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Added: v2.0.0
Status: Active
Last reviewed: 2018-04-05
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# Comment Process service

Adds and retrieves comments for task and process instances in Process Services.

## Class members

### Methods

-   `addProcessInstanceComment(processInstanceId: string = null, message: string = null): Observable<CommentModel>`<br/>
    Adds a comment to a process instance.
    -   `processInstanceId: string = null` -  ID of the target process instance
    -   `message: string = null` -  Text for the comment
    -   **Returns** `Observable<CommentModel>` - Details of the comment added
-   `addTaskComment(taskId: string = null, message: string = null): Observable<CommentModel>`<br/>
    Adds a comment to a task.
    -   `taskId: string = null` -  ID of the target task
    -   `message: string = null` -  Text for the comment
    -   **Returns** `Observable<CommentModel>` - Details about the comment
-   `getProcessInstanceComments(processInstanceId: string = null): Observable<CommentModel[]>`<br/>
    Gets all comments that have been added to a process instance.
    -   `processInstanceId: string = null` -  ID of the target process instance
    -   **Returns** `Observable<CommentModel[]>` - Details for each comment
-   `getTaskComments(taskId: string = null): Observable<CommentModel[]>`<br/>
    Gets all comments that have been added to a task.
    -   `taskId: string = null` -  ID of the target task
    -   **Returns** `Observable<CommentModel[]>` - Details for each comment

## Details

See the [Comment Process model](comment-process.model.md) for more information about the
comments returned by the methods of this service. Also, the Comments API section of the
[Alfresco JS API docs](https://github.com/Alfresco/alfresco-js-api/tree/master/src/alfresco-activiti-rest-api)
has further details about the underlying REST API.

## See also

-   [Comment process model](comment-process.model.md)