[CAUSEWAY-1960] Action background execution: provide built-in default implementation

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0-M3
• Component/s: Core
• Assignee: Andi Huber
• Reporter: Andi Huber
• Created: 03/Jun/18 16:12
• Updated: 10/Nov/19 07:57
• Resolved: 10/Nov/19 07:57

Description

We want this code to run out-of the box (without the need for developers to provide their own implementation of BackgroundCommandService) ...

@Inject BackgroundService backgroundService;
@Inject RepositoryService repositoryService;
@Inject MessageService messageService;

@Action
public SimpleObject runInBackground(){
    backgroundService.execute(this).backgroundTask();
    return this;
}
    
@Programmatic
public void backgroundTask(){
    messageService.informUser("backgroundTask started");	

    try {
        Thread.sleep(8000); // wait 8s
    } catch (InterruptedException e) {
        e.printStackTrace();
    }	
	
    val dummy = new SimpleObject();
    dummy.setName("Dummy");
	
    repositoryService.persist(dummy);
	
    messageService.informUser("backgroundTask finished");	
}

We solve this using a default ExecutorService to run Action invocations in the background.

Issue Links

• is superceded by: CAUSEWAY-2102 Support for Server Sent Events (SSE)