Examples with WhatHappened com.aws.greengrass.config.WhatHappened used on opensource projects

Example 6 with WhatHappened

use of com.aws.greengrass.config.WhatHappened in project aws-greengrass-nucleus by aws-greengrass.

the class GreengrassService method waitForDependersToExit.

private void waitForDependersToExit() throws InterruptedException {
    List<GreengrassService> dependers = getHardDependers();
    Subscriber dependerExitWatcher = (WhatHappened what, Topic t) -> {
        synchronized (dependersExitedLock) {
            if (dependersExited(dependers)) {
                dependersExitedLock.notifyAll();
            }
        }
    };
    // subscribing to depender state changes
    dependers.forEach(dependerGreengrassService -> dependerGreengrassService.addStateSubscriber(dependerExitWatcher));
    synchronized (dependersExitedLock) {
        while (!dependersExited(dependers)) {
            logger.atDebug("service-waiting-for-depender-to-finish").log();
            dependersExitedLock.wait();
        }
    }
    // removing state change watchers
    dependers.forEach(dependerGreengrassService -> dependerGreengrassService.removeStateSubscriber(dependerExitWatcher));
}