|By Lahlali Issam||
|November 26, 2013 11:31 AM EST||
Many Java static analysis tools exist right here, each one focusing on a specific area and each one has its advantages, we can enumerate:
- Pmd which is a static rule-set based Java source code analyzer that identifies potential problems like:
- Possible bugs—Empty try/catch/finally/switch blocks.
- Dead code—Unused local variables, parameters and private methods.
- Empty if/while statements.
- Overcomplicated expressions—Unnecessary if statements, for loops that could be while loops.
- Suboptimal code—Wasteful String/StringBuffer usage.
- FindBugs which looks for bugs in Java code. It uses static analysis to identify hundreds of different potential types of errors in Java programs.
- Checkstyle defines a set of available modules, each of which provides rules checking with a configurable level of strictness (mandatory, optional...). Each rule can raise notifications, warnings, and errors.
Many ways exist to exploit the results of these tools:
- XML format: XML files could be generated from each of these tools, and it can be used to create an HTML report or used by another tool to exploit the analysis result.
- HTML format: HTML report is the prefered way to generate reports and share them between the team, and you can create your custom report by using an xsl stylesheet.
- IDE Plugins: almost all known IDE provides plugins for these tools, which gives the possibility to discover all violations from the source code.
One of the problems with code quality tools is that they tend to overwhelm developers with problems that aren't really problems -- that is, false positives. When false positives occur, developers learn to ignore the output of the tool or abandon it altogether.
And to exploit better their result, it's better to have a way to focus only on what we want and gives to developers a useful view. In this post we will discover another interesting way to exploit better the result of all known java static analysis tools, and query them like a database.
JArchitect and CQLinq
JArchitect is another static analysis tool which complements the other tools, it uses a code query langage based on Linq ( CQLinq) to query the code base like a database.
Until JArchitect 3 you can query only analysis data extracted from JArchitect, however the V4 gives the possibility to import the analysis result from many other static analysis tools and query them with CQLinq.
Let's take as example the source code of the PDT core (the Php plugin for eclipse). and discover how we can exploit the analysis result of these tools from JArchitect.
To begin here are the steps to follows before requesting the analysis result:
- Step1: Analyse the project with PMD, CPD, FindBugs and CheckStyle. And generate the XML files containing the result.
- Step2: Analyze the project with JArchitect.
- Step3: Import all the xml files into JArchitect from the menu "Plugins->Import Plugins Result Files"
Get all issues:
The request to get all issues is very simple, however as you can see it's not very interesting, indeed it's a challenge to exploit a result with 232 725 issues.
To exploit better the result of these tools we can filter it with CQLinq and focus only on what we want.
Request by ruleset
Request by priority
We can also filter by priority:
Most recurrent issues
Classes having most issues
It's very interesting to know the classes which contains many violations
As we can observe CheckStyle report thousand of issues and many of them could be ignored.
The previous query is interesting, but it's not give us exactly the classes with lack of quality, another useful metric to take into account is the NBLinesOfCode, it's normal that a class with many lines of code contains many issues, for that we can modify the previous request to calculate the ratio between the Issues count and the NBLinesofCode.
What's very strange in this result is that the ratio of the 8 first classes is more than 200, in this case we have more than 200 issues by code line.
To explain this behavior let's take a look at some lines of the CompilerAstParser:
The NbLinesOfCode is the number of statements and not the physical lines, and this Class declare many arrays , each one is declared by thousand of physical lines, however each array declaration is considered as one statement.
And as shown before for the most recurrent issues query, the following rule '+' should be on a new line. is violated thousand of times for each array. Maybe it's better to remove these kind of rules from the CheckStyle configuration file.
Most popular methods having issues
When the static analysis tools report the issues, it's useful to locate which the prioritary issues to resolve? specially if it concerns bugs.
It's true that a bug could exist in a specific method, but what interesting to know is how many methods are impacted by the bug, and the popular method are the most used ones and it's better to resolve them quickly.
Using CQLinq we can combine the result of all these tools and also the result of JArchitect to create more elaborated queries, and add these checks to the build process.
Having issues in a project is not bad, we can say that's normal, however we have to check the quality trend of the project. Indeed it's a bad indicator if the number of issues grows after changes and evolutions. /p>
JArchitect provides the Trend Monitoring feature to create trend charts. Trend charts are made of trend metrics values logged over time at analysis time. More than 50 trend metrics are available per default and it is easy to create your own trend metrics.
Let's create a trend metric for the Pmd issues:
And after you can easily create the trend chart to monitor the previous trend metric and add it to the JArchitect dashboard.
