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

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   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.client.ui.controllers;
  17
  18 import javax.jcr.Node;
  19 import javax.jcr.RepositoryException;
  20
  21 import org.argeo.slc.SlcException;
  22 import org.argeo.slc.execution.ExecutionProcess;
  23 import org.argeo.slc.execution.SlcAgent;
  24 import org.argeo.slc.jcr.execution.JcrExecutionProcess;
  25
  26 /**
  27  * We use a separate class (not in UI components) so that it can be a singleton
  28  * in an application context.
  29  */
  30 public class ProcessController {
  31         // private final static Log log =
  32         // LogFactory.getLog(ProcessController.class);
  33         // private Map<String, SlcAgentFactory> agentFactories = new HashMap<String,
  34         // SlcAgentFactory>();
  35
  36         private SlcAgent agent;
  37
  38         public ExecutionProcess process(Node processNode) {
  39                 JcrExecutionProcess process = new JcrExecutionProcess(processNode);
  40                 try {
  41                         SlcAgent slcAgent = findAgent(processNode);
  42                         if (slcAgent == null)
  43                                 throw new SlcException("Cannot find agent for " + processNode);
  44                         slcAgent.process(process);
  45                         return process;
  46                 } catch (Exception e) {
  47                         if (!process.getStatus().equals(ExecutionProcess.ERROR))
  48                                 process.setStatus(ExecutionProcess.ERROR);
  49                         throw new SlcException("Cannot execute " + processNode, e);
  50                 }
  51         }
  52
  53         public void kill(Node processNode) {
  54                 JcrExecutionProcess process = new JcrExecutionProcess(processNode);
  55                 try {
  56                         SlcAgent slcAgent = findAgent(processNode);
  57                         if (slcAgent == null)
  58                                 throw new SlcException("Cannot find agent for " + processNode);
  59                         slcAgent.kill(process.getUuid());
  60                 } catch (Exception e) {
  61                         if (!process.getStatus().equals(ExecutionProcess.ERROR))
  62                                 process.setStatus(ExecutionProcess.ERROR);
  63                         throw new SlcException("Cannot execute " + processNode, e);
  64                 }
  65         }
  66
  67         /** Always return the default runtime agent */
  68         protected SlcAgent findAgent(Node processNode) throws RepositoryException {
  69                 // we currently only deal with single agents
  70                 // Node realizedFlowNode = processNode.getNode(SlcNames.SLC_FLOW);
  71                 // NodeIterator nit = realizedFlowNode.getNodes();
  72                 // if (nit.hasNext()) {
  73                 // // TODO find a better way to determine which agent to use
  74                 // // currently we check the agent of the first registered flow
  75                 // Node firstRealizedFlow = nit.nextNode();
  76                 // // we assume there is an nt:address
  77                 // String firstFlowPath = firstRealizedFlow
  78                 // .getNode(SlcNames.SLC_ADDRESS)
  79                 // .getProperty(Property.JCR_PATH).getString();
  80                 // Node flowNode = processNode.getSession().getNode(firstFlowPath);
  81                 // String agentFactoryPath = SlcJcrUtils
  82                 // .flowAgentFactoryPath(firstFlowPath);
  83                 // if (!agentFactories.containsKey(agentFactoryPath))
  84                 // throw new SlcException("No agent factory registered under "
  85                 // + agentFactoryPath);
  86                 // SlcAgentFactory agentFactory = agentFactories.get(agentFactoryPath);
  87                 // Node agentNode = ((Node) flowNode
  88                 // .getAncestor(SlcJcrUtils.AGENT_FACTORY_DEPTH + 1));
  89                 // String agentUuid = agentNode.getProperty(SlcNames.SLC_UUID)
  90                 // .getString();
  91                 //
  92                 // // process
  93                 // return agentFactory.getAgent(agentUuid);
  94                 // }
  95
  96                 return agent;
  97         }
  98
  99         public void setAgent(SlcAgent agent) {
 100                 this.agent = agent;
 101         }
 102
 103         // public synchronized void register(SlcAgentFactory agentFactory,
 104         // Map<String, String> properties) {
 105         // String path = properties.get(SlcJcrConstants.PROPERTY_PATH);
 106         // if (log.isDebugEnabled())
 107         // log.debug("Agent factory registered under " + path);
 108         // agentFactories.put(path, agentFactory);
 109         // }
 110         //
 111         // public synchronized void unregister(SlcAgentFactory agentFactory,
 112         // Map<String, String> properties) {
 113         // String path = properties.get(SlcJcrConstants.PROPERTY_PATH);
 114         // if (log.isDebugEnabled())
 115         // log.debug("Agent factory unregistered from " + path);
 116         // agentFactories.remove(path);
 117         // }
 118 }