com.alibaba.nacos.client.config.impl.CacheData Maven / Gradle / Ivy
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/*
* 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.client.config.impl;
import com.alibaba.nacos.api.common.Constants;
import com.alibaba.nacos.api.config.listener.AbstractSharedListener;
import com.alibaba.nacos.api.config.listener.Listener;
import com.alibaba.nacos.api.exception.NacosException;
import com.alibaba.nacos.client.config.filter.impl.ConfigFilterChainManager;
import com.alibaba.nacos.client.config.filter.impl.ConfigResponse;
import com.alibaba.nacos.client.config.utils.MD5;
import com.alibaba.nacos.client.utils.LogUtils;
import com.alibaba.nacos.client.utils.TenantUtil;
import org.slf4j.Logger;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
/**
* Listner Management
*
* @author Nacos
*/
public class CacheData {
private static final Logger LOGGER = LogUtils.logger(CacheData.class);
public boolean isInitializing() {
return isInitializing;
}
public void setInitializing(boolean isInitializing) {
this.isInitializing = isInitializing;
}
public String getMd5() {
return md5;
}
public String getTenant() {
return tenant;
}
public String getContent() {
return content;
}
public void setContent(String newContent) {
this.content = newContent;
this.md5 = getMd5String(content);
}
/**
* Add listener
* if CacheData already set new content, Listener should init lastCallMd5 by CacheData.md5
*
* @param listener listener
*/
public void addListener(Listener listener) {
if (null == listener) {
throw new IllegalArgumentException("listener is null");
}
ManagerListenerWrap wrap = new ManagerListenerWrap(listener, md5);
if (listeners.addIfAbsent(wrap)) {
LOGGER.info("[{}] [add-listener] ok, tenant={}, dataId={}, group={}, cnt={}", name, tenant, dataId, group,
listeners.size());
}
}
public void removeListener(Listener listener) {
if (null == listener) {
throw new IllegalArgumentException("listener is null");
}
ManagerListenerWrap wrap = new ManagerListenerWrap(listener);
if (listeners.remove(wrap)) {
LOGGER.info("[{}] [remove-listener] ok, dataId={}, group={}, cnt={}", name, dataId, group, listeners.size());
}
}
/**
* 返回监听器列表上的迭代器，只读。保证不返回NULL。
*/
public List getListeners() {
List result = new ArrayList();
for (ManagerListenerWrap wrap : listeners) {
result.add(wrap.listener);
}
return result;
}
public long getLocalConfigInfoVersion() {
return localConfigLastModified;
}
public void setLocalConfigInfoVersion(long localConfigLastModified) {
this.localConfigLastModified = localConfigLastModified;
}
public boolean isUseLocalConfigInfo() {
return isUseLocalConfig;
}
public void setUseLocalConfigInfo(boolean useLocalConfigInfo) {
this.isUseLocalConfig = useLocalConfigInfo;
if (!useLocalConfigInfo) {
localConfigLastModified = -1;
}
}
public int getTaskId() {
return taskId;
}
public void setTaskId(int taskId) {
this.taskId = taskId;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((dataId == null) ? 0 : dataId.hashCode());
result = prime * result + ((group == null) ? 0 : group.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (null == obj || obj.getClass() != getClass()) {
return false;
}
if (this == obj) {
return true;
}
CacheData other = (CacheData) obj;
return dataId.equals(other.dataId) && group.equals(other.group);
}
@Override
public String toString() {
return "CacheData [" + dataId + ", " + group + "]";
}
void checkListenerMd5() {
for (ManagerListenerWrap wrap : listeners) {
if (!md5.equals(wrap.lastCallMd5)) {
safeNotifyListener(dataId, group, content, md5, wrap);
}
}
}
private void safeNotifyListener(final String dataId, final String group, final String content,
final String md5, final ManagerListenerWrap listenerWrap) {
final Listener listener = listenerWrap.listener;
Runnable job = new Runnable() {
@Override
public void run() {
ClassLoader myClassLoader = Thread.currentThread().getContextClassLoader();
ClassLoader appClassLoader = listener.getClass().getClassLoader();
try {
if (listener instanceof AbstractSharedListener) {
AbstractSharedListener adapter = (AbstractSharedListener) listener;
adapter.fillContext(dataId, group);
LOGGER.info("[{}] [notify-context] dataId={}, group={}, md5={}", name, dataId, group, md5);
}
