https://github.com/eclipse-vertx/vertx-sql-client: The Reactive MySQL Client (Eclipse) 
public class io.vertx.mysqlclient.impl.MySQLSocketConnection extends io.vertx.sqlclient.impl.SocketConnectionBase
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: io.vertx.mysqlclient.impl.MySQLSocketConnection
  super_class: io.vertx.sqlclient.impl.SocketConnectionBase
{
  public io.vertx.mysqlclient.impl.MySQLDatabaseMetadata metaData;
    descriptor: Lio/vertx/mysqlclient/impl/MySQLDatabaseMetadata;
    flags: (0x0001) ACC_PUBLIC

  private io.vertx.mysqlclient.impl.codec.MySQLCodec codec;
    descriptor: Lio/vertx/mysqlclient/impl/codec/MySQLCodec;
    flags: (0x0002) ACC_PRIVATE

  public void <init>(io.vertx.core.net.impl.NetSocketInternal, boolean, int, java.util.function.Predicate<java.lang.String>, io.vertx.core.impl.ContextInternal);
    descriptor: (Lio/vertx/core/net/impl/NetSocketInternal;ZILjava/util/function/Predicate;Lio/vertx/core/impl/ContextInternal;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=7, locals=6, args_size=6
        start local 0 // io.vertx.mysqlclient.impl.MySQLSocketConnection this
        start local 1 // io.vertx.core.net.impl.NetSocketInternal socket
        start local 2 // boolean cachePreparedStatements
        start local 3 // int preparedStatementCacheSize
        start local 4 // java.util.function.Predicate preparedStatementCacheSqlFilter
        start local 5 // io.vertx.core.impl.ContextInternal context
         0: .line 55
            aload 0 /* this */
            aload 1 /* socket */
            iload 2 /* cachePreparedStatements */
            iload 3 /* preparedStatementCacheSize */
            aload 4 /* preparedStatementCacheSqlFilter */
            iconst_1
            aload 5 /* context */
            invokespecial io.vertx.sqlclient.impl.SocketConnectionBase.<init>:(Lio/vertx/core/net/impl/NetSocketInternal;ZILjava/util/function/Predicate;ILio/vertx/core/impl/ContextInternal;)V
         1: .line 56
            return
        end local 5 // io.vertx.core.impl.ContextInternal context
        end local 4 // java.util.function.Predicate preparedStatementCacheSqlFilter
        end local 3 // int preparedStatementCacheSize
        end local 2 // boolean cachePreparedStatements
        end local 1 // io.vertx.core.net.impl.NetSocketInternal socket
        end local 0 // io.vertx.mysqlclient.impl.MySQLSocketConnection this
      LocalVariableTable:
        Start  End  Slot                             Name  Signature
            0    2     0                             this  Lio/vertx/mysqlclient/impl/MySQLSocketConnection;
            0    2     1                           socket  Lio/vertx/core/net/impl/NetSocketInternal;
            0    2     2          cachePreparedStatements  Z
            0    2     3       preparedStatementCacheSize  I
            0    2     4  preparedStatementCacheSqlFilter  Ljava/util/function/Predicate<Ljava/lang/String;>;
            0    2     5                          context  Lio/vertx/core/impl/ContextInternal;
    Signature: (Lio/vertx/core/net/impl/NetSocketInternal;ZILjava/util/function/Predicate<Ljava/lang/String;>;Lio/vertx/core/impl/ContextInternal;)V
    MethodParameters:
                                 Name  Flags
      socket                           
      cachePreparedStatements          
      preparedStatementCacheSize       
      preparedStatementCacheSqlFilter  
      context                          

  void sendStartupMessage(java.lang.String, java.lang.String, java.lang.String, io.vertx.mysqlclient.impl.MySQLCollation, io.vertx.core.buffer.Buffer, java.util.Map<java.lang.String, java.lang.String>, io.vertx.mysqlclient.SslMode, int, java.nio.charset.Charset, io.vertx.mysqlclient.MySQLAuthenticationPlugin, io.vertx.core.Promise<io.vertx.sqlclient.impl.Connection>);
