|By Paul Horan||
|September 22, 2013 07:45 AM EDT||
|Language||C#, Java, or Objective-C|
|Platform||iOS, Java for Android, Java ME for Blackberry, .Net Framework for Windows, .Net Compact Framework 3.5 for Windows Mobile|
|Mobile Server||Select the SMP server where the MBO model has been deployed.|
|Server Domain||This should correspond to the Application name in the SMP Control Center|
|Page Size||Controls the size of the data page in the remote database. Do not select a size that is smaller than is required for a single row.|
|Destination||Generate into a project folder, or into a specific folder on the file system.|
|Clean up...||This completely ERASES the contents of the destination folder before code generation, so USE WISELY|
The key point to remember when using the Object API is that all operations are performed against the local device database, including MBO object queries. No data is exchanged between the device and the SMP server (and ultimately the backend EIS or database resource) until the application calls the Synchronizeor startSynchronize API method (startSynchronize is the asynchronous, non-blocking version of the method). The placement of this method call is totally up to the requirements of the application. To simulate an "online" environment, place the synchronize call immediately after any CUD (Create/Update/Delete) transaction, so that the device immediately sends the transaction to SMP. To function "offline", just call submitPending to record the transactions locally, and delay the Synchronize call until the user clicks a button, or a live connection is detected.
OData, or the Open Data Protocol, has emerged as the primary protocol for data exchange across the web. OData operates somewhat like SQL, but instead of querying a relational database, the endpoint is a REST-based web service URL, and the application uses standard HTTP verbs like GET, POST, PUT, and DELETE to interact with the service endpoint. The protocol defines specific command modifiers, like $select, $filter, $orderby, and $expand to retrieve specific elements from the endpoint URL. Data returned from the endpoint is formatted in either JSON or XML, using the AtomPub schema.
SAP has identified OData as a strategic direction for the entire portfolio of products, and the OData SDK provides a comprehensive set of API's for securely accessing OData endpoints from native mobile device applications. The OData SDK is delivered as a set of static runtime libraries on the iOS, Android, and Blackberry platforms. The MBO model is not used with OData applications, and there is no code generation step required.
The OData SDK consists of five major components and classes.
Parses and generates valid OData protocol messages to/from native objects. It eliminates the need for mobile developers to work with the low-level details of the OData protocol directly. Functionalities supported by this component include:
- Parsing OData XML structures to native OData objects
- Validating OData XML during parsing by checking the existence of mandatory fields and structures
- Providing easy access to all OData fields and structures via the objects resulting from the parsing
- Building OData XML structures from native OData objects
The runtime cache is responsible for storing and accessing OData related objects in the memory of the device for quick and easy access. Functionalities supported by this component include:
- Storing/accessing OData objects in the memory (both metadata and application data)
- Searching for OData entries in memory using their searchable fields
- Managing the size of the cache
Implements a convenient and secure storage of data on the device. Mobile applications can access the locally stored data even when network connection is unavailable. Functionalities supported by this component include:
- Storing objects and raw data on the physical storage of the device
- Easy and quick access of the stored objects and raw data
- Data encryption for sensitive data
Implements standard SAP logging, tracing and error handling to enable end-to-end supportability from client to back-end. Functionalities supported by this component include:
- Common exception and error handling
- Event logging
- Tracing (SAP Passport)
This connectivity layer handles all connectivity related tasks, hides the complexity of the communication at transport level, and provides an easy to use API to the applications. Productive enterprise applications must use SAP Mobile Platform for connectivity for all enterprise use cases. For development and demo purposes, the SDK also provides a possibility to use HTTP or HTTPS. Functionalities supported by this component include:
- Synchronous and asynchronous HTTP request handling
- Supported authentication are:
- X509 certification
- SSO token/cookie
- Basic authentication (user/password)
- Timeout handling
- Compressed payload handling
- Request types as supported by OData Protocol
- Connection pools for optimal performance
The OData SDK provides basic persistence capabilities, but these are not to
The key step in setting up an OData SDK application is to create the Application ID in SAP Control Center, and define it as an "OData" type. That dialog box is shown below, with sample data. Note the Application Endpoint setting. That URL references the root "service document" of the application's OData endpoint. Making this URL an attribute of the Application adds a layer of security, since only registered Application Connections will be able to access that endpoint through the SMP proxy. There is no need to expose that OData URL outside the corporate firewall. The mobile application retrieves the endpoint URL as a property of the Application, once a successful connection is made to the SMP server, and then provides that on all subsequent OData queries and updates.