// 执行回调之前先将线程classloader设置为具体webapp的classloader，以免回调方法中调用spi接口是出现异常或错用（多应用部署才会有该问题）。
Thread.currentThread().setContextClassLoader(appClassLoader);
ConfigResponse cr = new ConfigResponse();
cr.setDataId(dataId);
cr.setGroup(group);
cr.setContent(content);
configFilterChainManager.doFilter(null, cr);
String contentTmp = cr.getContent();
listener.receiveConfigInfo(contentTmp);
listenerWrap.lastCallMd5 = md5;
LOGGER.info("[{}] [notify-ok] dataId={}, group={}, md5={}, listener={} ", name, dataId, group, md5,
listener);
} catch (NacosException de) {
LOGGER.error("[{}] [notify-error] dataId={}, group={}, md5={}, listener={} errCode={} errMsg={}", name,
dataId, group, md5, listener, de.getErrCode(), de.getErrMsg());
} catch (Throwable t) {
LOGGER.error("[{}] [notify-error] dataId={}, group={}, md5={}, listener={} tx={}", name, dataId, group,
md5, listener, t.getCause());
} finally {
Thread.currentThread().setContextClassLoader(myClassLoader);
}
}
};
final long startNotify = System.currentTimeMillis();
try {
if (null != listener.getExecutor()) {
listener.getExecutor().execute(job);
} else {
job.run();
}
} catch (Throwable t) {
LOGGER.error("[{}] [notify-error] dataId={}, group={}, md5={}, listener={} throwable={}", name, dataId, group,
md5, listener, t.getCause());
}
final long finishNotify = System.currentTimeMillis();
LOGGER.info("[{}] [notify-listener] time cost={}ms in ClientWorker, dataId={}, group={}, md5={}, listener={} ",
name, (finishNotify - startNotify), dataId, group, md5, listener);
}
static public String getMd5String(String config) {
return (null == config) ? Constants.NULL : MD5.getInstance().getMD5String(config);
}
private String loadCacheContentFromDiskLocal(String name, String dataId, String group, String tenant) {
String content = LocalConfigInfoProcessor.getFailover(name, dataId, group, tenant);
content = (null != content) ? content
: LocalConfigInfoProcessor.getSnapshot(name, dataId, group, tenant);
return content;
}
public CacheData(ConfigFilterChainManager configFilterChainManager, String name, String dataId, String group) {
if (null == dataId || null == group) {
throw new IllegalArgumentException("dataId=" + dataId + ", group=" + group);
}
this.name = name;
this.configFilterChainManager = configFilterChainManager;
this.dataId = dataId;
this.group = group;
this.tenant = TenantUtil.getUserTenantForAcm();
listeners = new CopyOnWriteArrayList();
this.isInitializing = true;
this.content = loadCacheContentFromDiskLocal(name, dataId, group, tenant);
this.md5 = getMd5String(content);
}
public CacheData(ConfigFilterChainManager configFilterChainManager, String name, String dataId, String group,
String tenant) {
if (null == dataId || null == group) {
throw new IllegalArgumentException("dataId=" + dataId + ", group=" + group);
}
this.name = name;
this.configFilterChainManager = configFilterChainManager;
this.dataId = dataId;
this.group = group;
this.tenant = tenant;
listeners = new CopyOnWriteArrayList();
this.isInitializing = true;
this.content = loadCacheContentFromDiskLocal(name, dataId, group, tenant);
this.md5 = getMd5String(content);
}
// ==================
private final String name;
private final ConfigFilterChainManager configFilterChainManager;
public final String dataId;
public final String group;
public final String tenant;
private final CopyOnWriteArrayList listeners;
private volatile String md5;
/**
* whether use local config
*/
private volatile boolean isUseLocalConfig = false;
/**
* last modify time
*/
private volatile long localConfigLastModified;
private volatile String content;
private int taskId;
private volatile boolean isInitializing = true;
}
class ManagerListenerWrap {
final Listener listener;
String lastCallMd5 = CacheData.getMd5String(null);
ManagerListenerWrap(Listener listener) {
this.listener = listener;
}
ManagerListenerWrap(Listener listener, String md5) {
this.listener = listener;
this.lastCallMd5 = md5;
}
@Override
public boolean equals(Object obj) {
if (null == obj || obj.getClass() != getClass()) {
return false;
}
if (obj == this) {
return true;
}
ManagerListenerWrap other = (ManagerListenerWrap) obj;
return listener.equals(other.listener);
}
@Override
public int hashCode() {
return super.hashCode();
}
}