snaker-quartz/src/main/java/org/snaker/engine/scheduling/quartz/AbstractJob.java
protected IScheduler schedule() {
	    if(scheduler == null) {
	    	scheduler = ServiceContext.getContext().find(IScheduler.class);
	    }
	    return scheduler;
	}
protected IScheduler schedule() {
	    if(scheduler == null) {
	    	scheduler = ServiceContext.getContext().find(IScheduler.class);
	    }
	    return scheduler;
	}
获取调度器接口
@return