Inspired by the lack of searching and grouping, Hangfire.Tags provides a way to search and group different jobs.
- 100% Safe: no Hangfire-managed data is ever updated, hence there's no risk to corrupt it.
- Attributes: supports [Tag("{0}")] syntax for creating a default set of tags when creating a job.
- Extensions: has extension methods on PerformContext, but also on string (for instance for adding tags to a jobid).
- Clean up: uses Hangfire sets, which are cleaned when jobs are removed.
- Filtering: allows filtering of tags based on tags and states, this makes it easy to requeue failed jobs with a certain tag.
In .NET Core's Startup.cs:
public void ConfigureServices(IServiceCollection services)
{
services.AddHangfire(config =>
{
config.UseSqlServerStorage("connectionSting");
config.UseTagsWithSql();
});
}Otherwise,
GlobalConfiguration.Configuration
.UseSqlServerStorage("connectionSting")
.UseTagsWithSql();NOTE: If you have Dashboard and Server running separately,
you'll need to call UseTags() or UseTagsWithSql() on both.
As usual, you may provide additional options for UseTags() method.
Here's what you can configure:
- BackgroundColor – default background color for the tags
- TextColor – default text color of the tags
NOTE: After you initially add Hangfire.Tags (or change the options above) you may need to clear browser cache, as generated CSS/JS can be cached by browser.
In order to properly cleanup tags for expired jobs, an extension is required for the default storage providers. At this moment, only a provider for SQL Server is available.
Hangfire.Tags provides extension methods on PerformContext object,
hence you'll need to add it as a job argument.
NOTE: Like IJobCancellationToken, PerformContext is a special argument type which Hangfire will substitute automatically. You should pass null when enqueuing a job.
Now you can add a tag:
public void TaskMethod(PerformContext context)
{
context.AddTag("Hello, world!");
}which results in the tag hello-world.
You can also add tags using attributes, either on the class, or on the method (or both!)
[Tag("TaskMethod")]
public void TaskMethod(PerformContext context)
{
....
}In the Dashboard, when clicking on Jobs, you'll see a new menu item, called Tags. By default this page will show you all defined tags in the system. Clicking on a tag will show a list of all jobs with that tag attached.
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