Exception handling is a means of responding to error conditions in a program in a more organized way. There are Perl modules on CPAN to make this job easier.
This is the material that I prepared for gathering best practices in exception handling that we aim to follow. I used the content stated in the references section.
The Exception Handling in Java is one amongst the powerful mechanism to handle the runtime errors so traditional flow of the program will be maintained.
Applet is a special type of program that is embedded in the webpage to generate the dynamic content.
JAVA EXCEPTION HANDLING
N.V.Raja Sekhar Reddy
www.technolamp.co.in
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The article describes a new direction in development of static code analyzers - verification of parallel programs. The article reviews several static analyzers which can claim to be called "Parallel Lint".
Computations involving geographic coordinates are commonplace today with maps and location-based services. There are many modules on CPAN which can help Perl programmers to do these computations more easily. Examples are provided where Perl was used to generate the search grid for a missing rocket payload on a large dry lakebed in Nevada, and for mapping progress of a high-altitude balloon over Central California and the teams who were chasing it.
This is the material that I prepared for gathering best practices in exception handling that we aim to follow. I used the content stated in the references section.
The Exception Handling in Java is one amongst the powerful mechanism to handle the runtime errors so traditional flow of the program will be maintained.
Applet is a special type of program that is embedded in the webpage to generate the dynamic content.
JAVA EXCEPTION HANDLING
N.V.Raja Sekhar Reddy
www.technolamp.co.in
Want more interesting...
Watch and Like us @ https://www.facebook.com/Technolamp.co.in
subscribe videos @ http://www.youtube.com/user/nvrajasekhar
The article describes a new direction in development of static code analyzers - verification of parallel programs. The article reviews several static analyzers which can claim to be called "Parallel Lint".
Computations involving geographic coordinates are commonplace today with maps and location-based services. There are many modules on CPAN which can help Perl programmers to do these computations more easily. Examples are provided where Perl was used to generate the search grid for a missing rocket payload on a large dry lakebed in Nevada, and for mapping progress of a high-altitude balloon over Central California and the teams who were chasing it.
This describes writing command-line processing for Perl scripts. Don't re-invent the wheel - this problem has been solved. Use Getopt::Long or a similar module from CPAN.
This was presented as one of several "lightning talk" mini-presenations at the Silicon Valley Perl (SVPerl) meeting on Thursday, November 12, 2015 where the primary meeting topic was CPAN, the Comprehensive Perl Archive Network with the tag line "Your project is already half done".
These are slides from the presentation "Aerospace Applications of Perl" given by Ian Kluft at Silicon Valley Perl on March 3, 2016 in Santa Clara, California. It explores aerospace topics and related CPAN modules, with some Perl coding examples.
Presentation by Ian Kluft at California Meteorite Club in Escondido CA on September 14, 2014 about the theory of a newly-discovered impact structure at Nevada's Black Rock Desert. More info is at http://www.blackrocknevada.info/impact-crater/ .
Ryan Goulding and Colin Dixon's presentation from the 2017 Open Networking Summit on Making Strongly-typed NETCONF Usable.
NETCONF's use of strongly-typed YANG to describe device configuration makes safe and robust device configuration possible, but also exposes complexities in operation. Most deployments choose to use a controller or management system to help with issues of inventory and credential management. Further, this controller often does sanity checks to ensure that operations are likely to be successful on devices and, if not, there is useful debugging information. Frustratingly, this exposes trade-offs between relying on strict enforcement of YANG to catching errors early and more relaxed behavior to enable compatibility with imperfect NETCONF implementations in the real world. We show how we navigated these trade-offs to provide a flexible, open-source NETCONF solution that is strongly-typed and enables simple configuration changes for compatibility with imperfect NETCONF implementations.
unit 4 msbte syallbus for sem 4 2024-2025AKSHAYBHABAD5
The Intel 8086 microprocessor, designed by Intel in the late 1970s, is an 8-bit/16-bit microprocessor and the first member of the x86 family of microprocessors1. Here’s a brief overview of its internal architecture:
Complex Instruction Set Computer (CISC) Architecture: The 8086 microprocessor is based on a CISC architecture, which supports a wide range of instructions, many of which can perform multiple operations in a single instruction1.
