org.apache.flink.runtime.zookeeper.ZooKeeperSharedCount Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* 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 "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 org.apache.flink.runtime.zookeeper;
import org.apache.flink.util.Preconditions;
import org.apache.flink.shaded.curator4.org.apache.curator.framework.recipes.shared.SharedCount;
import java.io.IOException;
/**
* Wrapper class for a {@link SharedCount} so that we don't expose a curator dependency in our
* internal APIs. Such an exposure is problematic due to the relocation of curator.
*/
public class ZooKeeperSharedCount {
private final SharedCount sharedCount;
public ZooKeeperSharedCount(SharedCount sharedCount) {
this.sharedCount = Preconditions.checkNotNull(sharedCount);
}
public void start() throws Exception {
sharedCount.start();
}
public void close() throws IOException {
sharedCount.close();
}
public ZooKeeperVersionedValue getVersionedValue() {
return new ZooKeeperVersionedValue<>(sharedCount.getVersionedValue());
}
public boolean trySetCount(ZooKeeperVersionedValue previous, int newCount)
throws Exception {
return sharedCount.trySetCount(previous.getVersionedValue(), newCount);
}
}