com.alibaba.nacos.config.server.service.ConfigCacheService Maven / Gradle / Ivy
/*
* Copyright 1999-2018 Alibaba Group Holding Ltd.
*
* 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 com.alibaba.nacos.config.server.service;
import com.alibaba.nacos.common.notify.NotifyCenter;
import com.alibaba.nacos.common.utils.CollectionUtils;
import com.alibaba.nacos.common.utils.InternetAddressUtil;
import com.alibaba.nacos.common.utils.MD5Utils;
import com.alibaba.nacos.common.utils.StringUtils;
import com.alibaba.nacos.config.server.constant.Constants;
import com.alibaba.nacos.config.server.model.CacheItem;
import com.alibaba.nacos.config.server.model.ConfigCache;
import com.alibaba.nacos.config.server.model.event.LocalDataChangeEvent;
import com.alibaba.nacos.config.server.service.dump.disk.ConfigDiskServiceFactory;
import com.alibaba.nacos.config.server.utils.GroupKey2;
import com.alibaba.nacos.config.server.utils.LogUtil;
import com.alibaba.nacos.sys.env.EnvUtil;
import com.google.common.collect.Lists;
import java.io.IOException;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import static com.alibaba.nacos.config.server.constant.Constants.ENCODE_UTF8;
import static com.alibaba.nacos.config.server.constant.Constants.PERSIST_ENCODE;
import static com.alibaba.nacos.config.server.utils.LogUtil.DEFAULT_LOG;
import static com.alibaba.nacos.config.server.utils.LogUtil.DUMP_LOG;
import static com.alibaba.nacos.config.server.utils.LogUtil.FATAL_LOG;
/**
* Config service.
*
* @author Nacos
*/
public class ConfigCacheService {
private static final String NO_SPACE_CN = "设备上没有空间";
private static final String NO_SPACE_EN = "No space left on device";
private static final String DISK_QUOTA_CN = "超出磁盘限额";
private static final String DISK_QUOTA_EN = "Disk quota exceeded";
/**
* groupKey -> cacheItem.
*/
private static final ConcurrentHashMap CACHE = new ConcurrentHashMap<>();
public static int groupCount() {
return CACHE.size();
}
/**
* Save config file and update md5 value in cache.
*
* @param dataId dataId string value.
* @param group group string value.
* @param tenant tenant string value.
* @param content content string value.
* @param md5 md5 of persist.
* @param lastModifiedTs lastModifiedTs.
* @param type file type.
* @return dumpChange success or not.
*/
public static boolean dumpWithMd5(String dataId, String group, String tenant, String content, String md5,
long lastModifiedTs, String type, String encryptedDataKey) {
String groupKey = GroupKey2.getKey(dataId, group, tenant);
CacheItem ci = makeSure(groupKey, encryptedDataKey);
ci.setType(type);
final int lockResult = tryWriteLock(groupKey);
if (lockResult < 0) {
DUMP_LOG.warn("[dump-error] write lock failed. {}", groupKey);
return false;
}
try {
//check timestamp
boolean lastModifiedOutDated = lastModifiedTs < ConfigCacheService.getLastModifiedTs(groupKey);
if (lastModifiedOutDated) {
DUMP_LOG.warn("[dump-ignore] timestamp is outdated,groupKey={}", groupKey);
return true;
}
boolean newLastModified = lastModifiedTs > ConfigCacheService.getLastModifiedTs(groupKey);
if (md5 == null) {
md5 = MD5Utils.md5Hex(content, PERSIST_ENCODE);
}
//check md5 & update local disk cache.
