final ChannelDO channelDo = channelDao.findById(channelId);
if (null == channelDo) {
String exceptionCause = "query channelId:" + channelId + " return null.";
logger.error("ERROR ## " + exceptionCause);
throw new ManagerException(exceptionCause);
}
ChannelStatus oldStatus = arbitrateManageService.channelEvent().status(channelDo.getId());
Channel channel = doToModel(channelDo);
// 检查下ddl/home配置
List<Pipeline> pipelines = channel.getPipelines();
if (pipelines.size() > 1) {
boolean ddlSync = true;
boolean homeSync = true;
for (Pipeline pipeline : pipelines) {
homeSync &= pipeline.getParameters().isHome();
ddlSync &= pipeline.getParameters().getDdlSync();
}
if (ddlSync) {
throw new InvalidConfigureException(INVALID_TYPE.DDL);
}
if (homeSync) {
throw new InvalidConfigureException(INVALID_TYPE.HOME);
}
}
channel.setStatus(oldStatus);
ChannelStatus newStatus = channelStatus;
if (newStatus != null) {
if (newStatus.equals(oldStatus)) {
// String exceptionCause = "switch the channel(" +
// channelId + ") status to " +
// channelStatus
// + " but it had the status:" + oldStatus;
// logger.error("ERROR ## " + exceptionCause);
// throw new ManagerException(exceptionCause);
// ignored
return;
} else {
channel.setStatus(newStatus);// 强制修改为当前变更状态
}
} else {
newStatus = oldStatus;
}
// 针对关闭操作，要优先更改对应的status，避免node工作线程继续往下跑
if (newStatus.isStop()) {
arbitrateManageService.channelEvent().stop(channelId);
} else if (newStatus.isPause()) {
arbitrateManageService.channelEvent().pause(channelId);
}
// 通知变更内容
boolean result = configRemoteService.notifyChannel(channel);// 客户端响应成功，才更改对应的状态
if (result) {
// 针对启动的话，需要先通知到客户端，客户端启动线程后，再更改channel状态
if (newStatus.isStart()) {
arbitrateManageService.channelEvent().start(channelId);
}
}
} catch (Exception e) {
logger.error("ERROR ## switch the channel(" + channelId + ") status has an exception.");
throw new ManagerException(e);
}
}
});
}