Is there any way to import strategies built in the IB API to Interactive Brokers Trader Workstation (TWS)?
No. That's the whole purpose of having an API. TWS is used for trading manually. The API can be used to automate strategies.
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Today I have a bit tricky question. Imagine a situation when someone has written a custom connector to the network (let's say there are a lot of security features hidden and so on). Now imagine that each application can connect to the network (even IoT Edge Runtime) only through this custom connector (let's say, this connector has implementation of both https and plain MQTT protocols).
Now the issue! According to the documentation here https://github.com/Azure/iotedge/blob/master/doc/networking.md the IoT Edge Runtime connects to the network through moby-engine modified by Microsoft. According to the Microsoft, we cannot get this moby-engine. Moreover, if we use original moby project the support from the Microsoft will be caught off, which is a bad thing. So, we cannot modify moby-engine and make it use this custom connector.
Now the question!
Is it possible (may be I missed something in documentation. Not the first time tbh) to use custom connector with IoT Edge Runtime (no proxy, we need plain MQTT protocol)? If yes, can you explain in details how? If no, what posible features inside Iot Edge Runtime/moby engine can help to use custom connector?
Please ask, if you need more information. I will provide it right away. A similar question was asked by me on Microsoft github. No response from there.
The proposal from #silent pointed me to the correct direction. While reading manuals, how to properly setup a gateway, I once again began to read manual about creating custom modules. This pointed me to have a look at preparing a build environment. This again directed me to the SDK bit.
Honestly speaking, by accident and mostly out of curiosity I clicked the link about porting the SDK to my custom platform. This was the solution in my case https://github.com/Azure/azure-c-shared-utility/blob/master/devdoc/porting_guide.md
I have to mention here two other solutions I walked through:
Proxy server that supports your custom connector/protocol (will
work for cases where you do not need MQTT. However, MQTT websockets
can be used here)
Gateway. This is definitely a good one. Again many thanks to #silent.
Which one will work in your particular case is only up to you to decide.
I am familiar with the Concept of amazon SWF . I can see many SDK in different languages to use SWF services. Also, amazon Flow Framework is a set of library to implement distributed applications . Currently this Flow Framework is available in Java and Ruby . Then how can we write distributed applications using SWF in other languages like python , php etc. Does this mean amazon provides the framework in Java and Ruby only , rest of the languages have other vendor's libraries ? Please explain .
You are right that AWS currently only provides high-level frameworks for Ruby and Java ("Flow" frameworks). Low-level access to SWF is available in most (all?) official SDKs though: boto2/3 for Python, go-sdk, etc.
When using SWF, you'll find yourself implementing mainly two types of programs: "activity workers" and "deciders" (http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dev-actors.html).
Using the Flow framework is not mandatory, but it helps implementing deciders by providing high-level abstractions for describing synchronisation points, defining which tasks can be run in parallel, retries, etc. There are also non-official libraries (I'm personally maintaining one for my company, "simpleflow").
If you want to use other languages for deciders, I recommend you try to use an existing framework first, then see if you want to implement this yourself (it's not trivial from my experience).
If you want to implement activities in other languages, I recommend you start using the Flow framework end-to-end, and then you can either 1/ fork and use your favorite language as a subprocess of Ruby/Java Flow workers, or 2/ mimic the serialisation logic of the Flow framework and implement workers directly yourself with low-level APIs (which is simple: poll for an activity, do work, then respond to SWF with the result).
MEAN stack and IOT are the current trending hot topics. Can these two be used together? If yes then in what way?
How can these technologies be used together?
Sweta.
By saying MEAN.js you are including things that are not strictly in the IoT terrain. Angular for example has little to do with anything.
On the web front end you need to implement a javascript library like Paho.js that will use the MQTT protocol to connect to a broker and start aggregating messages from connected devices.
Express has little to do as well as you are not exposing a Restful interface but connecting low level through a broker. A good solution in Node.js is Mosca.
