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Bucket4j integration with Hazelcast 3.x branch
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/*-
* ========================LICENSE_START=================================
* Bucket4j
* %%
* Copyright (C) 2015 - 2022 Vladimir Bukhtoyarov
* %%
* 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.
* =========================LICENSE_END==================================
*/
package io.github.bucket4j.grid.hazelcast;
import java.util.Objects;
import java.util.Optional;
import java.util.concurrent.TimeUnit;
import com.hazelcast.map.IMap;
import io.github.bucket4j.TimeMeter;
import io.github.bucket4j.distributed.ExpirationAfterWriteStrategy;
import io.github.bucket4j.distributed.proxy.ClientSideConfig;
import io.github.bucket4j.distributed.proxy.generic.pessimistic_locking.AbstractLockBasedProxyManager;
import io.github.bucket4j.distributed.proxy.generic.pessimistic_locking.LockBasedTransaction;
import io.github.bucket4j.distributed.remote.RemoteBucketState;
public class HazelcastLockBasedProxyManager extends AbstractLockBasedProxyManager {
private final IMap map;
public HazelcastLockBasedProxyManager(Bucket4jHazelcast.HazelcastLockBasedProxyManagerBuilder builder) {
super(builder.getClientSideConfig());
this.map = builder.map;
}
/**
* @deprecated use {@link Bucket4jHazelcast#lockBasedBuilder(IMap)}
*/
@Deprecated
public HazelcastLockBasedProxyManager(IMap map) {
this(map, ClientSideConfig.getDefault());
}
/**
* @deprecated use {@link Bucket4jHazelcast#lockBasedBuilder(IMap)}
*/
@Deprecated
public HazelcastLockBasedProxyManager(IMap map, ClientSideConfig clientSideConfig) {
super(clientSideConfig);
this.map = Objects.requireNonNull(map);
}
@Override
public void removeProxy(K key) {
map.remove(key);
}
@Override
public boolean isAsyncModeSupported() {
// Because Hazelcast IMap does not provide "lockAsync" API.
return false;
}
@Override
public boolean isExpireAfterWriteSupported() {
return true;
}
@Override
protected LockBasedTransaction allocateTransaction(K key, Optional requestTimeout) {
return new LockBasedTransaction() {
@Override
public void begin(Optional requestTimeout) {
// do nothing
}
@Override
public void rollback() {
// do nothing
}
@Override
public void commit(Optional requestTimeout) {
// do nothing
}
@Override
public byte[] lockAndGet(Optional requestTimeout) {
map.lock(key);
return map.get(key);
}
@Override
public void unlock() {
map.unlock(key);
}
@Override
public void create(byte[] data, RemoteBucketState newState, Optional requestTimeout) {
save(data, newState);
}
@Override
public void update(byte[] data, RemoteBucketState newState, Optional requestTimeout) {
save(data, newState);
}
private void save(byte[] data, RemoteBucketState newState) {
ExpirationAfterWriteStrategy expiration = getClientSideConfig().getExpirationAfterWriteStrategy().orElse(null);
if (expiration == null) {
map.put(key, data);
} else {
long currentTimeNanos = getClientSideConfig().getClientSideClock().orElse(TimeMeter.SYSTEM_MILLISECONDS).currentTimeNanos();
long ttlMillis = expiration.calculateTimeToLiveMillis(newState, currentTimeNanos);
if (ttlMillis > 0) {
map.put(key, data, ttlMillis, TimeUnit.MILLISECONDS);
} else {
map.put(key, data);
}
}
}
@Override
public void release() {
// do nothing
}
};
}
}