String localContentMd5 = ConfigCacheService.getContentMd5(groupKey);
boolean md5Changed = !md5.equals(localContentMd5);
if (md5Changed) {
DUMP_LOG.info("[dump] md5 changed, save to disk cache ,groupKey={}, newMd5={},oldMd5={}", groupKey, md5,
localContentMd5);
ConfigDiskServiceFactory.getInstance().saveToDisk(dataId, group, tenant, content);
} else {
DUMP_LOG.warn("[dump-ignore] ignore to save to disk cache. md5 consistent,groupKey={}, md5={}",
groupKey, md5);
}
//check md5 and timestamp & update local jvm cache.
if (md5Changed) {
DUMP_LOG.info(
"[dump] md5 changed, update md5 and timestamp in jvm cache ,groupKey={}, newMd5={},oldMd5={},lastModifiedTs={}",
groupKey, md5, localContentMd5, lastModifiedTs);
updateMd5(groupKey, md5, lastModifiedTs, encryptedDataKey);
} else if (newLastModified) {
DUMP_LOG.info(
"[dump] md5 consistent ,timestamp changed, update timestamp only in jvm cache ,groupKey={},lastModifiedTs={}",
groupKey, lastModifiedTs);
updateTimeStamp(groupKey, lastModifiedTs, encryptedDataKey);
} else {
DUMP_LOG.warn(
"[dump-ignore] ignore to save to jvm cache. md5 consistent and no new timestamp changed.groupKey={}",
groupKey);
}
return true;
} catch (IOException ioe) {
DUMP_LOG.error("[dump-exception] save disk error. " + groupKey + ", " + ioe);
if (ioe.getMessage() != null) {
String errMsg = ioe.getMessage();
if (errMsg.contains(NO_SPACE_CN) || errMsg.contains(NO_SPACE_EN) || errMsg.contains(DISK_QUOTA_CN)
|| errMsg.contains(DISK_QUOTA_EN)) {
// Protect from disk full.
FATAL_LOG.error("Local Disk Full,Exit", ioe);
EnvUtil.systemExit();
}
}
return false;
} finally {
releaseWriteLock(groupKey);
}
}
/**
* Save config file and update md5 value in cache.
*
* @param dataId dataId string value.
* @param group group string value.
* @param tenant tenant string value.
* @param content content string value.
* @param lastModifiedTs lastModifiedTs.
* @param type file type.
* @param encryptedDataKey encryptedDataKey.
* @return dumpChange success or not.
*/
public static boolean dump(String dataId, String group, String tenant, String content, long lastModifiedTs,
String type, String encryptedDataKey) {
return dumpWithMd5(dataId, group, tenant, content, null, lastModifiedTs, type, encryptedDataKey);
}
/**
* Save config file and update md5 value in cache.
*
* @param dataId dataId string value.
* @param group group string value.
* @param tenant tenant string value.
* @param content content string value.
* @param lastModifiedTs lastModifiedTs.
* @param betaIps betaIps string value.
* @return dumpChange success or not.
*/
public static boolean dumpBeta(String dataId, String group, String tenant, String content, long lastModifiedTs,
String betaIps, String encryptedDataKey) {
final String groupKey = GroupKey2.getKey(dataId, group, tenant);
makeSure(groupKey, null);
final int lockResult = tryWriteLock(groupKey);
if (lockResult < 0) {
DUMP_LOG.warn("[dump-beta-error] write lock failed. {}", groupKey);
return false;
}
try {
//check timestamp
boolean timestampOutDated = lastModifiedTs < ConfigCacheService.getBetaLastModifiedTs(groupKey);
if (timestampOutDated) {
DUMP_LOG.warn("[dump-beta-ignore] timestamp is outdated,groupKey={}", groupKey);
return true;
}
boolean timestampUpdated = lastModifiedTs > ConfigCacheService.getBetaLastModifiedTs(groupKey);
String[] betaIpsArr = betaIps.split(",");
List betaIpList = Lists.newArrayList(betaIpsArr);
String md5 = MD5Utils.md5Hex(content, ENCODE_UTF8);
//md5 check & update local disk cache.
