Examples of org.openbp.server.persistence.PersistenceContext

org.openbp.server.persistence.PersistenceContext
Context object that contains information regarding access to a persistence store. The implementation of this object depends on the type of persistence store. For example, it can encapsulate a JDBC connection or an O/R mapper session. This object should be rather lightweight than heavyweight. @author Heiko Erhardt

      if (processor.getSourceMgrType().equalsIgnoreCase(processor.getTargetMgrType()))
      {
        printError("Source and target model manager classes may not be identical.");
      }


      PersistenceContext pc = processor.getProcessServer().getEngine().getPersistenceContextProvider().obtainPersistenceContext();
      TransactionGuard tg = new TransactionGuard(pc);
      try
      {
        processor.perform();
      }

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   * @param context Token context to associate with the workflow task @return
   * The new workflow task
   */
  public WorkflowTask createWorkflowTask(final TokenContext context)
  {
    PersistenceContext pc = getPersistenceContextProvider().obtainPersistenceContext();
    WorkflowTask workflowTask = (WorkflowTask) pc.createEntity(WorkflowTask.class);


    // Link workflow task and context
    workflowTask.setTokenContext(context);


    return workflowTask;

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    {
      PersistentObjectReference por = (PersistentObjectReference) ret;
      Object id = por.getObjectId();
      Class cls = ReflectUtil.loadClass(por.getClassName());


      PersistenceContext pc = pcp.obtainPersistenceContext();
      if (pc == null)
      {
        String msg = LogUtil.error(PersistenceContextObjectSerializer.class, "Error obtaining persistence context for deserialization of a persistent object of type $0 (id: $1, variable: $2). [{3}]", cls.getName(), id, key, context);
        throw new EngineException("ContextDeserialization", msg);
      }


      Object loaded = pc.findById(id, cls);
      if (loaded == null)
      {
        String msg = LogUtil.error(PersistenceContextObjectSerializer.class, "Persistent object of type $0 not found when deserializing token (id: $1, variable: $2). [{3}]", cls.getName(), id, key, context);
        throw new EngineException("ContextDeserialization", msg);
      }

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            }


            try
            {
              // Retrieve the bean according to the given id value
              PersistenceContext pc = persistenceContextProvider.obtainPersistenceContext();
              value = pc.findById(value, targetType.getJavaClass());
            }
            catch (Exception e)
            {
              throw newError("AutoRetrieval", "Auto-retrieval of bean of expression '" + ExpressionConstants.REFERENCE_KEY_OPERATOR + "" + ident + "' by id value '" + value + "' failed.", e, sp);
            }

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   * The shutdown method releases the persistence context.
   */
  @Override
  public void shutdown()
  {
    PersistenceContext pc = getExistingPersistenceContext();
    if (pc != null)
    {
      pc.release();
    }
    getPersistenceContextProvider().shutdown();
  }

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  /**
   * Rolls back the recent changes (if supported).
   */
  public void rollback()
  {
    PersistenceContext pc = getPersistenceContext();
    pc.rollbackTransaction();
    pc.release();
  }

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  /**
   * Clears any this token context service might have.
   */
  public void clearCache()
  {
    PersistenceContext pc = getExistingPersistenceContext();
    if (pc != null)
    {
      pc.release();
    }
  }

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    else
    {
      LogUtil.debug(getClass(), "Performing token query (all tokens).");
    }


    PersistenceContext pc = getPersistenceContext();
    PersistenceQuery query = pc.createQuery(TokenContext.class);


    if (criteria != null)
    {
      configureCriterion(query, criteria);
    }


    Iterator it = pc.runQuery(query);
    return new ContextIterator(it);
  }

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   */
  @Transactional(propagation = Propagation.SUPPORTS, readOnly = true)
  public Iterator getExecutableContexts(int maxResults)
  {
    LogUtil.debug(getClass(), "Performing query for executable tokens.");
    PersistenceContext pc = getPersistenceContext();


    // Construct search search criterion for executable token contexts;
    // don't cache this, depends on current session.
    PersistenceQuery query = pc.createQuery(TokenContext.class);
    query.eq("lifecycleRequest", new Integer(LifecycleRequest.RESUME));
    query.neq("lifecycleState", new Integer(LifecycleState.SELECTED));
    query.addOrdering("priority");


    int max = maxResults;
    if (getIsolationLevel() == ISOLATION_LEVEL_SINGLE)
    {
      max = 1;
    }
    if (max > 0)
    {
      query.setMaxResults(max);
    }


    // TODO Fix 2 A 'select for update' might be advisable; we won't need to refresh the context then...
    Iterator it = pc.runQuery(query);
    return new ExecutableContextIterator(it);
  }

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   */
  @Transactional(propagation = Propagation.SUPPORTS, readOnly = true)
  public Iterator getworkflowTasks(final WorkflowTaskCriteria criteria)
  {
    LogUtil.debug(getClass(), "Performing workflow task query $0.", criteria);
    PersistenceContext pc = getPersistenceContext();
    PersistenceQuery query = pc.createQuery(WorkflowTask.class);


    if (criteria != null)
    {
      configureCriterion(query, criteria);
    }


    Iterator it = pc.runQuery(query);
    return it;
  }

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org.openbp.model.system.activity.SaveObjectActivity

org.openbp.server.context.PersistentTokenContextService

org.openbp.server.context.serializer.PersistenceContextObjectSerializer

org.openbp.server.context.TokenContextServiceBase

org.openbp.server.engine.script.ExpressionParser

org.openbp.server.model.modelmgr.DatabaseModelMgr

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