Examples of de.danet.an.workflow.api.Channel

de.danet.an.workflow.api.Channel
This interface defines a named connection with a process that can be used to receive messages from activities and send messages to activities.
Note that messages sent from the workflow engine to clients on a channel may be lost when no client has opened the channel. @author Michael Lipp @version $Revision: 2231 $

     * Test.
     */
    public void receiveMessage() throws Exception {
  ProcessDefinitionDirectory procDefDir = null;
  ProcessDirectory procDir = null;
        Channel chan = null;
  try {
      procDefDir = workflowService.processDefinitionDirectory();
      procDir = workflowService.processDirectory();
      ProcessMgr pmgr = procDefDir.processMgr
    ("chabacc", "chabacc_test_sender");
      WfProcess process 
    = pmgr.createProcess(new DefaultRequester (workflowService));
      chan = workflowService.getChannel(process, "test_channel");
      WfActivity sleepAct = null;
      for (Iterator i = process.steps().iterator(); i.hasNext();) {
    sleepAct = (WfActivity)i.next ();
    if (sleepAct.name().equals("Wait")) {
        break;
    }
      }
      process.start();
      assertTrue (stateReached (sleepAct, "open.running"));
      Map pd = chan.receiveMessage();
      assertTrue ("Hello world!".equals(pd.get("message")));
      assertTrue (stateReached (process, "closed.completed"));
      procDir.removeProcess(process);
  } finally {
            workflowService.release (chan);

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     * Test.
     */
    public void sendMessageAfter() throws Exception {
  ProcessDefinitionDirectory procDefDir = null;
  ProcessDirectory procDir = null;
        Channel chan = null;
  try {
      procDefDir = workflowService.processDefinitionDirectory();
      procDir = workflowService.processDirectory();
      ProcessMgr pmgr = procDefDir.processMgr
    ("chabacc", "chabacc_test_receiver");
      WfProcess process 
    = pmgr.createProcess(new DefaultRequester (workflowService));
      chan = workflowService.getChannel(process, "test_channel");
      WfActivity recAct = null;
      for (Iterator i = process.steps().iterator(); i.hasNext();) {
    recAct = (WfActivity)i.next ();
    if (recAct.name().equals("Receive")) {
        break;
    }
      }
      assertTrue (recAct != null);
      process.start();
      assertTrue (stateReached (recAct, "open.running"));
      Thread.sleep (500);
      Map pd = new HashMap ();
      pd.put ("message", "Hello world!");
      chan.sendMessage(pd);
      assertTrue (stateReached (recAct, "closed.completed"));
      pd = process.processContext();
      assertTrue ("Hello world!".equals(pd.get("lastMessage")));
      assertTrue (stateReached (process, "closed.completed"));
      procDir.removeProcess(process);

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     * Test.
     */
    public void sendMessageBefore() throws Exception {
  ProcessDefinitionDirectory procDefDir = null;
  ProcessDirectory procDir = null;
        Channel chan = null;
  try {
      procDefDir = workflowService.processDefinitionDirectory();
      procDir = workflowService.processDirectory();
      ProcessMgr pmgr = procDefDir.processMgr
    ("chabacc", "chabacc_test_receiver");
      WfProcess process 
    = pmgr.createProcess(new DefaultRequester (workflowService));
      chan = workflowService.getChannel(process, "test_channel");
      Map pd = new HashMap ();
      pd.put ("message", "Hello world!");
      chan.sendMessage(pd);
      Thread.sleep (500);
      process.start();
      assertTrue (stateReached (process, "closed.completed"));
      pd = process.processContext();
      assertTrue ("Hello world!".equals(pd.get("lastMessage")));

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     * Test.
     */
    public void sendXMLMessage() throws Exception {
  ProcessDefinitionDirectory procDefDir = null;
  ProcessDirectory procDir = null;
        Channel chan = null;
  try {
      procDefDir = workflowService.processDefinitionDirectory();
      procDir = workflowService.processDirectory();
      ProcessMgr pmgr = procDefDir.processMgr
    ("chabacc", "chabacc_test_xml_receiver");
      WfProcess process 
    = pmgr.createProcess(new DefaultRequester (workflowService));
      chan = workflowService.getChannel(process, "test_channel");
      DocumentBuilderFactory df = DocumentBuilderFactory.newInstance ();
      Document doc = df.newDocumentBuilder ().newDocument ();
      DocumentFragment frag = doc.createDocumentFragment ();
      frag.appendChild(doc.createElement ("root"));
            TransformerFactory tf = TransformerFactory.newInstance();
            Transformer t = tf.newTransformer ();
            SAXEventBufferImpl b = new SAXEventBufferImpl ();
            t.transform (new DOMSource (frag), new SAXResult(b));
            b.pack();
      Map pd = new HashMap ();
      pd.put ("message", b);
      chan.sendMessage(pd);
      Thread.sleep (500);
      process.start();
      assertTrue (stateReached (process, "closed.completed"));
            pd = process.processContext();
            Object o = pd.get("lastXMLMessage");