String localContentBetaMd5 = ConfigCacheService.getContentBetaMd5(groupKey);
boolean md5Changed = !md5.equals(localContentBetaMd5);
if (md5Changed) {
DUMP_LOG.info(
"[dump-beta] md5 changed, update md5 in local disk cache. groupKey={}, newMd5={}, oldMd5={}",
groupKey, md5, localContentBetaMd5);
ConfigDiskServiceFactory.getInstance().saveBetaToDisk(dataId, group, tenant, content);
}
//md5 , ip list timestamp check and update local jvm cache.
boolean ipListChanged = !betaIpList.equals(ConfigCacheService.getBetaIps(groupKey));
if (md5Changed) {
DUMP_LOG.info(
"[dump-beta] md5 changed, update md5 & ip list & timestamp in jvm cache. groupKey={}, newMd5={}, oldMd5={}，lastModifiedTs={}",
groupKey, md5, localContentBetaMd5, lastModifiedTs);
updateBetaMd5(groupKey, md5, betaIpList, lastModifiedTs, encryptedDataKey);
} else if (ipListChanged) {
DUMP_LOG.warn("[dump-beta] ip list changed, update ip list & timestamp in jvm cache. groupKey={},"
+ " newIpList={}, oldIpList={}，lastModifiedTs={}", groupKey, betaIpList,
ConfigCacheService.getBetaIps(groupKey), lastModifiedTs);
updateBetaIpList(groupKey, betaIpList, lastModifiedTs);
} else if (timestampUpdated) {
DUMP_LOG.warn(
"[dump-beta] timestamp changed, update timestamp in jvm cache. groupKey={}, newLastModifiedTs={}, oldLastModifiedTs={}",
groupKey, lastModifiedTs, ConfigCacheService.getBetaLastModifiedTs(groupKey));
updateBetaTimeStamp(groupKey, lastModifiedTs);
} else {
DUMP_LOG.warn(
"[dump-beta-ignore] ignore to save jvm cache, md5 & ip list & timestamp no changed. groupKey={}",
groupKey);
}
return true;
} catch (IOException ioe) {
DUMP_LOG.error("[dump-beta-exception] save disk error. " + groupKey + ", " + ioe.toString(), ioe);
return false;
} finally {
releaseWriteLock(groupKey);
}
}
/**
* Save config file and update md5 value in cache.
*
* @param dataId dataId string value.
* @param group group string value.
* @param tenant tenant string value.
* @param content content string value.
* @param lastModifiedTs lastModifiedTs.
* @param tag tag string value.
* @return dumpChange success or not.
*/
public static boolean dumpTag(String dataId, String group, String tenant, String tag, String content,
long lastModifiedTs, String encryptedDataKey4Tag) {
final String groupKey = GroupKey2.getKey(dataId, group, tenant);
makeSure(groupKey, null);
final int lockResult = tryWriteLock(groupKey);
if (lockResult < 0) {
DUMP_LOG.warn("[dump-tag-error] write lock failed. {}", groupKey);
return false;
}
try {
//check timestamp
long localTagLastModifiedTs = ConfigCacheService.getTagLastModifiedTs(groupKey, tag);
boolean timestampOutdated = lastModifiedTs < localTagLastModifiedTs;
if (timestampOutdated) {
DUMP_LOG.warn("[dump-tag-ignore] timestamp is outdated,groupKey={}", groupKey);
return true;
}
boolean timestampChanged = lastModifiedTs > localTagLastModifiedTs;
final String md5 = MD5Utils.md5Hex(content, ENCODE_UTF8);
String localContentTagMd5 = ConfigCacheService.getContentTagMd5(groupKey, tag);
boolean md5Changed = !md5.equals(localContentTagMd5);
if (md5Changed) {
ConfigDiskServiceFactory.getInstance().saveTagToDisk(dataId, group, tenant, tag, content);
}
if (md5Changed) {
DUMP_LOG.warn(
"[dump-tag] md5 changed, update local jvm cache, groupKey={},tag={}, newMd5={},oldMd5={},lastModifiedTs={}",
groupKey, tag, md5, localContentTagMd5, lastModifiedTs);
updateTagMd5(groupKey, tag, md5, lastModifiedTs, encryptedDataKey4Tag);
} else if (timestampChanged) {
DUMP_LOG.warn(
"[dump-tag] timestamp changed, update last modified in local jvm cache, groupKey={},tag={},"
+ "tagLastModifiedTs={},oldTagLastModifiedTs={}", groupKey, tag, lastModifiedTs,
localTagLastModifiedTs);
updateTagTimeStamp(groupKey, tag, lastModifiedTs);
} else {
DUMP_LOG.warn("[dump-tag-ignore] md5 & timestamp not changed. groupKey={},tag={}", groupKey, tag);
}
return true;
} catch (IOException ioe) {
DUMP_LOG.error("[dump-tag-exception] save disk error. " + groupKey + ", " + ioe.toString(), ioe);
return false;
} finally {
releaseWriteLock(groupKey);
}
}
/**
* Delete config file, and delete cache.
