use of io.mycat.net.NIOProcessor in project Mycat-Server by MyCATApache.
the class ReloadConfig method reload_all.
public static boolean reload_all() {
/**
* 1、载入新的配置
* 1.1、ConfigInitializer 初始化,基本自检
* 1.2、DataNode/DataHost 实际链路检测
*/
ConfigInitializer loader = new ConfigInitializer(true);
Map<String, UserConfig> newUsers = loader.getUsers();
Map<String, SchemaConfig> newSchemas = loader.getSchemas();
Map<String, PhysicalDBNode> newDataNodes = loader.getDataNodes();
Map<String, PhysicalDBPool> newDataHosts = loader.getDataHosts();
MycatCluster newCluster = loader.getCluster();
FirewallConfig newFirewall = loader.getFirewall();
/**
* 1.2、实际链路检测
*/
loader.testConnection();
/**
* 2、承接
* 2.1、老的 dataSource 继续承接新建请求
* 2.2、新的 dataSource 开始初始化, 完毕后交由 2.3
* 2.3、新的 dataSource 开始承接新建请求
* 2.4、老的 dataSource 内部的事务执行完毕, 相继关闭
* 2.5、老的 dataSource 超过阀值的,强制关闭
*/
MycatConfig config = MycatServer.getInstance().getConfig();
/**
* 2.1 、老的 dataSource 继续承接新建请求, 此处什么也不需要做
*/
boolean isReloadStatusOK = true;
/**
* 2.2、新的 dataHosts 初始化
*/
for (PhysicalDBPool dbPool : newDataHosts.values()) {
String hostName = dbPool.getHostName();
// 设置 schemas
ArrayList<String> dnSchemas = new ArrayList<String>(30);
for (PhysicalDBNode dn : newDataNodes.values()) {
if (dn.getDbPool().getHostName().equals(hostName)) {
dnSchemas.add(dn.getDatabase());
}
}
dbPool.setSchemas(dnSchemas.toArray(new String[dnSchemas.size()]));
// 获取 data host
String dnIndex = DnPropertyUtil.loadDnIndexProps().getProperty(dbPool.getHostName(), "0");
if (!"0".equals(dnIndex)) {
LOGGER.info("init datahost: " + dbPool.getHostName() + " to use datasource index:" + dnIndex);
}
dbPool.init(Integer.valueOf(dnIndex));
if (!dbPool.isInitSuccess()) {
isReloadStatusOK = false;
break;
}
}
/**
* TODO: 确认初始化情况
*
* 新的 dataHosts 是否初始化成功
*/
if (isReloadStatusOK) {
/**
* 2.3、 在老的配置上,应用新的配置,开始准备承接任务
*/
config.reload(newUsers, newSchemas, newDataNodes, newDataHosts, newCluster, newFirewall, true);
/**
* 2.4、 处理旧的资源
*/
LOGGER.warn("1、clear old backend connection(size): " + NIOProcessor.backends_old.size());
// 清除前一次 reload 转移出去的 old Cons
Iterator<BackendConnection> iter = NIOProcessor.backends_old.iterator();
while (iter.hasNext()) {
BackendConnection con = iter.next();
con.close("clear old datasources");
iter.remove();
}
Map<String, PhysicalDBPool> oldDataHosts = config.getBackupDataHosts();
for (PhysicalDBPool dbPool : oldDataHosts.values()) {
dbPool.stopHeartbeat();
// 提取数据源下的所有连接
for (PhysicalDatasource ds : dbPool.getAllDataSources()) {
//
for (NIOProcessor processor : MycatServer.getInstance().getProcessors()) {
for (BackendConnection con : processor.getBackends().values()) {
if (con instanceof MySQLConnection) {
MySQLConnection mysqlCon = (MySQLConnection) con;
if (mysqlCon.getPool() == ds) {
NIOProcessor.backends_old.add(con);
}
} else if (con instanceof JDBCConnection) {
JDBCConnection jdbcCon = (JDBCConnection) con;
if (jdbcCon.getPool() == ds) {
NIOProcessor.backends_old.add(con);
}
}
}
}
}
}
LOGGER.warn("2、to be recycled old backend connection(size): " + NIOProcessor.backends_old.size());
//清理缓存
MycatServer.getInstance().getCacheService().clearCache();
MycatServer.getInstance().initRuleData();
return true;
} else {
// 如果重载不成功,则清理已初始化的资源。
LOGGER.warn("reload failed, clear previously created datasources ");
for (PhysicalDBPool dbPool : newDataHosts.values()) {
dbPool.clearDataSources("reload config");
dbPool.stopHeartbeat();
}
return false;
}
}
use of io.mycat.net.NIOProcessor in project Mycat-Server by MyCATApache.