    descriptor: (Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Lio/vertx/mysqlclient/impl/MySQLCollation;Lio/vertx/core/buffer/Buffer;Ljava/util/Map;Lio/vertx/mysqlclient/SslMode;ILjava/nio/charset/Charset;Lio/vertx/mysqlclient/MySQLAuthenticationPlugin;Lio/vertx/core/Promise;)V
    flags: (0x0000) 
    Code:
      stack=13, locals=13, args_size=12
        start local 0 // io.vertx.mysqlclient.impl.MySQLSocketConnection this
        start local 1 // java.lang.String username
        start local 2 // java.lang.String password
        start local 3 // java.lang.String database
        start local 4 // io.vertx.mysqlclient.impl.MySQLCollation collation
        start local 5 // io.vertx.core.buffer.Buffer serverRsaPublicKey
        start local 6 // java.util.Map properties
        start local 7 // io.vertx.mysqlclient.SslMode sslMode
        start local 8 // int initialCapabilitiesFlags
        start local 9 // java.nio.charset.Charset charsetEncoding
        start local 10 // io.vertx.mysqlclient.MySQLAuthenticationPlugin authenticationPlugin
        start local 11 // io.vertx.core.Promise completionHandler
         0: .line 69
            new io.vertx.mysqlclient.impl.command.InitialHandshakeCommand
            dup
            aload 0 /* this */
            aload 1 /* username */
            aload 2 /* password */
            aload 3 /* database */
            aload 4 /* collation */
            aload 5 /* serverRsaPublicKey */
            aload 6 /* properties */
            aload 7 /* sslMode */
            iload 8 /* initialCapabilitiesFlags */
            aload 9 /* charsetEncoding */
            aload 10 /* authenticationPlugin */
            invokespecial io.vertx.mysqlclient.impl.command.InitialHandshakeCommand.<init>:(Lio/vertx/sqlclient/impl/SocketConnectionBase;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Lio/vertx/mysqlclient/impl/MySQLCollation;Lio/vertx/core/buffer/Buffer;Ljava/util/Map;Lio/vertx/mysqlclient/SslMode;ILjava/nio/charset/Charset;Lio/vertx/mysqlclient/MySQLAuthenticationPlugin;)V
            astore 12 /* cmd */
        start local 12 // io.vertx.mysqlclient.impl.command.InitialHandshakeCommand cmd
         1: .line 70
            aload 0 /* this */
            aload 12 /* cmd */
            aload 11 /* completionHandler */
            invokevirtual io.vertx.mysqlclient.impl.MySQLSocketConnection.schedule:(Lio/vertx/sqlclient/impl/command/CommandBase;Lio/vertx/core/Promise;)V
         2: .line 71
            return
        end local 12 // io.vertx.mysqlclient.impl.command.InitialHandshakeCommand cmd
        end local 11 // io.vertx.core.Promise completionHandler
        end local 10 // io.vertx.mysqlclient.MySQLAuthenticationPlugin authenticationPlugin
        end local 9 // java.nio.charset.Charset charsetEncoding
        end local 8 // int initialCapabilitiesFlags
        end local 7 // io.vertx.mysqlclient.SslMode sslMode
        end local 6 // java.util.Map properties
        end local 5 // io.vertx.core.buffer.Buffer serverRsaPublicKey
        end local 4 // io.vertx.mysqlclient.impl.MySQLCollation collation
        end local 3 // java.lang.String database
        end local 2 // java.lang.String password
        end local 1 // java.lang.String username
        end local 0 // io.vertx.mysqlclient.impl.MySQLSocketConnection this
      LocalVariableTable:
        Start  End  Slot                      Name  Signature
            0    3     0                      this  Lio/vertx/mysqlclient/impl/MySQLSocketConnection;
            0    3     1                  username  Ljava/lang/String;