Bus Interface Unit (BIU): The BIU is responsible for fetching instructions from memory and decoding them, while also managing data transfer between the microprocessor and memory or I/O devices1.
Execution Unit (EU): The EU executes the instructions1.
Memory Segmentation: The 8086 microprocessor has a segmented memory architecture, which means that memory is divided into segments that are addressed using both a segment register and an offset1.
Registers: The 8086 microprocessor has a rich set of registers, including general-purpose registers, segment registers, and special registers
Exceptions are a powerful mechanism for centralized processing of errors and exceptional situations. This mechanism replaces the procedure-oriented method of error handling in which each function returns a code indicating an error or a successful execution.
"#AprilFools Hijinks" at SVPerl April 2021 meetingIan Kluft
Slides from the SVPerl monthly meeting of April 1, 2021 on "April Fools Hijinks" in the Perl community. This was the second of two short presentations at the meeting.
There's a lot of Perl code out there and more being written all the time. Ian Kluft presented current advice on secure coding in Perl, including language-specific guidelines from the Perl documentation, CMU Software Engineering Institute Perl Coding Standard, Common Weakness Enumeration(CWE) and general advice from OWASP Top 10.
Securing a Raspberry Pi and other DIY IoT devicesIan Kluft
These are the slides from the presentation by Ian Kluft at the ISC² Silicon Valley Chapter meeting on February 11, 2020 in Santa Clara, California on "Securing a Raspberry Pi and other DIY IoT devices". It introduces the Raspberry Pi computer and security issues relevant to projects on similar Internet of Things (IoT) devices. Also, for hobby projects there's advice how to prioritize security issues to avoid being overwhelmed. It covers analysis of the project's attack surface and online security resources. The presentation was made for a group who have or are working on cybersecurity certifications. But the slides should also be understandable by a wider technical audience.
Best Practices for Recovering Rocket & Balloon PayloadsIan Kluft
Recommendations for tracking and search for high-altitude rocket and balloon payloads based on experience from the Stratofox Aerospace Tracking Team
This was an alternate presentation in case any speakers did not show up at Space Access 2019 in Fremont, California - the organizers asked to have this ready just in case. However, it was not presented because no gaps occurred in the schedule.
PiFlash: Linux utility to flash SD cards for Raspberry Pi computersIan Kluft
Presentation by Ian Kluft at Silicon Valley Perl (SVPerl) on Feb 7, 2019 on "PiFlash: Linux utility to flash SD cards for Raspberry Pi computers". This tool is for use on Linux systems in place of manual procedures to write SD cards to boot a Raspberry Pi board. Safety features for newcomers include checking the destination device and refusing to erase any device that isn't an SD card. Handy automation for experience users includes automatically extracting the OS image from a tar/zip archive and uncompressing it to the SD card in one step.
"Code Generation in Perl" presented to Silicon Valley Perl in Santa Clara CA by Ian Kluft on September 7, 2017. The presentation surveys the landscape of code generation tools and techniques including preprocessers, compliers and model languages, as well as CPAN modules to help with those tasks. Code generation has always been useful for automation of tedious tasks. There is also some debunking of myths from science fiction about what is currently possible with code generation. No matter how much processing is involved, at some level someone still has to write the programs.
GraphRAG is All You need? LLM & Knowledge GraphGuy Korland
Guy Korland, CEO and Co-founder of FalkorDB, will review two articles on the integration of language models with knowledge graphs.
