Is there a tool & tip & method for existing system analysis - concurrency

I have received a legacy code from my company's previous project without any document and description left. The only part of these code I can recognize is Jetty for API. I can't even find the database it use yet 😛
Miserably, I probably need to do some modification of this system.
Is there a way&tools for figuring the component and relationship of this system? I mean like modeling a causal loop diagram or something by monitoring data interaction through running process and IPC etc.
I have used some previous knowledge of regular website forming langue (HTML) to locate particular syntax of code for modification.
but there should be a more general mythology and tools for analyzing the dynamic of cooperating process.

Related

How to start working on QuickFix library

I have given a project to develop Algorithmic trading system using c++ and quickFix library, I search on google about quickFix library but didn't find any useful information.
Can anybody give me some information , from where should I start?
You provide very little detail in your question, so I can only guess at a helpful approach. I have done what you are starting, in Python, and can give you some orientation. All the links Karl mentioned are crucial, (you should pay special attention to the quickfix documentation on the config file) to which I would add FIXIMATE.
To do something like this in QF you need to answer a number of questions.
Logon. Figure out how to logon. Try to get a data dictionary from your counterparty. You don't want to be forced to modify your DD too much.
Interface. How will you tell QF to logon, logoff, exit terrible positions, and so forth? I use a command line tool (cmd2) that gives me this ability. Other people code GUI windows.
Message Cracking. Some versions of QF come with a cracker but if you don't have it in C++ you will have to write your own so you can parse the incoming messages.
Data Management. How will you save incoming market data, both in RAM and to disk for analysis later? How will you represent and monitor your positions, your working orders, your audit trail? Familiarize yourself with the ScreenLogFactory and FileLogFactory in QF.
Auxiliary Functions. You will need a lot of functions you will write yourself to help at all stages. Save them all in one place and organize them into categories for easy access.
Monitoring. How will you know if something goes wrong (or right) when you are not in front of your computer monitoring the algo? I launch a completely separate process which consumes messages via a queue and sends me texts and emails.
Risk. You don't want your machine sending 1000 orders to market in the blink of an eye. You need to code some checks that will veto bad orders as a final stage before they go out. Also some code that will tell you if you are in a position when you are supposed to be flat. This part is very important.
Strategy. You will need the ability to quickly ingest data, analyze it, and generate signals. For flexibility you should not design your strategy into your system, but you should design a strategy object which can support any strategy you come up with. Then you deploy those objects within your system.
Order handling. Your algo needs to know when and how to enter orders, cancel them, move stops, etc. It will need to deal with partial fills, and be able to support multiple order types.
This is just the beginning, off the top of my head. It is a long road to do all by yourself with no help. Very interesting though, and rewarding.
You can find the QuickFIX downloads on the quickfixengine.org website here: http://www.quickfixengine.org/. From there, you can download either the source code or download pre-built packages for Visual Studio 2010, 2012 and 2013.
Documentation for QuickFIX can be found in their documentation area here: http://www.quickfixengine.org/quickfix/doc/html/. The documentation includes compilation/installation instructions and a "Getting Started" section which discusses setting up a project and writing your first QuickFIX application.
If you wish to know more about the FIX protocol, you are advised to look at the FIX website here: http://www.fixtradingcommunity.org. There are specifications on that website that will give you information on the types of messages supported by FIX and how they should be used.

