https://github.com/eclipse-vertx/vertx-sql-client: The Reactive PostgreSQL client (Eclipse) 
public class io.vertx.pgclient.impl.PgSocketConnection extends io.vertx.sqlclient.impl.SocketConnectionBase
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: io.vertx.pgclient.impl.PgSocketConnection
  super_class: io.vertx.sqlclient.impl.SocketConnectionBase
{
  private io.vertx.pgclient.impl.codec.PgCodec codec;
    descriptor: Lio/vertx/pgclient/impl/codec/PgCodec;
    flags: (0x0002) ACC_PRIVATE

  public int processId;
    descriptor: I
    flags: (0x0001) ACC_PUBLIC

  public int secretKey;
    descriptor: I
    flags: (0x0001) ACC_PUBLIC

  public void <init>(io.vertx.core.impl.NetSocketInternal, boolean, int, int, int, io.vertx.core.Context);
    descriptor: (Lio/vertx/core/impl/NetSocketInternal;ZIIILio/vertx/core/Context;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=7, locals=7, args_size=7
        start local 0 // io.vertx.pgclient.impl.PgSocketConnection this
        start local 1 // io.vertx.core.impl.NetSocketInternal socket
        start local 2 // boolean cachePreparedStatements
        start local 3 // int preparedStatementCacheSize
        start local 4 // int preparedStatementCacheSqlLimit
        start local 5 // int pipeliningLimit
        start local 6 // io.vertx.core.Context context
         0: .line 48
            aload 0 /* this */
            aload 1 /* socket */
            iload 2 /* cachePreparedStatements */
            iload 3 /* preparedStatementCacheSize */
            iload 4 /* preparedStatementCacheSqlLimit */
            iload 5 /* pipeliningLimit */
            aload 6 /* context */
            invokespecial io.vertx.sqlclient.impl.SocketConnectionBase.<init>:(Lio/vertx/core/impl/NetSocketInternal;ZIIILio/vertx/core/Context;)V
         1: .line 49
            return
        end local 6 // io.vertx.core.Context context
        end local 5 // int pipeliningLimit
        end local 4 // int preparedStatementCacheSqlLimit
        end local 3 // int preparedStatementCacheSize
        end local 2 // boolean cachePreparedStatements
        end local 1 // io.vertx.core.impl.NetSocketInternal socket
        end local 0 // io.vertx.pgclient.impl.PgSocketConnection this
      LocalVariableTable:
        Start  End  Slot                            Name  Signature
            0    2     0                            this  Lio/vertx/pgclient/impl/PgSocketConnection;
            0    2     1                          socket  Lio/vertx/core/impl/NetSocketInternal;
            0    2     2         cachePreparedStatements  Z
            0    2     3      preparedStatementCacheSize  I
            0    2     4  preparedStatementCacheSqlLimit  I
            0    2     5                 pipeliningLimit  I
            0    2     6                         context  Lio/vertx/core/Context;
    MethodParameters:
                                Name  Flags
      socket                          
      cachePreparedStatements         
      preparedStatementCacheSize      
      preparedStatementCacheSqlLimit  
      pipeliningLimit                 
      context                         

  public void init();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=1
        start local 0 // io.vertx.pgclient.impl.PgSocketConnection this
         0: .line 53
            aload 0 /* this */
            new io.vertx.pgclient.impl.codec.PgCodec
            dup
            invokespecial io.vertx.pgclient.impl.codec.PgCodec.<init>:()V
            putfield io.vertx.pgclient.impl.PgSocketConnection.codec:Lio/vertx/pgclient/impl/codec/PgCodec;
         1: .line 54
            aload 0 /* this */
            getfield io.vertx.pgclient.impl.PgSocketConnection.socket:Lio/vertx/core/impl/NetSocketInternal;
            invokeinterface io.vertx.core.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 55
            aload 1 /* pipeline */
            ldc "handler"
            ldc "codec"
            aload 0 /* this */
            getfield io.vertx.pgclient.impl.PgSocketConnection.codec:Lio/vertx/pgclient/impl/codec/PgCodec;
            invokeinterface io.netty.channel.ChannelPipeline.addBefore:(Ljava/lang/String;Ljava/lang/String;Lio/netty/channel/ChannelHandler;)Lio/netty/channel/ChannelPipeline;
            pop
         3: .line 56
            aload 0 /* this */
            invokespecial io.vertx.sqlclient.impl.SocketConnectionBase.init:()V
         4: .line 57
            return
        end local 1 // io.netty.channel.ChannelPipeline pipeline
        end local 0 // io.vertx.pgclient.impl.PgSocketConnection this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    5     0      this  Lio/vertx/pgclient/impl/PgSocketConnection;
            2    5     1  pipeline  Lio/netty/channel/ChannelPipeline;

