litesoft
@ 912
litesoft / trunk / GWT_Sandbox / NAS-Video / src / org / litesoft / nasvideo / server / CurrentUserAccessor.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 |
package org.litesoft.nasvideo.server; import org.litesoft.bo.views.*; import org.litesoft.changemanagement.*; import org.litesoft.core.*; import org.litesoft.core.typeutils.*; import org.litesoft.nasvideo.client.boviews.*; import org.litesoft.nasvideo.server.boviews.podataproviders.*; import org.litesoft.nasvideo.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 ( !Objects.areNonArraysEqual( 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 && // Objects.areNonArraysEqual( mPO.getID(), mVO.getID() ) && // Objects.areNonArraysEqual( mPO.getRecordVersion(), mVO.getRecordVersion() ); } } } |
Commits for litesoft/trunk/GWT_Sandbox/NAS-Video/src/org/litesoft/nasvideo/server/CurrentUserAccessor.java
Revision | Author | Commited | Message |
---|---|---|---|
912 | GeorgeS | Fri 28 Jun, 2013 06:48:05 +0000 | Revert to mixed & Working (PEDS & Prioritizer) code! |