BIRT integration in exsiting C++ application

I hope you are doing good and i really appreciate your help here for my query.
We have our system T3000 written in C++ (http://www.temcocontrols.com/ftp/software/9TstatSoftware.zip and codes are available here https://github.com/temcocontrols/T3000_Building_Automation_System).
I am trying to integrate 'BIRT reporting tool' in my C++ application. I want to create report based on the data available in our T3000 system. I think BIRT is embeddable (??). We don't need to compile and change the project, just need to be able to call it from T3000.exe mainly.
My thinking is we may put one menu label in existing T3000 and try to display report in user single click.
Can you please help me to solve my issue with 'BIRT' ? I really appreciate your answer.
Regards
Raju
Well, the answer depends on what your definition of "embeddable" is.
BIRT is written in pure Java.
I could think of 3 different ways:
Of course it is possible to integrate Java code into an existing C/C++ program (see Embed Java into a C++ application?).
You could just use the BIRT runtime engine and generate the report as PDF or HTML from the command line (that means, basically you call the java executable from your program with several arguments). See Birt - How to run report engine on the console? and http://eclipser-blog.blogspot.de/2008/02/automatic-generation-of-birt-reports.html for more information.
You could run a Java web server like Tomcat in a second process and then start your report by calling a http URL (e.g. you could use the included Servlet example). See http://www.eclipse.org/birt/documentation/integrating/viewer-usage.php
Similar to 3. (see below)
Some notes:
The second option is slow, due to the Java and BIRT engine startup overhead (this may take several seconds). With the first and third option, the startup overhead is or can be minimized to only once (and for each report).
For the second and third option it may be necessary to modify the existing code of the example programs to suit your needs.
The first option is probably the best for an industry-quality solution, but it is also the most difficult to develop.
Anyway, Java skills are necessary IMHO.
If you plan to run this on a SOC instead of a PC, take performance into account.
Is a Java-based solution well-suited for this kind of hardware? BIRT needs quite a lot of RAM and CPU (for a SOC). Hardware like the Raspi 3 should handle this quite easily, I reckon.
I integrated the BIRT runtime into an existing Python application (all this running on an application server) in a fourth way: I wrote a listener program that listens on a TCP socket for BIRT tasks. It uses a pool of worker processes (written in Java) which in turn use the BIRT report engine to generate the output. The client program (here: written in Python) opens a TCP connection to the listener and uses this socket to tell it which report to generate (including report parameters and destination file name). The listener program then in turn chooses a worker process for the task and gives the task to the worker process.
So, basically, this fourth option is similar to the third one, with two differences:
The communication is socket-based (instead of http), allowing bi-di communication.
The architecture is multi-processes instead of multi-threading. We choose this because very large reports could cause out-of-memory errors for otherwise unrelated reports that just happen to run at the same time. It's the same basic architecture Oracle chose for their reports server.
However, developing the programs took months.
HVB: I have to give you more than a simple thanks for the explanation above, this info will save us time I am sure. Raju will be sharing our experience after we get into the project a little deeper so others can benefit.

Multilanguage applications with MFC - workflow?

We have an English-only Windows C++ application based on MFC. It is still being developed, with updates being periodically sent to customers.
We now have a reseller who wants the ability to translate our application into other languages as needed. I understand the standard way of translating MFC applications is by using language-specific resource DLLs.
However, this presents a problem with updating the application. When updating the functionality, we sometimes add/change/delete GUI elements and text messages. How do we "push" these changes to people who would translate the resource DLL without them having to translate the whole DLL every time? What is the best workflow for this? Are there any tools that make developing and MAINTAINING multilanguage applications easier?
Are there any frameworks that could help? The reseller would prefer to have a simple text file with all text strings in it, so dealing with a resource DLL is already an unwanted compromise for them.
Are there any good books/articles on managing multilanguage application development/maintenance?
I never worked in a multilanguage project, so I am not sure what to look for. Thanks for any suggestions :)
Surely, you would keep your content, no matter how it is eventually deployed, in a source code control system. So you can see the adds, changes, and deletes.
Only send the translater the changes that need to be translated. Then they send the translations back to you. Then you package the translation into a deployable object (e.g. DLL).
Are there any tools that make developing and MAINTAINING multilanguage
applications easier?
Our product utilizes a large contingent of worldwide resellers, so, the product is typically translated into many languages. We do not translate the resources directly. We have established a relationship with each reseller. Those that want to translate are given an English dll and a list of what has changed from release to release. Most use a tool called VisualLocalize to localize the resources. The tool produces a localized resource dll from our English dll. That dll is then returned to us, or, packaged separately. They use this type of tool because it allows them to not only localize strings, but, also resize dialog controls if needed. Control size can be an issue depending on the language translation. For example, the size of a text string may be large enough to hold an English word, but, too small for some translated languages. While it may seem “dangerous” allowing a translator to change control sizes, we’ve had enough requests to do this that it’s now standard practice. And, if memory serves me, this particular tool can import and export other files types which would potentially be of use in your particular case.

