com.hazelcast.client.proxy.ClientIdGeneratorProxy Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2015, Hazelcast, Inc. All Rights Reserved.
*
* 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.hazelcast.client.proxy;
import com.hazelcast.client.spi.ClientProxy;
import com.hazelcast.core.IAtomicLong;
import com.hazelcast.core.IdGenerator;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
public class ClientIdGeneratorProxy extends ClientProxy implements IdGenerator {
private static final int BLOCK_SIZE = 10000;
final String name;
final IAtomicLong atomicLong;
AtomicInteger residue;
AtomicLong local;
public ClientIdGeneratorProxy(String serviceName, String objectId, IAtomicLong atomicLong) {
super(serviceName, objectId);
this.atomicLong = atomicLong;
this.name = objectId;
residue = new AtomicInteger(BLOCK_SIZE);
local = new AtomicLong(-1);
}
public boolean init(long id) {
if (id < 0) {
return false;
}
long step = (id / BLOCK_SIZE);
synchronized (this) {
boolean init = atomicLong.compareAndSet(0, step + 1);
if (init) {
local.set(step);
residue.set((int) (id % BLOCK_SIZE) + 1);
}
return init;
}
}
public long newId() {
int value = residue.getAndIncrement();
if (value >= BLOCK_SIZE) {
synchronized (this) {
value = residue.get();
if (value >= BLOCK_SIZE) {
local.set(atomicLong.getAndIncrement());
residue.set(0);
}
return newId();
}
}
return local.get() * BLOCK_SIZE + value;
}
protected void onDestroy() {
atomicLong.destroy();
residue = null;
local = null;
}
@Override
public String toString() {
return "IdGenerator{" + "name='" + getName() + '\'' + '}';
}
}