This document discusses synchronization in multithreaded applications in Java. It covers key concepts like monitors, synchronized methods and statements, and inter-thread communication using wait(), notify(), and notifyAll() methods. Synchronized methods ensure only one thread can access a shared resource at a time by acquiring the object's monitor. synchronized statements allow synchronizing access to non-synchronized methods. Inter-thread communication allows threads to wait for notifications from other threads rather than busy waiting.
Thread Synchronization:
A single flow of execution logic in a program.
Enable your program to perform concurrent processing.
Increases efficiency and responsiveness.
Share resources.
Unpredictable execution order.
Thread Synchronization:
A single flow of execution logic in a program.
Enable your program to perform concurrent processing.
Increases efficiency and responsiveness.
Share resources.
Unpredictable execution order.
This presentation is about advanced multithreading and concurrency in Java. I have tried my best to explain the concepts with code. Feel free to reach me if you have any questions or concerns.
Advanced Introduction to Java Multi-Threading - Full (chok)choksheak
Designed for the beginning Java developer to grasp advanced Java multi-threading concepts quickly. Talks mainly about the Java Memory Model and the Concurrent Utilities. This presentation is Java-specific and we intentionally omit general non-Java-specific details, such as hardware architecture, OS, native threads, algorithms, and general software design principles etc.
Processes and Threads, Runnable Interface and Thread Class Thread Objects, Defining and Starting a Thread, Pausing Execution with Sleep, Interrupts, Thread States, Joins, Synchronization
This presentation is about advanced multithreading and concurrency in Java. I have tried my best to explain the concepts with code. Feel free to reach me if you have any questions or concerns.
Advanced Introduction to Java Multi-Threading - Full (chok)choksheak
Designed for the beginning Java developer to grasp advanced Java multi-threading concepts quickly. Talks mainly about the Java Memory Model and the Concurrent Utilities. This presentation is Java-specific and we intentionally omit general non-Java-specific details, such as hardware architecture, OS, native threads, algorithms, and general software design principles etc.
Processes and Threads, Runnable Interface and Thread Class Thread Objects, Defining and Starting a Thread, Pausing Execution with Sleep, Interrupts, Thread States, Joins, Synchronization
Lecture Presentation on Trigonometry, types of angle, angle measurement, pythagorean theorem, trigonometric function, trigonometric relationship, circle function, co function, reference angle, odd even function,graphing of trigonometric function, special angles and terminology and history of trigonometry
Threads are lightweight processes as the overhead of switching between threads is less
Synchronization allows only one thread to perform an operation on a object at a time.
Synchronization prevent data corruption
Thread Synchronization-The synchronized methods define critical sections.
You will learn the Deadlock Condition in Threads and Syncronization of Threads
In 5-2020, I and Minh have a sharing session about Sync, Async, and Multi-threading in C#.
We believe this is one of the most important things when working with .Net technology.
This sharing is aiming to Junior Dev, or even Sr Dev or anyone interested in Sync, Async, and Multi-threading.
I hope it will bring you some values.
This presentation will give a brief idea about threads.
This presentation gives you what is required if you are a starter.
This has the lifecycle, multithreading and differences between multithreadind and normal threading.
This presentation even have example programs.
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Essentials of Automations: The Art of Triggers and Actions in FMESafe Software
In this second installment of our Essentials of Automations webinar series, we’ll explore the landscape of triggers and actions, guiding you through the nuances of authoring and adapting workspaces for seamless automations. Gain an understanding of the full spectrum of triggers and actions available in FME, empowering you to enhance your workspaces for efficient automation.
We’ll kick things off by showcasing the most commonly used event-based triggers, introducing you to various automation workflows like manual triggers, schedules, directory watchers, and more. Plus, see how these elements play out in real scenarios.
Whether you’re tweaking your current setup or building from the ground up, this session will arm you with the tools and insights needed to transform your FME usage into a powerhouse of productivity. Join us to discover effective strategies that simplify complex processes, enhancing your productivity and transforming your data management practices with FME. Let’s turn complexity into clarity and make your workspaces work wonders!