  public void sendStartupMessage(java.lang.String, java.lang.String, java.lang.String, java.util.Map<java.lang.String, java.lang.String>, io.vertx.core.Handler<? super io.vertx.sqlclient.impl.command.CommandResponse<io.vertx.sqlclient.impl.Connection>>);
    descriptor: (Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/util/Map;Lio/vertx/core/Handler;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=7, locals=7, args_size=6
        start local 0 // io.vertx.pgclient.impl.PgSocketConnection 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 // java.util.Map properties
        start local 5 // io.vertx.core.Handler completionHandler
         0: .line 60
            new io.vertx.sqlclient.impl.command.InitCommand
            dup
            aload 0 /* this */
            aload 1 /* username */
            aload 2 /* password */
            aload 3 /* database */
            aload 4 /* properties */
            invokespecial io.vertx.sqlclient.impl.command.InitCommand.<init>:(Lio/vertx/sqlclient/impl/SocketConnectionBase;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/util/Map;)V
            astore 6 /* cmd */
        start local 6 // io.vertx.sqlclient.impl.command.InitCommand cmd
         1: .line 61
            aload 6 /* cmd */
            aload 5 /* completionHandler */
            putfield io.vertx.sqlclient.impl.command.InitCommand.handler:Lio/vertx/core/Handler;
         2: .line 62
            aload 0 /* this */
            aload 6 /* cmd */
            invokevirtual io.vertx.pgclient.impl.PgSocketConnection.schedule:(Lio/vertx/sqlclient/impl/command/CommandBase;)V
         3: .line 63
            return
        end local 6 // io.vertx.sqlclient.impl.command.InitCommand cmd
        end local 5 // io.vertx.core.Handler completionHandler
        end local 4 // java.util.Map properties
        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.pgclient.impl.PgSocketConnection this
      LocalVariableTable:
        Start  End  Slot               Name  Signature
            0    4     0               this  Lio/vertx/pgclient/impl/PgSocketConnection;
            0    4     1           username  Ljava/lang/String;
            0    4     2           password  Ljava/lang/String;
            0    4     3           database  Ljava/lang/String;
            0    4     4         properties  Ljava/util/Map<Ljava/lang/String;Ljava/lang/String;>;
            0    4     5  completionHandler  Lio/vertx/core/Handler<-Lio/vertx/sqlclient/impl/command/CommandResponse<Lio/vertx/sqlclient/impl/Connection;>;>;
            1    4     6                cmd  Lio/vertx/sqlclient/impl/command/InitCommand;
    Signature: (Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/util/Map<Ljava/lang/String;Ljava/lang/String;>;Lio/vertx/core/Handler<-Lio/vertx/sqlclient/impl/command/CommandResponse<Lio/vertx/sqlclient/impl/Connection;>;>;)V
    MethodParameters:
                   Name  Flags
      username           
      password           
      database           
      properties         
      completionHandler  

