Code Explainers

Code explainers tagged #thread-safety

java 
public class SlidingLogRateLimiter {
 
    private final int maxRequests;
    private final long windowMillis;

How a sliding-log rate limiter works

rate-limiting concurrency sliding-window
Advanced 8 steps
java 
public final class TokenBucketRateLimiter {
 
    private final long capacity;
    private final double refillTokensPerNano;

How a token bucket rate limiter works

rate-limiting concurrency token-bucket
Intermediate 8 steps
ruby 
require 'monitor'
 
class TokenBucket
  include MonitorMixin

A thread-safe token bucket rate limiter in Ruby

rate-limiting concurrency thread-safety
Intermediate 8 steps
java 
public class EventBus {
 
    private final Map<Class<?>, List<Subscriber>> subscribers = new ConcurrentHashMap<>();
    private final Executor executor;

Building an annotation-driven EventBus in Java

publish-subscribe reflection annotations
Intermediate 7 steps
go 
package metrics
 
import (
	"sync/atomic"

A lock-free request counter in Go

concurrency atomics lock-free
Intermediate 6 steps
java 
import java.util.concurrent.atomic.AtomicInteger;
 
public final class RequestCounter {
 

A thread-safe request counter with AtomicInteger

concurrency atomics lock-free
Intermediate 6 steps
java 
public final class Debouncer<T> {
 
    private final ScheduledExecutorService scheduler =
            Executors.newSingleThreadScheduledExecutor(runnable -> {

How a debouncer collapses bursts in Java

debounce concurrency scheduling
Intermediate 9 steps
python 
import time
from collections import defaultdict
from threading import Lock
 

Sliding-window login rate limiting in Flask

rate-limiting sliding-window thread-safety
Intermediate 7 steps
java 
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.math.BigInteger;
 

A thread-safe memoized factorial cache

memoization thread-safety caching
Intermediate 6 steps
java 
import java.time.Duration;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;

A safe recurring heartbeat scheduler in Java

concurrency scheduling thread-safety
Intermediate 6 steps
ruby 
class ThreadSafeCounter
  def initialize(initial = 0)
    @count = initial
    @mutex = Mutex.new

A thread-safe counter with Mutex in Ruby

concurrency mutex thread-safety
Intermediate 6 steps
go 
package main
 
import "sync"
 

Mutex vs RWMutex in Go

concurrency mutex synchronization
Intermediate 6 steps