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/
Why You Should Replace Windows 11 with Nitrux Linux 3.5.0 for enhanced perfor...SOFTTECHHUB
The choice of an operating system plays a pivotal role in shaping our computing experience. For decades, Microsoft's Windows has dominated the market, offering a familiar and widely adopted platform for personal and professional use. However, as technological advancements continue to push the boundaries of innovation, alternative operating systems have emerged, challenging the status quo and offering users a fresh perspective on computing.
One such alternative that has garnered significant attention and acclaim is Nitrux Linux 3.5.0, a sleek, powerful, and user-friendly Linux distribution that promises to redefine the way we interact with our devices. With its focus on performance, security, and customization, Nitrux Linux presents a compelling case for those seeking to break free from the constraints of proprietary software and embrace the freedom and flexibility of open-source computing.
GridMate - End to end testing is a critical piece to ensure quality and avoid...ThomasParaiso2
End to end testing is a critical piece to ensure quality and avoid regressions. In this session, we share our journey building an E2E testing pipeline for GridMate components (LWC and Aura) using Cypress, JSForce, FakerJS…
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.
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
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.
Unlocking Productivity: Leveraging the Potential of Copilot in Microsoft 365, a presentation by Christoforos Vlachos, Senior Solutions Manager – Modern Workplace, Uni Systems
Threats to mobile devices are more prevalent and increasing in scope and complexity. Users of mobile devices desire to take full advantage of the features
available on those devices, but many of the features provide convenience and capability but sacrifice security. This best practices guide outlines steps the users can take to better protect personal devices and information.
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
Observability Concepts EVERY Developer Should Know -- DeveloperWeek Europe.pdfPaige Cruz
Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
I, a former op, would like to extend an invitation to all application developers to join the observability party will share these foundational concepts to build on:
UiPath Test Automation using UiPath Test Suite series, part 5DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 5. In this session, we will cover CI/CD with devops.
Topics covered:
CI/CD with in UiPath
End-to-end overview of CI/CD pipeline with Azure devops
Speaker:
Lyndsey Byblow, Test Suite Sales Engineer @ UiPath, Inc.
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.
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.
1. Synchronization
• When two or more threads need access to a shared
resource, they need some way to ensure that the resource
will be used by only one thread at a time. The process by
which this is achieved is called synchronization.
• Java provides unique, language-level support for it. Key to
synchronization is the concept of the monitor (also called a
semaphore).
• A monitor is an object that is used as a mutually exclusive
lock, or mutex. Only one thread can own a monitor at a
given time. When a thread acquires a lock, it is said to have
entered the monitor. All other threads attempting to enter
the locked monitor will be suspended until the first thread
exits the monitor. These other threads are said to be
waiting for the monitor. A thread that owns a monitor can
reenter the same monitor if it so desires.
2. • We can synchronize our code in either of two ways. Both
involve the use of the synchronized keyword, and both are
examined here.
• Using synchronized Methods
• The synchronized Statement
• synchronized Methods : All objects have their own implicit
monitor associated with them. To enter an object’s monitor,
just call a method that has been modified with the
synchronized keyword. While a thread is inside a synchronized
method, all other threads that try to call it (or any other
synchronized method) on the same instance have to wait. To
exit the monitor and relinquish control of the object to the
next waiting thread, the owner of the monitor simply returns
from the synchronized method.
3. class callme{
static int i=1;
//synchronized
static void print() {
System.out.print("( HI ");
try { Thread.sleep(1000);
}
catch(InterruptedException e) { System.out.println("Interrupted");
}
System.out.println(i+" )");
i++;
} }
class A extends Thread {
public void run() {
for(int i=1;i<=5;i++)
callme.print();
} }
4. class B extends Thread{
public void run() {
for(int i=1;i<=5;i++)
callme.print();
}
}
class test {
public static void main(String args[])
{
A th1= new A();
th1.start(); // new A().start();
B th2=new B();
th2.start();
}
}
5. ( HI ( HI 1 )
1 )
( HI ( HI 3 )
( HI 3 )
( HI 5 )
( HI 5 )
( HI 7 )
( HI 7 )
( HI 9 )
9 )
• Here the value of variable i is updated in unordered way by both
the threads A and B. The output may change for each run. This can
lead to a series problem if i is some important shared data or a
control flag. The output printing is also not in order. To solve the
problem we need synchronization over the print() method.
