Research on IOT RESTful Web Service Asynchronous Composition Based on BPEL

In recent years, The Internet of Things(IOT) is one of the hottest research topics. It was originally defined as connected all the things through the sensing devices to the Internet. In addition, Service-Oriented methodology has gradually drawn people's attention. Therefore, integrated The IOT with Service-Oriented methodology is very important. But now IOT service composition is mostly synchronous and service model is more complex. RESTful web services have been widely recognized and used because of their lightweight and succinct. RESTful web services introduce a new kind of abstraction, the resource, so that they are hard to compose using the Business Process Execution Language (BPEL). In order to compose asynchronous RESTful web services and make use of various IOT services, this paper proposes an asynchronous RESTful web service recursive measure, which is based on the BPEL extention. First, design the architecture of IOT RESTful web services, the architecture is divided into six layers so that it can integrate The IOT and RESTful web services effectively. Second, we show how to invoke the RESTful web services from the IOT and publish a BPEL process as a RESTful web service by extending BPEL. Finally, through an experiment to verify the correctness and validity of the proposed method in this paper.