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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.cluster.directory;
import org.apache.dubbo.common.URL;
import org.apache.dubbo.common.logger.ErrorTypeAwareLogger;
import org.apache.dubbo.common.logger.LoggerFactory;
import org.apache.dubbo.common.utils.CollectionUtils;
import org.apache.dubbo.rpc.Invocation;
import org.apache.dubbo.rpc.Invoker;
import org.apache.dubbo.rpc.RpcException;
import org.apache.dubbo.rpc.cluster.RouterChain;
import org.apache.dubbo.rpc.cluster.router.state.BitList;
import java.util.List;
import static org.apache.dubbo.common.constants.LoggerCodeConstants.CLUSTER_FAILED_SITE_SELECTION;
/**
* StaticDirectory
*/
public class StaticDirectory extends AbstractDirectory {
private static final ErrorTypeAwareLogger logger = LoggerFactory.getErrorTypeAwareLogger(StaticDirectory.class);
public StaticDirectory(List> invokers) {
this(null, invokers, null);
}
public StaticDirectory(List> invokers, RouterChain routerChain) {
this(null, invokers, routerChain);
}
public StaticDirectory(URL url, List> invokers) {
this(url, invokers, null);
}
public StaticDirectory(URL url, List> invokers, RouterChain routerChain) {
super(url == null && CollectionUtils.isNotEmpty(invokers) ? invokers.get(0).getUrl() : url, routerChain, false);
if (CollectionUtils.isEmpty(invokers)) {
throw new IllegalArgumentException("invokers == null");
}
this.setInvokers(new BitList<>(invokers));
}
@Override
public Class getInterface() {
return getInvokers().get(0).getInterface();
}
@Override
public List> getAllInvokers() {
return getInvokers();
}
@Override
public boolean isAvailable() {
if (isDestroyed()) {
return false;
}
for (Invoker invoker : getValidInvokers()) {
if (invoker.isAvailable()) {
return true;
}
}
return false;
}
@Override
public void destroy() {
if (isDestroyed()) {
return;
}
for (Invoker invoker : getInvokers()) {
invoker.destroy();
}
super.destroy();
}
public void buildRouterChain() {
RouterChain routerChain = RouterChain.buildChain(getInterface(), getUrl());
routerChain.setInvokers(getInvokers(), ()->{});
this.setRouterChain(routerChain);
}
public void notify(List> invokers) {
BitList> bitList = new BitList<>(invokers);
if (routerChain != null) {
routerChain.setInvokers(bitList.clone(), () -> this.setInvokers(bitList));
} else {
this.setInvokers(bitList);
}
}
@Override
protected List> doList(BitList> invokers, Invocation invocation) throws RpcException {
if (routerChain != null) {
try {
List> finalInvokers = routerChain.route(getConsumerUrl(), invokers, invocation);
return finalInvokers == null ? BitList.emptyList() : finalInvokers;
} catch (Throwable t) {
logger.error(CLUSTER_FAILED_SITE_SELECTION,"Failed to execute router","","Failed to execute router: " + getUrl() + ", cause: " + t.getMessage(),t);
return BitList.emptyList();
}
}
return invokers;
}
}