eclipse/plugins/org.argeo.slc.client.ui/src/main/java/org/argeo/slc/client/ui/controllers/ProcessController.java

   1 package org.argeo.slc.client.ui.controllers;
   2
   3 import java.util.HashMap;
   4 import java.util.Map;
   5
   6 import javax.jcr.Node;
   7 import javax.jcr.NodeIterator;
   8 import javax.jcr.Property;
   9
  10 import org.apache.commons.logging.Log;
  11 import org.apache.commons.logging.LogFactory;
  12 import org.argeo.slc.SlcException;
  13 import org.argeo.slc.execution.ExecutionProcess;
  14 import org.argeo.slc.jcr.SlcJcrConstants;
  15 import org.argeo.slc.jcr.SlcJcrUtils;
  16 import org.argeo.slc.jcr.SlcNames;
  17 import org.argeo.slc.jcr.execution.JcrExecutionProcess;
  18 import org.argeo.slc.process.SlcExecution;
  19 import org.argeo.slc.runtime.SlcAgent;
  20 import org.argeo.slc.runtime.SlcAgentFactory;
  21 import org.argeo.slc.services.SlcExecutionService;
  22
  23 /**
  24  * We use a separate class (not in UI components) so that it can be a singleton
  25  * in an application context.
  26  */
  27 public class ProcessController {
  28         private final static Log log = LogFactory.getLog(ProcessController.class);
  29         private SlcExecutionService slcExecutionService;
  30         private Map<String, SlcAgentFactory> agentFactories = new HashMap<String, SlcAgentFactory>();
  31
  32         public void execute(SlcAgent agent, SlcExecution slcExecution) {
  33                 slcExecutionService.newExecution(slcExecution);
  34                 agent.process(slcExecution);
  35                 if (log.isDebugEnabled())
  36                         log.debug("SlcExecution " + slcExecution.getUuid()
  37                                         + " launched on Agent " + agent.toString());
  38         }
  39
  40         public void process(Node processNode) {
  41                 JcrExecutionProcess process = new JcrExecutionProcess(processNode);
  42                 try {
  43                         // we currently only deal with single agents
  44                         Node realizedFlowNode = processNode.getNode(SlcNames.SLC_FLOW);
  45                         NodeIterator nit = realizedFlowNode.getNodes();
  46                         if (nit.hasNext()) {
  47                                 // TODO find a better way to determine which agent to use
  48                                 // currently we check the agent of the first registered flow
  49                                 Node firstRealizedFlow = nit.nextNode();
  50                                 // we assume there is an nt:address
  51                                 String firstFlowPath = firstRealizedFlow
  52                                                 .getNode(SlcNames.SLC_ADDRESS)
  53                                                 .getProperty(Property.JCR_PATH).getString();
  54                                 Node flowNode = processNode.getSession().getNode(firstFlowPath);
  55                                 String agentFactoryPath = SlcJcrUtils
  56                                                 .flowAgentFactoryPath(firstFlowPath);
  57                                 if (!agentFactories.containsKey(agentFactoryPath))
  58                                         throw new SlcException("No agent factory registered under "
  59                                                         + agentFactoryPath);
  60                                 SlcAgentFactory agentFactory = agentFactories
  61                                                 .get(agentFactoryPath);
  62                                 Node agentNode = ((Node) flowNode
  63                                                 .getAncestor(SlcJcrUtils.AGENT_FACTORY_DEPTH + 1));
  64                                 String agentUuid = agentNode.getProperty(SlcNames.SLC_UUID)
  65                                                 .getString();
  66
  67                                 // process
  68                                 SlcAgent slcAgent = agentFactory.getAgent(agentUuid);
  69                                 slcAgent.process(process);
  70                         }
  71                 } catch (Exception e) {
  72                         if (!process.getStatus().equals(ExecutionProcess.ERROR))
  73                                 process.setStatus(ExecutionProcess.ERROR);
  74                         throw new SlcException("Cannot execute " + processNode, e);
  75                 }
  76         }
  77
  78         public void setSlcExecutionService(SlcExecutionService slcExecutionService) {
  79                 this.slcExecutionService = slcExecutionService;
  80         }
  81
  82         public synchronized void register(SlcAgentFactory agentFactory,
  83                         Map<String, String> properties) {
  84                 String path = properties.get(SlcJcrConstants.PROPERTY_PATH);
  85                 if (log.isDebugEnabled())
  86                         log.debug("Agent factory registered under " + path);
  87                 agentFactories.put(path, agentFactory);
  88         }
  89
  90         public synchronized void unregister(SlcAgentFactory agentFactory,
  91                         Map<String, String> properties) {
  92                 String path = properties.get(SlcJcrConstants.PROPERTY_PATH);
  93                 if (log.isDebugEnabled())
  94                         log.debug("Agent factory unregistered from " + path);
  95                 agentFactories.remove(path);
  96         }
  97 }