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/*
* Copyright 2015 Open Networking Laboratory
*
* 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 org.onosproject.store.consistent.impl;
import org.onosproject.store.service.AsyncAtomicCounter;
import org.onosproject.store.service.AtomicCounter;
import org.onosproject.store.service.StorageException;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
/**
* Default implementation for a distributed AtomicCounter backed by
* partitioned Raft DB.
* <p>
* The initial value will be zero.
*/
public class DefaultAtomicCounter implements AtomicCounter {
private static final int OPERATION_TIMEOUT_MILLIS = 5000;
private final AsyncAtomicCounter asyncCounter;
public DefaultAtomicCounter(String name,
Database database,
boolean meteringEnabled) {
asyncCounter = new DefaultAsyncAtomicCounter(name, database, meteringEnabled);
}
@Override
public long incrementAndGet() {
return complete(asyncCounter.incrementAndGet());
}
@Override
public long getAndIncrement() {
return complete(asyncCounter.getAndIncrement());
}
@Override
public long getAndAdd(long delta) {
return complete(asyncCounter.getAndAdd(delta));
}
@Override
public long addAndGet(long delta) {
return complete(asyncCounter.getAndAdd(delta));
}
@Override
public void set(long value) {
complete(asyncCounter.set(value));
}
@Override
public boolean compareAndSet(long expectedValue, long updateValue) {
return complete(asyncCounter.compareAndSet(expectedValue, updateValue));
}
@Override
public long get() {
return complete(asyncCounter.get());
}
private static <T> T complete(CompletableFuture<T> future) {
try {
return future.get(OPERATION_TIMEOUT_MILLIS, TimeUnit.MILLISECONDS);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
throw new StorageException.Interrupted();
} catch (TimeoutException e) {
throw new StorageException.Timeout();
} catch (ExecutionException e) {
throw new StorageException(e.getCause());
}
}
}
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