Examples with NIOProcessor io.mycat.net.NIOProcessor used on opensource projects

Example 11 with NIOProcessor

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;
    }
}

Example 12 with NIOProcessor

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);
}

Example 13 with NIOProcessor

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);
}

Example 14 with NIOProcessor

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;
}

Example 15 with NIOProcessor

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);
        }
    }
}