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 * obtain a copy of the License at
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package org.glassfish.web.ha.authenticator;

import com.sun.enterprise.container.common.spi.util.JavaEEIOUtils;
import com.sun.enterprise.security.web.GlassFishSingleSignOn;
import org.apache.catalina.Session;
import org.apache.catalina.authenticator.SingleSignOnEntry;
import org.glassfish.ha.store.api.BackingStore;
import org.glassfish.ha.store.api.BackingStoreException;
import org.glassfish.web.ha.LogFacade;

import java.security.Principal;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * @author Shing Wai Chan
 */
public class HASingleSignOn extends GlassFishSingleSignOn {
    private static final Logger logger = LogFacade.getLogger();

    private BackingStore ssoEntryMetadataBackingStore = null;

    private JavaEEIOUtils ioUtils = null;

    public HASingleSignOn(JavaEEIOUtils ioUtils,
            BackingStore ssoEntryMetadataBackingStore) {
        super();
        this.ioUtils = ioUtils;
        this.ssoEntryMetadataBackingStore = ssoEntryMetadataBackingStore;
    }

    @Override
    protected void deregister(final String ssoId) {

        //S1AS8 6155481 START
        if (logger.isLoggable(Level.FINE)) {
            logger.fine("Deregistering sso id '" + ssoId + "'");
        }
        //S1AS8 6155481 END
        // Look up and remove the corresponding SingleSignOnEntry
        final SingleSignOnEntry sso = this.cache.remove(ssoId);
        if (sso == null) {
            return;
        }

        // Expire any associated sessions
        sso.expireSessions();

        try {
            this.ssoEntryMetadataBackingStore.remove(ssoId);
        } catch(BackingStoreException ex) {
            throw new IllegalStateException(ex);
        }
        // NOTE:  Clients may still possess the old single sign on cookie,
        // but it will be removed on the next request since it is no longer
        // in the cache
    }

    @Override
    protected void register(String ssoId, Principal principal, String authType,
                  String username, char[] password, String realmName) {

        if (logger.isLoggable(Level.FINE)) {
            logger.fine("Registering sso id '" + ssoId+ "' for principal '" + principal + "' and username '" + username
                    + "' with auth type '" + authType + "' and realmName '" + realmName + "'");
        }

        final HASingleSignOnEntry ssoEntry = new HASingleSignOnEntry(
            ssoId,
            principal,
            authType,
            username,
            realmName,
            // revisit maxIdleTime 1000000, version 0
            System.currentTimeMillis(),
            1000000,
            0,
            ioUtils
        );

        this.cache.put(ssoId, ssoEntry);

        try {
            this.ssoEntryMetadataBackingStore.save(ssoId, ssoEntry.getMetadata(), true);
        } catch(BackingStoreException ex) {
            throw new IllegalStateException(ex);
        }
    }

    @Override
    public void associate(String ssoId, long ssoVersion, Session session) {

        if (!started) {
            return;
        }

        if (debug >= 1)
            log("Associate sso id " + ssoId + " with session " + session);

        HASingleSignOnEntry sso = (HASingleSignOnEntry)lookup(ssoId, ssoVersion);
        if (sso != null) {
            session.setSsoId(ssoId);
            sso.addSession(this, session);

            try {
                ssoEntryMetadataBackingStore.save(ssoId, sso.getMetadata(), false);
            } catch(BackingStoreException ex) {
                throw new IllegalStateException(ex);
            }
        }
    }

    @Override
    protected SingleSignOnEntry lookup(final String ssoId, final long ssoVersion) {
        SingleSignOnEntry ssoEntry = super.lookup(ssoId, ssoVersion);
        if (ssoEntry != null && ssoVersion > ssoEntry.getVersion()) {
            // clean the old cache
            this.cache.remove(ssoId);
            ssoEntry = null;
        }

        if (ssoEntry == null) {
            // load from ha store
            try {
                final HASingleSignOnEntryMetadata mdata = this.ssoEntryMetadataBackingStore.load(ssoId, null);
                if (mdata != null) {
                    ssoEntry = new HASingleSignOnEntry(getContainer(), mdata, ioUtils);
                    this.cache.put(ssoId, ssoEntry);
                }
            } catch(BackingStoreException ex) {
                throw new IllegalStateException(ex);
            }
        }
        return ssoEntry;
    }

    @Override
    protected void removeSession(String ssoId, Session session) {

        if (logger.isLoggable(Level.FINE)) {
            logger.fine("Removing session " + session + " from sso id " + ssoId );
        }

        // Get a reference to the SingleSignOn
        HASingleSignOnEntry entry = (HASingleSignOnEntry)lookup(ssoId);
        if (entry == null)
            return;

        // Remove the inactive session from SingleSignOnEntry
        entry.removeSession(session);

        // If there are not sessions left in the SingleSignOnEntry,
        // deregister the entry.
        if (entry.isEmpty()) {
            deregister(ssoId);
        } else {
            try {
                ssoEntryMetadataBackingStore.save(ssoId, entry.getMetadata(), false);
            } catch(BackingStoreException ex) {
            }
        }
    }

    @Override
    public boolean isVersioningSupported() {
        return true;
    }
}