Refer to the OData SDK Developer Guide for more thorough instructions on the use of the API within your application.
Note: OData is inherently an HTTP-based protocol, but with SMP 2.x, OData SDK apps communicate with the SMP server using the proprietary "iMO" messaging protocol. It's essentially "HTTP over iMO". WIth SMP 3.0, this will be changed to use standard HTTP(s) for communication.
HTTP REST API
The HTTP REST API is the most recent addition to the catalog of programming interfaces. However, it's a little misleading to call it a traditional "API", since there are no client-side libraries to include with the application code, and no language-specific methods to invoke for implementation. With the release of SUP 2.2, an HTTP listener was added to the SMP server, and several REST endpoints were exposed on the open port (which is 8000, by default). These REST services perform basic SMP administration and security functions. This "decoupling" of client and server platforms allows SMP applications to be written in any language, on any platform, using any IDE. As long as the mobile application is capable of performing an HTTP call to a REST endpoint, it can be secured and managed by the SMP server.
The REST API provides four basic capabilities to a mobile application.
- Registration: Creating an Application Connection and registering the device ID and type to SMP;
- Authentication: The Application is linked to a specific Security Configuration, and any connection must satisfy the authentication requirements. Anonymous application connections are also supported;
- Native Push Notification: The mobile app can register for push notifications through APNS, GCM, or Blackberry BES
- Configuration: The mobile app can call SMP to persist specific application settings or preferences;
All the calls to the API are performed by making HTTP calls to a REST endpoint, which is defined on the SMP server. (If the Relay Server or a 3rd-party reverse proxy server is in place, the URL of the endpoint should reference that URL instead.) For example, to register an Application Connection, the mobile application simply needs to perform an HTTP POST as shown below. The body of the post contains the minimum default XML content.
<?xml version="1.0" encoding="UTF-8"?>
<entry xmlns="http://www.w3.org/2005/Atom" xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata"
In the above URL, domain:port would correspond to either the SMP server and port, or the relay server, on their respective HTTP or HTTPS ports. Theappid would be the Application ID as defined in the SAP Control Center. Once successfully registered and authorized, application data can be retrieved from the OData endpoint with any HTTP request and JSON/XML parsing logic. You can also create additional OData Proxy connections in SCC, creating a "whitelist" of valid endpoints for the application to use.
The SCC dialog for registering a REST API app is exactly the same as the OData figure shown above (except, of course, that you select "REST API" from the dropdown list...) so I won't duplicate that here. Suffice it to say that the Application must exist in SCC as a REST API app before any registration and authentication attempts can be made against it.
As far as online vs. offline goes, I'll call this one "custom", meaning that while a live data connection must be present for any interaction with the SMP server (device registration, authentication, etc.), offline could be supported by any intrepid developer that wants to build and deploy their own SQLite or UltraLite database for the remote device, write the application to persist transactions into that local database, then write the synchronization logic to keep that database in sync with the backend EIS. Don't forget to manage the entire synchronization session as a restartable, ACID-compliant unit... (All of that is exactly what the MBO model and the Object API provides for you in a single mouse click.)
One final note on the HTTP REST API: if you are developing a native app in Objective-C or Java against an OData endpoint, then the Persistence, Caching, and OData Parser libraries from the OData SDK (as mentioned in the section above) may be leveraged in your project. Just include the corresponding SDK libraries in your project, and those functions will be available to your application. The Registration and Transport layer libraries would not be applicable in this use case.
Refer to the SMP Developer Guide: REST API Applications for more detailed information on programming to this API.
Here's a quick wrapup of the four options presented above, so you can choose the most appropriate architecture for your SMP 2.x application.
|API||Supported Languages/Platforms||Uses MBO's?||Supports Offline?|
|Native Object API||
iOS: Xcode and Objective-C
Blackberry: Java ME
Windows: .NET Framework 3.5
Windows Mobile: .NET Compact Framework 3.5
iOS: Xcode and Objective-C
Blackberry: Java ME
|HTTP REST API||Any||No||Custom
One of the bewildering things about DevOps is integrating the massive toolchain including the dozens of new tools that seem to crop up every year. Part of DevOps is Continuous Delivery and having a complex toolchain can add additional integration and setup to your developer environment. In his session at @DevOpsSummit at 18th Cloud Expo, Miko Matsumura, Chief Marketing Officer of Gradle Inc., will discuss which tools to use in a developer stack, how to provision the toolchain to minimize onboa...