  void sendCancelRequestMessage(int, int, io.vertx.core.Handler<io.vertx.core.AsyncResult<java.lang.Void>>);
    descriptor: (IILio/vertx/core/Handler;)V
    flags: (0x0000) 
    Code:
      stack=4, locals=5, args_size=4
        start local 0 // io.vertx.pgclient.impl.PgSocketConnection this
        start local 1 // int processId
        start local 2 // int secretKey
        start local 3 // io.vertx.core.Handler handler
         0: .line 66
            bipush 16
            invokestatic io.vertx.core.buffer.Buffer.buffer:(I)Lio/vertx/core/buffer/Buffer;
            astore 4 /* buffer */
        start local 4 // io.vertx.core.buffer.Buffer buffer
         1: .line 67
            aload 4 /* buffer */
            bipush 16
            invokeinterface io.vertx.core.buffer.Buffer.appendInt:(I)Lio/vertx/core/buffer/Buffer;
            pop
         2: .line 69
            aload 4 /* buffer */
            ldc 80877102
            invokeinterface io.vertx.core.buffer.Buffer.appendInt:(I)Lio/vertx/core/buffer/Buffer;
            pop
         3: .line 70
            aload 4 /* buffer */
            iload 1 /* processId */
            invokeinterface io.vertx.core.buffer.Buffer.appendInt:(I)Lio/vertx/core/buffer/Buffer;
            pop
         4: .line 71
            aload 4 /* buffer */
            iload 2 /* secretKey */
            invokeinterface io.vertx.core.buffer.Buffer.appendInt:(I)Lio/vertx/core/buffer/Buffer;
            pop
         5: .line 73
            aload 0 /* this */
            getfield io.vertx.pgclient.impl.PgSocketConnection.socket:Lio/vertx/core/impl/NetSocketInternal;
            aload 4 /* buffer */
            aload 0 /* this */
            aload 3 /* handler */
            invokedynamic handle(Lio/vertx/pgclient/impl/PgSocketConnection;Lio/vertx/core/Handler;)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/pgclient/impl/PgSocketConnection.lambda$0(Lio/vertx/core/Handler;Lio/vertx/core/AsyncResult;)V (7)
                  (Lio/vertx/core/AsyncResult;)V
            invokeinterface io.vertx.core.impl.NetSocketInternal.write:(Lio/vertx/core/buffer/Buffer;Lio/vertx/core/Handler;)Lio/vertx/core/net/NetSocket;
            pop
         6: .line 85
            return
        end local 4 // io.vertx.core.buffer.Buffer buffer
        end local 3 // io.vertx.core.Handler handler
        end local 2 // int secretKey
        end local 1 // int processId
        end local 0 // io.vertx.pgclient.impl.PgSocketConnection this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    7     0       this  Lio/vertx/pgclient/impl/PgSocketConnection;
            0    7     1  processId  I
            0    7     2  secretKey  I
            0    7     3    handler  Lio/vertx/core/Handler<Lio/vertx/core/AsyncResult<Ljava/lang/Void;>;>;
            1    7     4     buffer  Lio/vertx/core/buffer/Buffer;
    Signature: (IILio/vertx/core/Handler<Lio/vertx/core/AsyncResult<Ljava/lang/Void;>;>;)V
    MethodParameters:
           Name  Flags
      processId  
      secretKey  
      handler    

  public int getProcessId();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.vertx.pgclient.impl.PgSocketConnection this
         0: .line 89
            aload 0 /* this */
            getfield io.vertx.pgclient.impl.PgSocketConnection.processId:I
            ireturn
        end local 0 // io.vertx.pgclient.impl.PgSocketConnection this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/vertx/pgclient/impl/PgSocketConnection;

  public int getSecretKey();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.vertx.pgclient.impl.PgSocketConnection this
         0: .line 94
            aload 0 /* this */
            getfield io.vertx.pgclient.impl.PgSocketConnection.secretKey:I
            ireturn
        end local 0 // io.vertx.pgclient.impl.PgSocketConnection this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/vertx/pgclient/impl/PgSocketConnection;

