/*
    * Copyright 2006-2011 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.service.impl;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.rice.core.api.config.property.ConfigContext;
  import org.kuali.rice.core.api.exception.RiceIllegalArgumentException;
  import org.kuali.rice.core.api.lifecycle.BaseLifecycle;
  import org.kuali.rice.ksb.messaging.service.BusAdminService;
  import org.kuali.rice.ksb.messaging.threadpool.KSBThreadPool;
  
  
  /**
   * Implementation of the Bus Admin service.
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class BusAdminServiceImpl extends BaseLifecycle implements BusAdminService {
  
      private static final org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(BusAdminServiceImpl.class);
  
      private KSBThreadPool threadPool;
  
      public void setThreadPool(KSBThreadPool threadPool) {
      	this.threadPool = threadPool;
      }
      
      protected KSBThreadPool getThreadPool() {
      	return this.threadPool;
      }
  
      @Override
      public void ping() {
          LOG.info("ping called");
      }
  
      @Override
      public void setCorePoolSize(int corePoolSize) {
      	if (corePoolSize < 0) {
              throw new RiceIllegalArgumentException("corePoolSize < 0");
          }
  
          LOG.info("Setting core pool size to " + corePoolSize);
      	getThreadPool().setCorePoolSize(corePoolSize);
      }
  
      @Override
      public void setMaximumPoolSize(int maxPoolSize) {
      	if (maxPoolSize < 0) {
              throw new RiceIllegalArgumentException("maxPoolSize < 0");
          }
      	LOG.info("Setting max pool size to " + maxPoolSize);
      	if (maxPoolSize < getThreadPool().getCorePoolSize()) {
      		maxPoolSize = getThreadPool().getCorePoolSize();
      	}
      	getThreadPool().setMaximumPoolSize(maxPoolSize);
      }
  
      @Override
      public void setConfigProperty(String propertyName, String propertyValue) {
      	if (StringUtils.isBlank(propertyName)) {
              throw new RiceIllegalArgumentException("propertyName is null or blank");
          }
  
          String originalValue = ConfigContext.getCurrentContextConfig().getProperty(propertyName);
      	LOG.info("Changing config property '" + propertyName + "' from " + originalValue + " to " + propertyValue);
      	if (propertyValue == null) {
      		ConfigContext.getCurrentContextConfig().removeProperty(propertyName);
      	} else {
      		ConfigContext.getCurrentContextConfig().putProperty(propertyName, propertyValue);
      	}
      }
  
      @Override
      public void start() throws Exception {
      	if (getThreadPool() == null) {
      		throw new IllegalStateException("The threadPool has not been set on the busAdminService");
      	}
      	setStarted(true);
      }
  
      @Override
      public void stop() throws Exception {
      	setStarted(false);
      }
 
 }