1. Unifying Large Language Models and Knowledge Graphs: A Roadmap.
https://arxiv.org/abs/2306.08302
2. Microsoft Research's GraphRAG paper and a review paper on various uses of knowledge graphs:
https://www.microsoft.com/en-us/research/blog/graphrag-unlocking-llm-discovery-on-narrative-private-data/
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
In his public lecture, Christian Timmerer provides insights into the fascinating history of video streaming, starting from its humble beginnings before YouTube to the groundbreaking technologies that now dominate platforms like Netflix and ORF ON. Timmerer also presents provocative contributions of his own that have significantly influenced the industry. He concludes by looking at future challenges and invites the audience to join in a discussion.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
Alt. GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using ...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
Pushing the limits of ePRTC: 100ns holdover for 100 daysAdtran
At WSTS 2024, Alon Stern explored the topic of parametric holdover and explained how recent research findings can be implemented in real-world PNT networks to achieve 100 nanoseconds of accuracy for up to 100 days.
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
SAP Sapphire 2024 - ASUG301 building better apps with SAP Fiori.pdfPeter Spielvogel
Building better applications for business users with SAP Fiori.
• What is SAP Fiori and why it matters to you
• How a better user experience drives measurable business benefits
• How to get started with SAP Fiori today
• How SAP Fiori elements accelerates application development
• How SAP Build Code includes SAP Fiori tools and other generative artificial intelligence capabilities
• How SAP Fiori paves the way for using AI in SAP apps
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
Le nuove frontiere dell'AI nell'RPA con UiPath Autopilot™UiPathCommunity
In questo evento online gratuito, organizzato dalla Community Italiana di UiPath, potrai esplorare le nuove funzionalità di Autopilot, il tool che integra l'Intelligenza Artificiale nei processi di sviluppo e utilizzo delle Automazioni.
📕 Vedremo insieme alcuni esempi dell'utilizzo di Autopilot in diversi tool della Suite UiPath:
Autopilot per Studio Web
Autopilot per Studio
Autopilot per Apps
Clipboard AI
GenAI applicata alla Document Understanding
👨🏫👨💻 Speakers:
Stefano Negro, UiPath MVPx3, RPA Tech Lead @ BSP Consultant
Flavio Martinelli, UiPath MVP 2023, Technical Account Manager @UiPath
Andrei Tasca, RPA Solutions Team Lead @NTT Data
FIDO Alliance Osaka Seminar: Passkeys and the Road Ahead.pdf
Exception Handling in Perl
1. Presented at SVPerl
July 7, 2011
Exception Handling in Perl
By Ian Kluft
Slide 1 of 14
Exception Handling in Perl
Presented by Ian Kluft
Silicon Valley Perl
July 7, 2011
Santa Clara, California
2. Presented at SVPerl
July 7, 2011
Exception Handling in Perl
By Ian Kluft
Slide 2 of 14
Exception Handling in Perl
Three parts to this presentation
● What is exception handling?
● Exception handling modules for Perl
● Using exception handling in your Perl code
3. Presented at SVPerl
July 7, 2011
Exception Handling in Perl
By Ian Kluft
Slide 3 of 14
What is Exception Handling?
● Method of error handling
● Exception is an error which can be
caught by a calling function
● Exception unrolls function calls
until one catches it
● Contains structured data about
error, not just numeric code
4. Presented at SVPerl
July 7, 2011
Exception Handling in Perl
By Ian Kluft
Slide 4 of 14
Exception Handling in the News
● Don't forget to catch exceptions in your code
● Highest profile example: Ariane 501 accident
● June 4, 1996 in Kourou, French Guiana
● ESA space rocket exploded 36 seconds into flight
● Accident investigators found software crashed on
test bench 36 seconds into simulated flight (!!!)
● Integer counter overflow exception was not caught
● Software was only tested with Ariane 4 flight profile
● Ariane 5 overflowed a horizontal motion counter
5. Presented at SVPerl
July 7, 2011
Exception Handling in Perl
By Ian Kluft
Slide 5 of 14
Causes of Exceptions
● Exceptions may be caused by fatal error in
code or system call
● If the program signals an exception itself, it is
called “throwing” an exception
● Most Perl code uses simple form of throwing
exceptions
open FILE, “foo” or die “open failed: $!”
