Examples with GroupListener org.onosproject.net.group.GroupListener used on opensource projects

Example 1 with GroupListener

use of org.onosproject.net.group.GroupListener in project onos by opennetworkinglab.

the class PointToPointIntentCompiler method waitForGroup.

/**
 * Waits for specified group to appear until timeout.
 *
 * @param deviceId {@link DeviceId}
 * @param groupKey {@link GroupKey} to wait for.
 * @param timeout timeout
 * @param unit unit of timeout
 * @return {@link Group}
 * @throws IntentCompilationException on any error.
 */
private Group waitForGroup(DeviceId deviceId, GroupKey groupKey, long timeout, TimeUnit unit) {
    Group group = groupService.getGroup(deviceId, groupKey);
    if (group != null) {
        return group;
    }
    final CompletableFuture<Group> future = new CompletableFuture<>();
    final GroupListener listener = event -> {
        if (event.subject().deviceId() == deviceId && event.subject().appCookie().equals(groupKey)) {
            future.complete(event.subject());
            return;
        }
    };
    groupService.addListener(listener);
    try {
        group = groupService.getGroup(deviceId, groupKey);
        if (group != null) {
            return group;
        }
        return future.get(timeout, unit);
    } catch (InterruptedException e) {
        log.debug("Interrupted", e);
        Thread.currentThread().interrupt();
        throw new IntentCompilationException("Interrupted", e);
    } catch (ExecutionException e) {
        log.debug("ExecutionException", e);
        throw new IntentCompilationException("ExecutionException caught", e);
    } catch (TimeoutException e) {
        // one last try
        group = groupService.getGroup(deviceId, groupKey);
        if (group != null) {
            return group;
        } else {
            log.debug("Timeout", e);
            throw new IntentCompilationException("Timeout", e);
        }
    } finally {
        groupService.removeListener(listener);
    }
}