Revert "add jdbc"

This reverts commit a6e48b7690.

weed/command/command.go

@@ -30,7 +30,6 @@ var Commands = []*Command{
 	cmdFix,
 	cmdFuse,
 	cmdIam,
-	cmdJdbc,
 	cmdMaster,
 	cmdMasterFollower,
 	cmdMount,

weed/command/jdbc.go

@@ -1,141 +0,0 @@
-package command
-
-import (
-	"context"
-	"fmt"
-	"os"
-	"os/signal"
-	"syscall"
-	"time"
-
-	weed_server "github.com/seaweedfs/seaweedfs/weed/server"
-	"github.com/seaweedfs/seaweedfs/weed/util"
-)
-
-var (
-	jdbcOptions JdbcOptions
-)
-
-type JdbcOptions struct {
-	host       *string
-	port       *int
-	masterAddr *string
-}
-
-func init() {
-	cmdJdbc.Run = runJdbc // break init cycle
-	jdbcOptions.host = cmdJdbc.Flag.String("host", "localhost", "JDBC server host")
-	jdbcOptions.port = cmdJdbc.Flag.Int("port", 8089, "JDBC server port")
-	jdbcOptions.masterAddr = cmdJdbc.Flag.String("master", "localhost:9333", "SeaweedFS master server address")
-}
-
-var cmdJdbc = &Command{
-	UsageLine: "jdbc -port=8089 -master=<master_server>",
-	Short:     "start a JDBC server for SQL queries",
-	Long: `Start a JDBC server that provides SQL query access to SeaweedFS.
-	
-This JDBC server allows standard JDBC clients and tools to connect to SeaweedFS
-and execute SQL queries against MQ topics. It implements a subset of the JDBC
-protocol for compatibility with most database tools and applications.
-
-Examples:
-
-	# Start JDBC server on default port 8089
-	weed jdbc
-	
-	# Start on custom port with specific master
-	weed jdbc -port=8090 -master=master1:9333
-	
-	# Allow connections from any host
-	weed jdbc -host=0.0.0.0 -port=8089
-
-Clients can then connect using JDBC URL:
-	jdbc:seaweedfs://hostname:port/database
-
-Supported SQL operations:
-	- SELECT queries on MQ topics
-	- DESCRIBE/DESC commands
-	- SHOW DATABASES/TABLES commands
-	- Aggregation functions (COUNT, SUM, AVG, MIN, MAX)
-	- WHERE clauses with filtering
-	- System columns (_timestamp_ns, _key, _source)
-
-Compatible with:
-	- Standard JDBC tools (DBeaver, IntelliJ DataGrip, etc.)
-	- Business Intelligence tools (Tableau, Power BI, etc.)
-	- Java applications using JDBC drivers
-	- SQL reporting tools
-
-`,
-}
-
-func runJdbc(cmd *Command, args []string) bool {
-
-	util.LoadConfiguration("security", false)
-
-	// Validate options
-	if *jdbcOptions.masterAddr == "" {
-		fmt.Fprintf(os.Stderr, "Error: master address is required\n")
-		return false
-	}
-
-	// Create JDBC server
-	jdbcServer, err := weed_server.NewJDBCServer(*jdbcOptions.host, *jdbcOptions.port, *jdbcOptions.masterAddr)
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "Error creating JDBC server: %v\n", err)
-		return false
-	}
-
-	// Start the server
-	fmt.Printf("Starting SeaweedFS JDBC Server...\n")
-	fmt.Printf("Host: %s\n", *jdbcOptions.host)
-	fmt.Printf("Port: %d\n", *jdbcOptions.port)
-	fmt.Printf("Master: %s\n", *jdbcOptions.masterAddr)
-	fmt.Printf("\nJDBC URL: jdbc:seaweedfs://%s:%d/default\n", *jdbcOptions.host, *jdbcOptions.port)
-	fmt.Printf("\nSupported operations:\n")
-	fmt.Printf("  - SELECT queries on MQ topics\n")
-	fmt.Printf("  - DESCRIBE/DESC table_name\n")
-	fmt.Printf("  - SHOW DATABASES\n")
-	fmt.Printf("  - SHOW TABLES\n")
-	fmt.Printf("  - Aggregations: COUNT, SUM, AVG, MIN, MAX\n")
-	fmt.Printf("  - System columns: _timestamp_ns, _key, _source\n")
-	fmt.Printf("\nReady for JDBC connections!\n\n")
-
-	err = jdbcServer.Start()
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "Error starting JDBC server: %v\n", err)
-		return false
-	}
-
-	// Set up signal handling for graceful shutdown
-	sigChan := make(chan os.Signal, 1)
-	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
-
-	// Wait for shutdown signal
-	<-sigChan
-	fmt.Printf("\nReceived shutdown signal, stopping JDBC server...\n")
-
-	// Create context with timeout for graceful shutdown
-	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
-	defer cancel()
-
-	// Stop the server with timeout
-	done := make(chan error, 1)
-	go func() {
-		done <- jdbcServer.Stop()
-	}()
-
-	select {
-	case err := <-done:
-		if err != nil {
-			fmt.Fprintf(os.Stderr, "Error stopping JDBC server: %v\n", err)
-			return false
-		}
-		fmt.Printf("JDBC server stopped successfully\n")
-	case <-ctx.Done():
-		fmt.Fprintf(os.Stderr, "Timeout waiting for JDBC server to stop\n")
-		return false
-	}
-
-	return true
-}