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RetryDriver.java
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RetryDriver.java
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/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.facebook.presto.hive;
import com.google.common.collect.ImmutableList;
import io.airlift.log.Logger;
import io.airlift.units.Duration;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.TimeUnit;
import static com.google.common.base.Preconditions.checkNotNull;
public class RetryDriver
{
private static final Logger log = Logger.get(RetryDriver.class);
private static final int DEFAULT_RETRY_ATTEMPTS = 10;
private static final Duration DEFAULT_SLEEP_TIME = Duration.valueOf("1s");
private static final Duration DEFAULT_MAX_RETRY_TIME = Duration.valueOf("30s");
private static final double DEFAULT_SCALE_FACTOR = 2.0;
private final int maxAttempts;
private final Duration minSleepTime;
private final Duration maxSleepTime;
private final double scaleFactor;
private final Duration maxRetryTime;
private final List<Class<? extends Exception>> exceptionWhiteList;
private RetryDriver(
int maxAttempts,
Duration minSleepTime,
Duration maxSleepTime,
double scaleFactor,
Duration maxRetryTime,
List<Class<? extends Exception>> exceptionWhiteList)
{
this.maxAttempts = maxAttempts;
this.minSleepTime = minSleepTime;
this.maxSleepTime = maxSleepTime;
this.scaleFactor = scaleFactor;
this.maxRetryTime = maxRetryTime;
this.exceptionWhiteList = exceptionWhiteList;
}
private RetryDriver()
{
this(DEFAULT_RETRY_ATTEMPTS,
DEFAULT_SLEEP_TIME,
DEFAULT_SLEEP_TIME,
DEFAULT_SCALE_FACTOR,
DEFAULT_MAX_RETRY_TIME,
ImmutableList.<Class<? extends Exception>>of());
}
public static RetryDriver retry()
{
return new RetryDriver();
}
public final RetryDriver maxAttempts(int maxAttempts)
{
return new RetryDriver(maxAttempts, minSleepTime, maxSleepTime, scaleFactor, maxRetryTime, exceptionWhiteList);
}
public final RetryDriver exponentialBackoff(Duration minSleepTime, Duration maxSleepTime, Duration maxRetryTime, double scaleFactor)
{
return new RetryDriver(maxAttempts, minSleepTime, maxSleepTime, scaleFactor, maxRetryTime, exceptionWhiteList);
}
@SafeVarargs
public final RetryDriver stopOn(Class<? extends Exception>... classes)
{
checkNotNull(classes, "classes is null");
List<Class<? extends Exception>> exceptions = ImmutableList.<Class<? extends Exception>>builder()
.addAll(exceptionWhiteList)
.addAll(Arrays.asList(classes))
.build();
return new RetryDriver(maxAttempts, minSleepTime, maxSleepTime, scaleFactor, maxRetryTime, exceptions);
}
public RetryDriver stopOnIllegalExceptions()
{
return stopOn(NullPointerException.class, IllegalStateException.class, IllegalArgumentException.class);
}
public <V> V run(String callableName, Callable<V> callable)
throws Exception
{
checkNotNull(callableName, "callableName is null");
checkNotNull(callable, "callable is null");
long startTime = System.nanoTime();
int attempt = 0;
while (true) {
attempt++;
try {
return callable.call();
}
catch (Exception e) {
for (Class<? extends Exception> clazz : exceptionWhiteList) {
if (clazz.isInstance(e)) {
throw e;
}
}
if (attempt >= maxAttempts || Duration.nanosSince(startTime).compareTo(maxRetryTime) >= 0) {
throw e;
}
log.debug("Failed on executing %s with attempt %d, will retry. Exception: %s", callableName, attempt, e.getMessage());
int delayInMs = (int) Math.min(minSleepTime.toMillis() * Math.pow(scaleFactor, attempt - 1), maxSleepTime.toMillis());
TimeUnit.MILLISECONDS.sleep(delayInMs);
}
}
}
}