/*
    * Copyright 2007 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.kuali.rice.core.config.ConfigContext;
  import org.kuali.rice.core.lifecycle.BaseLifecycle;
  import org.kuali.rice.ksb.messaging.AsynchronousCall;
  import org.kuali.rice.ksb.messaging.PersistedMessage;
  import org.kuali.rice.ksb.messaging.callforwarding.ForwardedCallHandlerImpl;
  import org.kuali.rice.ksb.messaging.config.ServiceBasedServiceDefinitionRegisterer;
  import org.kuali.rice.ksb.messaging.service.BusAdminService;
  import org.kuali.rice.ksb.messaging.threadpool.KSBThreadPool;
  import org.kuali.rice.ksb.service.KSBServiceLocator;
  
  
  /**
   * 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 ServiceBasedServiceDefinitionRegisterer defRegisterer;
  
      public void forward(PersistedMessage message) throws Exception {
  	// this is just weird...
  	AsynchronousCall methodCall = message.getPayload().getMethodCall();
  	message.setMethodCall(methodCall);
  	// TODO there's probably a better way to servisize or refactor this
  	new ForwardedCallHandlerImpl().handleCall(message);
      }
  
      public void ping() {
      }
  
      public void setCorePoolSize(int corePoolSize) {
  	LOG.info("Setting core pool size to " + corePoolSize);
  	KSBServiceLocator.getThreadPool().setCorePoolSize(corePoolSize);
      }
  
      public void setMaximumPoolSize(int maxPoolSize) {
  	LOG.info("Setting max pool size to " + maxPoolSize);
  	KSBThreadPool threadPool = KSBServiceLocator.getThreadPool();
  	if (maxPoolSize < threadPool.getCorePoolSize()) {
  	    maxPoolSize = threadPool.getCorePoolSize();
  	}
  	threadPool.setMaximumPoolSize(maxPoolSize);
      }
  
      public void setConfigProperty(String propertyName, String propertyValue) {
  	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);
  	}
      }
  
      public void start() throws Exception {
  	this.defRegisterer = new ServiceBasedServiceDefinitionRegisterer("ksb.busAdminServiceDefinition");
  	this.defRegisterer.registerServiceDefinition(false);
  	setStarted(true);
      }
  
      public void stop() throws Exception {
  	this.defRegisterer.unregisterServiceDefinition();
  	setStarted(false);
      }
  
  }