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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;
import org.apache.dubbo.common.logger.Logger;
import org.apache.dubbo.common.logger.LoggerFactory;
import org.apache.dubbo.common.utils.ClassUtils;
import org.apache.dubbo.common.utils.ReflectUtils;
import org.apache.dubbo.common.utils.StringUtils;
import org.apache.dubbo.rpc.Constants;
import org.apache.dubbo.rpc.Invoker;
import org.apache.dubbo.rpc.ProxyFactory;
import org.apache.dubbo.rpc.RpcException;
import org.apache.dubbo.rpc.model.ServiceModel;
import org.apache.dubbo.rpc.service.Destroyable;
import org.apache.dubbo.rpc.service.EchoService;
import org.apache.dubbo.rpc.service.GenericService;
import java.util.Arrays;
import java.util.LinkedHashSet;
import static org.apache.dubbo.common.constants.CommonConstants.COMMA_SPLIT_PATTERN;
import static org.apache.dubbo.rpc.Constants.INTERFACES;
/**
* AbstractProxyFactory
*/
public abstract class AbstractProxyFactory implements ProxyFactory {
private static final Class[] INTERNAL_INTERFACES = new Class[]{
EchoService.class, Destroyable.class
};
private static final Logger logger = LoggerFactory.getLogger(AbstractProxyFactory.class);
@Override
public T getProxy(Invoker invoker) throws RpcException {
return getProxy(invoker, false);
}
@Override
public T getProxy(Invoker invoker, boolean generic) throws RpcException {
// when compiling with native image, ensure that the order of the interfaces remains unchanged
LinkedHashSet> interfaces = new LinkedHashSet<>();
ClassLoader classLoader = getClassLoader(invoker);
String config = invoker.getUrl().getParameter(INTERFACES);
if (StringUtils.isNotEmpty(config)) {
String[] types = COMMA_SPLIT_PATTERN.split(config);
for (String type : types) {
try {
interfaces.add(ReflectUtils.forName(classLoader, type));
} catch (Throwable e) {
// ignore
}
}
}
Class realInterfaceClass = null;
if (generic) {
try {
// find the real interface from url
String realInterface = invoker.getUrl().getParameter(Constants.INTERFACE);
realInterfaceClass = ReflectUtils.forName(classLoader, realInterface);
interfaces.add(realInterfaceClass);
} catch (Throwable e) {
// ignore
}
if (GenericService.class.equals(invoker.getInterface()) || !GenericService.class.isAssignableFrom(invoker.getInterface())) {
interfaces.add(com.alibaba.dubbo.rpc.service.GenericService.class);
}
}
interfaces.add(invoker.getInterface());
interfaces.addAll(Arrays.asList(INTERNAL_INTERFACES));
try {
return getProxy(invoker, interfaces.toArray(new Class[0]));
} catch (Throwable t) {
if (generic) {
if (realInterfaceClass != null) {
interfaces.remove(realInterfaceClass);
}
interfaces.remove(invoker.getInterface());
logger.error("Error occur when creating proxy. Invoker is in generic mode. Trying to create proxy without real interface class.", t);
return getProxy(invoker, interfaces.toArray(new Class[0]));
} else {
throw t;
}
}
}
private ClassLoader getClassLoader(Invoker invoker) {
ServiceModel serviceModel = invoker.getUrl().getServiceModel();
ClassLoader classLoader = null;
if (serviceModel != null && serviceModel.getInterfaceClassLoader() != null) {
classLoader = serviceModel.getInterfaceClassLoader();
}
if (classLoader == null) {
classLoader = ClassUtils.getClassLoader();
}
return classLoader;
}
public static Class[] getInternalInterfaces() {
return INTERNAL_INTERFACES.clone();
}
public abstract T getProxy(Invoker invoker, Class[] types);
}