runtime/AbstractExecutionModulesManager.java

   1 package org.argeo.slc.runtime;
   2
   3 import java.util.Map;
   4
   5 import org.apache.commons.logging.Log;
   6 import org.apache.commons.logging.LogFactory;
   7 import org.argeo.slc.execution.ExecutionContext;
   8 import org.argeo.slc.execution.ExecutionFlow;
   9 import org.argeo.slc.execution.ExecutionFlowDescriptorConverter;
  10 import org.argeo.slc.execution.ExecutionModulesManager;
  11 import org.argeo.slc.execution.RealizedFlow;
  12
  13 /** Provides the base feature of an execution module manager. */
  14 public abstract class AbstractExecutionModulesManager implements
  15                 ExecutionModulesManager {
  16         private final static Log log = LogFactory
  17                         .getLog(AbstractExecutionModulesManager.class);
  18
  19         // private List<FilteredNotifier> filteredNotifiers = Collections
  20         // .synchronizedList(new ArrayList<FilteredNotifier>());
  21
  22         protected abstract ExecutionFlow findExecutionFlow(String moduleName,
  23                         String moduleVersion, String flowName);
  24
  25         protected abstract ExecutionContext findExecutionContext(String moduleName,
  26                         String moduleVersion);
  27
  28         protected abstract ExecutionFlowDescriptorConverter getExecutionFlowDescriptorConverter(
  29                         String moduleName, String moduleVersion);
  30
  31         public void execute(RealizedFlow realizedFlow) {
  32                 if (log.isTraceEnabled())
  33                         log.trace("Executing " + realizedFlow);
  34
  35                 String moduleName = realizedFlow.getModuleName();
  36                 String moduleVersion = realizedFlow.getModuleVersion();
  37
  38                 Map<? extends String, ? extends Object> variablesToAdd = getExecutionFlowDescriptorConverter(
  39                                 moduleName, moduleVersion).convertValues(
  40                                 realizedFlow.getFlowDescriptor());
  41                 ExecutionContext executionContext = findExecutionContext(moduleName,
  42                                 moduleVersion);
  43                 for (String key : variablesToAdd.keySet())
  44                         executionContext.setVariable(key, variablesToAdd.get(key));
  45
  46                 ExecutionFlow flow = findExecutionFlow(moduleName, moduleVersion,
  47                                 realizedFlow.getFlowDescriptor().getName());
  48
  49                 //
  50                 // Actually runs the flow, IN THIS THREAD
  51                 //
  52                 executionContext.beforeFlow(flow);
  53                 try {
  54                         flow.run();
  55                 } finally {
  56                         executionContext.afterFlow(flow);
  57                 }
  58                 //
  59                 //
  60                 //
  61         }
  62
  63         // public void dispatchUpdateStatus(ExecutionProcess process,
  64         // String oldStatus, String newStatus) {
  65         // // filtered notifiers
  66         // for (Iterator<FilteredNotifier> it = filteredNotifiers.iterator(); it
  67         // .hasNext();) {
  68         // FilteredNotifier filteredNotifier = it.next();
  69         // if (filteredNotifier.receiveFrom(process))
  70         // filteredNotifier.getNotifier().updateStatus(process, oldStatus,
  71         // newStatus);
  72         // }
  73         //
  74         // }
  75
  76         // public void dispatchAddSteps(ExecutionProcess process,
  77         // List<ExecutionStep> steps) {
  78         // process.addSteps(steps);
  79         // for (Iterator<FilteredNotifier> it = filteredNotifiers.iterator(); it
  80         // .hasNext();) {
  81         // FilteredNotifier filteredNotifier = it.next();
  82         // if (filteredNotifier.receiveFrom(process))
  83         // filteredNotifier.getNotifier().addSteps(process, steps);
  84         // }
  85         // }
  86
  87         // public void registerProcessNotifier(ExecutionProcessNotifier notifier,
  88         // Map<String, String> properties) {
  89         // filteredNotifiers.add(new FilteredNotifier(notifier, properties));
  90         // }
  91         //
  92         // public void unregisterProcessNotifier(ExecutionProcessNotifier notifier,
  93         // Map<String, String> properties) {
  94         // filteredNotifiers.remove(notifier);
  95         // }
  96
  97         // protected class FilteredNotifier {
  98         // private final ExecutionProcessNotifier notifier;
  99         // private final String processId;
 100         //
 101         // public FilteredNotifier(ExecutionProcessNotifier notifier,
 102         // Map<String, String> properties) {
 103         // super();
 104         // this.notifier = notifier;
 105         // if (properties == null)
 106         // properties = new HashMap<String, String>();
 107         // if (properties.containsKey(SLC_PROCESS_ID))
 108         // processId = properties.get(SLC_PROCESS_ID);
 109         // else
 110         // processId = null;
 111         // }
 112         //
 113         // /**
 114         // * Whether event from this process should be received by this listener.
 115         // */
 116         // public Boolean receiveFrom(ExecutionProcess process) {
 117         // if (processId != null)
 118         // if (process.getUuid().equals(processId))
 119         // return true;
 120         // else
 121         // return false;
 122         // return true;
 123         // }
 124         //
 125         // @Override
 126         // public int hashCode() {
 127         // return notifier.hashCode();
 128         // }
 129         //
 130         // @Override
 131         // public boolean equals(Object obj) {
 132         // if (obj instanceof FilteredNotifier) {
 133         // FilteredNotifier fn = (FilteredNotifier) obj;
 134         // return notifier.equals(fn.notifier);
 135         // } else if (obj instanceof ExecutionProcessNotifier) {
 136         // ExecutionProcessNotifier epn = (ExecutionProcessNotifier) obj;
 137         // return notifier.equals(epn);
 138         // } else
 139         // return false;
 140         // }
 141         //
 142         // public ExecutionProcessNotifier getNotifier() {
 143         // return notifier;
 144         // }
 145         //
 146         // }
 147 }