C++ Usage Statistics

I have made an application in C++ and would like to know how to go about implementing a usage statistics system so that I may gather some data regarding how users use the program.
Eg. IP Address, Number of hours spent in application, and OS used.
In theory I know I can code this myself if I must, but I was wondering if there is a framework available to make this easier to do. Unfortunately I was unable to find anything on google.
Though there is no any kind of such framework, you could reduce the work you have to do (in order to retrieve all these information) by using some approaches and techniques, which I tried describe below. Please, anybody feel free to correct me.
Let's summarise, what groups of information do we need to complete the task:
User Environment Information. I suggest you to look at Microsoft's WMI infrastructure, in particular to WMI classes: Desktop, File System, Networking, etc. Using this classes in your application can help you retrieve almost all kind of system information. But if you don't satisfy with this, see #2.
Application and System Performance. Under these terms I mean overall system performance, processor's count, processes running in OS, etc. To retrieve these data you can use the NtQuerySystemInformation function. With its help, you will get an access to detailed SystemProcessInformation, SystemProcessorPerformanceInformation (retrieves info about each processor) information, and much more.
User Related Information. It's hard to find a framework to do such things, so I suggest you simply start writing code, having in mind your requirements:
counting how many times each button was pressed, each text field was changes, etc.
measuring delay time between consecutive actions in some kind of predefined sequences (for example, if you have a settings gui form and you expect from the user to fill very fast all required text fields, so using a time delay measuments can give you an information if the user acted as we expected from him or delayed after TextBox2 for a 5 minutes).
anything that could be interested to you.
So, how you could implement the last item (User Related Information) requirements? As for me, I'd do something like folowing (some may seem very hard to implement or too pointless):
- creating a kind of base Counter class and derive from it some controls (buttons, edits, etc).
- using a windows hooks for mouse or keybord while getting a child handle (to recognize a control, for example).
- using Callback class, which can do all "dirty" work (counting, measuring, performing additional actions).
You could store all this information either in a textfile or an SQLite database or there wherever you prefer.
I would recommend taking a look at DeskMetrics. This StackOverflow post summarizes the issue.
Building your own framework could take you months of development (apart from maintenance). With something like Trackerbird Software Analytics you can integrate a DLL with your app and start tracking in 30 minutes and you get all the cool real-time visualizations.
Disclaimer: I am affiliated with company.

Upgrade Path For Legacy Reporting ("Embedded" Access 2003)?

