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

   1 /*
   2  * Copyright (C) 2010 Mathieu Baudier <mbaudier@argeo.org>
   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
  17 package org.argeo.slc.core.execution;
  18
  19 import java.util.List;
  20 import java.util.Map;
  21
  22 import org.apache.commons.logging.Log;
  23 import org.apache.commons.logging.LogFactory;
  24 import org.argeo.slc.SlcException;
  25 import org.springframework.beans.BeansException;
  26 import org.springframework.beans.MutablePropertyValues;
  27 import org.springframework.beans.factory.config.BeanDefinition;
  28 import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
  29 import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
  30 import org.springframework.beans.factory.support.BeanDefinitionRegistry;
  31 import org.springframework.beans.factory.support.GenericBeanDefinition;
  32 import org.springframework.core.Ordered;
  33 import org.springframework.core.PriorityOrdered;
  34
  35 public abstract class AbstractExecutionFlowGenerator implements
  36                 BeanFactoryPostProcessor, PriorityOrdered {
  37         private final Log log = LogFactory.getLog(getClass());
  38
  39         protected abstract Map<String, BeanDefinition> createExecutionFlowDefinitions(
  40                         ConfigurableListableBeanFactory beanFactory);
  41
  42         public void postProcessBeanFactory(
  43                         ConfigurableListableBeanFactory beanFactory) throws BeansException {
  44                 if (!(beanFactory instanceof BeanDefinitionRegistry)) {
  45                         throw new SlcException("Can only work on "
  46                                         + BeanDefinitionRegistry.class);
  47                 }
  48
  49                 Map<String, BeanDefinition> definitions = createExecutionFlowDefinitions(beanFactory);
  50
  51                 for (String beanName : definitions.keySet()) {
  52                         if (log.isTraceEnabled())
  53                                 log.debug("Registering execution flow " + beanName);
  54                         ((BeanDefinitionRegistry) beanFactory).registerBeanDefinition(
  55                                         beanName, definitions.get(beanName));
  56                 }
  57         }
  58
  59         protected GenericBeanDefinition createDefaultFlowDefinition(
  60                         List<Runnable> executables) {
  61                 GenericBeanDefinition bd = new GenericBeanDefinition();
  62                 bd.setBeanClass(DefaultExecutionFlow.class);
  63
  64                 MutablePropertyValues mpv = new MutablePropertyValues();
  65                 mpv.addPropertyValue("executables", executables);
  66
  67                 bd.setPropertyValues(mpv);
  68                 return bd;
  69         }
  70
  71         public int getOrder() {
  72                 return Ordered.HIGHEST_PRECEDENCE;
  73         }
  74
  75 }