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/**
* Copyright 2017 ZTE Corporation.
*
* 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
*
* 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.onap.holmes.rulemgt.send;
import lombok.extern.slf4j.Slf4j;
import org.jvnet.hk2.annotations.Service;
import org.onap.holmes.common.api.entity.CorrelationRule;
import org.onap.holmes.common.exception.CorrelationException;
import org.onap.holmes.common.utils.DbDaoUtil;
import org.onap.holmes.rulemgt.bolt.enginebolt.EngineWrapper;
import org.onap.holmes.rulemgt.db.CorrelationRuleDao;
import org.onap.holmes.rulemgt.msb.EngineIpList;
import org.onap.holmes.rulemgt.wrapper.RuleQueryWrapper;
import org.onap.holmes.rulemgt.wrapper.RuleMgtWrapper;
import javax.annotation.PostConstruct;
import javax.inject.Inject;
import java.util.*;
@Service
@Slf4j
public class RuleAllocation {
private final static int ENABLE = 1;
@Inject
private RuleMgtWrapper ruleMgtWrapper;
@Inject
private RuleQueryWrapper ruleQueryWrapper;
@Inject
private EngineWrapper engineWrapper;
@Inject
private EngineIpList engineIpList;
@Inject
private DbDaoUtil daoUtil;
private CorrelationRuleDao correlationRuleDao;
private int ruleCount;
private int serviceCount;
private List<String> temIpList = new ArrayList<>();
private List<String> engineService = new ArrayList<>();
private List<CorrelationRule> allRules = new ArrayList<>();
@PostConstruct
public void initDaoUtilAndEngineIp() throws Exception{
correlationRuleDao = daoUtil.getJdbiDaoByOnDemand(CorrelationRuleDao.class);
temIpList = engineIpList.getServiceCount();
}
public void judgeAndAllocateRule(List<String> ipList)throws Exception{
if(ipList != null) {
engineService = ipList;
serviceCount = ipList.size();
}
if(temIpList.size() < serviceCount){
//extend
List<CorrelationRule> deleteRule = calculateRule(temIpList);
List<CorrelationRule> allocateRule = calculateRule(temIpList);
List<String> extendIp = extendCompareIp(engineService,temIpList);
AllocateService(extendIp,allocateRule);
deleteRuleFromFormerEngine(deleteRule,temIpList);
} else if (temIpList.size() > serviceCount) {
//destroy
List<String> destroyIp = destroyCompareIp(engineService, temIpList);
AllocateService(restIp(destroyIp), relocateRuleAfterDestroy(destroyIp));
} else if(temIpList.size() == serviceCount) {
temIpList = engineService;
return;
}
temIpList = engineService;
}
// When the engine is expanding, the rules that need to be allocated are calculated.
private List<CorrelationRule> calculateRule(List<String> oldIpList) throws Exception{
allRules = ruleQueryWrapper.queryRuleByEnable(ENABLE);
if(allRules != null) {
ruleCount = allRules.size();
}
int count = ruleCount / serviceCount;
int remainder = ruleCount % serviceCount;
List<CorrelationRule> subRule = new ArrayList<>();
for(String ip : oldIpList) {
List<CorrelationRule> rules = ruleQueryWrapper.queryRuleByEngineInstance(ip);
List<CorrelationRule> tem = rules.subList(count + (remainder-- / oldIpList.size()),rules.size());
subRule.addAll(tem);
}
return subRule;
}
//Rules that need to be allocated after the engine is destroyed
private List<CorrelationRule> relocateRuleAfterDestroy(List<String> destroyIpList) throws CorrelationException {
List<CorrelationRule> rules = new ArrayList<>();
try{
if(destroyIpList != null){
for(String ip : destroyIpList) {
rules.addAll(ruleQueryWrapper.queryRuleByEngineInstance(ip));
}
}
}catch(CorrelationException e) {
log.error("method relocateRuleAfterDestroy get data from DB failed !" +e.getMessage());
}
return rules;
}
//Extended IP
private List<String> extendCompareIp(List<String> newList, List<String> oldList){
List<String> extendIpList = new ArrayList<>();
for( String ip :newList) {
if(! oldList.contains(ip)) {
extendIpList.add(ip);
}
}
return extendIpList;
}
//Destroyed IP
private List<String> destroyCompareIp(List<String> newList, List<String> oldList) {
List<String> destroyIpList = new ArrayList<>();
for(String ip : oldList) {
if(!newList.contains(ip)) {
destroyIpList.add(ip);
}
}
return destroyIpList;
}
//Residual IP after destruction
private List<String> restIp(List<String> destroyIp) {
List<String> restIpList = new ArrayList<>();
for(String ip : engineService) {
if(!destroyIp.contains(ip)) {
restIpList.add(ip);
}
}
return restIpList;
}
public void AllocateService(List<String> extendIpList, List<CorrelationRule> subList) throws Exception{
List<String> needIpList = getSortIp(extendIpList);
for(int i=0,j=0;j < subList.size();i++,j++ ){
int index = i % needIpList.size();
String deployIp = needIpList.get(index);
CorrelationRule rule = subList.get(j);
rule.setEngineInstance(deployIp);
allocateDeployRule(rule,deployIp);
}
}
//The IP to be allocated is in ascending order, and the least is circulate.
private List<String > getSortIp(List<String> ipList){
List<CorrelationRule> ipRuleList = new ArrayList<>();
HashMap<String,String> hashMap = new HashMap();
try{
for(String ip : ipList){
ipRuleList = ruleQueryWrapper.queryRuleByEngineInstance(ip);
if(ipRuleList != null) {
hashMap.put(ip, String.valueOf(ipRuleList.size()));
}
}
}catch (Exception e){
log.error("getEngineIp4AddRule failed !" + e.getMessage());
}
List<Map.Entry<String, String>> list_Data = new ArrayList<Map.Entry<String, String>>(hashMap.entrySet());
Collections.sort(list_Data, new Comparator<Map.Entry<String, String>>() {
public int compare(Map.Entry<String, String> o1, Map.Entry<String, String> o2)
{
return o1.getValue().compareTo(o2.getValue());
}
});
List<String> needList = new ArrayList<>();
for(Map.Entry<String, String> map: list_Data) {
String key = map.getKey();
needList.add(key);
}
return needList;
}
private void allocateDeployRule(CorrelationRule rule, String ip) throws CorrelationException {
try{
ruleMgtWrapper.deployRule2Engine(rule,ip);
correlationRuleDao.updateRule(rule);
}catch (CorrelationException e){
throw new CorrelationException("allocate Deploy Rule failed", e);
}
}
private void deleteRuleFromFormerEngine(List<CorrelationRule> subRule, List<String> oldList) {
try{
for(String ip : oldList){
for(CorrelationRule rule: subRule) {
if(ip.equals(rule.getEngineInstance())) {
engineWrapper.deleteRuleFromEngine(rule.getPackageName(),ip);
}
}
}
}catch (CorrelationException e) {
log.error("When the engine is extended, deleting rule failed" +e.getMessage());
}
}
}
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