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

   1 package org.argeo.slc.core.execution;
   2
   3 import java.util.ArrayList;
   4 import java.util.Iterator;
   5 import java.util.List;
   6
   7 import org.apache.commons.logging.Log;
   8 import org.apache.commons.logging.LogFactory;
   9 import org.argeo.slc.execution.ExecutionFlowDescriptor;
  10 import org.argeo.slc.process.RealizedFlow;
  11 import org.argeo.slc.process.SlcExecution;
  12 import org.argeo.slc.process.SlcExecutionNotifier;
  13 import org.argeo.slc.process.SlcExecutionStep;
  14
  15 /** Thread of a single execution */
  16 public class ExecutionThread extends Thread {
  17         private final static Log log = LogFactory.getLog(ExecutionThread.class);
  18
  19         private final RealizedFlow realizedFlow;
  20         private final ProcessThread processThread;
  21
  22         public ExecutionThread(ProcessThread processThread,
  23                         RealizedFlow realizedFlow) {
  24                 super(processThread.getProcessThreadGroup(), "Flow "
  25                                 + realizedFlow.getFlowDescriptor().getName());
  26                 this.realizedFlow = realizedFlow;
  27                 this.processThread = processThread;
  28         }
  29
  30         public void run() {
  31                 if (getContextClassLoader() != null) {
  32                         if (log.isTraceEnabled())
  33                                 log.debug("Context class loader set to "
  34                                                 + getContextClassLoader());
  35                 }
  36
  37                 // Retrieve execution flow descriptor
  38                 ExecutionFlowDescriptor executionFlowDescriptor = realizedFlow
  39                                 .getFlowDescriptor();
  40                 String flowName = executionFlowDescriptor.getName();
  41
  42                 dispatchAddStep(processThread.getSlcProcess(), new SlcExecutionStep(
  43                                 SlcExecutionStep.TYPE_PHASE_START, "Flow " + flowName));
  44
  45                 try {
  46                         processThread.getExecutionModulesManager().execute(realizedFlow);
  47                 } catch (Exception e) {
  48                         // TODO: re-throw exception ?
  49                         String msg = "Execution of flow " + flowName + " failed.";
  50                         log.error(msg, e);
  51                         dispatchAddStep(processThread.getSlcProcess(),
  52                                         new SlcExecutionStep(msg + " " + e.getMessage()));
  53                         processThread.notifyError();
  54                 } finally {
  55                         processThread.flowCompleted();
  56                         dispatchAddStep(processThread.getSlcProcess(),
  57                                         new SlcExecutionStep(SlcExecutionStep.TYPE_PHASE_END,
  58                                                         "Flow " + flowName));
  59                 }
  60         }
  61
  62         protected void dispatchAddStep(SlcExecution slcExecution,
  63                         SlcExecutionStep step) {
  64                 slcExecution.getSteps().add(step);
  65                 List<SlcExecutionStep> steps = new ArrayList<SlcExecutionStep>();
  66                 steps.add(step);
  67                 for (Iterator<SlcExecutionNotifier> it = processThread
  68                                 .getExecutionModulesManager().getSlcExecutionNotifiers()
  69                                 .iterator(); it.hasNext();) {
  70                         it.next().addSteps(slcExecution, steps);
  71                 }
  72         }
  73 }