/// <summary>
/// Try to fulfill the request from cache, if a cache directory has been set.
/// If the request can be served from cache, the content stream is initialised for the cache source,
/// and the state is set to finished.
/// </summary>
/// <returns>True if the request could be served from the cache.</returns>
public bool TryCache()
{
try
{
#if VERBOSE
Log.Write(Log.Levels.Verbose, "DataRequest: trying to fulfill request for " + this.Source + " from cache");
Log.Write(Log.Levels.Verbose, "DataRequest: trying " + m_request.CacheLocation);
#endif
if (m_request.CacheCallback != null)
{
#if VERBOSE
Log.Write(Log.Levels.Verbose, "DataRequest: asking cache callback for file stream");
#endif
m_contentStream = m_request.CacheCallback(m_request); //new FileStream(m_request.CacheLocation, FileMode.Open);
if (m_contentStream != null)
{
m_state = DataRequestState.Finished;
m_cacheHit = true;
m_cacheHits++;
return(true);
}
}
return(false);
}
catch (IOException)
{
return(false);
}
}
public DataRequest(DataRequestDescriptor request)
{
m_lock = new Object();
m_request = request;
m_contentStream = null;
m_state = DataRequestState.Queued;
m_cacheHit = false;
m_headers = new NameValueCollection();
m_priority = 50;
m_totalRequests++;
m_nextTry = DateTime.Now;
}
public AboutFormSettings
(
[NameValue(AttributeNames.DEFAULTVALUE, "Title")]
[Comments("Header field on the form")]
string title,
[Comments("Includes the URL to retrieve the data.")]
RequestDetails requestDetails,
[Comments("Defines the state of the request including the sort, filter, page and page size.")]
DataRequestState state,
[Comments("List of fields and form groups for display.")]
List <DetailItem> fieldSettings
)
{
Title = title;
RequestDetails = requestDetails;
State = state;
FieldSettings = fieldSettings;
}
public DropDownTemplate
(
[Comments("HTML template for the drop-down.")]
[NameValue(AttributeNames.DEFAULTVALUE, "dropDownTemplate")]
string templateName,
[Comments("Place holder text.")]
[NameValue(AttributeNames.DEFAULTVALUE, "Select One ...")]
string placeHolderText,
[Comments("Update modelType first. Property name for the text field. Use a period for nested fields i.e. foo.bar.")]
[ParameterEditorControl(ParameterControlType.ParameterSourcedPropertyInput)]
[NameValue(AttributeNames.PROPERTYSOURCEPARAMETER, "modelType")]
string textField,
[Comments("Update modelType first. Property name for the value field. Use a period for nested fields i.e. foo.bar.")]
[ParameterEditorControl(ParameterControlType.ParameterSourcedPropertyInput)]
[NameValue(AttributeNames.PROPERTYSOURCEPARAMETER, "modelType")]
string valueField,
[Comments("Details about the drop-down data source including joins and partial field set (selects).")]
RequestDetails requestDetails,
[Comments("The request state defines sorting, filtering, grouping and aggregates if necessary.")]
DataRequestState state = null,
[ParameterEditorControl(ParameterControlType.ParameterSourceOnly)]
[Comments("Fully qualified class name for the model type.")]
string modelType = "Contoso.Domain.Entities"
)
{
TemplateName = templateName;
PlaceHolderText = placeHolderText;
TextField = textField;
ValueField = valueField;
State = state;
RequestDetails = requestDetails;
}
/// <summary>
/// Initializes a new instance of the <see cref="DataRequestResult"/> struct.
/// </summary>
/// <param name="requestState">
/// The request state.
/// </param>
/// <param name="resultRoute">
/// The result route.
/// </param>
public DataRequestResult(DataRequestState requestState, TravelRoute resultRoute)
{
this.RequestState = requestState;
this.ResultRoute = resultRoute;
}
/// <summary>
/// Initializes a new instance of the <see cref="JourneyEventArgs"/> class.
/// </summary>
/// <param name="route">
/// The route.
/// </param>
/// <param name="requestState">
/// The request state.
/// </param>
/// <param name="initiatedDate">
/// The initiated date.
/// </param>
public JourneyEventArgs(TravelRoute route, DataRequestState requestState, DateTime initiatedDate)
{
this.ResultRoute = route;
this.RequestState = requestState;
this.RequestInitiatedDate = initiatedDate;
}
