Examples with DataHostConfig io.mycat.config.model.DataHostConfig used on opensource projects

Example 6 with DataHostConfig

use of io.mycat.config.model.DataHostConfig in project Mycat-Server by MyCATApache.

the class XMLSchemaLoader method loadSchemas.

private void loadSchemas(Element root) {
    NodeList list = root.getElementsByTagName("schema");
    for (int i = 0, n = list.getLength(); i < n; i++) {
        Element schemaElement = (Element) list.item(i);
        //读取各个属性
        String name = schemaElement.getAttribute("name");
        String dataNode = schemaElement.getAttribute("dataNode");
        String checkSQLSchemaStr = schemaElement.getAttribute("checkSQLschema");
        String sqlMaxLimitStr = schemaElement.getAttribute("sqlMaxLimit");
        int sqlMaxLimit = -1;
        //读取sql返回结果集限制
        if (sqlMaxLimitStr != null && !sqlMaxLimitStr.isEmpty()) {
            sqlMaxLimit = Integer.parseInt(sqlMaxLimitStr);
        }
        // check dataNode already exists or not,看schema标签中是否有datanode
        String defaultDbType = null;
        //校验检查并添加dataNode
        if (dataNode != null && !dataNode.isEmpty()) {
            List<String> dataNodeLst = new ArrayList<String>(1);
            dataNodeLst.add(dataNode);
            checkDataNodeExists(dataNodeLst);
            String dataHost = dataNodes.get(dataNode).getDataHost();
            defaultDbType = dataHosts.get(dataHost).getDbType();
        } else {
            dataNode = null;
        }
        //加载schema下所有tables
        Map<String, TableConfig> tables = loadTables(schemaElement);
        //判断schema是否重复
        if (schemas.containsKey(name)) {
            throw new ConfigException("schema " + name + " duplicated!");
        }
        // 设置了table的不需要设置dataNode属性，没有设置table的必须设置dataNode属性
        if (dataNode == null && tables.size() == 0) {
            throw new ConfigException("schema " + name + " didn't config tables,so you must set dataNode property!");
        }
        SchemaConfig schemaConfig = new SchemaConfig(name, dataNode, tables, sqlMaxLimit, "true".equalsIgnoreCase(checkSQLSchemaStr));
        //设定DB类型，这对之后的sql语句路由解析有帮助
        if (defaultDbType != null) {
            schemaConfig.setDefaultDataNodeDbType(defaultDbType);
            if (!"mysql".equalsIgnoreCase(defaultDbType)) {
                schemaConfig.setNeedSupportMultiDBType(true);
            }
        }
        // 判断是否有不是mysql的数据库类型，方便解析判断是否启用多数据库分页语法解析
        for (TableConfig tableConfig : tables.values()) {
            if (isHasMultiDbType(tableConfig)) {
                schemaConfig.setNeedSupportMultiDBType(true);
                break;
            }
        }
        //记录每种dataNode的DB类型
        Map<String, String> dataNodeDbTypeMap = new HashMap<>();
        for (String dataNodeName : dataNodes.keySet()) {
            DataNodeConfig dataNodeConfig = dataNodes.get(dataNodeName);
            String dataHost = dataNodeConfig.getDataHost();
            DataHostConfig dataHostConfig = dataHosts.get(dataHost);
            if (dataHostConfig != null) {
                String dbType = dataHostConfig.getDbType();
                dataNodeDbTypeMap.put(dataNodeName, dbType);
            }
        }
        schemaConfig.setDataNodeDbTypeMap(dataNodeDbTypeMap);
        schemas.put(name, schemaConfig);
    }
}

Example 7 with DataHostConfig

use of io.mycat.config.model.DataHostConfig in project Mycat-Server by MyCATApache.

the class ConfigComparer method getDataNodes.

//获取拆分表对应节点列表,具体到实例地址、库
private List<DataNode> getDataNodes(TableConfig tableConfig, Map<String, DataNodeConfig> dnConfig, Map<String, DataHostConfig> dhConfig) {
    List<DataNode> dataNodes = new ArrayList<DataNode>();
    //TO-DO
    ArrayList<String> dataNodeNames = tableConfig.getDataNodes();
    int i = 0;
    for (String name : dataNodeNames) {
        DataNodeConfig config = dnConfig.get(name);
        String db = config.getDatabase();
        String dataHost = config.getDataHost();
        DataHostConfig dh = dhConfig.get(dataHost);
        String dbType = dh.getDbType();
        DBHostConfig[] writeHosts = dh.getWriteHosts();
        DBHostConfig currentWriteHost;
        if (isAwaysUseMaster) {
            currentWriteHost = writeHosts[0];
        } else {
            //迁移数据发生在当前切换后的数据源
            currentWriteHost = writeHosts[Integer.valueOf(dnIndexProps.getProperty(dh.getName()))];
        }
        DataNode dn = new DataNode(name, currentWriteHost.getIp(), currentWriteHost.getPort(), currentWriteHost.getUser(), currentWriteHost.getPassword(), db, dbType, i++);
        dataNodes.add(dn);
    }
    return dataNodes;
}

Example 8 with DataHostConfig

use of io.mycat.config.model.DataHostConfig in project Mycat-Server by MyCATApache.

the class ConfigTest method testTempReadHostAvailable.

/**
	 * 测试 临时读可用 配置
	 */
@Test
public void testTempReadHostAvailable() {
    PhysicalDBPool pool = this.dataHosts.get("localhost2");
    DataHostConfig hostConfig = pool.getSource().getHostConfig();
    Assert.assertTrue(hostConfig.isTempReadHostAvailable() == true);
}