*
* @param dataId dataId string value.
* @param group group string value.
* @param tenant tenant string value.
* @return remove success or not.
*/
public static boolean remove(String dataId, String group, String tenant) {
final String groupKey = GroupKey2.getKey(dataId, group, tenant);
final int lockResult = tryWriteLock(groupKey);
// If data is non-existent.
if (0 == lockResult) {
DUMP_LOG.info("[remove-ok] {} not exist.", groupKey);
return true;
}
// try to lock failed
if (lockResult < 0) {
DUMP_LOG.warn("[remove-error] write lock failed. {}", groupKey);
return false;
}
try {
DUMP_LOG.info("[dump] remove local disk cache,groupKey={} ", groupKey);
ConfigDiskServiceFactory.getInstance().removeConfigInfo(dataId, group, tenant);
CACHE.remove(groupKey);
DUMP_LOG.info("[dump] remove local jvm cache,groupKey={} ", groupKey);
NotifyCenter.publishEvent(new LocalDataChangeEvent(groupKey));
return true;
} finally {
releaseWriteLock(groupKey);
}
}
/**
* Delete beta config file, and delete cache.
*
* @param dataId dataId string value.
* @param group group string value.
* @param tenant tenant string value.
* @return remove success or not.
*/
public static boolean removeBeta(String dataId, String group, String tenant) {
final String groupKey = GroupKey2.getKey(dataId, group, tenant);
final int lockResult = tryWriteLock(groupKey);
// If data is non-existent.
if (0 == lockResult) {
DUMP_LOG.info("[remove-ok] {} not exist.", groupKey);
return true;
}
// try to lock failed
if (lockResult < 0) {
DUMP_LOG.warn("[remove-error] write lock failed. {}", groupKey);
return false;
}
try {
DUMP_LOG.info("[remove-beta-ok] remove beta in local disk cache,groupKey={} ", groupKey);
ConfigDiskServiceFactory.getInstance().removeConfigInfo4Beta(dataId, group, tenant);
NotifyCenter.publishEvent(new LocalDataChangeEvent(groupKey, true, CACHE.get(groupKey).getIps4Beta()));
CACHE.get(groupKey).removeBeta();
DUMP_LOG.info("[remove-beta-ok] remove beta in local jvm cache,groupKey={} ", groupKey);
return true;
} finally {
releaseWriteLock(groupKey);
}
}
/**
* Delete tag config file, and delete cache.
*
* @param dataId dataId string value.
* @param group group string value.
* @param tenant tenant string value.
* @param tag tag string value.
* @return remove success or not.
*/
public static boolean removeTag(String dataId, String group, String tenant, String tag) {
final String groupKey = GroupKey2.getKey(dataId, group, tenant);
final int lockResult = tryWriteLock(groupKey);
// If data is non-existent.
if (0 == lockResult) {
DUMP_LOG.info("[remove-ok] {} not exist.", groupKey);
return true;
}
// try to lock failed
if (lockResult < 0) {
DUMP_LOG.warn("[remove-error] write lock failed. {}", groupKey);
return false;
}
try {
DUMP_LOG.info("[remove-tag-ok] remove tag in local disk cache,tag={},groupKey={} ", tag, groupKey);
ConfigDiskServiceFactory.getInstance().removeConfigInfo4Tag(dataId, group, tenant, tag);
CacheItem ci = CACHE.get(groupKey);
if (ci.getConfigCacheTags() != null) {
ci.getConfigCacheTags().remove(tag);
if (ci.getConfigCacheTags().isEmpty()) {
ci.clearConfigTags();
}
}
DUMP_LOG.info("[remove-tag-ok] remove tag in local jvm cache,tag={},groupKey={} ", tag, groupKey);
NotifyCenter.publishEvent(new LocalDataChangeEvent(groupKey, tag));
return true;
} finally {
releaseWriteLock(groupKey);
}
}
/**
* Update md5 value.
