de.xaniox.heavyspleef.core.module.ModuleManager.java Source code

Introduction

Here is the source code for de.xaniox.heavyspleef.core.module.ModuleManager.java

Source

/*
 * This file is part of HeavySpleef.
 * Copyright (c) 2014-2016 Matthias Werning
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package de.xaniox.heavyspleef.core.module;

import com.google.common.collect.Maps;

import java.util.Map;
import java.util.Map.Entry;
import java.util.logging.Level;
import java.util.logging.Logger;

public class ModuleManager {

    private final Logger logger;
    private Map<Module, LoadPolicy.Lifecycle> modules;

    public ModuleManager(Logger logger) {
        this.logger = logger;
        this.modules = Maps.newLinkedHashMap();
    }

    public void registerModule(Module module) {
        LoadPolicy.Lifecycle lifecycle = LoadPolicy.Lifecycle.POST_LOAD;
        Class<? extends Module> clazz = module.getClass();

        if (clazz.isAnnotationPresent(LoadPolicy.class)) {
            LoadPolicy policy = clazz.getAnnotation(LoadPolicy.class);
            lifecycle = policy.value();
        }

        modules.put(module, lifecycle);
    }

    public void enableModules(LoadPolicy.Lifecycle lifecycle) {
        for (Entry<Module, LoadPolicy.Lifecycle> entry : modules.entrySet()) {
            if (entry.getValue() != lifecycle) {
                continue;
            }

            try {
                entry.getKey().enable();
            } catch (Throwable t) {
                logger.log(Level.SEVERE,
                        "Unexpected exception occured while enabling module " + entry.getKey().getClass().getName(),
                        t);
            }
        }
    }

    public void disableModules() {
        for (Module module : modules.keySet()) {
            try {
                module.disable();
            } catch (Throwable t) {
                logger.log(Level.SEVERE,
                        "Unexpected exception occured while disabling module " + module.getClass().getName(), t);
            }
        }
    }

    public void reloadModules() {
        for (Module module : modules.keySet()) {
            try {
                module.reload();
            } catch (Throwable t) {
                logger.log(Level.SEVERE,
                        "Unexpected exception occured while reloading module " + module.getClass().getName(), t);
            }
        }
    }

    public Module getModule(Class<? extends Module> clazz) {
        for (Module module : modules.keySet()) {
            if (module.getClass() != clazz) {
                continue;
            }

            return module;
        }

        return null;
    }

}