/Users/nah/Documents/code/cast/src/java/cast/architecture/AlwaysPositiveTaskManager.java

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/*
 * CAST - The CoSy Architecture Schema Toolkit
 *
 * Copyright (C) 2006-2007 Nick Hawes
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

package cast.architecture;

import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;

import cast.cdl.TaskManagementDecision;
import cast.cdl.TaskOutcome;
import cast.core.Pair;

public class AlwaysPositiveTaskManager extends SubarchitectureTaskManager {

        @Override
        protected void taskCompleted(String _component, String _taskID,
                        TaskOutcome _data) {

        }

        @Override
        protected void taskProposed(String _component, String _taskID,
                        String _taskName) {
                if (m_goalQueue == null) {
                        m_goalQueue = new ConcurrentLinkedQueue<Pair<String, String>>();
                }
                m_goalQueue.add(new Pair<String, String>(_component, _taskID));
        }

        @Override
        protected void taskRetracted(String _component, String _taskID) {
                for (Pair<String, String> task : m_goalQueue) {
                        if (task.m_second.equals(_taskID)) {
                                m_goalQueue.remove(task);
                                return;
                        }
                }
        }

        private Queue<Pair<String, String>> m_goalQueue;

        public AlwaysPositiveTaskManager() {
                receiveNoChanges();
        }

        protected void processTaskQueue() {
                while (!m_goalQueue.isEmpty()) {
                        Pair<String, String> task = m_goalQueue.poll();
                        sendTaskDecision(task.m_first, task.m_second,
                                        TaskManagementDecision.TaskAdopted);
                }
        }
        
        @Override
        protected void stop() {
                if(m_goalQueue != null) {
                        m_goalQueue.clear();
                }
                
                synchronized (m_proposalLock) {
                        m_proposalLock.notifyAll();                     
                }
        }

        @Override
        public void runComponent() {
                // System.out.println("AlwaysPositiveTaskManager.runComponent()");
                while (isRunning()) {

                        // println("waiting to check queue...");
                        if (m_goalQueue != null) {
                                lockComponent();
                                processTaskQueue();
                                unlockComponent();
                        }

                        waitForProposals();
                }

        }

        //
        //
        // /*
        // * (non-Javadoc)
        // *
        // * @see
        // caat.architecture.subarchitecture.SubarchitectureTaskManager#taskRegistered(java.lang.String,
        // * caat.corba.autogen.CAAT.TaskDescription)
        // */
        // @Override
        // protected void taskRegistered(String _src, TaskDescription[] _desc) {
        // for (int i = 0; i < _desc.length; i++) {
        // println("task registered: " + _desc[i].m_taskName);
        // }
        //
        // }

}

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