Mongo is good for dumping data from devices.
I have written a tutorial using Node.js and iOS so have a look and you might find it interesting.
Mean stack is the combination of the frontent web frameworks like angularjs,emberjs,knockoutjs,backbonejs , javascript's backend server called nodejs and using the mongodb at top. so using these frameworks and library will make a mean stack developer.
IoT pronounced as Internet of things. iot is recently used for connected electronics devices .basically it is a form of running your program inside the electronic chip and mostly trying to connect the devices.making control on devices using the programmed chip. there are separate IDE's are avaialble for developing and testing the programme on embeded chip.
you can use angularjs as a frontend(making your GUI) for your IoT'S application.
Yes, you can.
As a fact is has been done before. And in other frontend frameworks too. Here there is an example for home automation.
You can find even a yeoman generator for such projects here.
[Disclaimer: I work here] Netbeast started managing devices and creating a system of plugins on top
of a MEAN app and RESTful communications. (Now we use a MERN
stack, with react and MQTT over websockets to control networks and
update values in real time.)
To mention other places where you can find examples of current projects using MEAN to run IoT networks I encourage you to join angular, arduino and raspberry communities, as well as taking a tour over producthunt.com, hackster.io and other maker sites such as the previously mentioned Netbeast forum.
Yes you can make an IoT platform with the MEAN stack. Typically the sensors are low cost sensors and are constantly transmitting small amounts of data in MQTT or TCP protocols. With Node.js you can write, servers for such applications very easily.
Mongo is useful if you have unstructured data, which could happen if you work with multiple sensors. If you don't need unstructured data structures, SQL is sufficient.
All the data that you get from devices, finally needs to be consumed via applications. Express and Angular are great platforms to manage web applications.
You can read a little more about IoT platforms in MEAN at http://blog.yatis.io/scalable-iot-platform-mean-stack/
Do I know, whether any load testing tool is there for testing SAP GUI based applications?
I have been using Load Runner as of now, but the license is going to expire soon. So, I am in a position to find the better replacement for the same.
Responses are appreciated :-)
Thanks in advance.
There are no open source tools for testing SAPGUI applications. Architecturally, none of the existing open source applications have hooks to the automation interface used by SAP. So, you may discount the previous answer which concentrates on web-based interfaces or a generic TCP interface. The interface for SAPGUI automation is on the client.
SAPWeb, on the other hand, may be tackled with standard commercial and open source solutions which architecturally support the capture, modification and reproduction of traffic at the HTTP protocol layer.
Renew your LoadRunner license. The cost in hours of labor to modify any of the available open source tools will more than exceed the cost of your LoadRunner license. You will need to establish a relationship with SAP for the interface documentation. You will need to build a recording interface and a playback interface. You can look to the R&D output from the big vendors, HP, Borland, IBM, to see what a non trivial and high engineering dollar challenge this is.
I'm trying to make an application that will allow a user to initiate builds, see build info etc, and just general TFS based actions.
I've found a few guides on how to use the SDK... http://msdn.microsoft.com/en-us/library/bb286958.aspx
But I can't use the TeamFoundation.*.dll's in the metro/win8 app... http://msdn.microsoft.com/en-us/library/windows/apps/br230302(v=vs.110).aspx
so, is there an alternative? Do they have a separate api? (you can access a tfs project via the web access, providing a web based alternative from doing it all in visual studio).
Thanks,
james.
Windows RT is an ARM based surface and the TFS SDK/OM is only available compiled for x86. So, it will not work.
Windows Surface PRO available later will be x86 based.
The closest you could probably get is if you coded directly to the SOAP web service layer directly. The TFS team is also starting to create RESTful http APIs with light http clients but that's a work in progress that's just starting. That would be the long term approach available someday.
If you're creating a Windows store app, you should note that it's sandboxed. The TFS team is looking into that as we transition toward REST and a more modern REST client.