ReloadModuleDeploymentsWebscript.java

/*
 * Copyright (C) 2005-2012 Alfresco Software Limited.
 *
 * This file is part of Alfresco
 *
 * Alfresco 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 3 of the License, or
 * (at your option) any later version.
 *
 * Alfresco 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 Alfresco. If not, see <http://www.gnu.org/licenses/>.
 */
package org.alfresco.web.scripts;

import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.springframework.beans.BeansException;
import org.springframework.extensions.surf.persister.PersisterService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.extensions.surf.ModuleDeploymentService;
import org.springframework.extensions.surf.persister.CachedPersister;
import org.springframework.extensions.surf.types.ModuleDeployment;
import org.springframework.extensions.webscripts.Cache;
import org.springframework.extensions.webscripts.DeclarativeWebScript;
import org.springframework.extensions.webscripts.Status;
import org.springframework.extensions.webscripts.WebScriptRequest;

/**
 * @author Joram Barrez
 */
public class ReloadModuleDeploymentsWebscript extends DeclarativeWebScript implements ApplicationContextAware 
{

  private ApplicationContext applicationContext;

  @Override
  protected Map<String, Object> executeImpl(WebScriptRequest req, Status status, Cache cache) 
  {
    Map<String, CachedPersister> persisters = applicationContext.getBeansOfType(CachedPersister.class);
    
    for (CachedPersister persister : persisters.values())
    {
      persister.invalidateCache();
    }
    
    ModuleDeploymentService moduleDeploymentService = applicationContext.getBean(ModuleDeploymentService.class);
    
    // I'm not very proud on this. But it's really very temporary.
    try 
    {
      Class  moduleDeploymentClass = moduleDeploymentService.getClass();
      Field field = moduleDeploymentClass.getDeclaredField("configuredModules");
      field.setAccessible(true);
      field.set(moduleDeploymentService, null);
      
      field = moduleDeploymentClass.getDeclaredField("deployedModules");
      field.setAccessible(true);
      field.set(moduleDeploymentService, null);
      
      // Call the following method will also trigger a reload from the persisted extensions
      List<ModuleDeployment> moduleDeployments = moduleDeploymentService.getDeployedModules();
      System.out.println("Found " + moduleDeployments.size() + " module deployments");
      
      PersisterService persister = applicationContext.getBean(PersisterService.class);
      persister.init();
      
    } catch (Exception e) {
      e.printStackTrace();
    }
    
    return new HashMap<String, Object>();
  }

  public void setApplicationContext(ApplicationContext applicationContext) throws BeansException 
  {
    this.applicationContext = applicationContext;
  }

}