# Interface IProcessLogProvider

OptimaJet.Workflow.Core.Logging.IProcessLogProvider

Defines a provider that stores and retrieves [ProcessLogEntry](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Logging/ProcessLogEntry/) instances for workflow processes.

Namespace: [OptimaJet.Workflow.Core.Logging](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Logging/)

```csharp
public interface IProcessLogProvider
```

## Type Hierarchy

-   IProcessLogProvider Current type
    -   Implementing types
        -   [MemoryProcessLogger](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Logging/MemoryProcessLogger/)

## Methods

`void Write(ProcessLogEntry entry)` 

Writes `entry` to the provider.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `entry` | `ProcessLogEntry` | The [ProcessLogEntry](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Logging/ProcessLogEntry/) to write. |

`Task<IEnumerable<ProcessLogEntry>> ReadAllAsync(Guid processId)` 

Retrieves all [ProcessLogEntry](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Logging/ProcessLogEntry/) instances for the process identified by `processId`.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `processId` | `Guid` | The [ProcessInstance.ProcessId](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/) value of the process whose [ProcessLogEntry](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Logging/ProcessLogEntry/) instances to retrieve. |

### Returns

| Type | Description |
| --- | --- |
| `Task<ProcessLogEntry>` | The asynchronous operation that yields all [ProcessLogEntry](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Logging/ProcessLogEntry/) instances associated with the process. |

`Task<IEnumerable<ProcessLogEntry>> ReadLastAsync(Guid processId, DateTime time)` 

Retrieves [ProcessLogEntry](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Logging/ProcessLogEntry/) instances created after `time` for the process identified by `processId`.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `processId` | `Guid` | The [ProcessInstance.ProcessId](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/) value of the process whose [ProcessLogEntry](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Logging/ProcessLogEntry/) instances to retrieve. |
| `time` | `DateTime` | The exclusive lower bound for [ProcessLogEntry.CreatedOn](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Logging/ProcessLogEntry/). |

### Returns

| Type | Description |
| --- | --- |
| `Task<ProcessLogEntry>` | The asynchronous operation that yields the matching [ProcessLogEntry](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Logging/ProcessLogEntry/) instances. |

`Task<IEnumerable<ProcessLogEntry>> ReadLastAsync(Guid processId, int count)` 

Retrieves up to `count` of the most recent [ProcessLogEntry](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Logging/ProcessLogEntry/) instances for the process identified by `processId`.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `processId` | `Guid` | The [ProcessInstance.ProcessId](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/) value of the process whose [ProcessLogEntry](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Logging/ProcessLogEntry/) instances to retrieve. |
| `count` | `Int32` | The maximum number of [ProcessLogEntry](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Logging/ProcessLogEntry/) instances to retrieve. |

### Returns

| Type | Description |
| --- | --- |
| `Task<ProcessLogEntry>` | The asynchronous operation that yields up to `count` of the most recent [ProcessLogEntry](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Logging/ProcessLogEntry/) instances, ordered from newest to oldest. |

`Task<IEnumerable<ProcessLogEntry>> ReadEarlyAsync(Guid processId, DateTime time, int count)` 

Retrieves up to `count` [ProcessLogEntry](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Logging/ProcessLogEntry/) instances created before `time` for the process identified by `processId`.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `processId` | `Guid` | The [ProcessInstance.ProcessId](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/) value of the process whose [ProcessLogEntry](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Logging/ProcessLogEntry/) instances to retrieve. |
| `time` | `DateTime` | The exclusive upper bound for [ProcessLogEntry.CreatedOn](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Logging/ProcessLogEntry/). |
| `count` | `Int32` | The maximum number of [ProcessLogEntry](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Logging/ProcessLogEntry/) instances to retrieve. |

### Returns

| Type | Description |
| --- | --- |
| `Task<ProcessLogEntry>` | The asynchronous operation that yields up to `count` of the matching [ProcessLogEntry](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Logging/ProcessLogEntry/) instances, ordered from newest to oldest. |

[Previous ILogger](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Logging/ILogger/) [Next MemoryProcessLogger](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Logging/MemoryProcessLogger/)