    001// Copyright 2013 The Apache Software Foundation
    002//
    003// Licensed under the Apache License, Version 2.0 (the "License");
    004// you may not use this file except in compliance with the License.
    005// You may obtain a copy of the License at
    006//
    007// http://www.apache.org/licenses/LICENSE-2.0
    008//
    009// Unless required by applicable law or agreed to in writing, software
    010// distributed under the License is distributed on an "AS IS" BASIS,
    011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012// See the License for the specific language governing permissions and
    013// limitations under the License.
    014
    015package org.apache.tapestry5.internal.services;
    016
    017import org.apache.tapestry5.alerts.AlertManager;
    018import org.apache.tapestry5.commons.util.CollectionFactory;
    019import org.apache.tapestry5.http.TapestryHttpSymbolConstants;
    020import org.apache.tapestry5.ioc.annotations.Symbol;
    021
    022import java.util.List;
    023
    024public class ReloadHelperImpl implements ReloadHelper
    025{
    026    private final AlertManager alertManager;
    027
    028    private final boolean productionMode;
    029
    030    private final List<Runnable> callbacks = CollectionFactory.newThreadSafeList();
    031
    032    public ReloadHelperImpl(AlertManager alertManager, @Symbol(TapestryHttpSymbolConstants.PRODUCTION_MODE) boolean productionMode)
    033    {
    034        this.alertManager = alertManager;
    035        this.productionMode = productionMode;
    036    }
    037
    038    public void forceReload()
    039    {
    040        if (productionMode)
    041        {
    042            alertManager.error("Can not force a reload in production mode.");
    043            return;
    044        }
    045
    046        for (Runnable c : callbacks)
    047        {
    048            c.run();
    049        }
    050
    051        alertManager.info("Component classes, templates, and messages reloaded.");
    052    }
    053
    054    public void addReloadCallback(Runnable callback)
    055    {
    056        assert callback != null;
    057
    058        callbacks.add(callback);
    059    }
    060}