Update: Albert D. Kallal has kindly started the discussion off, and to get some more opinions I'm adding a bounty.
This is a nontrivial question about maintenance of a legacy application myself and two other developers support. We are not the original developers, and the code base is 300,000 lines of MFC and business logic tightly coupled together. We don't know every single line of code 100%.
We do know the code behind the major components, and we know that it's poorly written. Our objective is to refactor the application out of 1995 and into 2010. Between the three of us there is (in aggregate) enough experience in software architecture and database design for us to fix the components that are poorly architected in code or incorrectly modelled in the database, but we don't have a lot of experience with modern reporting systems. Thus my question (once you get to the end of it...) is about reporting systems.
For anybody who reads this entire post, I am appreciative of your time. For anybody who reads this post and replies with solutions, experience (or sympathy!), I am both appreciative and thankful.
At work I have inherited the maintenance of an Access 2003 database that contains approximately 250 reports (and thousands of supporting queries) that acts as a reporting engine for our application.
The reports all have swathes of VBA in them for particular formatting or pulling extra information into the report. For this reason we are entirely locked into the Access platform, we can't use tools like BIDS to import the Access report objects without messing around to make the report display the same without VBA.
So to get ourselves out of this Access solution we need to put some time in going over every single report. Which means we're looking to pick the best longterm solution, since we're going to have to redevelop every report regardless of the platform we choose.
Furthermore our customers have a choice of Microsoft Access or SQL Server as their database. This means that all our SQL has to be written with the lowest common denominator in mind - JET SQL. We've got some wiggle room to drop support for Microsoft Access, but we'd need to build a case for it. If the best reporting system we can identify has strong support for SQL Server but little or no support for Microsoft Access this will accelerate us dropping support for Microsoft Access as a database.
The overall implementation of the report system is quite mediocre, when we want to display reports in our application we start a Microsoft Access process, find its window and reparent it to our application, strip off its window styles and then use the Access.Application COM interface to invoke some VBA that creates linked tables to the database (either a Microsoft Access MDB or a SQL Server database) and then opens up the report we want. Probably the only supported part of the process is using the public COM interfaces, the rest is an ugly hack. The other components in the application are equally underwhelming.
To "fix" our application we've got a new development plan, with development of our application split into (approximately) three parts every year.
4 months upgrading our application to support the latest government legislation in our industry
4 months delivering a new major feature
4 months "consolidation" (fixing what is broken)
We're currently at #3 now (for this year), and we really want to take advantage of the downtime to fix up the application, refactoring the major components. We have three developers, and want AppName v5.0 out at the end of 2012 (it's currently AppName v4.12). This gives us 36 months of development effort to approportion between several components (user interface, underlying database structure, reporting, etc) over the three consolidation periods we will have before then. The sum of the components that we fix will give us v5.0.
We've scoped out what we'd like to do with most of the components except for our reporting engine, and I'm posting on SO in the hope of getting some good ideas, or at least a feel for the work that's required.
I have two ideas for improving our reporting system. Both of them involve a moderate amount of work, and there is one consideration that neither solution addresses completely: in addition to the reports that we develop, our customers also have the opportunity to request bespoke development of reports. They're customer-specific, we take their Access database, augment it with their report and give it back to the customer. There's hundreds of unique reports out there - unusable if we turned the old system off. (And we have to turn the old system off eventually - we don't know how much longer we're going to be able to mess around with the Microsoft Access window to make it look like an embedded report. We already have two distinct code paths for Access 2003 and 2007. What if we can't hack up a code path for Access 2010 and all our customers have to use Access 2007?)
For both ideas, the intention is to stop supporting our current reporting system and let it run for as long as it will without maintenance. Maybe we can hack in Access 2010 and Access 2014 support, and the customer reports that were developed keep putting along for 5 more years. Over time, we'd migrate the most commonly used reports from the old Access database into their new format.
Idea 1: Microsoft.Reporting.WinForms.ReportViewer
The first idea is to write a wrapper around the ReportViewer control as a replacement reporting engine.
We'd need to move the project to C++/CLI (already on the cards), and instead of having to launch an entire process each time we needed to view a report we could simply instantiate this control. A bonus of this that the RDLC files that contain the reports are much easier to version control in Subversion than the Access 2003 database we currently have (we use Visual SourceSafe because the tools to integrate SVN with Access don't work well with the size of our Access database). The visual designer for RDLC files is also nicely integrated into Visual Studio.
This is more of an evolutionary rather than revolutionary change to the way we do reports, the ReportViewer control will take an RDLC file that has the report layout, and our application will take care of querying the data. Because our database might be SQL Server or Microsoft Access, we still have to write simple JET SQL. We're gaining better reporting (drill down looks nice), stronger authoring tools and easier version control, but is this worth the effort?
Idea 2: SQL Server Reporting Services and SharePoint 2010 with Access Services
