/*
    * Copyright 2005-2009 The Kuali Foundation
    * 
    * 
    * Licensed under the Educational Community License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    * 
    * http://www.opensource.org/licenses/ecl2.php
   * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.kuali.rice.ksb.messaging;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.rice.core.config.ConfigContext;
  import org.kuali.rice.core.config.ConfigurationException;
  import org.kuali.rice.core.config.ModuleConfigurer;
  
  /**
   * A KSBExporter which will exports the service in the case where the specified
   * run mode is set.  The run mode order proceeds as follows:
   * 
   * <p>remote -> embedded -> local
   * 
   * <p>If any of the earlier run modes in the list is set, then the ones after it
   * will be applied.  So, if remote is set, then it will automatically be exported
   * for embedded and local run modes.
   * 
   * @author Kuali Rice Team (kuali-rice@googlegroups.com)
   */
  public class RunModeServiceExporter extends PropertyConditionalKSBExporter {
  	
      private String runModePropertyName;
      private String validRunMode;
      private static final List<String> runModeHierarchy = new ArrayList<String>();
      static {
      	runModeHierarchy.add(ModuleConfigurer.THIN_RUN_MODE);
      	runModeHierarchy.add(ModuleConfigurer.REMOTE_RUN_MODE);
      	runModeHierarchy.add(ModuleConfigurer.EMBEDDED_RUN_MODE);
      	runModeHierarchy.add(ModuleConfigurer.LOCAL_RUN_MODE);
      }
  
      @Override
  	protected boolean shouldRemoteThisService() throws Exception {
      	if (StringUtils.isBlank(validRunMode)) {
      		throw new ConfigurationException("The validRunMode property was not set.");
      	}
      	if (!runModeHierarchy.contains(getValidRunMode())) {
      		throw new ConfigurationException("Given validRunMode is not a valid run mode.  Value was: " + getValidRunMode());
      	}
  		String runModePropertyValue = ConfigContext.getCurrentContextConfig().getProperty(getRunModePropertyName());
      	if (StringUtils.isBlank(runModePropertyValue)) {
      		throw new ConfigurationException("Given runModePropertyName does not have a value.  The runModePropertyName was " + getRunModePropertyName());
      	}
      	if (!runModeHierarchy.contains(runModePropertyValue)) {
      		throw new ConfigurationException("Run mode value set on runModePropertyName of '" + getRunModePropertyName() + "' is not a valid run mode.  Value was: " + runModePropertyValue);
      	}
      	List<String> validRunModeSubList = runModeHierarchy.subList(runModeHierarchy.indexOf(getValidRunMode()), runModeHierarchy.size());
      	return validRunModeSubList.contains(runModePropertyValue) && super.shouldRemoteThisService();
  	}
  
  	public String getRunModePropertyName() {
          return this.runModePropertyName;
      }
  
      public void setRunModePropertyName(String runModePropertyName) {
          this.runModePropertyName = runModePropertyName;
      }
  
      public String getValidRunMode() {
          return this.validRunMode;
      }
  
      public void setValidRunMode(String validRunMode) {
          this.validRunMode = validRunMode;
      }
      
  }