            0    3     2                  password  Ljava/lang/String;
            0    3     3                  database  Ljava/lang/String;
            0    3     4                 collation  Lio/vertx/mysqlclient/impl/MySQLCollation;
            0    3     5        serverRsaPublicKey  Lio/vertx/core/buffer/Buffer;
            0    3     6                properties  Ljava/util/Map<Ljava/lang/String;Ljava/lang/String;>;
            0    3     7                   sslMode  Lio/vertx/mysqlclient/SslMode;
            0    3     8  initialCapabilitiesFlags  I
            0    3     9           charsetEncoding  Ljava/nio/charset/Charset;
            0    3    10      authenticationPlugin  Lio/vertx/mysqlclient/MySQLAuthenticationPlugin;
            0    3    11         completionHandler  Lio/vertx/core/Promise<Lio/vertx/sqlclient/impl/Connection;>;
            1    3    12                       cmd  Lio/vertx/mysqlclient/impl/command/InitialHandshakeCommand;
    Signature: (Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Lio/vertx/mysqlclient/impl/MySQLCollation;Lio/vertx/core/buffer/Buffer;Ljava/util/Map<Ljava/lang/String;Ljava/lang/String;>;Lio/vertx/mysqlclient/SslMode;ILjava/nio/charset/Charset;Lio/vertx/mysqlclient/MySQLAuthenticationPlugin;Lio/vertx/core/Promise<Lio/vertx/sqlclient/impl/Connection;>;)V
    MethodParameters:
                          Name  Flags
      username                  
      password                  
      database                  
      collation                 
      serverRsaPublicKey        
      properties                
      sslMode                   
      initialCapabilitiesFlags  
      charsetEncoding           
      authenticationPlugin      
      completionHandler         

  public void init();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=1
        start local 0 // io.vertx.mysqlclient.impl.MySQLSocketConnection this
         0: .line 75
            aload 0 /* this */
            new io.vertx.mysqlclient.impl.codec.MySQLCodec
            dup
            aload 0 /* this */
            invokespecial io.vertx.mysqlclient.impl.codec.MySQLCodec.<init>:(Lio/vertx/mysqlclient/impl/MySQLSocketConnection;)V
            putfield io.vertx.mysqlclient.impl.MySQLSocketConnection.codec:Lio/vertx/mysqlclient/impl/codec/MySQLCodec;
         1: .line 76
            aload 0 /* this */
            getfield io.vertx.mysqlclient.impl.MySQLSocketConnection.socket:Lio/vertx/core/net/impl/NetSocketInternal;
            invokeinterface io.vertx.core.net.impl.NetSocketInternal.channelHandlerContext:()Lio/netty/channel/ChannelHandlerContext;
            invokeinterface io.netty.channel.ChannelHandlerContext.pipeline:()Lio/netty/channel/ChannelPipeline;
            astore 1 /* pipeline */
        start local 1 // io.netty.channel.ChannelPipeline pipeline
         2: .line 77
            aload 1 /* pipeline */
            ldc "handler"
            ldc "codec"
            aload 0 /* this */
            getfield io.vertx.mysqlclient.impl.MySQLSocketConnection.codec:Lio/vertx/mysqlclient/impl/codec/MySQLCodec;
            invokeinterface io.netty.channel.ChannelPipeline.addBefore:(Ljava/lang/String;Ljava/lang/String;Lio/netty/channel/ChannelHandler;)Lio/netty/channel/ChannelPipeline;
            pop
         3: .line 78
            aload 0 /* this */
            invokespecial io.vertx.sqlclient.impl.SocketConnectionBase.init:()V
         4: .line 79
            return
        end local 1 // io.netty.channel.ChannelPipeline pipeline
        end local 0 // io.vertx.mysqlclient.impl.MySQLSocketConnection this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    5     0      this  Lio/vertx/mysqlclient/impl/MySQLSocketConnection;