The second idea is to kill Access as a database platform and migrate all our customers to SQL Server (we have hosted instances of our application for those customers who don't have the skill set to set up their own SQL Server instances). Once they're migrated we would use SQL Server Reporting Services as the reporting engine, with the ReportViewer control in server rendering mode.
In addition to SQL Server Reporting Services, I am curious as to whether SharePoint 2010 with Access Services could be used to rapidly migrate existing Access reports into a more manageable format. We'd take the Access report that the customer uses, convert it to an Access Web Report then make it available for them on a SharePoint site. This would only be for our hosted customers, but if we find a way to deal quickly massage the VBA out of customer reports we could churn through the several hundred custom reports our customers have.
I'm also interested in the ability to use an Access Web Navigation Form to act as a portal to all our reports. We'd host a web browser control inside our application which would give customers access to their own reports and to our standard suite.
We'd get all the benefits of Idea #1 plus the ability to write in full Transact SQL, a reports portal, and (hopefully) a reasonable upgrade path for customer's proprietary reports.
So, my question is: am I going about this the right way? Are these viable solutions for modern reporting systems, or laughable? We have a strong preference for using the ReportViewer control either in client rendering mode where our application processes the data, or in server rendering mode in conjunction with SQL Server - but are there reporting systems like Crystal Reports which offer better reporting and better migration paths for our legacy Access reports?
If you had up to 36 months of developer time, how would you do this?
Well, ok, no one else jumping in, I give this a go.
Quite interesting how you talking about a report writer that 15+ years old. Back then the Access report writer was beyond state of the art. It was a country mile ahead of everything else in the industry. Even today a lot of competing report writers don't have the concept of sub reports that allows modeling of relational data without having to resort to code or even SQL. Then, throw in programmable VBA, then the result is something that's very unique and powerful.
For access 2007, the report writer received some more nice upgrades in terms of layout controls but that going to be of little help here.
And, for 2010 we can now display reports in a sub-form control. This feature was added to facilitate use of the new access navigation control. Access 2010 has a new web browser control (works in forms or reports), and there also a new navigation control. Your post hints that the new navigation control and the web control are somehow related to each other but they completely different features.
Both the new web browser control, and navigation control can be used in both web appliations or 100% client only applications. The navigation control is nice since you can build that nav contorl by drag and dropping reports onto the nav control to build up a up a list of reports to choose from (it is slick and easy and nice). And with this navigation control, we can actually build some nice drill down type of interfaces for reports.
As you noted for access 2010 we now have web publishing of access reports and this feature is based on SQL server reporting services (they are RDL reports). However, two important issues here is no VBA is allowed inside of the web reports. And, I also point out that there is no automatic conversion utility that is built into access that will convert existing reports into web based reports. So to build a report that's going to be designated and published to the web, you have to choose specifically to create a web report to accomplish this goal. So this answers and clears up one question of yours of will this help you convert existing reports to SQL server, and the answer is no. So, Access will not help you convert existing reports to web based RDL reports (As noted, Access uses RDL and sql reporting for those web reports - those reports also render in the access client side without conversion).
Access has a great path for web based reports via SharePoint and also Access Web is coming to Office 365. However, keep in mind this ability is not going to help much with the existing reports that you have.
In fact one of the things I would be looking at if you're going to use winforms report viewer is the change in where that existing VBA report code will be moved to? You not really mentioned this issue. As noted one really interesting and great feature of those reports is that imbedded VBA code. Often that VBA will have been used because SQL and something like RDL will NOT work because neither of those languages (sql, and RDL) are procedural code.
I can't stress how important this concept is. So, this quite much means any report writer replacements means that code will now have to be OUTSIDE of the reports and moved into your application. So, keep this issue in mind as now when you issue new reports, you also be issuing new procedural code that NOT be contained in those reports. This code will have to become part of your application (so, to issue new reports, you will thus also be issusing a new version of your software).
You are not likely to find much that allows procedural code to be imbedded inside the report like you can with access. So, that report code and logic will now have to be built and maintained within your main application and outside of the reports.
At the end of the day, I should point out the old adage if it ain't broke, then don't change it. Access been around for a very long time, but we seen significant investments from the folks in Redmond into this product during the last few years, so it shows no signs of dying anytime soon.
So, one possible suggestion is to keep the status quo, and continue going the way it works now. I mean you stated that you have to continue supporting JET for this anyway so you not getting away from having to use a major part of Access anyway. So, you continue to have to use JET engine anyway. So, you just dumping the report side and you still have use the JET data engine anyway.
However, assuming this decision's been made, I can't really suggest what report writer you should replace the access one with. Obviously considerations for the next report writer should have a seamless path to web even if they are NOW going to be rendered on the desktop. It makes no sense to make a large investment today without web considerations in some fashion.
