org.apache.pulsar.client.util.RetryUtil Maven / Gradle / Ivy
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* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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
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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.pulsar.client.util;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.function.Supplier;
import org.apache.pulsar.common.util.Backoff;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class RetryUtil {
private static final Logger log = LoggerFactory.getLogger(RetryUtil.class);
public static void retryAsynchronously(Supplier> supplier, Backoff backoff,
ScheduledExecutorService scheduledExecutorService,
CompletableFuture callback) {
if (backoff.getMax() <= 0) {
throw new IllegalArgumentException("Illegal max retry time");
}
if (backoff.getInitial() <= 0) {
throw new IllegalArgumentException("Illegal initial time");
}
scheduledExecutorService.execute(() ->
executeWithRetry(supplier, backoff, scheduledExecutorService, callback));
}
private static void executeWithRetry(Supplier> supplier, Backoff backoff,
ScheduledExecutorService scheduledExecutorService,
CompletableFuture callback) {
supplier.get().whenComplete((result, e) -> {
if (e != null) {
long next = backoff.next();
boolean isMandatoryStop = backoff.isMandatoryStopMade();
if (isMandatoryStop) {
callback.completeExceptionally(e);
} else {
log.warn("Execution with retry fail, because of {}, will retry in {} ms", e.getMessage(), next);
scheduledExecutorService.schedule(() ->
executeWithRetry(supplier, backoff, scheduledExecutorService, callback),
next, TimeUnit.MILLISECONDS);
}
return;
}
callback.complete(result);
});
}
}