            2    5     1  pipeline  Lio/netty/channel/ChannelPipeline;

  protected <R> void doSchedule(io.vertx.sqlclient.impl.command.CommandBase<R>, io.vertx.core.Handler<io.vertx.core.AsyncResult<R>>);
    descriptor: (Lio/vertx/sqlclient/impl/command/CommandBase;Lio/vertx/core/Handler;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=7, locals=5, args_size=3
        start local 0 // io.vertx.mysqlclient.impl.MySQLSocketConnection this
        start local 1 // io.vertx.sqlclient.impl.command.CommandBase cmd
        start local 2 // io.vertx.core.Handler handler
         0: .line 83
            aload 1 /* cmd */
            instanceof io.vertx.sqlclient.impl.command.TxCommand
            ifeq 11
         1: .line 84
            aload 1 /* cmd */
            checkcast io.vertx.sqlclient.impl.command.TxCommand
            astore 3 /* tx */
        start local 3 // io.vertx.sqlclient.impl.command.TxCommand tx
         2: .line 85
            new io.vertx.sqlclient.impl.command.SimpleQueryCommand
            dup
         3: .line 86
            aload 3 /* tx */
            getfield io.vertx.sqlclient.impl.command.TxCommand.kind:Lio/vertx/sqlclient/impl/command/TxCommand$Kind;
            getfield io.vertx.sqlclient.impl.command.TxCommand$Kind.sql:Ljava/lang/String;
         4: .line 87
            iconst_0
         5: .line 88
            iconst_0
         6: .line 89
            getstatic io.vertx.sqlclient.impl.command.QueryCommandBase.NULL_COLLECTOR:Ljava/util/stream/Collector;
         7: .line 90
            getstatic io.vertx.sqlclient.impl.QueryResultHandler.NOOP_HANDLER:Lio/vertx/sqlclient/impl/QueryResultHandler;
         8: .line 85
            invokespecial io.vertx.sqlclient.impl.command.SimpleQueryCommand.<init>:(Ljava/lang/String;ZZLjava/util/stream/Collector;Lio/vertx/sqlclient/impl/QueryResultHandler;)V
            astore 4 /* cmd2 */
        start local 4 // io.vertx.sqlclient.impl.command.SimpleQueryCommand cmd2
         9: .line 91
            aload 0 /* this */
            aload 4 /* cmd2 */
            aload 2 /* handler */
            aload 3 /* tx */
            invokedynamic handle(Lio/vertx/core/Handler;Lio/vertx/sqlclient/impl/command/TxCommand;)Lio/vertx/core/Handler;
              Bootstrap: invokestatic java.lang.invoke.LambdaMetafactory.metafactory:(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;
                Method arguments:
                  (Ljava/lang/Object;)V
                  io/vertx/mysqlclient/impl/MySQLSocketConnection.lambda$0(Lio/vertx/core/Handler;Lio/vertx/sqlclient/impl/command/TxCommand;Lio/vertx/core/AsyncResult;)V (6)
                  (Lio/vertx/core/AsyncResult;)V
            invokespecial io.vertx.sqlclient.impl.SocketConnectionBase.doSchedule:(Lio/vertx/sqlclient/impl/command/CommandBase;Lio/vertx/core/Handler;)V
        end local 4 // io.vertx.sqlclient.impl.command.SimpleQueryCommand cmd2
        end local 3 // io.vertx.sqlclient.impl.command.TxCommand tx
        10: .line 92
            goto 12
        11: .line 93
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 1 /* cmd */
            aload 2 /* handler */
            invokespecial io.vertx.sqlclient.impl.SocketConnectionBase.doSchedule:(Lio/vertx/sqlclient/impl/command/CommandBase;Lio/vertx/core/Handler;)V
        12: .line 95
      StackMap locals:
      StackMap stack:
            return
        end local 2 // io.vertx.core.Handler handler
        end local 1 // io.vertx.sqlclient.impl.command.CommandBase cmd
        end local 0 // io.vertx.mysqlclient.impl.MySQLSocketConnection this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0   13     0     this  Lio/vertx/mysqlclient/impl/MySQLSocketConnection;
