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package com.servicerocket.confluence.plugin.utility.library;

import com.atlassian.plugin.PluginAccessor;
import com.atlassian.plugin.event.PluginEventManager;
import com.atlassian.plugin.tracker.DefaultPluginModuleTracker;
import com.atlassian.plugin.tracker.PluginModuleTracker;
import com.servicerocket.confluence.randombits.support.core.env.EnvironmentProvider;
import com.servicerocket.confluence.randombits.support.core.impl.DefaultEnvironmentAssistant;
import org.springframework.beans.factory.DisposableBean;

/**
 * Temporary class to re-introduce module descriptor back into the plugin.
 * Should be merge with parent class once `randombits core` runtime library is consolidate into this plugin.
 *
 * @author Kai Ming
 * @since 2.1.1.20161207
 */
public class EnvironmentAssistantWithModuleTracker extends DefaultEnvironmentAssistant implements DisposableBean {
    private final PluginModuleTracker providerTracker;

    public EnvironmentAssistantWithModuleTracker(PluginAccessor pluginAccessor, PluginEventManager pluginEventManager) {
        this.providerTracker = new DefaultPluginModuleTracker<>(
                pluginAccessor, pluginEventManager, EnvironmentProviderModuleDescriptor.class, new CachingCustomizer()
        );
    }

    private class CachingCustomizer implements PluginModuleTracker.Customizer {

        @Override
        public EnvironmentProviderModuleDescriptor adding(EnvironmentProviderModuleDescriptor descriptor) {
            addProvider(descriptor.getModule());
            return descriptor;
        }

        @Override
        public void removed(EnvironmentProviderModuleDescriptor descriptor) {
            removeProvider(descriptor.getModule());
        }
    }

    @Override
    public void destroy() throws Exception {
        providerTracker.close();
    }
}