openfire 有 openfire.xml ， 和数据库 保存配置属性 。当你用数据库 保存属性的情况下 ， 如果你的一台 服务器 加入了集群 ，并且 修改了属性 ，比如说 5701 端口 变成 5101 端口 ， 那么 集群的其他机器 是否 也会受到影响 。 答案是 肯定的 ， 因为 不同服务器公用了 ofProperty ， 同name 的 属性 都会覆盖 。
CREATE TABLE (
name VARCHAR(100) NOT NULL,
propValue TEXT NOT NULL,
encrypted INTEGER,
PRIMARY KEY (name)
);
mysql> select * from ofProperty;
+--------------------------------------------------+----------------------------------------------------------------------+-----------+------+
| name | propValue | encrypted | iv |
+--------------------------------------------------+----------------------------------------------------------------------+-----------+------+
| admin.authorizedJIDs | admin@192.168.2.1,pc@192.168.2.1,kkkk1@192.168.2.1 | 0 | NULL |
| adminConsole.port | 9090 | 0 | NULL |
| adminConsole.securePort | 9091 | 0 | NULL |
| connectionProvider.className | org.jivesoftware.database.DefaultConnectionProvider | 0 | NULL |
| database.defaultProvider.connectionTimeout | 1.0 | 0 | NULL |
| database.defaultProvider.driver | com.mysql.jdbc.Driver | 0 | NULL |
| database.defaultProvider.maxConnections | 25 | 0 | NULL |
| database.defaultProvider.maxWaitTime | 500 | 0 | NULL |
| database.defaultProvider.minConnections | 5 | 0 | NULL |
| database.defaultProvider.minIdleTime | 900000 | 0 | NULL |
| database.defaultProvider.password | 83feb78c84190b5719f5cb1d000f9eb8ea97aca4f5432e2a | 1 | NULL |
| database.defaultProvider.serverURL | jdbc:mysql://192.168.201.106:3306/test?rewriteBatchedStatements=true | 0 | NULL |
| database.defaultProvider.testAfterUse | false | 0 | NULL |
| database.defaultProvider.testBeforeUse | false | 0 | NULL |
| database.defaultProvider.testSQL | select 1 | 0 | NULL |
| database.defaultProvider.testTimeout | 500 | 0 | NULL |
| database.defaultProvider.timeBetweenEvictionRuns | 30000 | 0 | NULL |
| database.defaultProvider.username | 261bf87d039345f83cc733c7deccda5cba2b2a1d9da53e33 | 1 | NULL |
| locale | en | 0 | NULL |
| passwordKey | pZ2Ihyfvmdc7Nyx | 0 | NULL |
| provider.admin.className | org.jivesoftware.openfire.admin.DefaultAdminProvider | 0 | NULL |
| provider.auth.className | org.jivesoftware.openfire.auth.DefaultAuthProvider | 0 | NULL |
| provider.group.className | org.jivesoftware.openfire.group.DefaultGroupProvider | 0 | NULL |
| provider.lockout.className | org.jivesoftware.openfire.lockout.DefaultLockOutProvider | 0 | NULL |
| provider.securityAudit.className | org.jivesoftware.openfire.security.DefaultSecurityAuditProvider | 0 | NULL |
| provider.user.className | org.jivesoftware.openfire.user.DefaultUserProvider | 0 | NULL |
| provider.vcard.className | org.jivesoftware.openfire.vcard.DefaultVCardProvider | 0 | NULL |
| sasl.scram-sha-1.iteration-count | 4096 | 0 | NULL |
| setup | true | 0 | NULL |
| update.lastCheck | 1537149072695 | 0 | NULL |
| xmpp.auth.anonymous | false | 0 | NULL |
| xmpp.domain | 192.168.2.1 | 0 | NULL |
| xmpp.fqdn | 192.168.2.1 | 0 | NULL |
| xmpp.session.conflict-limit | 0 | 0 | NULL |
| xmpp.socket.ssl.active | true | 0 | NULL |
+--------------------------------------------------+----------------------------------------------------------------------+-----------+------+
核心方法JiveProperties#put方法
/**
* Saves a property, optionally encrypting it
*
* @param key
* The name of the property
* @param value
* The value of the property
* @param isEncrypted
* {@code true} to encrypt the property, {@code true} to leave in plain text
* @return The previous value associated with {@code key}, or {@code null} if there was no mapping for
* {@code key}.
*/
public String put(String key, String value, boolean isEncrypted) {
if (value == null) {
// This is the same as deleting, so remove it.
return remove(key);
}
if (key == null) {
throw new NullPointerException("Key cannot be null. Key=" +
key + ", value=" + value);
}
if (key.endsWith(".")) {
key = key.substring(0, key.length()-1);
}
key = key.trim();
String result;
synchronized (this) {
if (properties.containsKey(key)) {
updateProperty(key, value, isEncrypted);
}
else {
insertProperty(key, value, isEncrypted);
}
result = properties.put(key, value);
encrypted.put(key, isEncrypted);
// We now know the database is correct - so we can remove the entry from security.conf
JiveGlobals.clearXMLPropertyEncryptionEntry(key);
}
// Generate event.
Map<String, Object> params = new HashMap<>();
params.put("value", value);
PropertyEventDispatcher.dispatchEvent(key, PropertyEventDispatcher.EventType.property_set, params);
// Send update to other cluster members.
CacheFactory.doClusterTask(PropertyClusterEventTask.createPutTask(key, value, isEncrypted));
return result;
}
简单说 xml 属性 最终同步到数据库 。 通知本机监听 ，通知集群监听