*
* @param groupKey groupKey string value.
* @param md5Utf8 md5 string value.
* @param lastModifiedTs lastModifiedTs long value.
*/
public static void updateMd5(String groupKey, String md5Utf8, long lastModifiedTs, String encryptedDataKey) {
CacheItem cache = makeSure(groupKey, encryptedDataKey);
if (cache.getConfigCache().getMd5Utf8() == null || !cache.getConfigCache().getMd5Utf8().equals(md5Utf8)) {
cache.getConfigCache().setMd5Utf8(md5Utf8);
cache.getConfigCache().setLastModifiedTs(lastModifiedTs);
cache.getConfigCache().setEncryptedDataKey(encryptedDataKey);
NotifyCenter.publishEvent(new LocalDataChangeEvent(groupKey));
}
}
/**
* Update Beta md5 value.
*
* @param groupKey groupKey string value.
* @param md5Utf8 md5UTF8 string value.
* @param ips4Beta ips4Beta List.
* @param lastModifiedTs lastModifiedTs long value.
*/
public static void updateBetaMd5(String groupKey, String md5Utf8, List ips4Beta, long lastModifiedTs,
String encryptedDataKey4Beta) {
CacheItem cache = makeSure(groupKey, null);
cache.initBetaCacheIfEmpty();
String betaMd5Utf8 = cache.getConfigCacheBeta().getMd5(ENCODE_UTF8);
if (betaMd5Utf8 == null || !betaMd5Utf8.equals(md5Utf8) || !CollectionUtils.isListEqual(ips4Beta,
cache.ips4Beta)) {
cache.isBeta = true;
cache.ips4Beta = ips4Beta;
cache.getConfigCacheBeta().setMd5Utf8(md5Utf8);
cache.getConfigCacheBeta().setLastModifiedTs(lastModifiedTs);
cache.getConfigCacheBeta().setEncryptedDataKey(encryptedDataKey4Beta);
NotifyCenter.publishEvent(new LocalDataChangeEvent(groupKey, true, ips4Beta));
}
}
/**
* Update tag md5 value.
*
* @param groupKey groupKey string value.
* @param tag tag string value.
* @param md5Utf8 md5UTF8 string value.
* @param lastModifiedTs lastModifiedTs long value.
*/
public static void updateTagMd5(String groupKey, String tag, String md5Utf8, long lastModifiedTs,
String encryptedDataKey4Tag) {
CacheItem cache = makeSure(groupKey, null);
cache.initConfigTagsIfEmpty(tag);
ConfigCache configCache = cache.getConfigCacheTags().get(tag);
configCache.setMd5Utf8(md5Utf8);
configCache.setLastModifiedTs(lastModifiedTs);
configCache.setEncryptedDataKey(encryptedDataKey4Tag);
NotifyCenter.publishEvent(new LocalDataChangeEvent(groupKey, tag));
}
/**
* Get and return content md5 value from cache. Empty string represents no data.
