/*

  * Copyright 2011 The Kuali Foundation

  *

  * Licensed under the Educational Community License, Version 1.0 (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/ecl1.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.core.api.config;

 import org.apache.commons.lang.StringUtils;

 import org.kuali.rice.core.api.CoreConstants;

 import org.kuali.rice.core.api.config.property.ConfigContext;

 /**

  * A utility class to help with retrieving commong configuration parameters. 

  * 

  * @author Kuali Rice Team (rice.collab@kuali.org)

  *

  */

 public final class CoreConfigHelper {

     /**

          * Returns the ID of this instance.

          *

          * @return the ID of this instance, should never return a null or blank value

          *

          * @throws IllegalStateException if the instance ID is not configured properly

          */

         public static String getInstanceId() {

                 String applicationId = ConfigContext.getCurrentContextConfig().getProperty(CoreConstants.Config.INSTANCE_ID);

                 if (StringUtils.isBlank(applicationId)) {

                         throw new IllegalStateException(CoreConstants.Config.INSTANCE_ID + " configuration parameter was not configured, please configure a proper non-empty value.");

                 }

                 return applicationId;

         }

         /**

          * Returns the ID of this application.

          * 

          * @return the ID of this application, should never return a null or blank value 

          * 

          * @throws IllegalStateException if the application ID is not configured properly

          */

         public static String getApplicationId() {

                 String applicationId = ConfigContext.getCurrentContextConfig().getProperty(CoreConstants.Config.APPLICATION_ID);

                 if (StringUtils.isBlank(applicationId)) {

                         throw new IllegalStateException(CoreConstants.Config.APPLICATION_ID + " configuration parameter was not configured, please configure a proper non-empty value.");

                 }

                 return applicationId;

         }

         private CoreConfigHelper() {

                 throw new UnsupportedOperationException("Should never be invoked!");

         }

 }