/*
* Copyright (c) 2010-2012 Grid Dynamics Consulting Services, Inc, All Rights Reserved
* http://www.griddynamics.com
*
* This library is free software; you can redistribute it and/or modify it under the terms of
* the Apache License; either
* version 2.0 of the License, or any later version.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.griddynamics.jagger.invoker;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* @ingroup Main_Distributors_group */
public abstract class PairSupplierFactoryLoadBalancer<Q, E> extends QueryPoolLoadBalancer<Q, E> {
private final static Logger log = LoggerFactory.getLogger(PairSupplierFactoryLoadBalancer.class);
private final PairSupplierFactory<Q, E> pairSupplierFactory;
private volatile PairSupplier<Q, E> pairSupplier;
protected PairSupplierFactoryLoadBalancer(PairSupplierFactory<Q, E> pairSupplierFactory) {
this.pairSupplierFactory = pairSupplierFactory;
}
protected PairSupplier<Q, E> getPairSupplier() {
return pairSupplier;
}
@Override
public void init() {
synchronized (lock) {
if (initialized) {
log.debug("already initialized. returning...");
return;
}
super.init();
pairSupplier = pairSupplierFactory.create(queryProvider, endpointProvider);
log.info("{} pairs in total to balance", pairSupplier.size());
}
}
}