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     * Test.
     */
    public void echo() throws Exception {
  ProcessDefinitionDirectory procDefDir = null;
  ProcessDirectory procDir = null;
        Channel chan = null;
  try {
      procDefDir = workflowService.processDefinitionDirectory();
      procDir = workflowService.processDirectory();
      ProcessMgr pmgr = procDefDir.processMgr
    ("chabacc", "chabacc_test_rec_send");
      WfProcess process 
    = pmgr.createProcess(new DefaultRequester (workflowService));
      chan = workflowService.getChannel(process, "test_channel");
      Map pd = new HashMap ();
      pd.put ("message", "Do you echo?");
      chan.sendMessage(pd);
      process.start();
      pd = chan.receiveMessage();
      assertTrue ("Got: " + pd.get("message"), 
      "Do you echo?".equals(pd.get("message")));
      assertTrue (stateReached (process, "closed.completed"));
      procDir.removeProcess(process);
  } finally {

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     * Test.
     */
    public void echoIndirect() throws Exception {
  ProcessDefinitionDirectory procDefDir = null;
  ProcessDirectory procDir = null;
        Channel chan = null;
  try {
      procDefDir = workflowService.processDefinitionDirectory();
      procDir = workflowService.processDirectory();
      ProcessMgr pmgr = procDefDir.processMgr
    ("chabacc", "chabacc_test_rec_send_indirect");
      WfProcess process 
    = pmgr.createProcess(new DefaultRequester (workflowService));
      chan = workflowService.getChannel(process, "test_channel");
      Map pd = new HashMap ();
      pd.put ("message", "Do you echo?");
      chan.sendMessage(pd);
      process.start();
      pd = chan.receiveMessage();
      assertTrue ("Got: " + pd.get("message"), 
      "Do you echo?".equals(pd.get("message")));
      assertTrue (stateReached (process, "closed.completed"));
      pd = process.processContext();
      assertTrue (pd.get("feedback").equals ("Got message"));

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     * Test.
     */
    public void closeNotification() throws Exception {
  ProcessDefinitionDirectory procDefDir = null;
  ProcessDirectory procDir = null;
        Channel chan = null;
  try {
      procDefDir = workflowService.processDefinitionDirectory();
      procDir = workflowService.processDirectory();
      ProcessMgr pmgr = procDefDir.processMgr
    ("chabacc", "chabacc_test_close_notification");
      WfProcess process 
    = pmgr.createProcess(new DefaultRequester (workflowService));
      chan = workflowService.getChannel(process, "test_channel");
      process.start();
      Map pd = chan.receiveMessage();
      assertTrue (pd == null);
      assertTrue (stateReached (process, "closed.completed"));
      procDir.removeProcess(process);
  } finally {
            workflowService.release(chan);

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      response.sendError
    (HttpServletResponse.SC_INTERNAL_SERVER_ERROR, 
     "Unable to retrieve workflow service");
      return;
  }
  Channel channel = null;
  boolean invalidateSession = false;
  try {
      // Retrieve (or create) process
      ProcessLookup pl = lookupProcess
    (session, packageID, processID,

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     "Unable to retrieve workflow service");
      return;
  }


  // Create new process
  Channel channel = null;
  try {
      ProcessData sendData = new DefaultProcessData();
      // Create new process
      ProcessLookup pl = lookupProcess
    (null, packageID, processID, sendData, null, null);

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        throws InvalidKeyException, NotEnabledException, 
            InvalidRequesterException, RequesterRequiredException, 
            CannotStartException, AlreadyRunningException, 
            CannotRemoveException {
        WorkflowService workflowService = null;
        Channel chan = null;
        try {
            WorkflowServiceFactory wsf = WorkflowServiceFactory.newInstance();
            workflowService = wsf.newWorkflowService();
        
            ProcessDefinitionDirectory procDefDir 
                = workflowService.processDefinitionDirectory();
            ProcessDirectory procDir = workflowService.processDirectory();
            ProcessMgr pmgr = procDefDir.processMgr
                ("chabacc", "chabacc_test_sender");
            WfProcess process 
                = pmgr.createProcess(new DefaultRequester (workflowService));
            chan = workflowService.getChannel(process, "test_channel");
            process.start();
            Map pd = chan.receiveMessage();
            return pd;
        } catch (RemoteException e) {
            throw new EJBException (e);
        } finally {
            workflowService.release(chan);

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