/*
* Copyright 2009-2016 Weibo, 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.weibo.api.motan.rpc;
import java.util.concurrent.atomic.AtomicInteger;
import com.weibo.api.motan.exception.MotanFrameworkException;
import com.weibo.api.motan.util.MotanFrameworkUtil;
/**
* abstract referer
*
* @author maijunsheng
*
* @param <T>
*/
public abstract class AbstractReferer<T> extends AbstractNode implements Referer<T> {
protected Class<T> clz;
protected AtomicInteger activeRefererCount = new AtomicInteger(0);
protected URL serviceUrl;
public AbstractReferer(Class<T> clz, URL url) {
super(url);
this.clz = clz;
this.serviceUrl = url;
}
public AbstractReferer(Class<T> clz, URL url, URL serviceUrl) {
super(url);
this.clz = clz;
this.serviceUrl = serviceUrl;
}
@Override
public Class<T> getInterface() {
return clz;
}
@Override
public Response call(Request request) {
if (!isAvailable()) {
throw new MotanFrameworkException(this.getClass().getSimpleName() + " call Error: node is not available, url=" + url.getUri()
+ " " + MotanFrameworkUtil.toString(request));
}
incrActiveCount(request);
Response response = null;
try {
response = doCall(request);
return response;
} finally {
decrActiveCount(request, response);
}
}
@Override
public int activeRefererCount() {
return activeRefererCount.get();
}
protected void incrActiveCount(Request request) {
activeRefererCount.incrementAndGet();
}
protected void decrActiveCount(Request request, Response response) {
activeRefererCount.decrementAndGet();
}
protected abstract Response doCall(Request request);
@Override
public String desc() {
return "[" + this.getClass().getSimpleName() + "] url=" + url;
}
@Override
public URL getServiceUrl() {
return serviceUrl;
}
}