6. Presented at SVPerl
July 7, 2011
Exception Handling in Perl
By Ian Kluft
Slide 6 of 14
Mechanism of Catching Exceptions
● Exceptions can be caught in Perl with eval()
● This is just showing you how it works
● Don't re-invent the wheel
● There are modules for this
eval {
... code to do something ...
};
if ($@) {
handle_error($@);
}
7. Presented at SVPerl
July 7, 2011
Exception Handling in Perl
By Ian Kluft
Slide 7 of 14
Exception Handling Modules
CPAN has many exception handling modules
● Exception::Class is recommended, shown here
● Exception::Lite also currently maintained
● Error adds try/catch style to Perl syntax
● Exception::System – catch system call errors
● Exception (not currently maintained)
● Class::Throwable (not currently maintained)
● Some module sets use own exception handling
8. Presented at SVPerl
July 7, 2011
Exception Handling in Perl
By Ian Kluft
Slide 8 of 14
Exception::Class
● Exceptions are classes inheriting from
Exception::Class or your subclasses of it
● You can organize exceptions hierarchically
● Exception::Class::Base offers handler code
● Using classes sets exceptions at compile time
9. Presented at SVPerl
July 7, 2011
Exception Handling in Perl
By Ian Kluft
Slide 9 of 14
Exception::Class declaration
From manual page:
use Exception::Class
( 'MyException',
'AnotherException' =>
{ isa => 'MyException' },
'YetAnotherException' =>
{ isa => 'AnotherException',
description => 'These exceptions are related to IPC' },
'ExceptionWithFields' =>
{ isa => 'YetAnotherException',
fields => [ 'grandiosity', 'quixotic' ],
alias => 'throw_fields',
},
);
10. Presented at SVPerl
July 7, 2011
Exception Handling in Perl
By Ian Kluft
Slide 10 of 14
Exception::Class usage
From manual page:
# try
eval { MyException->throw( error => 'I feel funny.' ) };
my $e;
# catch
if ( $e = Exception::Class->caught('MyException') ) {
warn $e->error, "n", $e->trace->as_string, "n";
warn join ' ', $e->euid, $e->egid, $e->uid, $e->gid,
$e->pid, $e->time;
exit;
} elsif ( $e = Exception::Class->caught('ExceptionWithFields') ) {
$e->quixotic ? do_something_wacky() : do_something_sane();
} else {
$e = Exception::Class->caught();
ref $e ? $e->rethrow : die $e;
}
11. Presented at SVPerl
July 7, 2011
Exception Handling in Perl
By Ian Kluft
Slide 11 of 14
Wrapping main in exception handler
● Good practice... no! This is a best practice.
● To catch all exceptions, make main() an
exception handler wrapper
● Adapt manual page code from previous slide
● Catch Exception::Class exceptions
● Then report unknown errors, like die()
● More graceful exit for program
12. Presented at SVPerl
July 7, 2011
Exception Handling in Perl
By Ian Kluft
Slide 12 of 14
Building depth into error reporting
● Exception classes can be configured to collect
stack traces
● Data structures can be passed from error
recognition point to error reporting code
● Exception::Class::DBI integrates w/ DBI code
● Catch unexpected database errors
● Make a sane error report to user
● Mail notification about database errors to DBAs
13. Presented at SVPerl
July 7, 2011
Exception Handling in Perl
By Ian Kluft
Slide 13 of 14
Exceptions with text descriptions
● All errors can and should have text descriptions
● Error reporting and documentation can be
much more organized
● Extract error documentation from Perl code
● Document for engineers what causes that error
● Document for user/operator what to do when
they see that error
● Document for support dept what it means when
customer calls with that error
14. Presented at SVPerl
July 7, 2011
Exception Handling in Perl
By Ian Kluft
Slide 14 of 14
Perl Exception Handling: go do it!
● Everything is easier when you design it in
● But this can be added to existing code
● First, add exception-handler wrapper(s)
● Then, define exception classes as needed
● Replace error codes with throwing exceptions
● Both can exist during transition
● Goal: get rid of numeric error codes!