*/
public static String getContentMd5(String groupKey) {
return getContentMd5(groupKey, "", "");
}
public static String getContentMd5(String groupKey, String ip, String tag) {
CacheItem item = CACHE.get(groupKey);
if (item != null && item.isBeta && item.ips4Beta != null && item.ips4Beta.contains(ip)
&& item.getConfigCacheBeta() != null) {
return item.getConfigCacheBeta().getMd5(ENCODE_UTF8);
}
if (item != null && StringUtils.isNotBlank(tag) && item.getConfigCacheTags() != null
&& item.getConfigCacheTags().containsKey(tag)) {
return item.getConfigCacheTags().get(tag).getMd5(ENCODE_UTF8);
}
if (item != null && item.isBatch && item.delimiter >= InternetAddressUtil.ipToInt(ip)
&& item.getConfigCacheBatch() != null) {
return item.getConfigCacheBatch().getMd5(ENCODE_UTF8);
}
return (null != item) ? item.getConfigCache().getMd5(ENCODE_UTF8) : Constants.NULL;
}
/**
* Get and return beta md5 value from cache. Empty string represents no data.
*/
public static String getContentBetaMd5(String groupKey) {
CacheItem item = CACHE.get(groupKey);
if (item == null || item.getConfigCacheBeta() == null) {
return Constants.NULL;
}
return item.getConfigCacheBeta().getMd5(ENCODE_UTF8);
}
/**
* Get and return tag md5 value from cache. Empty string represents no data.
*
* @param groupKey groupKey string value.
* @param tag tag string value.
* @return Content Tag Md5 value.
*/
public static String getContentTagMd5(String groupKey, String tag) {
CacheItem item = CACHE.get(groupKey);
if (item == null || item.getConfigCacheTags() == null || !item.getConfigCacheTags().containsKey(tag)) {
return Constants.NULL;
}
return item.getConfigCacheTags().get(tag).getMd5(ENCODE_UTF8);
}
/**
* Get and return beta ip list.
*
* @param groupKey groupKey string value.
* @return list beta ips.
*/
public static List getBetaIps(String groupKey) {
CacheItem item = CACHE.get(groupKey);
return (null != item) ? item.getIps4Beta() : Collections.emptyList();
}
public static long getBetaLastModifiedTs(String groupKey) {
CacheItem item = CACHE.get(groupKey);
return (null != item && item.getConfigCacheBeta() != null) ? item.getConfigCacheBeta().getLastModifiedTs() : 0L;
}
public static long getTagLastModifiedTs(String groupKey, String tag) {
CacheItem item = CACHE.get(groupKey);
if (item.getConfigCacheTags() == null || !item.getConfigCacheTags().containsKey(tag)) {
return 0;
}
ConfigCache configCacheTag = item.getConfigCacheTags().get(tag);
return (null != configCacheTag) ? configCacheTag.getLastModifiedTs() : 0;
}
/**
* Get and return content cache.
*
* @param groupKey groupKey string value.
* @return CacheItem.
*/
public static CacheItem getContentCache(String groupKey) {
return CACHE.get(groupKey);
}
public static long getLastModifiedTs(String groupKey) {
CacheItem item = CACHE.get(groupKey);
return (null != item) ? item.getConfigCache().getLastModifiedTs() : 0L;
}
/**
* update tag timestamp.
*
* @param groupKey groupKey.
* @param tag tag.
* @param lastModifiedTs lastModifiedTs.
*/
public static void updateTagTimeStamp(String groupKey, String tag, long lastModifiedTs) {
CacheItem cache = makeSure(groupKey, null);
cache.initConfigTagsIfEmpty(tag);
cache.getConfigCacheTags().get(tag).setLastModifiedTs(lastModifiedTs);
}
public static boolean isUptodate(String groupKey, String md5) {
String serverMd5 = ConfigCacheService.getContentMd5(groupKey);
return StringUtils.equals(md5, serverMd5);
}
public static boolean isUptodate(String groupKey, String md5, String ip, String tag) {
String serverMd5 = ConfigCacheService.getContentMd5(groupKey, ip, tag);
return StringUtils.equals(md5, serverMd5);
}
/**
* Try to add read lock. If it succeeded, then it can call {@link #releaseWriteLock(String)}.And it won't call if
* failed.
*
* @param groupKey groupKey string value.
