*
 * Recurrence
 * ----------
 *
 * Tasks control their recurrence schedule. The [runOnce] function returns -1L to signify that the
 * task should not be executed again. Otherwise it returns a delay until the next execution.
 *
 * A task has at most one next execution. If the same task instance is scheduled multiple times, the
 * earliest one wins. This applies to both executions scheduled with [TaskRunner.Queue.schedule] and

  project.dependencies {
    osgiApi(kotlinOsgi)
  }

  val jarTask = tasks.getByName<Jar>(jarTaskName)
  val bundleExtension =
    jarTask.extensions.findByType() ?: jarTask.extensions.create(
      BundleTaskExtension.NAME,
      BundleTaskExtension::class.java,
      jarTask,
    )
  bundleExtension.run {
    setClasspath(osgi.compileClasspath + sourceSets["main"].compileClasspath)

      "FINE: Q10000 scheduled after 100 µs: task",
      "FINE: Q10000 starting              : task",
      "FINE: Q10000 run again after  50 µs: task",
      "FINE: Q10000 finished run in   0 µs: task",
      "FINE: Q10000 starting              : task",
      "FINE: Q10000 run again after 150 µs: task",
      "FINE: Q10000 finished run in   0 µs: task",
      "FINE: Q10000 starting              : task",

                                                                value="<la:message key="labels.design_delete_button" />">
                                                            <em class="fa fa-trash">
                                                            <la:message key="labels.design_delete_button"/>
                                                        </button>

                                                                    data-url="${f:h(doc.url_link)}">
                                                                <em class="fa fa-trash">
                                                                <la:message key="labels.search_list_button_delete"/>
                                                            </button>

    }


    /**
     * @param track
     * @return tree with increased usage count
     */
    public SmbTreeImpl acquire ( boolean track ) {
        long usage = this.usageCount.incrementAndGet();
        if ( log.isTraceEnabled() ) {
            log.trace("Acquire tree " + usage + " " + this);
        }

        if ( track && this.traceResource ) {
            synchronized ( this.acquires ) {

	</button>
	<button type="button" class="btn btn-danger" name="delete"
		data-toggle="modal" data-target="#confirmToDelete"
		value="<la:message key="labels.crud_button_delete" />">
		<em class="fa fa-trash">
		<la:message key="labels.crud_button_delete" />
	</button>
	<div class="modal fade" id="confirmToDelete" tabindex="-1"
		role="dialog">
		<div class="modal-dialog">
			<div class="modal-content bg-danger">

			m.mu.Lock()
			for k, v := range m.trash {
				if time.Since(v.lastUpdate) > metacacheMaxRunningAge {
					v.delete(context.Background())
					delete(m.trash, k)
				}
			}
			m.mu.Unlock()
		}
	}()
}

// updateCacheEntry will update non-transient state.
func (m *metacacheManager) updateCacheEntry(update metacache) (metacache, error) {
	m.mu.RLock()
	if meta, ok := m.trash[update.id]; ok {
		m.mu.RUnlock()

                                            value="<la:message key="labels.crud_button_delete" />">
                                        <em class="fa fa-trash">
                                        <la:message key="labels.crud_button_delete"/>
                                    </button>
                                    <div class="modal fade" id="confirmToDelete" tabindex="-1"

## Create a task function

Create a function to be run as the background task.

It is just a standard function that can receive parameters.

It can be an `async def` or normal `def` function, **FastAPI** will know how to handle it correctly.

In this case, the task function will write to a file (simulating sending an email).