Namespace LemonEdge.API.Tasks

Classes

RevertTransactionResult

A revert transaction task result returned by the IServerTask. Holds the IHeaderTransactionalEntity that was reverted by the revert transacition task (UNIQUE_TASK_ID)

ServerTaskAttribute

This attribute must be marked against any implementation of ITaskProcessor to detail how to process it

If this is accessible from the client, and not only accessible from the service, then you do not also need to mark the parameter type with the ServerTaskParametersAttribute

ServerTaskFactory

The factory for retrieving an ITaskProcessor, ServerTaskParameter, or ITaskResultHandler, or their associated attributes to process and handle tasks (IServerTask)

See https://web.lemonedge.com/help/server-tasks/ for more information

Any task requires the following:

• ServerTaskParameter: An optional parameters implementation holding the parameters for the task. Must be marked with the ServerTaskParametersAttribute if the associated ITaskProcessor is not accessible to the client.
• ITaskProcessor: The actual implementation of the task process itself. Marked with a ServerTaskAttribute describing it and linking to its associated ServerTaskParameter (if any).
• ServerTaskResult: An optional results implementation (marked with ServerTaskResultAttribute) for storing the results of the task for client viewing/loading/etc.

ServerTaskParameter

The base class for any parameter that can work against a IServerTask and be processed by a ITaskProcessor

Any implementation can be refernced from the ParameterType, or can be marked with a ServerTaskParametersAttribute to detail what task type these parameters are for

Any implementation of this can have 3 constructors that the system will automatically use for creation in order:

• (IBaseEntity item, IEntityUpdater context): Creates default parameters using this constructor for the specified item and a context.
• (IBaseEntity item): Creates default parameters using this constructor for the soecified item.
• (): Creates default parameters using this constructor.

ServerTaskParametersAttribute

This attribute can be used to mark any implementation of the ServerTaskParameter class for defining parameters for a ITaskProcessor implementation

It is optional if the ITaskProcessor implementation is accessible from all UI clients, as that ServerTaskAttribute contains all the details.

If the ITaskProcessor is not always accessible then the ServerTaskParameter *must* be marked with this to provide detail on how to create parameters for the task and send to the server for processing

ServerTaskResult

The base class for holding the results of any task

These results are serialisable so the results stored against the by a remote server can be viewed by a client when it is complete

Any implementation must be marked with the ServerTaskResultAttribute so the system knows which type of IServerTask this result is used for

ServerTaskResultAttribute

Marks any ServerTaskResult implementation with the type if task this result hold details for

TaskRunnerBase

The base class for processing and executing tasks on either a server process or the client itself

TriggerTaskAttribute

Marks an implementation of BaseTriggerTask that this task implementation is a specialized task for processing an IActionTrigger

The default implementation of this is for processing the actions by notifying users of the action through different notification types (system, email).

Interfaces

ITaskProcessor

The main interface for any process that can run as a IServerTask on a remote server

Any implementation needs to be marked with the ServerTaskAttribute

The parameters for this process must inherit ServerTaskParameter and can optionally be marked with the ServerTaskParametersAttribute as well.

Any result handler must implement ITaskResultHandler and be marked with the ServerTaskResultAttribute

Any implementation does not have to be accessible in UI code, as long as ServerTaskParameter is accessible to create the parameters to send a task to the server (It must be marked with ServerTaskParametersAttribute then, it is not optional). This code can reside in core server implementations only.

ITaskResultHandler

An interface that can be implemented to handle the result returned from ProcessTask(CancellationToken) for every task implementation in the system

Must be marked with the ServerTaskResultAttribute to specify which type of task it handles results for

ITaskRunner

The interface any processor for implementing tasks implements

ITaskService

An interface that a service for processing IServerTask implements

The service monitors the task queue and processes tasks independantly.

Can be run from a client that is directly connected to a database, or any directly connected service

Enums

ServerTaskResultType

The type of area a ITaskResultHandler can operate within