• If the print() method is defined as:
synchronized static void print(){---------}
6. • Then the method is synchronized and the output will be->
( HI 1 )
( HI 2 )
( HI 3 )
( HI 4 )
( HI 5 )
( HI 6 )
( HI 7 )
( HI 8 )
( HI 9 )
( HI 10 )
• Also the output will remain same for each run.(As only one thread can
execute the print() method at a time and other thread has to wait for
completion of current call to print method.)
7. • The synchronized Statement: While creating synchronized methods
within classes that you create is an easy and effective means of achieving
synchronization, it will not work in all cases.
• Consider the following. Imagine that we want to synchronize access to
objects of a class that was not designed for multithreaded access. That is,
the class does not use synchronized methods. Further, this class was not
created by us, but by a third party, and we do not have access to the
source code. Thus, we can’t add synchronized to the appropriate methods
within the class. How can access to an object of this class be
synchronized?
• The solution to this problem is quite easy: simply put calls to the methods
defined by this class inside a synchronized block.
synchronized(object) {
// statements to be synchronized
}
• Here, object is a reference to the object being synchronized. A synchronized
block ensures that a call to a method that is a member of object occurs
only after the current thread has successfully entered object’s monitor.
8. class callme{
int i=1; //non-static member
void print() { //non-static member
System.out.print("( HI ");
try { Thread.sleep(1000); }
catch(InterruptedException e) { System.out.println("Interrupted"); }
System.out.println(i+" )");
i++;
} }
class A extends Thread {
callme obj;
A(callme target) { obj=target; }
public void run() {
for(int i=1;i<=5;i++) {
synchronized(obj)
{ obj.print(); } }
} }
9. class B extends Thread{
callme obj;
B(callme target){ obj=target; }
public void run() {
for(int i=1;i<=5;i++)
{ synchronized(obj)
{obj.print(); } }
} }
class test {
public static void main(String args[]) {
callme obj1=new callme();
A th1= new A(obj1);
th1.start(); // new A().start();
B th2=new B(obj1);
th2.start();
}
}
10. • Here both thread are referring to the same instance/object of class
callme. The call to method print() is in synchronized block this time.
( HI 1 )
( HI 2 )
( HI 3 )
( HI 4 )
……..
( HI 9 )
( HI 10 )
So here without changing the original class callme the call to print
method is executed in synchronized block. This will have the same
effect as the previous case.(Where the print method is ynchronized.)
11. Interthread Communication
• Polling is usually implemented by a loop that is used to
check some condition repeatedly. Once the condition is
true, appropriate action is taken. This wastes CPU time.
• To avoid polling, Java includes an elegant interprocess
communication mechanism via the wait( ), notify( ), and
notifyAll( ) methods. These methods are implemented as
final methods in Object, so all classes have them. All three
methods can be called only from within a synchronized
context.
• wait( ) tells the calling thread to give up the monitor and go
to sleep until some other thread enters the same monitor
and calls notify( ).
• notify( ) wakes up the first thread that called wait( ) on the
same object.
• notifyAll( ) wakes up all the threads that called wait( ) on
the same object. The highest priority thread will run first.
12. • These methods are declared within Object, as
shown here:
final void wait( ) throws InterruptedException
final void notify( )
final void notifyAll( )
13. class A {
public static void main(String[]args)throws InterruptedException {
B b =new B();
b.start();
synchronized(b) //thread got lock
{
System.out.println("Calling wait method");
b.wait();
System.out.println("Got notification"); }
System.out.println(b.total);
} }
class B extends Thread{
int total=0;
public void run() {
synchronized (this) //.thread got lock
{
System.out.println("Starting calculation");
for(int i=0;i<=1000;i++) { total=total+I; }
System.out.println("Giving notification call");
notify(); //thread releases lock again }} }