override public synchronized void serverStateChanged( ServerStateChangeSet pServerStateChangeSet ) { mViewStale = true; } private UserViewPoServerVoDataProvider getDataProvider() { return (UserViewPoServerVoDataProvider) ServerContext.getMasterServerStore().get( ServerVoDataProviderMap.class ).get( UserView.class ); } private static class Pair { private boolean mStale; private UserView mVO; private User mPO; private Pair( boolean pStale, UserView pVO, User pPO ) { mStale = (pVO != null) && pStale; mVO = pVO; mPO = pPO; } public boolean isStale() { return mStale; } public UserView getVO() { return mVO; } public User getPO() { return mPO; } public boolean inSync() // Only called when Both are !null { return !mStale && // Currently.areEqual( mPO.getID(), mVO.getID() ) && // Currently.areEqual( mPO.getRecordVersion(), mVO.getRecordVersion() ); } } } |
Commits for litesoft/trunk/GWT_Sandbox/InitFrom/src/org/litesoft/initfrom/server/CurrentUserAccessor.java
Revision | Author | Commited | Message |
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950 Diff | GeorgeS | Thu 19 Jun, 2014 17:57:04 +0000 | New Lines |
948 Diff | GeorgeS | Sat 07 Jun, 2014 23:42:39 +0000 | Jusefuls Formatter Updated to New Code Format |
939 Diff | GeorgeS | Mon 02 Jun, 2014 21:30:31 +0000 | Extracting commonfoundation |
804 Diff | GeorgeS | Wed 15 Aug, 2012 12:48:51 +0000 | |
459 | GeorgeS | Sun 21 Aug, 2011 00:42:41 +0000 |