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High-performance distributed sync service and atomic DB. Provides good multi-core support through lock queues, high-performance asynchronous binary network protocols. Can be used for spikes, synchronization, event notification, concurrency control. https://github.com/snower/slock
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package io.github.snower.jaslock.spring.boot.aspects;
import io.github.snower.jaslock.MaxConcurrentFlow;
import io.github.snower.jaslock.exceptions.LockTimeoutException;
import io.github.snower.jaslock.exceptions.SlockException;
import io.github.snower.jaslock.spring.boot.AbstractBaseAspect;
import io.github.snower.jaslock.spring.boot.SlockTemplate;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
@Aspect
@Order(Ordered.HIGHEST_PRECEDENCE + 8000)
public class MaxConcurrentFlowAspect extends AbstractBaseAspect {
private static final Logger logger = LoggerFactory.getLogger(MaxConcurrentFlowAspect.class);
public MaxConcurrentFlowAspect(SlockTemplate slockTemplate) {
super(slockTemplate);
}
@Pointcut("@annotation(io.github.snower.jaslock.spring.boot.annotations.MaxConcurrentFlow)")
private void MaxConcurrentFlow() {}
@Around("MaxConcurrentFlow()")
public Object around(ProceedingJoinPoint joinPoint) throws Throwable {
MethodInvocationProceedingJoinPoint methodJoinPoint = (MethodInvocationProceedingJoinPoint) joinPoint;
MethodSignature methodSignature = (MethodSignature) methodJoinPoint.getSignature();
io.github.snower.jaslock.spring.boot.annotations.MaxConcurrentFlow maxConcurrentFlowAnnotation = methodSignature.getMethod()
.getAnnotation(io.github.snower.jaslock.spring.boot.annotations.MaxConcurrentFlow.class);
if (maxConcurrentFlowAnnotation == null) {
throw new IllegalArgumentException("unknown MaxConcurrentFlow annotation");
}
String templateKey = maxConcurrentFlowAnnotation.value();
if (isBlank(templateKey)) {
templateKey = maxConcurrentFlowAnnotation.key();
if (isBlank(templateKey)) {
throw new IllegalArgumentException("key is empty");
}
}
String key = evaluateKey(templateKey, methodSignature.getMethod(), methodJoinPoint.getArgs(), methodJoinPoint.getThis());
if (isBlank(key)) {
return joinPoint.proceed();
}
MaxConcurrentFlow maxConcurrentFlow = maxConcurrentFlowAnnotation.databaseId() >= 0 && maxConcurrentFlowAnnotation.databaseId() < 127 ?
slockTemplate.selectDatabase(maxConcurrentFlowAnnotation.databaseId())
.newMaxConcurrentFlow(key, maxConcurrentFlowAnnotation.count(),
maxConcurrentFlowAnnotation.timeout(), maxConcurrentFlowAnnotation.expried()) :
slockTemplate.newMaxConcurrentFlow(key, maxConcurrentFlowAnnotation.count(),
maxConcurrentFlowAnnotation.timeout(), maxConcurrentFlowAnnotation.expried());
try {
maxConcurrentFlow.acquire();
try {
return joinPoint.proceed();
} finally {
try {
maxConcurrentFlow.release();
} catch (Exception e) {
logger.warn("Slock MaxConcurrentFlowAspect release {} error {}", templateKey, e, e);
}
}
} catch (LockTimeoutException e) {
if (!maxConcurrentFlowAnnotation.timeoutException().isInstance(e)) {
throw maxConcurrentFlowAnnotation.timeoutException().getConstructor(String.class, Throwable.class)
.newInstance(e.getMessage(), e);
} else {
throw e;
}
} catch (SlockException e) {
if (!maxConcurrentFlowAnnotation.exception().isInstance(e)) {
throw maxConcurrentFlowAnnotation.exception().getConstructor(String.class, Throwable.class)
.newInstance(e.getMessage(), e);
} else {
throw e;
}
}
}
}