the class ShowConnectionSQL method execute.
public static void execute(ManagerConnection c) {
ByteBuffer buffer = c.allocate();
// write header
buffer = header.write(buffer, c, true);
// write fields
for (FieldPacket field : fields) {
buffer = field.write(buffer, c, true);
}
// write eof
buffer = eof.write(buffer, c, true);
// write rows
byte packetId = eof.packetId;
String charset = c.getCharset();
for (NIOProcessor p : MycatServer.getInstance().getProcessors()) {
for (FrontendConnection fc : p.getFrontends().values()) {
if (!fc.isClosed()) {
RowDataPacket row = getRow(fc, charset);
row.packetId = ++packetId;
buffer = row.write(buffer, c, true);
}
}
}
// write last eof
EOFPacket lastEof = new EOFPacket();
lastEof.packetId = ++packetId;
buffer = lastEof.write(buffer, c, true);
// write buffer
c.write(buffer);
}
use of io.mycat.net.NIOProcessor in project Mycat-Server by MyCATApache.
the class ShowProcessor method execute.
public static void execute(ManagerConnection c) {
ByteBuffer buffer = c.allocate();
// write header
buffer = header.write(buffer, c, true);
// write fields
for (FieldPacket field : fields) {
buffer = field.write(buffer, c, true);
}
// write eof
buffer = eof.write(buffer, c, true);
// write rows
byte packetId = eof.packetId;
for (NIOProcessor p : MycatServer.getInstance().getProcessors()) {
RowDataPacket row = getRow(p, c.getCharset());
row.packetId = ++packetId;
buffer = row.write(buffer, c, true);
}
// write last eof
EOFPacket lastEof = new EOFPacket();
lastEof.packetId = ++packetId;
buffer = lastEof.write(buffer, c, true);
// write buffer
c.write(buffer);
}
use of io.mycat.net.NIOProcessor in project Mycat-Server by MyCATApache.
the class FrontendAuthenticator method isDegrade.
//TODO: add by zhuam
//前端 connection 达到该用户设定的阀值后, 立马降级拒绝连接
protected boolean isDegrade(String user) {
int benchmark = source.getPrivileges().getBenchmark(user);
if (benchmark > 0) {
int forntedsLength = 0;
NIOProcessor[] processors = MycatServer.getInstance().getProcessors();
for (NIOProcessor p : processors) {
forntedsLength += p.getForntedsLength();
}
if (forntedsLength >= benchmark) {
return true;
}
}
return false;
}
use of io.mycat.net.NIOProcessor in project Mycat-Server by MyCATApache.
the class KillHandler method handle.
public static void handle(String stmt, int offset, ServerConnection c) {
String id = stmt.substring(offset).trim();
if (StringUtil.isEmpty(id)) {
c.writeErrMessage(ErrorCode.ER_NO_SUCH_THREAD, "NULL connection id");
} else {
// get value
long value = 0;
try {
value = Long.parseLong(id);
} catch (NumberFormatException e) {
c.writeErrMessage(ErrorCode.ER_NO_SUCH_THREAD, "Invalid connection id:" + id);
return;
}
// kill myself
if (value == c.getId()) {
getOkPacket().write(c);
c.write(c.allocate());
return;
}
// get connection and close it
FrontendConnection fc = null;
NIOProcessor[] processors = MycatServer.getInstance().getProcessors();
for (NIOProcessor p : processors) {
if ((fc = p.getFrontends().get(value)) != null) {
break;
}
}
if (fc != null) {
fc.close("killed");
getOkPacket().write(c);
} else {
c.writeErrMessage(ErrorCode.ER_NO_SUCH_THREAD, "Unknown connection id:" + id);
}
}
}
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