            0   13     1      cmd  Lio/vertx/sqlclient/impl/command/CommandBase<TR;>;
            0   13     2  handler  Lio/vertx/core/Handler<Lio/vertx/core/AsyncResult<TR;>;>;
            2   10     3       tx  Lio/vertx/sqlclient/impl/command/TxCommand<TR;>;
            9   10     4     cmd2  Lio/vertx/sqlclient/impl/command/SimpleQueryCommand<Ljava/lang/Void;>;
    Signature: <R:Ljava/lang/Object;>(Lio/vertx/sqlclient/impl/command/CommandBase<TR;>;Lio/vertx/core/Handler<Lio/vertx/core/AsyncResult<TR;>;>;)V
    MethodParameters:
         Name  Flags
      cmd      
      handler  

  public void upgradeToSsl(io.vertx.core.Handler<io.vertx.core.AsyncResult<java.lang.Void>>);
    descriptor: (Lio/vertx/core/Handler;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // io.vertx.mysqlclient.impl.MySQLSocketConnection this
        start local 1 // io.vertx.core.Handler completionHandler
         0: .line 98
            aload 0 /* this */
            getfield io.vertx.mysqlclient.impl.MySQLSocketConnection.socket:Lio/vertx/core/net/impl/NetSocketInternal;
            aload 1 /* completionHandler */
            invokeinterface io.vertx.core.net.impl.NetSocketInternal.upgradeToSsl:(Lio/vertx/core/Handler;)Lio/vertx/core/net/NetSocket;
            pop
         1: .line 99
            return
        end local 1 // io.vertx.core.Handler completionHandler
        end local 0 // io.vertx.mysqlclient.impl.MySQLSocketConnection this
      LocalVariableTable:
        Start  End  Slot               Name  Signature
            0    2     0               this  Lio/vertx/mysqlclient/impl/MySQLSocketConnection;
            0    2     1  completionHandler  Lio/vertx/core/Handler<Lio/vertx/core/AsyncResult<Ljava/lang/Void;>;>;
    Signature: (Lio/vertx/core/Handler<Lio/vertx/core/AsyncResult<Ljava/lang/Void;>;>;)V
    MethodParameters:
                   Name  Flags
      completionHandler  

  public io.vertx.sqlclient.spi.DatabaseMetadata getDatabaseMetaData();
    descriptor: ()Lio/vertx/sqlclient/spi/DatabaseMetadata;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.vertx.mysqlclient.impl.MySQLSocketConnection this
         0: .line 103
            aload 0 /* this */
            getfield io.vertx.mysqlclient.impl.MySQLSocketConnection.metaData:Lio/vertx/mysqlclient/impl/MySQLDatabaseMetadata;
            areturn
        end local 0 // io.vertx.mysqlclient.impl.MySQLSocketConnection this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/vertx/mysqlclient/impl/MySQLSocketConnection;

  private static void lambda$0(io.vertx.core.Handler, io.vertx.sqlclient.impl.command.TxCommand, io.vertx.core.AsyncResult);
    descriptor: (Lio/vertx/core/Handler;Lio/vertx/sqlclient/impl/command/TxCommand;Lio/vertx/core/AsyncResult;)V
    flags: (0x100a) ACC_PRIVATE, ACC_STATIC, ACC_SYNTHETIC
    Code:
      stack=3, locals=3, args_size=3
        start local 2 // io.vertx.core.AsyncResult ar
         0: .line 91
            aload 0
            aload 2 /* ar */
            aload 1
            getfield io.vertx.sqlclient.impl.command.TxCommand.result:Ljava/lang/Object;
            invokeinterface io.vertx.core.AsyncResult.map:(Ljava/lang/Object;)Lio/vertx/core/AsyncResult;
            invokeinterface io.vertx.core.Handler.handle:(Ljava/lang/Object;)V
            return
        end local 2 // io.vertx.core.AsyncResult ar
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     2    ar  Lio/vertx/core/AsyncResult<Ljava/lang/Boolean;>;
}
SourceFile: "MySQLSocketConnection.java"
InnerClasses:
  public final Kind = io.vertx.sqlclient.impl.command.TxCommand$Kind of io.vertx.sqlclient.impl.command.TxCommand
  public final Lookup = java.lang.invoke.MethodHandles$Lookup of java.lang.invoke.MethodHandles