With this trend chart we can monitor the evolution of the Pmd issues, and try to understand the reasons when the metric grows over versions.
Customize the JArchitect report
JArchitect make possible to append extra report sections in the HTML report that lists some CQLinq queries. In the CQLinq Query Explorer panel, a particular CQLinq group reported is bordered with an orange rectangle.
You can also add to the report the Pmd trend chart:
And in the HTML report these added sections are accesible from the menu:
And here's the page added in the report for the Pmd CQLinq queries:
JArchitect 4 is now open to other static analysis tools, and you can also plug your customized tool easily as descibed here. This way you can use all the JArchitect features to exploit better the result from the known java static analysis tools.
Manufacturing connected IoT versions of traditional products requires more than multiple deep technology skills. It also requires a shift in mindset, to realize that connected, sensor-enabled “things” act more like services than what we usually think of as products. In his session at @ThingsExpo, David Friedman, CEO and co-founder of Ayla Networks, will discuss how when sensors start generating detailed real-world data about products and how they’re being used, smart manufacturers can use the data to create additional revenue streams, such as improved warranties or premium features. Or slash...
Sep. 5, 2015 03:00 AM EDT
SYS-CON Events announced today that HPM Networks will exhibit at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. For 20 years, HPM Networks has been integrating technology solutions that solve complex business challenges. HPM Networks has designed solutions for both SMB and enterprise customers throughout the San Francisco Bay Area.
Sep. 5, 2015 01:30 AM EDT Reads: 997
All major researchers estimate there will be tens of billions devices - computers, smartphones, tablets, and sensors - connected to the Internet by 2020. This number will continue to grow at a rapid pace for the next several decades. With major technology companies and startups seriously embracing IoT strategies, now is the perfect time to attend @ThingsExpo, November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Learn what is going on, contribute to the discussions, and ensure that your enterprise is as "IoT-Ready" as it can be.
Sep. 5, 2015 01:00 AM EDT Reads: 254
SYS-CON Events announced today that Pythian, a global IT services company specializing in helping companies leverage disruptive technologies to optimize revenue-generating systems, has been named “Bronze Sponsor” of SYS-CON's 17th Cloud Expo, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. 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 DevOps to advance innovation and increase agility. Specializing in designing, imple...
Sep. 5, 2015 01:00 AM EDT Reads: 412
Too often with compelling new technologies market participants become overly enamored with that attractiveness of the technology and neglect underlying business drivers. This tendency, what some call the “newest shiny object syndrome,” is understandable given that virtually all of us are heavily engaged in technology. But it is also mistaken. Without concrete business cases driving its deployment, IoT, like many other technologies before it, will fade into obscurity.
Sep. 4, 2015 06:45 PM EDT Reads: 458
With the proliferation of connected devices underpinning new Internet of Things systems, Brandon Schulz, Director of Luxoft IoT – Retail, will be looking at the transformation of the retail customer experience in brick and mortar stores in his session at @ThingsExpo. Questions he will address include: Will beacons drop to the wayside like QR codes, or be a proximity-based profit driver? How will the customer experience change in stores of all types when everything can be instrumented and analyzed? As an area of investment, how might a retail company move towards an innovation methodolo...
Sep. 4, 2015 04:15 PM EDT Reads: 535
Contrary to mainstream media attention, the multiple possibilities of how consumer IoT will transform our everyday lives aren’t the only angle of this headline-gaining trend. There’s a huge opportunity for “industrial IoT” and “Smart Cities” to impact the world in the same capacity – especially during critical situations. For example, a community water dam that needs to release water can leverage embedded critical communications logic to alert the appropriate individuals, on the right device, as soon as they are needed to take action.
Sep. 4, 2015 04:00 PM EDT Reads: 101
WebRTC services have already permeated corporate communications in the form of videoconferencing solutions. However, WebRTC has the potential of going beyond and catalyzing a new class of services providing more than calls with capabilities such as mass-scale real-time media broadcasting, enriched and augmented video, person-to-machine and machine-to-machine communications. In his session at @ThingsExpo, Luis Lopez, CEO of Kurento, will introduce the technologies required for implementing these ideas and some early experiments performed in the Kurento open source software community in areas ...
Sep. 4, 2015 03:45 PM EDT Reads: 152
While many app developers are comfortable building apps for the smartphone, there is a whole new world out there. In his session at @ThingsExpo, Narayan Sainaney, Co-founder and CTO of Mojio, will discuss how the business case for connected car apps is growing and, with open platform companies having already done the heavy lifting, there really is no barrier to entry.
