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/**
* Copyright 2017-2020 ZTE Corporation.
* <p>
* Licensed 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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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.onap.holmes.rulemgt.tools;
import lombok.extern.slf4j.Slf4j;
import org.jvnet.hk2.annotations.Service;
import org.onap.holmes.common.api.entity.CorrelationRule;
import org.onap.holmes.common.engine.entity.EngineEntity;
import org.onap.holmes.common.engine.service.EngineEntityService;
import org.onap.holmes.rulemgt.wrapper.RuleQueryWrapper;
import javax.inject.Inject;
import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.stream.Collectors;
@Service
@Slf4j
public class EngineTools {
@Inject
private RuleQueryWrapper ruleQueryWrapper;
@Inject
private EngineEntityService engineEntityService;
public List<String> getInstanceList() {
List<EngineEntity> entities = engineEntityService.getAllEntities();
return entities.stream().map(EngineEntity::getIp).collect(Collectors.toList());
}
public List<String> getLegacyEngineInstances() {
return engineEntityService.getLegacyEngines();
}
public String getEngineWithLeastRules() {
LinkedHashMap<String, Integer> ruleNumInEachEngine = new LinkedHashMap<>();
try {
for (String ip : getInstanceList()) {
List<CorrelationRule> rules = ruleQueryWrapper.queryRuleByEngineInstance(ip);
if (rules != null) {
ruleNumInEachEngine.put(ip, rules.size());
}
}
} catch (Exception e) {
log.error("getEngineWithLeastRules failed!" + e.getMessage());
}
Integer[] numOfRules = ruleNumInEachEngine.values().toArray(new Integer[0]);
Arrays.sort(numOfRules);
for (String ip : ruleNumInEachEngine.keySet()) {
if (ruleNumInEachEngine.get(ip) == numOfRules[0]) {
return ip;
}
}
return null;
}
}
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