Feb. 13, 2016 08:00 PM EST Reads: 145
With an estimated 50 billion devices connected to the Internet by 2020, several industries will begin to expand their capabilities for retaining end point data at the edge to better utilize the range of data types and sheer volume of M2M data generated by the Internet of Things. In his session at @ThingsExpo, Don DeLoach, CEO and President of Infobright, will discuss the infrastructures businesses will need to implement to handle this explosion of data by providing specific use cases for filte...
Feb. 13, 2016 02:00 PM EST Reads: 258
SYS-CON Events announced today that Pythian, a global IT services company specializing in helping companies adopt disruptive technologies to optimize revenue-generating systems, has been named “Bronze Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2015 at the Javits Center in New York, New York. Founded in 1997, Pythian is a global IT services company that helps companies compete by adopting disruptive technologies such as cloud, Big Data, advanced analytics, and DevO...
Feb. 13, 2016 01:30 PM EST Reads: 286
SYS-CON Events announced today that Avere Systems, a leading provider of enterprise storage for the hybrid cloud, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. Avere delivers a more modern architectural approach to storage that doesn’t require the overprovisioning of storage capacity to achieve performance, overspending on expensive storage media for inactive data or the overbuilding of data centers ...
Feb. 13, 2016 01:30 PM EST Reads: 146
SYS-CON Events announced today that Commvault, a global leader in enterprise data protection and information management, has been named “Bronze Sponsor” of SYS-CON's 18th International Cloud Expo, which will take place on June 7–9, 2016, at the Javits Center in New York City, NY, and the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Commvault is a leading provider of data protection and information management...
Feb. 13, 2016 12:45 PM EST Reads: 473
The Quantified Economy represents the total global addressable market (TAM) for IoT that, according to a recent IDC report, will grow to an unprecedented $1.3 trillion by 2019. With this the third wave of the Internet-global proliferation of connected devices, appliances and sensors is poised to take off in 2016. In his session at @ThingsExpo, David McLauchlan, CEO and co-founder of Buddy Platform, will discuss how the ability to access and analyze the massive volume of streaming data from mil...
Feb. 13, 2016 12:00 PM EST
SYS-CON Events announced today that Alert Logic, Inc., the leading provider of Security-as-a-Service solutions for the cloud, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. Alert Logic, Inc., provides Security-as-a-Service for on-premises, cloud, and hybrid infrastructures, delivering deep security insight and continuous protection for customers at a lower cost than traditional security solutions. Ful...
Feb. 13, 2016 12:00 PM EST Reads: 474
SYS-CON Events announced today that Interoute, owner-operator of one of Europe's largest networks and a global cloud services platform, has been named “Bronze Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2015 at the Javits Center in New York, New York. Interoute is the owner-operator of one of Europe's largest networks and a global cloud services platform which encompasses 12 data centers, 14 virtual data centers and 31 colocation centers, with connections to 195 ad...
Feb. 13, 2016 12:00 PM EST Reads: 451
SYS-CON Events announced today that Men & Mice, the leading global provider of DNS, DHCP and IP address management overlay solutions, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. The Men & Mice Suite overlay solution is already known for its powerful application in heterogeneous operating environments, enabling enterprises to scale without fuss. Building on a solid range of diverse platform support,...
Feb. 13, 2016 11:45 AM EST Reads: 278
WebSocket is effectively a persistent and fat pipe that is compatible with a standard web infrastructure; a "TCP for the Web." If you think of WebSocket in this light, there are other more hugely interesting applications of WebSocket than just simply sending data to a browser. In his session at 18th Cloud Expo, Frank Greco, Director of Technology for Kaazing Corporation, will compare other modern web connectivity methods such as HTTP/2, HTTP Streaming, Server-Sent Events and new W3C event APIs ...