Sep. 4, 2015 03:00 PM EDT Reads: 231
As more intelligent IoT applications shift into gear, they’re merging into the ever-increasing traffic flow of the Internet. It won’t be long before we experience bottlenecks, as IoT traffic peaks during rush hours. Organizations that are unprepared will find themselves by the side of the road unable to cross back into the fast lane. As billions of new devices begin to communicate and exchange data – will your infrastructure be scalable enough to handle this new interconnected world?
Sep. 4, 2015 02:00 PM EDT Reads: 275
The Internet of Things is in the early stages of mainstream deployment but it promises to unlock value and rapidly transform how organizations manage, operationalize, and monetize their assets. IoT is a complex structure of hardware, sensors, applications, analytics and devices that need to be able to communicate geographically and across all functions. Once the data is collected from numerous endpoints, the challenge then becomes converting it into actionable insight.
Sep. 4, 2015 12:30 PM EDT Reads: 124
SYS-CON Events announced today that IceWarp will exhibit at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. IceWarp, the leader of cloud and on-premise messaging, delivers secured email, chat, documents, conferencing and collaboration to today's mobile workforce, all in one unified interface
Sep. 4, 2015 12:00 PM EDT Reads: 506
SYS-CON Events announced today that Micron Technology, Inc., a global leader in advanced semiconductor systems, will exhibit at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Micron’s broad portfolio of high-performance memory technologies – including DRAM, NAND and NOR Flash – is the basis for solid state drives, modules, multichip packages and other system solutions. Backed by more than 35 years of technology leadership, Micron's memory solutions enable the world's most innovative computing, consumer,...
Sep. 4, 2015 12:00 PM EDT Reads: 300
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, GM of Platform at FinancialForce.com, will discuss the value of business applications on wearable ...
Sep. 4, 2015 12:00 PM EDT Reads: 114
As more and more data is generated from a variety of connected devices, the need to get insights from this data and predict future behavior and trends is increasingly essential for businesses. Real-time stream processing is needed in a variety of different industries such as Manufacturing, Oil and Gas, Automobile, Finance, Online Retail, Smart Grids, and Healthcare. Azure Stream Analytics is a fully managed distributed stream computation service that provides low latency, scalable processing of streaming data in the cloud with an enterprise grade SLA. It features built-in integration with Azur...
Sep. 4, 2015 11:45 AM EDT Reads: 406
SYS-CON Events announced today the Containers & Microservices Bootcamp, being held November 3-4, 2015, in conjunction with 17th Cloud Expo, @ThingsExpo, and @DevOpsSummit at the Santa Clara Convention Center in Santa Clara, CA. This is your chance to get started with the latest technology in the industry. Combined with real-world scenarios and use cases, the Containers and Microservices Bootcamp, led by Janakiram MSV, a Microsoft Regional Director, will include presentations as well as hands-on demos and comprehensive walkthroughs.
Sep. 4, 2015 11:00 AM EDT Reads: 436
17th Cloud Expo, taking place Nov 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA, will feature technical sessions from a rock star conference faculty and the leading industry players in the world. Cloud computing is now being embraced by a majority of enterprises of all sizes. Yesterday's debate about public vs. private has transformed into the reality of hybrid cloud: a recent survey shows that 74% of enterprises have a hybrid cloud strategy. Meanwhile, 94% of enterprises are using some form of XaaS – software, platform, and infrastructure as a service.
Sep. 4, 2015 11:00 AM EDT Reads: 1,622
SYS-CON Events announced today that the "Second Containers & Microservices Expo" will take place November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Containers and microservices have become topics of intense interest throughout the cloud developer and enterprise IT communities.
Sep. 4, 2015 10:45 AM EDT Reads: 671
Akana has announced the availability of the new Akana Healthcare Solution. The API-driven solution helps healthcare organizations accelerate their transition to being secure, digitally interoperable businesses. It leverages the Health Level Seven International Fast Healthcare Interoperability Resources (HL7 FHIR) standard to enable broader business use of medical data. Akana developed the Healthcare Solution in response to healthcare businesses that want to increase electronic, multi-device access to health records while reducing operating costs and complying with government regulations.
Sep. 4, 2015 09:30 AM EDT Reads: 340
Containers are not new, but renewed commitments to performance, flexibility, and agility have propelled them to the top of the agenda today. By working without the need for virtualization and its overhead, containers are seen as the perfect way to deploy apps and services across multiple clouds. Containers can handle anything from file types to operating systems and services, including microservices. What are microservices? Unlike what the name implies, microservices are not necessarily small, but are focused on specific tasks. The ability for developers to deploy multiple containers – thous...
Sep. 4, 2015 09:00 AM EDT Reads: 229