* @return 0 - No data and failed. Positive number - lock succeeded. Negative number - lock failed。
*/
public static int tryReadLock(String groupKey) {
CacheItem groupItem = CACHE.get(groupKey);
int result = (null == groupItem) ? 0 : (groupItem.getRwLock().tryReadLock() ? 1 : -1);
if (result < 0) {
DEFAULT_LOG.warn("[read-lock] failed, {}, {}", result, groupKey);
}
return result;
}
/**
* Release readLock.
*
* @param groupKey groupKey string value.
*/
public static void releaseReadLock(String groupKey) {
CacheItem item = CACHE.get(groupKey);
if (null != item) {
item.getRwLock().releaseReadLock();
}
}
/**
* Try to add write lock. If it succeeded, then it can call {@link #releaseWriteLock(String)}.And it won't call if
* failed.
*
* @param groupKey groupKey string value.
* @return 0 - No data and failed. Positive number 0 - Success. Negative number - lock failed。
*/
static int tryWriteLock(String groupKey) {
CacheItem groupItem = CACHE.get(groupKey);
int result = (null == groupItem) ? 0 : (groupItem.getRwLock().tryWriteLock() ? 1 : -1);
if (result < 0) {
DEFAULT_LOG.warn("[write-lock] failed, {}, {}", result, groupKey);
}
return result;
}
static void releaseWriteLock(String groupKey) {
CacheItem groupItem = CACHE.get(groupKey);
if (null != groupItem) {
groupItem.getRwLock().releaseWriteLock();
}
}
static CacheItem makeSure(final String groupKey, final String encryptedDataKey) {
CacheItem item = CACHE.get(groupKey);
if (null != item) {
return item;
}
CacheItem tmp = new CacheItem(groupKey, encryptedDataKey);
item = CACHE.putIfAbsent(groupKey, tmp);
return (null == item) ? tmp : item;
}
/**
* update time stamp.
*
* @param groupKey groupKey.
* @param lastModifiedTs lastModifiedTs.
* @param encryptedDataKey encryptedDataKey.
*/
public static void updateTimeStamp(String groupKey, long lastModifiedTs, String encryptedDataKey) {
CacheItem cache = makeSure(groupKey, encryptedDataKey);
cache.getConfigCache().setLastModifiedTs(lastModifiedTs);
}
/**
* update beta ip list.
*
* @param groupKey groupKey.
* @param ips4Beta ips4Beta.
* @param lastModifiedTs lastModifiedTs.
*/
private static void updateBetaIpList(String groupKey, List ips4Beta, long lastModifiedTs) {
CacheItem cache = makeSure(groupKey, null);
cache.initBetaCacheIfEmpty();
cache.setBeta(true);
cache.setIps4Beta(ips4Beta);
cache.getConfigCacheBeta().setLastModifiedTs(lastModifiedTs);
NotifyCenter.publishEvent(new LocalDataChangeEvent(groupKey, true, ips4Beta));
}
/**
* update beta lastModifiedTs.
*
* @param groupKey groupKey.
* @param lastModifiedTs lastModifiedTs.
*/
private static void updateBetaTimeStamp(String groupKey, long lastModifiedTs) {
CacheItem cache = makeSure(groupKey, null);
cache.initBetaCacheIfEmpty();
cache.getConfigCacheBeta().setLastModifiedTs(lastModifiedTs);
}
private static final int TRY_GET_LOCK_TIMES = 9;
/**
* try config read lock with spin of try get lock times.
*
* @param groupKey group key of config.
* @return
*/
public static int tryConfigReadLock(String groupKey) {
// Lock failed by default.
int lockResult = -1;
// Try to get lock times, max value: 10;
for (int i = TRY_GET_LOCK_TIMES; i >= 0; --i) {
lockResult = ConfigCacheService.tryReadLock(groupKey);
// The data is non-existent.
if (0 == lockResult) {
break;
}
// Success
if (lockResult > 0) {
break;
}
// Retry.
if (i > 0) {
try {
Thread.sleep(1);
} catch (Exception e) {
LogUtil.PULL_CHECK_LOG.error("An Exception occurred while thread sleep", e);
}
}
}
return lockResult;
}
}
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