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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.registry.client.migration;
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.utils.CollectionUtils;
import org.apache.dubbo.common.utils.StringUtils;
import org.apache.dubbo.registry.client.migration.model.MigrationRule;
import org.apache.dubbo.rpc.Invoker;
import org.apache.dubbo.rpc.cluster.ClusterInvoker;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import static org.apache.dubbo.common.constants.LoggerCodeConstants.PROTOCOL_INCORRECT_PARAMETER_VALUES;
public class DefaultMigrationAddressComparator implements MigrationAddressComparator {
private static final ErrorTypeAwareLogger logger = LoggerFactory.getErrorTypeAwareLogger(DefaultMigrationAddressComparator.class);
private static final String MIGRATION_THRESHOLD = "dubbo.application.migration.threshold";
private static final String DEFAULT_THRESHOLD_STRING = "0.0";
private static final float DEFAULT_THREAD = 0f;
public static final String OLD_ADDRESS_SIZE = "OLD_ADDRESS_SIZE";
public static final String NEW_ADDRESS_SIZE = "NEW_ADDRESS_SIZE";
private Map> serviceMigrationData = new ConcurrentHashMap<>();
@Override
public boolean shouldMigrate(ClusterInvoker newInvoker, ClusterInvoker oldInvoker, MigrationRule rule) {
Map migrationData = serviceMigrationData.computeIfAbsent(oldInvoker.getUrl().getDisplayServiceKey(), _k -> new ConcurrentHashMap<>());
if (!newInvoker.hasProxyInvokers()) {
migrationData.put(OLD_ADDRESS_SIZE, getAddressSize(oldInvoker));
migrationData.put(NEW_ADDRESS_SIZE, -1);
logger.info("No " + getInvokerType(newInvoker) + " address available, stop compare.");
return false;
}
if (!oldInvoker.hasProxyInvokers()) {
migrationData.put(OLD_ADDRESS_SIZE, -1);
migrationData.put(NEW_ADDRESS_SIZE, getAddressSize(newInvoker));
logger.info("No " + getInvokerType(oldInvoker) + " address available, stop compare.");
return true;
}
int newAddressSize = getAddressSize(newInvoker);
int oldAddressSize = getAddressSize(oldInvoker);
migrationData.put(OLD_ADDRESS_SIZE, oldAddressSize);
migrationData.put(NEW_ADDRESS_SIZE, newAddressSize);
String rawThreshold = null;
Float configuredThreshold = rule == null ? null : rule.getThreshold(oldInvoker.getUrl());
if (configuredThreshold != null && configuredThreshold >= 0) {
rawThreshold = String.valueOf(configuredThreshold);
}
rawThreshold = StringUtils.isNotEmpty(rawThreshold) ? rawThreshold : ConfigurationUtils.getCachedDynamicProperty(newInvoker.getUrl().getScopeModel(), MIGRATION_THRESHOLD, DEFAULT_THRESHOLD_STRING);
float threshold;
try {
threshold = Float.parseFloat(rawThreshold);
} catch (Exception e) {
logger.error(PROTOCOL_INCORRECT_PARAMETER_VALUES, "", "", "Invalid migration threshold " + rawThreshold);
threshold = DEFAULT_THREAD;
}
logger.info("serviceKey:" + oldInvoker.getUrl().getServiceKey() + " Instance address size " + newAddressSize + ", interface address size " + oldAddressSize + ", threshold " + threshold);
if (newAddressSize != 0 && oldAddressSize == 0) {
return true;
}
if (newAddressSize == 0 && oldAddressSize == 0) {
return false;
}
if (((float) newAddressSize / (float) oldAddressSize) >= threshold) {
return true;
}
return false;
}
private int getAddressSize(ClusterInvoker invoker) {
if (invoker == null) {
return -1;
}
List> invokers = invoker.getDirectory().getAllInvokers();
return CollectionUtils.isNotEmpty(invokers) ? invokers.size() : 0;
}
@Override
public Map getAddressSize(String displayServiceKey) {
return serviceMigrationData.get(displayServiceKey);
}
private String getInvokerType(ClusterInvoker invoker) {
if (invoker.isServiceDiscovery()) {
return "instance";
}
return "interface";
}
}