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

   1 /*
   2  * Copyright (C) 2007-2012 Mathieu Baudier
   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 org.apache.commons.logging.Log;
  19 import org.apache.commons.logging.LogFactory;
  20 import org.argeo.slc.SlcException;
  21 import org.argeo.slc.execution.ExecutionFlowDescriptor;
  22 import org.argeo.slc.execution.ExecutionStep;
  23 import org.argeo.slc.process.RealizedFlow;
  24 import org.springframework.security.Authentication;
  25 import org.springframework.security.context.SecurityContextHolder;
  26
  27 /** Thread of a single execution */
  28 public class ExecutionThread extends Thread {
  29         public final static String SYSPROP_EXECUTION_AUTO_UPGRADE = "slc.execution.autoupgrade";
  30
  31         private final static Log log = LogFactory.getLog(ExecutionThread.class);
  32
  33         private final RealizedFlow realizedFlow;
  34         private final ProcessThread processThread;
  35
  36         public ExecutionThread(ProcessThread processThread,
  37                         RealizedFlow realizedFlow) {
  38                 super(processThread.getProcessThreadGroup(), "Flow "
  39                                 + realizedFlow.getFlowDescriptor().getName());
  40                 this.realizedFlow = realizedFlow;
  41                 this.processThread = processThread;
  42         }
  43
  44         public void run() {
  45                 // authenticate thread
  46                 Authentication authentication = getProcessThreadGroup()
  47                                 .getAuthentication();
  48                 if (authentication == null)
  49                         throw new SlcException("Can only execute authenticated threads");
  50                 SecurityContextHolder.getContext().setAuthentication(authentication);
  51
  52                 if (getContextClassLoader() != null) {
  53                         if (log.isTraceEnabled())
  54                                 log.trace("Context class loader set to "
  55                                                 + getContextClassLoader());
  56                 }
  57
  58                 // Retrieve execution flow descriptor
  59                 ExecutionFlowDescriptor executionFlowDescriptor = realizedFlow
  60                                 .getFlowDescriptor();
  61                 String flowName = executionFlowDescriptor.getName();
  62
  63                 dispatchAddStep(new ExecutionStep(realizedFlow.getModuleName(),
  64                                 ExecutionStep.PHASE_START, "Flow " + flowName));
  65
  66                 try {
  67                         String autoUpgrade = System
  68                                         .getProperty(SYSPROP_EXECUTION_AUTO_UPGRADE);
  69                         if (autoUpgrade != null && autoUpgrade.equals("true"))
  70                                 processThread.getExecutionModulesManager().upgrade(
  71                                                 realizedFlow.getModuleNameVersion());
  72
  73                         // START FLOW
  74                         processThread.getExecutionModulesManager().execute(realizedFlow);
  75                         // END FLOW
  76                 } catch (Exception e) {
  77                         // TODO: re-throw exception ?
  78                         String msg = "Execution of flow " + flowName + " failed.";
  79                         log.error(msg, e);
  80                         dispatchAddStep(new ExecutionStep(realizedFlow.getModuleName(),
  81                                         ExecutionStep.ERROR, msg + " " + e.getMessage()));
  82                         processThread.notifyError();
  83                 } finally {
  84                         processThread.flowCompleted();
  85                         dispatchAddStep(new ExecutionStep(realizedFlow.getModuleName(),
  86                                         ExecutionStep.PHASE_END, "Flow " + flowName));
  87                 }
  88         }
  89
  90         private void dispatchAddStep(ExecutionStep step) {
  91                 processThread.getProcessThreadGroup().dispatchAddStep(step);
  92         }
  93
  94         protected ProcessThreadGroup getProcessThreadGroup() {
  95                 return processThread.getProcessThreadGroup();
  96         }
  97
  98         public RealizedFlow getRealizedFlow() {
  99                 return realizedFlow;
 100         }
 101
 102 }