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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.common.config.configcenter.wrapper;
import org.apache.dubbo.common.config.configcenter.ConfigurationListener;
import org.apache.dubbo.common.config.configcenter.DynamicConfiguration;
import org.apache.dubbo.common.logger.ErrorTypeAwareLogger;
import org.apache.dubbo.common.logger.LoggerFactory;
import java.util.HashSet;
import java.util.Set;
import java.util.function.Consumer;
import java.util.function.Function;
import static org.apache.dubbo.common.constants.LoggerCodeConstants.REGISTRY_UNEXPECTED_EXCEPTION;
/**
* support multiple config center, simply iterating each concrete config center.
*/
public class CompositeDynamicConfiguration implements DynamicConfiguration {
public static final String NAME = "COMPOSITE";
private static final ErrorTypeAwareLogger logger = LoggerFactory.getErrorTypeAwareLogger(CompositeDynamicConfiguration.class);
private Set configurations = new HashSet<>();
public void addConfiguration(DynamicConfiguration configuration) {
if (configuration != null) {
this.configurations.add(configuration);
}
}
public Set getInnerConfigurations() {
return configurations;
}
@Override
public void addListener(String key, String group, ConfigurationListener listener) {
iterateListenerOperation(configuration -> configuration.addListener(key, group, listener));
}
@Override
public void removeListener(String key, String group, ConfigurationListener listener) {
iterateListenerOperation(configuration -> configuration.removeListener(key, group, listener));
}
@Override
public String getConfig(String key, String group, long timeout) throws IllegalStateException {
return (String) iterateConfigOperation(configuration -> configuration.getConfig(key, group, timeout));
}
@Override
public String getProperties(String key, String group, long timeout) throws IllegalStateException {
return (String) iterateConfigOperation(configuration -> configuration.getProperties(key, group, timeout));
}
@Override
public Object getInternalProperty(String key) {
return iterateConfigOperation(configuration -> configuration.getInternalProperty(key));
}
@Override
public boolean publishConfig(String key, String group, String content) throws UnsupportedOperationException {
boolean publishedAll = true;
for (DynamicConfiguration configuration : configurations) {
if (!configuration.publishConfig(key, group, content)) {
publishedAll = false;
}
}
return publishedAll;
}
@Override
public void close() throws Exception {
for (DynamicConfiguration configuration : configurations) {
try {
configuration.close();
} catch (Exception e) {
logger.warn(REGISTRY_UNEXPECTED_EXCEPTION, "", "", "close dynamic configuration " + configuration.getClass().getName() + "failed: " + e.getMessage(), e);
}
}
configurations.clear();
}
private void iterateListenerOperation(Consumer consumer) {
for (DynamicConfiguration configuration : configurations) {
consumer.accept(configuration);
}
}
private Object iterateConfigOperation(Function func) {
Object value = null;
for (DynamicConfiguration configuration : configurations) {
value = func.apply(configuration);
if (value != null) {
break;
}
}
return value;
}
}