Package org.apache.isis.runtimes.dflt.runtime.system.context

Source Code of org.apache.isis.runtimes.dflt.runtime.system.context.IsisContextPipe

/*
*  Licensed to the Apache Software Foundation (ASF) under one
*  or more contributor license agreements.  See the NOTICE file
*  distributed with this work for additional information
*  regarding copyright ownership.  The ASF licenses this file
*  to you under the Apache License, Version 2.0 (the
*  "License"); you may not use this file except in compliance
*  with the License.  You may obtain a copy of the License at
*
*        http://www.apache.org/licenses/LICENSE-2.0
*
*  Unless required by applicable law or agreed to in writing,
*  software distributed under the License is distributed on an
*  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
*  KIND, either express or implied.  See the License for the
*  specific language governing permissions and limitations
*  under the License.
*/

package org.apache.isis.runtimes.dflt.runtime.system.context;

import org.apache.isis.core.commons.authentication.AuthenticationSession;
import org.apache.isis.core.commons.debug.DebugBuilder;
import org.apache.isis.runtimes.dflt.runtime.system.session.IsisSession;
import org.apache.isis.runtimes.dflt.runtime.system.session.IsisSessionFactory;

/**
* A specialised IsisContext implementation that provides two sets of components: one for the server; and one for the
* client. This simply determines the current thread and if that thread is the server thread then it provides server
* data. For any other thread the client data is used.
*/
public class IsisContextPipe extends IsisContextMultiUser {

    public static IsisContext createInstance(final IsisSessionFactory sessionFactory) {
        return new IsisContextPipe(sessionFactory);
    }

    private IsisSession clientSession;
    private IsisSession serverSession;

    private Thread server;

    // ///////////////////////////////////////////////////
    // Constructor
    // ///////////////////////////////////////////////////

    private IsisContextPipe(final IsisSessionFactory sessionFactory) {
        super(sessionFactory);
    }

    // ///////////////////////////////////////////////////
    // Server (not API)
    // ///////////////////////////////////////////////////

    public void setServer(final Thread server) {
        this.server = server;
    }

    private boolean isCurrentThreadServer() {
        return Thread.currentThread() == server;
    }

    // ///////////////////////////////////////////////////
    // getCurrent() Hook
    // ///////////////////////////////////////////////////

    @Override
    protected IsisSession getSessionInstance(final String sessionId) {
        return null;
    }

    @Override
    public IsisSession getSessionInstance() {
        if (isCurrentThreadServer()) {
            return serverSession;
        } else {
            return clientSession;
        }
    }

    @Override
    public IsisSession openSessionInstance(final AuthenticationSession authenticationSession) {
        applySessionClosePolicy();
        final IsisSession newSession = getSessionFactoryInstance().openSession(authenticationSession);
        if (isCurrentThreadServer()) {
            serverSession = newSession;
        } else {
            clientSession = newSession;
        }
        return newSession;
    }

    // ///////////////////////////////////////////////////
    // shutdown
    // ///////////////////////////////////////////////////

    @Override
    public void closeAllSessionsInstance() {
    }

    // ///////////////////////////////////////////////////
    // Execution Context Ids
    // ///////////////////////////////////////////////////

    @Override
    public String[] allSessionIds() {
        return new String[] { clientSession.getId(), serverSession.getId() };
    }

    // ///////////////////////////////////////////////////
    // Debugging
    // ///////////////////////////////////////////////////

    @Override
    public String debugTitle() {
        return "Isis (pipe) " + Thread.currentThread().getName();
    }

    @Override
    public void debugData(final DebugBuilder debug) {
        super.debugData(debug);
        debug.appendln("Server thread", server);
    }

}
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