Feb. 13, 2016 11:30 AM EST
Fortunately, meaningful and tangible business cases for IoT are plentiful in a broad array of industries and vertical markets. These range from simple warranty cost reduction for capital intensive assets, to minimizing downtime for vital business tools, to creating feedback loops improving product design, to improving and enhancing enterprise customer experiences. All of these business cases, which will be briefly explored in this session, hinge on cost effectively extracting relevant data from ...
Feb. 13, 2016 11:30 AM EST Reads: 158
There will be new vendors providing applications, middleware, and connected devices to support the thriving IoT ecosystem. This essentially means that electronic device manufacturers will also be in the software business. Many will be new to building embedded software or robust software. This creates an increased importance on software quality, particularly within the Industrial Internet of Things where business-critical applications are becoming dependent on products controlled by software. Qua...
Feb. 13, 2016 11:00 AM EST
SYS-CON Events announced today that iDevices®, the preeminent brand in the connected home industry, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. iDevices, the preeminent brand in the connected home industry, has a growing line of HomeKit-enabled products available at the largest retailers worldwide. Through the “Designed with iDevices” co-development program and its custom-built IoT Cloud Infrastruc...
Feb. 13, 2016 11:00 AM EST Reads: 154
Companies can harness IoT and predictive analytics to sustain business continuity; predict and manage site performance during emergencies; minimize expensive reactive maintenance; and forecast equipment and maintenance budgets and expenditures. Providing cost-effective, uninterrupted service is challenging, particularly for organizations with geographically dispersed operations.
Feb. 13, 2016 11:00 AM EST
Join us at Cloud Expo | @ThingsExpo 2016 – June 7-9 at the Javits Center in New York City and November 1-3 at the Santa Clara Convention Center in Santa Clara, CA – and deliver your unique message in a way that is striking and unforgettable by taking advantage of SYS-CON's unmatched high-impact, result-driven event / media packages.
Feb. 13, 2016 10:00 AM EST Reads: 104
As enterprises work to take advantage of Big Data technologies, they frequently become distracted by product-level decisions. In most new Big Data builds this approach is completely counter-productive: it presupposes tools that may not be a fit for development teams, forces IT to take on the burden of evaluating and maintaining unfamiliar technology, and represents a major up-front expense. In his session at @BigDataExpo at @ThingsExpo, Andrew Warfield, CTO and Co-Founder of Coho Data, will dis...
Feb. 13, 2016 09:45 AM EST Reads: 234
Silver Spring Networks, Inc. (NYSE: SSNI) extended its Internet of Things technology platform with performance enhancements to Gen5 – its fifth generation critical infrastructure networking platform. Already delivering nearly 23 million devices on five continents as one of the leading networking providers in the market, Silver Spring announced it is doubling the maximum speed of its Gen5 network to up to 2.4 Mbps, increasing computational performance by 10x, supporting simultaneous mesh communic...
Feb. 13, 2016 05:00 AM EST
Eighty percent of a data scientist’s time is spent gathering and cleaning up data, and 80% of all data is unstructured and almost never analyzed. Cognitive computing, in combination with Big Data, is changing the equation by creating data reservoirs and using natural language processing to enable analysis of unstructured data sources. This is impacting every aspect of the analytics profession from how data is mined (and by whom) to how it is delivered. This is not some futuristic vision: it's ha...
Feb. 13, 2016 04:45 AM EST Reads: 475
The cloud promises new levels of agility and cost-savings for Big Data, data warehousing and analytics. But it’s challenging to understand all the options – from IaaS and PaaS to newer services like HaaS (Hadoop as a Service) and BDaaS (Big Data as a Service). In her session at @BigDataExpo at @ThingsExpo, Hannah Smalltree, a director at Cazena, will provide an educational overview of emerging “as-a-service” options for Big Data in the cloud. This is critical background for IT and data profes...
Feb. 13, 2016 03:45 AM EST Reads: 256
With the Apple Watch making its way onto wrists all over the world, it’s only a matter of time before it becomes a staple in the workplace. In fact, Forrester reported that 68 percent of technology and business decision-makers characterize wearables as a top priority for 2015. Recognizing their business value early on, FinancialForce.com was the first to bring ERP to wearables, helping streamline communication across front and back office functions. In his session at @ThingsExpo, Kevin Roberts...
Feb. 12, 2016 12:45 AM EST Reads: 430