CODEWITHSUNDEEP
javaweb-scrapingscreen-scrapingscraperwebharvest
codeMan
codeMan

Reputation: 5758

What is the difference between the exitExecution() and stopExecution() in Webharvest Scraper class

I want to know what is the difference between the 

scraper.exitExecution() and 

scraper.stopExecution() and 

scraper.finishExecutingProcessor()

I have tried looking in to the java doc, I could not find anything over there. There seems to be no proper documentation for this. Please help.

I need a method to stop the execution of the scraper after some timeout, How can I do this?

Upvotes: 0

Views: 59

Answers (1)

Andremoniy
Andremoniy

Reputation: 34900

Why not just download sourses of the library and look inside it?

Source code analyze shows, that the difference is only in statuses which these functions are set.

STATUS_STOPPED is interpreted as that configuration was aborted by user. STATUS_EXIT is interpreted as configuration was just exited.

I.e. they are almost equal.

Let's do it together:

One:

public void exitExecution(String message) {
    setStatus(STATUS_EXIT);
    this.message = message;
}

Two:

public void stopExecution() {
    setStatus(STATUS_STOPPED);
}

Next, going to BaseProcessor class, this is one of the two places where STATUS_EXIT or STATUS_STOPPED statuses are used:

public Variable run(Scraper scraper, ScraperContext context) {
        int scraperStatus = scraper.getStatus();

        if (scraperStatus == Scraper.STATUS_STOPPED || scraperStatus == Scraper.STATUS_EXIT) {
            return EmptyVariable.INSTANCE;
        }
        ...
}

Another one in class ConfigPanel:

public void onExecutionEnd(Scraper scraper) {
...
} else if (status == Scraper.STATUS_STOPPED) {
            SwingUtilities.invokeLater(new Runnable() {
                public void run() {
                    GuiUtils.showWarningMessage("Configuration \"" + configDocument.getName() + "\" aborted by user!");
                    ide.setTabIcon(ConfigPanel.this, ResourceManager.SMALL_FINISHED_ICON);
                }
            });
        } else if ( status == Scraper.STATUS_EXIT && message != null && !"".equals(message.trim()) ) {
            SwingUtilities.invokeLater(new Runnable() {
                public void run() {
                    GuiUtils.showWarningMessage("Configuration exited: " + message);
                    ide.setTabIcon(ConfigPanel.this, ResourceManager.SMALL_FINISHED_ICON);
                }
            });
        }
...
}

Upvotes: 1

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