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July 14, 2017 12:37
Guava rate limiter
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private RateLimiter createGuavaRateLimiter() { | |
double permitsPerSecond = ((double) hourlyLimit) / (60d * 60); // hourlyLimit / seconds-per-hour | |
logger.info("Creating rate limiter with {} permits per seconds", permitsPerSecond); | |
RateLimiter rateLimiter = RateLimiter.create(permitsPerSecond); | |
// initialize with a full number of permits. Use refleciton, as guava does not expose that functionality | |
try { | |
Class<?> limiterClass = Class.forName("com.google.common.util.concurrent.SmoothRateLimiter"); | |
Field field = ReflectionUtils.findField(limiterClass, "storedPermits"); | |
ReflectionUtils.makeAccessible(field); | |
ReflectionUtils.setField(field, rateLimiter, hourlyLimit); | |
Field maxField = ReflectionUtils.findField(limiterClass, "maxPermits"); | |
ReflectionUtils.makeAccessible(maxField); | |
ReflectionUtils.setField(maxField, rateLimiter, hourlyLimit); | |
Field burstField = ReflectionUtils.findField(Class.forName("com.google.common.util.concurrent.SmoothRateLimiter$SmoothBursty"), "maxBurstSeconds"); | |
ReflectionUtils.makeAccessible(burstField); | |
setFinal(burstField, rateLimiter, 10); | |
} catch (Exception ex) { | |
throw new RuntimeException(ex); | |
} | |
return rateLimiter; | |
} |
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