org.argeo.slc.core/src/org/argeo/slc/core/execution/AbstractExecutionFlowGenerator.java

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.slc.core.execution;
  17
  18 import java.util.List;
  19 import java.util.Map;
  20
  21 import org.apache.commons.logging.Log;
  22 import org.apache.commons.logging.LogFactory;
  23 import org.argeo.slc.SlcException;
  24 import org.springframework.beans.BeansException;
  25 import org.springframework.beans.MutablePropertyValues;
  26 import org.springframework.beans.factory.config.BeanDefinition;
  27 import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
  28 import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
  29 import org.springframework.beans.factory.support.BeanDefinitionRegistry;
  30 import org.springframework.beans.factory.support.GenericBeanDefinition;
  31 import org.springframework.core.Ordered;
  32 import org.springframework.core.PriorityOrdered;
  33
  34 public abstract class AbstractExecutionFlowGenerator implements
  35                 BeanFactoryPostProcessor, PriorityOrdered {
  36         private final Log log = LogFactory.getLog(getClass());
  37
  38         protected abstract Map<String, BeanDefinition> createExecutionFlowDefinitions(
  39                         ConfigurableListableBeanFactory beanFactory);
  40
  41         public void postProcessBeanFactory(
  42                         ConfigurableListableBeanFactory beanFactory) throws BeansException {
  43                 if (!(beanFactory instanceof BeanDefinitionRegistry)) {
  44                         throw new SlcException("Can only work on "
  45                                         + BeanDefinitionRegistry.class);
  46                 }
  47
  48                 Map<String, BeanDefinition> definitions = createExecutionFlowDefinitions(beanFactory);
  49
  50                 for (String beanName : definitions.keySet()) {
  51                         if (log.isTraceEnabled())
  52                                 log.debug("Registering execution flow " + beanName);
  53                         ((BeanDefinitionRegistry) beanFactory).registerBeanDefinition(
  54                                         beanName, definitions.get(beanName));
  55                 }
  56         }
  57
  58         protected GenericBeanDefinition createDefaultFlowDefinition(
  59                         List<Runnable> executables) {
  60                 GenericBeanDefinition bd = new GenericBeanDefinition();
  61                 bd.setBeanClass(DefaultExecutionFlow.class);
  62
  63                 MutablePropertyValues mpv = new MutablePropertyValues();
  64                 mpv.addPropertyValue("executables", executables);
  65
  66                 bd.setPropertyValues(mpv);
  67                 return bd;
  68         }
  69
  70         public int getOrder() {
  71                 return Ordered.HIGHEST_PRECEDENCE;
  72         }
  73
  74 }