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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.protocol;
import org.apache.dubbo.common.URL;
import org.apache.dubbo.common.config.ConfigurationUtils;
import org.apache.dubbo.common.logger.ErrorTypeAwareLogger;
import org.apache.dubbo.common.logger.LoggerFactory;
import org.apache.dubbo.common.serialize.support.SerializableClassRegistry;
import org.apache.dubbo.common.serialize.support.SerializationOptimizer;
import org.apache.dubbo.common.utils.ConcurrentHashSet;
import org.apache.dubbo.common.utils.StringUtils;
import org.apache.dubbo.remoting.Constants;
import org.apache.dubbo.rpc.Exporter;
import org.apache.dubbo.rpc.Invoker;
import org.apache.dubbo.rpc.Protocol;
import org.apache.dubbo.rpc.ProtocolServer;
import org.apache.dubbo.rpc.RpcException;
import org.apache.dubbo.rpc.model.FrameworkModel;
import org.apache.dubbo.rpc.model.ScopeModelAware;
import org.apache.dubbo.rpc.support.ProtocolUtils;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import static org.apache.dubbo.common.constants.CommonConstants.DEFAULT_SERVER_SHUTDOWN_TIMEOUT;
import static org.apache.dubbo.common.constants.CommonConstants.SHUTDOWN_WAIT_KEY;
import static org.apache.dubbo.common.constants.CommonConstants.OPTIMIZER_KEY;
import static org.apache.dubbo.common.constants.LoggerCodeConstants.PROTOCOL_FAILED_DESTROY_INVOKER;
/**
* abstract ProtocolSupport.
*/
public abstract class AbstractProtocol implements Protocol, ScopeModelAware {
protected final ErrorTypeAwareLogger logger = LoggerFactory.getErrorTypeAwareLogger(getClass());
protected final Map> exporterMap = new ConcurrentHashMap<>();
/**
*
*/
protected final Map serverMap = new ConcurrentHashMap<>();
// TODO SoftReference
protected final Set> invokers = new ConcurrentHashSet<>();
protected FrameworkModel frameworkModel;
private final Set optimizers = new ConcurrentHashSet<>();
@Override
public void setFrameworkModel(FrameworkModel frameworkModel) {
this.frameworkModel = frameworkModel;
}
protected static String serviceKey(URL url) {
int port = url.getParameter(Constants.BIND_PORT_KEY, url.getPort());
return serviceKey(port, url.getPath(), url.getVersion(), url.getGroup());
}
protected static String serviceKey(int port, String serviceName, String serviceVersion, String serviceGroup) {
return ProtocolUtils.serviceKey(port, serviceName, serviceVersion, serviceGroup);
}
@Override
public List getServers() {
return Collections.unmodifiableList(new ArrayList<>(serverMap.values()));
}
protected void loadServerProperties(ProtocolServer server) {
// read and hold config before destroy
int serverShutdownTimeout = ConfigurationUtils.getServerShutdownTimeout(server.getUrl().getScopeModel());
server.getAttributes().put(SHUTDOWN_WAIT_KEY, serverShutdownTimeout);
}
protected int getServerShutdownTimeout(ProtocolServer server) {
return (int) server.getAttributes().getOrDefault(SHUTDOWN_WAIT_KEY, DEFAULT_SERVER_SHUTDOWN_TIMEOUT);
}
@Override
public void destroy() {
for (Invoker invoker : invokers) {
if (invoker != null) {
try {
if (logger.isInfoEnabled()) {
logger.info("Destroy reference: " + invoker.getUrl());
}
invoker.destroy();
} catch (Throwable t) {
logger.warn(PROTOCOL_FAILED_DESTROY_INVOKER, "", "", t.getMessage(), t);
}
}
}
invokers.clear();
exporterMap.forEach((key, exporter) -> {
if (exporter != null) {
try {
if (logger.isInfoEnabled()) {
logger.info("Unexport service: " + exporter.getInvoker().getUrl());
}
exporter.unexport();
} catch (Throwable t) {
logger.warn(PROTOCOL_FAILED_DESTROY_INVOKER, "", "", t.getMessage(), t);
}
}
});
exporterMap.clear();
}
@Override
public Invoker refer(Class type, URL url) throws RpcException {
return protocolBindingRefer(type, url);
}
@Deprecated
protected abstract Invoker protocolBindingRefer(Class type, URL url) throws RpcException;
public Map> getExporterMap() {
return exporterMap;
}
public Collection> getExporters() {
return Collections.unmodifiableCollection(exporterMap.values());
}
protected void optimizeSerialization(URL url) throws RpcException {
String className = url.getParameter(OPTIMIZER_KEY, "");
if (StringUtils.isEmpty(className) || optimizers.contains(className)) {
return;
}
logger.info("Optimizing the serialization process for Kryo, FST, etc...");
try {
Class clazz = Thread.currentThread().getContextClassLoader().loadClass(className);
if (!SerializationOptimizer.class.isAssignableFrom(clazz)) {
throw new RpcException("The serialization optimizer " + className + " isn't an instance of " + SerializationOptimizer.class.getName());
}
SerializationOptimizer optimizer = (SerializationOptimizer) clazz.newInstance();
if (optimizer.getSerializableClasses() == null) {
return;
}
for (Class c : optimizer.getSerializableClasses()) {
SerializableClassRegistry.registerClass(c);
}
optimizers.add(className);
} catch (ClassNotFoundException e) {
throw new RpcException("Cannot find the serialization optimizer class: " + className, e);
} catch (InstantiationException | IllegalAccessException e) {
throw new RpcException("Cannot instantiate the serialization optimizer class: " + className, e);
}
}
}