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Java client driver for SequoiaDB

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/*
 * Copyright 2018 SequoiaDB 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.sequoiadb.datasource;

class ConcreteSerialStrategy extends AbstractStrategy {

    private int _counter = 0;

    @Override
    public String getAddress() {
        String addr = null;
        _addrLock.lock();
        try {
            if (1 <= _addrs.size()) {
                addr = _addrs.get((0x7fff & (_counter++)) % (_addrs.size()));
            }
        } finally {
            _addrLock.unlock();
        }
        return addr;
    }
}