I do think SQL server reporting services is a good choice due to the web ability. And, as an access developer we also have the option to create web based reports but they also render perfect in the access client on the desktop side (and this works when you have no server and no conversion issues exist when publishing these reports to the web, or using them local on the client). So, even if you don't use access, do choose something that allows reports to render both desktop and web like access 2010 allows.
I would consider building the report system around some .net tools. This would likely not play too well as an embedded report system inside of your existing application, but it would allow you to issue new reports, and you would not have to touch your existing code base for each new report issued. This issuing of new reports that have procedural code needs to be resolved. You likely can now issue new reports without having to modify the main application because those reports can contain code inside. I would be looking to use something that would allow new reports to be built and issued but you not having to issue new edition of your main software. You might not embeed the code in the reports anymore, but you need to palce it somewhere, and hopefully outside of your main application.
Wow, this is a great question and Albert has given you a teriffic answer.
Unfortunately I do not believe there are any magic bullets to solve your problem. I have used Microsoft Access since it's first version, and always felt it's strongest feature was as a report generator, particulary when used with SQL Server. As you undoubtably know, one can often have issues with corrupted Access databases in a multi-user environment and SQL Server addresses that issue very nicely.
To my way of thinking the biggest problem with Access is that Microsoft brought out managed code (.Net) ten years ago now but Access is still a native application. In an ideal world Microsoft would rewrite Access in C# using all the latest features such as improved support for multiple processors etc. Unfortunately I do not expect this to happen any time soon.
Visual Basic for Applications (VBA) was definately far abead of "state of the art" when it was introduced, but today I believe most would agree that coding in VB.Net with Visual Studio is much more productive than continuing to develop in VBA.
SInce the selection of a new report generator is something you will need to live with for several years, perhaps it would be helpful to consider what an "ideal" report generator for the next ten years should look like?
Personally I would want:
1) All the great graphics and ease of skinning and branding that Silverlight provides.
2) Great multiprocessor support (you must have noticed how the UI thread in Access often appears "unresponsive" when running long queries or reports).
3) Support for lots of devices such as cellphones, iPads etc. While today the desktop and web dominate, these are becoming increasingly important (unless for some particular reason they are not important to your customers going forward).
4) Support for modern programming practices such as test driven development, dependency injection etc.
Please do let us know what you decide upon.
This is a long shot, but is there a possibility of using Access to generate a saved PDF and displaying that in your app in a PDF-viewing control that is part of your app, rather than external? Or export to XML or something (I haven't a clue what XML export options are available for reports in recent versions of Access, if any)?
The point is that you'd not have to rewrite the Access reporting logic, but you'd have eliminated the fake embedding and replaced it with something that's really embedded in your application.
What you'd be giving up is the perhaps the options that the Access UI gives the user, but I'm not sure how useful that is (I'd tend to not want those options available!).
Also, you'd be persisting the reports to disk, but I'm not sure this is much of any kind of significant issue, either, but it would entirely depend on the context (I'm assuming you have no 1000-page reports with heavy graphics, etc.).
You could take a look at ActiveReports by Data Dynamics. We use it within our apps for paperwork type reports (eg, invoices) and it's extremely flexible, far more so than what you can achieve with the MS reporting tools. For reports that are genuine reports rather than paperwork we use reporting services. It's been a while since I had to port an access report to active reports, but there is little or nothing you could do in access that you can't do in active reports. I'm also fairly certain that it has a decent tool for import access reports. There's a fully functional evaluation version available for download, which, unless they've changed things, just printes a watermark in the report footer rather than expires after a fixed evaluation period. Well worth a look, I'd say - Here's a link to their site
I won't get into any specifics since I'm not a Microsoft developer, but I can answer on how to integrate a legacy product into the current or new product. As for the 36-month question, see the end of this answer.
Usage Requirements - how do you intend to use the legacy code in the context of your new code?
Identify Use Cases - drill down into usage and create a use case for each transaction between the new and old code.
Identify I/O - drill down into each use case and identify I/O requirements
Write Tests - for each I/O pair, write tests to determine the best way to handle that I/O pair.
Reuse - reuse your tests to create a wrapper/API for the legacy code.
Future - as you replace legacy code with new code, let it match your wrapper/API so you can keep refactoring to a minimum.
If I had 36 months of development time to spend, I would spend 3-6 months writing a wrapper/API and then replace each unit tested I/O pair with new code every 7-10 days utilizing sprints (scrum/agile).
For the data store, I would absolutely move from Access to some SQL server product and prioritize that requirement for the new code.
I've used Crystal, Access (2 - 2007), SQL Reporting and now DevExpress and am very happy with DevExpress's reporting engine. It is specific to .net, but can be utilized by Windows Forms, ASP.net Web pages, WPF and Silverlight. If you are willing to utilize some .net controls, I highly recomend it. It can use just about anything as a datasource and is very flexible. My current projects aren't as complex as some things I have done in the past, but I would venture to say that I would rather do complex reports using the DX engine over any other I have used.
They have an End User designer that includes scripting capabiliities and DX is actively adding functionality.
I would recommend taking a look at: http://devexpress.com/Products/Index/Reporting.xml