/*
* 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.transport;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;
import com.weibo.api.motan.exception.MotanBizException;
import com.weibo.api.motan.exception.MotanFrameworkException;
import com.weibo.api.motan.exception.MotanServiceException;
import com.weibo.api.motan.protocol.rpc.CompressRpcCodec;
import com.weibo.api.motan.rpc.DefaultResponse;
import com.weibo.api.motan.rpc.Provider;
import com.weibo.api.motan.rpc.Request;
import com.weibo.api.motan.rpc.Response;
import com.weibo.api.motan.util.LoggerUtil;
import com.weibo.api.motan.util.MotanFrameworkUtil;
import com.weibo.api.motan.util.ReflectUtil;
/**
* service 消息处理
*
* <pre>
* 1) 多个service的支持
* 2) 区分service的方式: group/interface/version
* </pre>
*
* @author maijunsheng
* @version 创建时间:2013-6-4
*
*/
public class ProviderMessageRouter implements MessageHandler {
private Map<String, Provider<?>> providers = new HashMap<String, Provider<?>>();
// 所有暴露出去的方法计数
// 比如:messageRouter 里面涉及2个Service: ServiceA 有5个public method,ServiceB
// 有10个public method,那么就是15
protected AtomicInteger methodCounter = new AtomicInteger(0);
public ProviderMessageRouter() {}
public ProviderMessageRouter(Provider<?> provider) {
addProvider(provider);
}
@Override
public Object handle(Channel channel, Object message) {
if (channel == null || message == null) {
throw new MotanFrameworkException("RequestRouter handler(channel, message) params is null");
}
if (!(message instanceof Request)) {
throw new MotanFrameworkException("RequestRouter message type not support: " + message.getClass());
}
Request request = (Request) message;
String serviceKey = MotanFrameworkUtil.getServiceKey(request);
Provider<?> provider = providers.get(serviceKey);
if (provider == null) {
LoggerUtil.error(this.getClass().getSimpleName() + " handler Error: provider not exist serviceKey=" + serviceKey + " "
+ MotanFrameworkUtil.toString(request));
MotanServiceException exception =
new MotanServiceException(this.getClass().getSimpleName() + " handler Error: provider not exist serviceKey="
+ serviceKey + " " + MotanFrameworkUtil.toString(request));
DefaultResponse response = new DefaultResponse();
response.setException(exception);
return response;
}
return call(request, provider);
}
protected Response call(Request request, Provider<?> provider) {
try {
return provider.call(request);
} catch (Exception e) {
DefaultResponse response = new DefaultResponse();
response.setException(new MotanBizException("provider call process error", e));
return response;
}
}
public synchronized void addProvider(Provider<?> provider) {
String serviceKey = MotanFrameworkUtil.getServiceKey(provider.getUrl());
if (providers.containsKey(serviceKey)) {
throw new MotanFrameworkException("provider alread exist: " + serviceKey);
}
providers.put(serviceKey, provider);
// 获取该service暴露的方法数:
List<Method> methods = ReflectUtil.getPublicMethod(provider.getInterface());
CompressRpcCodec.putMethodSign(provider, methods);// 对所有接口方法生成方法签名。适配方法签名压缩调用方式。
int publicMethodCount = methods.size();
methodCounter.addAndGet(publicMethodCount);
LoggerUtil.info("RequestRouter addProvider: url=" + provider.getUrl() + " all_public_method_count=" + methodCounter.get());
}
public synchronized void removeProvider(Provider<?> provider) {
String serviceKey = MotanFrameworkUtil.getServiceKey(provider.getUrl());
providers.remove(serviceKey);
List<Method> methods = ReflectUtil.getPublicMethod(provider.getInterface());
int publicMethodCount = methods.size();
methodCounter.getAndSet(methodCounter.get() - publicMethodCount);
LoggerUtil.info("RequestRouter removeProvider: url=" + provider.getUrl() + " all_public_method_count=" + methodCounter.get());
}
public int getPublicMethodCount() {
return methodCounter.get();
}
}