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The official Couchbase JVM Core IO Library
/*
* Copyright (c) 2019 Couchbase, Inc.
*
* 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.couchbase.client.core.util;
import com.couchbase.client.core.Core;
import com.couchbase.client.core.annotation.Stability;
import com.couchbase.client.core.config.BucketConfig;
import com.couchbase.client.core.error.UnambiguousTimeoutException;
import com.couchbase.client.core.retry.reactor.Backoff;
import com.couchbase.client.core.retry.reactor.Retry;
import com.couchbase.client.core.retry.reactor.RetryExhaustedException;
import reactor.core.publisher.Mono;
import java.time.Duration;
/**
* Defines helpful routines for working with bucket configs.
*/
@Stability.Internal
public class BucketConfigUtil {
private BucketConfigUtil() {}
private static final Duration retryDelay = Duration.ofMillis(100);
/**
* A bucket config can be null while the bucket has not been opened. This method allows easily for a config to be
* available.
*/
public static Mono waitForBucketConfig(final Core core,
final String bucketName,
final Duration timeout) {
return Mono.fromCallable(() -> {
final BucketConfig bucketConfig = core.clusterConfig().bucketConfig(bucketName);
if (bucketConfig == null) {
throw new NullPointerException();
}
return bucketConfig;
}).retryWhen(Retry.anyOf(NullPointerException.class)
.timeout(timeout)
.backoff(Backoff.fixed(retryDelay))
.toReactorRetry())
.onErrorResume(err -> {
if (err instanceof RetryExhaustedException) {
return Mono.error(new UnambiguousTimeoutException("Timed out while waiting for bucket config", null));
} else {
return Mono.error(err);
}
});
}
}