Возможно, стоит пояснить разницу между синхронизацией из thread/process-safe и синхронизацией с помощью Lock🤔
Наша задача — заставить разные процессы и потоки обращаться к базе данных (или любым другим ресурсам) последовательно. Чтобы не случилось так называемого race condition, то есть состояние гонки. Это когда разные потоки или процессы пытаются одновременно что-то сделать с одним и тем же ресурсом.
В этом случае нам нужна какая-то логика ограничения. Пока один процесс не завершил своё действие, другие не могут получить доступ к ресурсу.
Так вот, thread-safe и process-safe означает что отдельно взятые операции записи в БД гарантированно будут последовательны. Запросы из разных процессов или потоков выстроятся в очередь и не будут мешать друг другу. Лучше всего когда этот блок реализован на уровне БД в виде атомарных операций или ещё как-то.
Но зачем нам тогда еще дополнительный Lock?
Этот способ синхронизации используется когда процесс никак не укладывается в одно действие и должен сделать множество операций прежде чем дать доступ следующему. В этом случае процесс ставит некий глобальный Lock на ресурс и никто другой, даже получив законное право на доступ, не может ничего сделать. Все ждут пока этот Lock не будет снят.
Это решается на уровне приложения и правильность реализации полностью в вашей ответственности. Например, если забыли разблокировать или сделали перекрёстный Lock (Deadlock как на картинке), то всё зависнет в бесконечном ожидании.
#basic
#FactFriday
Feeling thirsty is a late indicator of dehydration. To support optimal body function, it is important to drink water consistently throughout the day, even before thirst occurs. Staying adequately hydrated is essential for overall health.✅
#FactFriday#NCDCNigeria
🧼#FactFriday
Did you know? With proper hygiene, communicable diseases are preventable!
Washing your hands, keeping your environment clean, and practicing good personal hygiene can help stop the spread of infections.
Stay informed. Stay safe. #TakeResponsibility
What you eat matters more than you think.
✅Good nutrition fuels your body, strengthens your immune system, and helps you resist infections like flu, cholera, and other communicable diseases.
Healthy choices today, stronger immunity tomorrow.💪
#FactFriday#HealthyLiving#NCDCNigeria
#FactFriday
Contaminated water can spread illnesses which affects millions of people every year. Clean water and proper hygiene practices can greatly reduce health risks and improve wellbeing.
Protect yourself and your loved ones by:
✔️ Drinking only safe and clean water
✔️ Practicing good hand hygiene: Wash hands with soap under clean running water
✔️ Keeping your environment clean and free from waste
✔️ Following public health guidelines on sanitation
✨Your small daily actions can prevent big health problems.
Drink Clean, Stay Safe, Stay Healthy!
#FactFriday#HealthyLiving#NCDCNigeria
#FactFriday: _Powering your mind, even at rest! ✨_
🧠 Did you know your brain uses about 20% of your body’s energy even when you’re resting?
This energy keeps your brain cells active, helps process information, regulates your body systems, and keeps you alert.
💡 Take care of your brain with:
🍎 Proper nutrition
😴 Enough sleep
🧘 Regular self-care
Stay healthy, stay sharp!
#FactFriday#HealthyLiving#NCDCNigeria
#FactFriday
Drinking enough water daily helps you stay active, refreshed, and ready to take on the day. 💧
Small habits make a big difference! 💪
#FactFriday#HealthyLiving#NCDCNigeria
#FactFriday
Clean hands is one of the simplest and most effective ways to stay healthy and protect those around you from diseases👌
Washing your hands with soap under clean running water for just 20 seconds can reduce your risk of infection by up to 50%? 🙌🏽
Make handwashing a daily habit ✅️
#FactFriday#HandHygiene#HealthyLiving#NCDCNigeria
#FactFriday
Every year, mosquitoes are responsible for over 700,000 deaths by spreading diseases like malaria, dengue, and yellow fever.
💡 Protect yourself:
✅ Sleep under insecticide-treated nets
✅ Eliminate stagnant water around your home
✅ Use mosquito repellents
Small insect, Big threat.
Take action today!📌
#FactFriday#MosquitoFacts#NCDCNigeria
#FactFriday
Feeling better doesn’t mean the infection is gone.
Stopping antibiotics without proper guidance can fuel Antimicrobial Resistance (AMR) making infections harder to treat.
✔️Always follow your healthcare provider’s advice.
✔️ Only use antibiotics when prescribed
✔️ Always complete your dose
✔️ Take antibiotics exactly as prescribed
✔️ Don’t stop, skip, or share medications.
✅Your actions today protect your health tomorrow.!
#FactFriday#StopAMR#PublicHealth#NCDCNigeria
#FactFriday: Good Food, Good You!
🥬🥦Adding more fruits and vegetables to your meals can be a game changer for your health. They are filled with Vitamins, Minerals and fiber that helps boost your immunity, Protect your heart and lower the risk of chronic diseases.
Healthy eating starts with fruits and Vegetables✅️
#FactFriday#HealthyLiving#HealthyHabits#NCDCNigeria.
#FactFriday
💡 Did you know?
Not all bacteria are harmful. In fact, many are beneficial — helping your body digest food, absorb nutrients, and maintain a healthy immune system.
Understanding the role of good bacteria is key to making informed decisions about hygiene, antibiotics, and overall health.
#FactFriday#NCDCNigeria#TakeResponsibility#PublicHealthFacts
#FactFriday
💡With proper hygiene, safe practices, and protective measures, dangerous communicable diseases like Ebola can be prevented or controlled? 👐
Staying informed and taking responsibility keeps you and your community safe.
✔️ Practice good hygiene
✔️ Follow health guidelines
✔️ Stay alert and protect others
#TakeResponsibility#StaySafe#NCDCGov