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