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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.dubbo.rpc.proxy.wrapper;
import org.apache.dubbo.common.URL;
import org.apache.dubbo.common.URLBuilder;
import org.apache.dubbo.common.Version;
import org.apache.dubbo.common.bytecode.Wrapper;
import org.apache.dubbo.common.logger.ErrorTypeAwareLogger;
import org.apache.dubbo.common.logger.LoggerFactory;
import org.apache.dubbo.common.utils.ConfigUtils;
import org.apache.dubbo.common.utils.NetUtils;
import org.apache.dubbo.common.utils.ReflectUtils;
import org.apache.dubbo.common.utils.StringUtils;
import org.apache.dubbo.rpc.Exporter;
import org.apache.dubbo.rpc.Invoker;
import org.apache.dubbo.rpc.Protocol;
import org.apache.dubbo.rpc.ProxyFactory;
import org.apache.dubbo.rpc.RpcException;
import org.apache.dubbo.rpc.service.GenericService;
import java.lang.reflect.Constructor;
import static org.apache.dubbo.common.constants.CommonConstants.STUB_EVENT_KEY;
import static org.apache.dubbo.common.constants.LoggerCodeConstants.PROXY_FAILED_EXPORT_SERVICE;
import static org.apache.dubbo.rpc.Constants.DEFAULT_STUB_EVENT;
import static org.apache.dubbo.rpc.Constants.IS_SERVER_KEY;
import static org.apache.dubbo.rpc.Constants.LOCAL_KEY;
import static org.apache.dubbo.rpc.Constants.STUB_EVENT_METHODS_KEY;
import static org.apache.dubbo.rpc.Constants.STUB_KEY;
/**
* StubProxyFactoryWrapper
*/
public class StubProxyFactoryWrapper implements ProxyFactory {
private static final ErrorTypeAwareLogger LOGGER = LoggerFactory.getErrorTypeAwareLogger(StubProxyFactoryWrapper.class);
private final ProxyFactory proxyFactory;
private Protocol protocol;
public StubProxyFactoryWrapper(ProxyFactory proxyFactory) {
this.proxyFactory = proxyFactory;
}
public void setProtocol(Protocol protocol) {
this.protocol = protocol;
}
@Override
public T getProxy(Invoker invoker, boolean generic) throws RpcException {
T proxy = proxyFactory.getProxy(invoker, generic);
if (GenericService.class != invoker.getInterface()) {
URL url = invoker.getUrl();
String stub = url.getParameter(STUB_KEY, url.getParameter(LOCAL_KEY));
if (ConfigUtils.isNotEmpty(stub)) {
Class serviceType = invoker.getInterface();
if (ConfigUtils.isDefault(stub)) {
if (url.hasParameter(STUB_KEY)) {
stub = serviceType.getName() + "Stub";
} else {
stub = serviceType.getName() + "Local";
}
}
try {
Class stubClass = ReflectUtils.forName(stub);
if (!serviceType.isAssignableFrom(stubClass)) {
throw new IllegalStateException("The stub implementation class " + stubClass.getName() + " not implement interface " + serviceType.getName());
}
try {
Constructor constructor = ReflectUtils.findConstructor(stubClass, serviceType);
proxy = (T) constructor.newInstance(new Object[]{proxy});
//export stub service
URLBuilder urlBuilder = URLBuilder.from(url);
if (url.getParameter(STUB_EVENT_KEY, DEFAULT_STUB_EVENT)) {
urlBuilder.addParameter(STUB_EVENT_METHODS_KEY, StringUtils.join(Wrapper.getWrapper(proxy.getClass()).getDeclaredMethodNames(), ","));
urlBuilder.addParameter(IS_SERVER_KEY, Boolean.FALSE.toString());
try {
export(proxy, invoker.getInterface(), urlBuilder.build());
} catch (Exception e) {
LOGGER.error(PROXY_FAILED_EXPORT_SERVICE, "", "", "export a stub service error.", e);
}
}
} catch (NoSuchMethodException e) {
throw new IllegalStateException("No such constructor \"public " + stubClass.getSimpleName() + "(" + serviceType.getName() + ")\" in stub implementation class " + stubClass.getName(), e);
}
} catch (Throwable t) {
LOGGER.error(PROXY_FAILED_EXPORT_SERVICE, "", "", "Failed to create stub implementation class " + stub + " in consumer " + NetUtils.getLocalHost() + " use dubbo version " + Version.getVersion() + ", cause: " + t.getMessage(), t);
// ignore
}
}
}
return proxy;
}
@Override
@SuppressWarnings({"unchecked", "rawtypes"})
public T getProxy(Invoker invoker) throws RpcException {
return getProxy(invoker, false);
}
@Override
public Invoker getInvoker(T proxy, Class type, URL url) throws RpcException {
return proxyFactory.getInvoker(proxy, type, url);
}
private Exporter export(T instance, Class type, URL url) {
return protocol.export(proxyFactory.getInvoker(instance, type, url));
}
}