runtime/org.argeo.slc.server/src/main/java/org/argeo/slc/web/mvc/process/NewSlcExecutionController.java

   1 package org.argeo.slc.web.mvc.process;
   2
   3 import java.io.BufferedReader;
   4 import java.io.ByteArrayInputStream;
   5 import java.io.InputStream;
   6 import java.util.UUID;
   7
   8 import javax.servlet.http.HttpServletRequest;
   9 import javax.servlet.http.HttpServletResponse;
  10
  11 import org.apache.commons.io.IOUtils;
  12 import org.apache.commons.logging.Log;
  13 import org.apache.commons.logging.LogFactory;
  14 import org.argeo.slc.core.attachment.Attachment;
  15 import org.argeo.slc.core.attachment.AttachmentsStorage;
  16 import org.argeo.slc.core.attachment.SimpleAttachment;
  17 import org.argeo.slc.msg.MsgConstants;
  18 import org.argeo.slc.msg.ObjectList;
  19 import org.argeo.slc.process.SlcExecution;
  20 import org.argeo.slc.process.SlcExecutionStep;
  21 import org.argeo.slc.runtime.SlcAgent;
  22 import org.argeo.slc.runtime.SlcAgentFactory;
  23 import org.argeo.slc.services.SlcExecutionService;
  24 import org.argeo.slc.web.mvc.AbstractServiceController;
  25 import org.springframework.oxm.Marshaller;
  26 import org.springframework.oxm.Unmarshaller;
  27 import org.springframework.util.Assert;
  28 import org.springframework.web.servlet.ModelAndView;
  29 import org.springframework.xml.transform.StringResult;
  30 import org.springframework.xml.transform.StringSource;
  31
  32 /** Send a new SlcExecution. */
  33 public class NewSlcExecutionController extends AbstractServiceController {
  34         private final static Log log = LogFactory
  35                         .getLog(NewSlcExecutionController.class);
  36
  37         private SlcAgentFactory agentFactory;
  38         private Unmarshaller unmarshaller;
  39         private Marshaller marshaller;
  40         private SlcExecutionService slcExecutionService;
  41
  42         private AttachmentsStorage attachmentsStorage;
  43
  44         @Override
  45         protected void handleServiceRequest(HttpServletRequest request,
  46                         HttpServletResponse response, ModelAndView modelAndView)
  47                         throws Exception {
  48
  49                 if (log.isTraceEnabled()) {
  50                         log.debug("Content-Type: " + request.getContentType());
  51                         log.debug("Content-Length: " + request.getContentLength());
  52                 }
  53
  54                 String agentId = request
  55                                 .getParameter(MsgConstants.PROPERTY_SLC_AGENT_ID);
  56                 Assert.notNull(agentId, "agent id");
  57
  58                 String answer = request.getParameter("body");
  59                 if (answer == null) {
  60                         // lets read the message body instead
  61                         BufferedReader reader = request.getReader();
  62                         StringBuffer buffer = new StringBuffer();
  63                         String line = null;
  64                         while (((line = reader.readLine()) != null)) {
  65                                 buffer.append(line);
  66                         }
  67                         answer = buffer.toString();
  68                 }
  69
  70                 if (log.isTraceEnabled())
  71                         log.debug("Received message:\n" + answer);
  72
  73                 StringSource source = new StringSource(answer);
  74                 SlcExecution slcExecution = (SlcExecution) unmarshaller
  75                                 .unmarshal(source);
  76
  77                 // Workaround for https://www.argeo.org/bugzilla/show_bug.cgi?id=86
  78                 if (slcExecution.getUuid() == null
  79                                 || slcExecution.getUuid().length() < 8)
  80                         slcExecution.setUuid(UUID.randomUUID().toString());
  81
  82                 slcExecution.setStatus(SlcExecution.STATUS_SCHEDULED);
  83                 slcExecution.getSteps().add(
  84                                 new SlcExecutionStep(SlcExecutionStep.TYPE_START,
  85                                                 "Process started from the Web UI"));
  86
  87                 // ObjectList ol = new ObjectList(slcExecution.getRealizedFlows());
  88                 // StringResult result = new StringResult();
  89                 // marshaller.marshal(ol, result);
  90                 // slcExecution.setRealizedFlowsXml(result.toString());
  91                 storeRealizedFlows(slcExecution);
  92
  93                 slcExecutionService.newExecution(slcExecution);
  94
  95                 SlcAgent agent = agentFactory.getAgent(agentId);
  96                 agent.runSlcExecution(slcExecution);
  97         }
  98
  99         protected void storeRealizedFlows(SlcExecution slcExecution) {
 100                 Attachment attachment = realizedFlowsAttachment(UUID.randomUUID()
 101                                 .toString(), slcExecution);
 102                 InputStream in = null;
 103                 try {
 104
 105                         ObjectList ol = new ObjectList(slcExecution.getRealizedFlows());
 106                         StringResult result = new StringResult();
 107                         marshaller.marshal(ol, result);
 108
 109                         in = new ByteArrayInputStream(result.toString().getBytes());
 110                         attachmentsStorage.storeAttachment(attachment, in);
 111
 112                         slcExecution.setRealizedFlowsXml(attachment.getUuid());
 113
 114                 } catch (Exception e) {
 115                         log.error("Could not store realized flows as attachment #"
 116                                         + attachment.getUuid(), e);
 117                 } finally {
 118                         IOUtils.closeQuietly(in);
 119                 }
 120         }
 121
 122         public void setUnmarshaller(Unmarshaller unmarshaller) {
 123                 this.unmarshaller = unmarshaller;
 124         }
 125
 126         public void setAgentFactory(SlcAgentFactory agentFactory) {
 127                 this.agentFactory = agentFactory;
 128         }
 129
 130         public void setSlcExecutionService(SlcExecutionService slcExecutionService) {
 131                 this.slcExecutionService = slcExecutionService;
 132         }
 133
 134         public void setMarshaller(Marshaller marshaller) {
 135                 this.marshaller = marshaller;
 136         }
 137
 138         public void setAttachmentsStorage(AttachmentsStorage attachmentsStorage) {
 139                 this.attachmentsStorage = attachmentsStorage;
 140         }
 141
 142         /** Unify labelling in the package */
 143         static Attachment realizedFlowsAttachment(String attachmentUuid,
 144                         SlcExecution slcExecution) {
 145                 return new SimpleAttachment(attachmentUuid,
 146                                 "RealizedFlows of SlcExecution #" + slcExecution.getUuid(),
 147                                 "text/xml");
 148         }
 149 }