SlcExecutionManager.java

   1 /*
   2  * Copyright (C) 2010 Mathieu Baudier <mbaudier@argeo.org>
   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
  17 package org.argeo.slc.web.mvc.process;
  18
  19 import java.io.BufferedReader;
  20 import java.io.ByteArrayInputStream;
  21 import java.io.ByteArrayOutputStream;
  22 import java.io.InputStream;
  23 import java.util.UUID;
  24
  25 import javax.servlet.http.HttpServletRequest;
  26 import javax.servlet.http.HttpServletResponse;
  27 import javax.xml.transform.stream.StreamSource;
  28
  29 import org.apache.commons.io.IOUtils;
  30 import org.apache.commons.logging.Log;
  31 import org.apache.commons.logging.LogFactory;
  32 import org.argeo.slc.core.attachment.Attachment;
  33 import org.argeo.slc.core.attachment.AttachmentsStorage;
  34 import org.argeo.slc.core.attachment.SimpleAttachment;
  35 import org.argeo.slc.msg.MsgConstants;
  36 import org.argeo.slc.msg.ObjectList;
  37 import org.argeo.slc.process.SlcExecution;
  38 import org.argeo.slc.process.SlcExecutionStep;
  39 import org.argeo.slc.runtime.SlcAgent;
  40 import org.argeo.slc.runtime.SlcAgentFactory;
  41 import org.argeo.slc.services.SlcExecutionService;
  42 import org.argeo.slc.web.mvc.AbstractServiceController;
  43 import org.springframework.oxm.Marshaller;
  44 import org.springframework.oxm.Unmarshaller;
  45 import org.springframework.util.Assert;
  46 import org.springframework.web.servlet.ModelAndView;
  47 import org.springframework.xml.transform.StringResult;
  48 import org.springframework.xml.transform.StringSource;
  49
  50 public class SlcExecutionManager {
  51         private final static Log log = LogFactory
  52                         .getLog(SlcExecutionManager.class);
  53
  54         private SlcAgentFactory agentFactory;
  55         private Unmarshaller unmarshaller;
  56         private Marshaller marshaller;
  57         private SlcExecutionService slcExecutionService;
  58         private AttachmentsStorage attachmentsStorage;
  59
  60         public SlcExecutionManager(
  61                         SlcAgentFactory agentFactory,
  62                         Unmarshaller unmarshaller,
  63                         Marshaller marshaller,
  64                         SlcExecutionService slcExecutionService,
  65                         AttachmentsStorage attachmentsStorage){
  66
  67         this.agentFactory = agentFactory;
  68         this.unmarshaller = unmarshaller;
  69         this.marshaller = marshaller;
  70         this.slcExecutionService = slcExecutionService;
  71         this.attachmentsStorage = attachmentsStorage;
  72         }
  73
  74
  75         protected void storeRealizedFlows(SlcExecution slcExecution) {
  76
  77                 Attachment attachment = realizedFlowsAttachment(UUID.randomUUID()
  78                                 .toString(), slcExecution);
  79                 InputStream in = null;
  80                 try {
  81                         ObjectList ol = new ObjectList(slcExecution.getRealizedFlows());
  82                         StringResult result = new StringResult();
  83                         marshaller.marshal(ol, result);
  84                         in = new ByteArrayInputStream(result.toString().getBytes());
  85                         attachmentsStorage.storeAttachment(attachment, in);
  86
  87                         slcExecution.setRealizedFlowsXml(attachment.getUuid());
  88                 } catch (Exception e) {
  89                         log.error("Could not store realized flows as attachment #"
  90                                         + attachment.getUuid(), e);
  91                 } finally {
  92                         IOUtils.closeQuietly(in);
  93                 }
  94         }
  95
  96         protected void retrieveRealizedFlows(SlcExecution slcExecution) {
  97                 Attachment attachment = NewSlcExecutionController
  98                                 .realizedFlowsAttachment(slcExecution.getRealizedFlowsXml(),
  99                                                 slcExecution);
 100
 101                 ByteArrayOutputStream out = null;
 102                 ByteArrayInputStream in = null;
 103                 try {
 104                         // TODO: optimize with piped streams
 105                         out = new ByteArrayOutputStream();
 106                         attachmentsStorage.retrieveAttachment(attachment, out);
 107
 108                         byte[] arr = out.toByteArray();
 109                         in = new ByteArrayInputStream(arr);
 110                         StreamSource source = new StreamSource(in);
 111                         ObjectList ol = (ObjectList) unmarshaller.unmarshal(source);
 112                         ol.fill(slcExecution.getRealizedFlows());
 113                 } catch (Exception e) {
 114                         log.error("Could not retrieve realized flows from attachment #"
 115                                         + attachment.getUuid(), e);
 116                 } finally {
 117                         IOUtils.closeQuietly(in);
 118                         IOUtils.closeQuietly(out);
 119                 }
 120         }
 121
 122         /** Unify labeling in the package */
 123         static Attachment realizedFlowsAttachment(String attachmentUuid,
 124                         SlcExecution slcExecution) {
 125                 return new SimpleAttachment(attachmentUuid,
 126                                 "RealizedFlows of SlcExecution #" + slcExecution.getUuid(),
 127                                 "text/xml");
 128         }
 129 }