  void upgradeToSSLConnection(io.vertx.core.Handler<io.vertx.core.AsyncResult<java.lang.Void>>);
    descriptor: (Lio/vertx/core/Handler;)V
    flags: (0x0000) 
    Code:
      stack=7, locals=4, args_size=2
        start local 0 // io.vertx.pgclient.impl.PgSocketConnection this
        start local 1 // io.vertx.core.Handler completionHandler
         0: .line 98
            aload 0 /* this */
            getfield io.vertx.pgclient.impl.PgSocketConnection.socket:Lio/vertx/core/impl/NetSocketInternal;
            invokeinterface io.vertx.core.impl.NetSocketInternal.channelHandlerContext:()Lio/netty/channel/ChannelHandlerContext;
            invokeinterface io.netty.channel.ChannelHandlerContext.pipeline:()Lio/netty/channel/ChannelPipeline;
            astore 2 /* pipeline */
        start local 2 // io.netty.channel.ChannelPipeline pipeline
         1: .line 99
            invokestatic io.vertx.core.Promise.promise:()Lio/vertx/core/Promise;
            astore 3 /* upgradePromise */
        start local 3 // io.vertx.core.Promise upgradePromise
         2: .line 100
            aload 3 /* upgradePromise */
            invokeinterface io.vertx.core.Promise.future:()Lio/vertx/core/Future;
            aload 1 /* completionHandler */
            invokedynamic handle(Lio/vertx/core/Handler;)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/pgclient/impl/PgSocketConnection.lambda$1(Lio/vertx/core/Handler;Lio/vertx/core/AsyncResult;)V (6)
                  (Lio/vertx/core/AsyncResult;)V
            invokeinterface io.vertx.core.Future.setHandler:(Lio/vertx/core/Handler;)Lio/vertx/core/Future;
            pop
         3: .line 112
            aload 2 /* pipeline */
            ldc "handler"
            ldc "initiate-ssl-handler"
            new io.vertx.pgclient.impl.InitiateSslHandler
            dup
            aload 0 /* this */
            aload 3 /* upgradePromise */
            invokespecial io.vertx.pgclient.impl.InitiateSslHandler.<init>:(Lio/vertx/sqlclient/impl/SocketConnectionBase;Lio/vertx/core/Promise;)V
            invokeinterface io.netty.channel.ChannelPipeline.addBefore:(Ljava/lang/String;Ljava/lang/String;Lio/netty/channel/ChannelHandler;)Lio/netty/channel/ChannelPipeline;
            pop
         4: .line 113
            return
        end local 3 // io.vertx.core.Promise upgradePromise
        end local 2 // io.netty.channel.ChannelPipeline pipeline
        end local 1 // io.vertx.core.Handler completionHandler
        end local 0 // io.vertx.pgclient.impl.PgSocketConnection this
      LocalVariableTable:
        Start  End  Slot               Name  Signature
            0    5     0               this  Lio/vertx/pgclient/impl/PgSocketConnection;
            0    5     1  completionHandler  Lio/vertx/core/Handler<Lio/vertx/core/AsyncResult<Ljava/lang/Void;>;>;
            1    5     2           pipeline  Lio/netty/channel/ChannelPipeline;
            2    5     3     upgradePromise  Lio/vertx/core/Promise<Ljava/lang/Void;>;
    Signature: (Lio/vertx/core/Handler<Lio/vertx/core/AsyncResult<Ljava/lang/Void;>;>;)V
    MethodParameters:
                   Name  Flags
      completionHandler  

  private void lambda$0(io.vertx.core.Handler, io.vertx.core.AsyncResult);
    descriptor: (Lio/vertx/core/Handler;Lio/vertx/core/AsyncResult;)V
    flags: (0x1002) ACC_PRIVATE, ACC_SYNTHETIC
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // io.vertx.pgclient.impl.PgSocketConnection this
        start local 2 // io.vertx.core.AsyncResult ar
         0: .line 74
            aload 2 /* ar */
            invokeinterface io.vertx.core.AsyncResult.succeeded:()Z
            ifeq 6
         1: .line 76
            aload 0 /* this */
            getfield io.vertx.pgclient.impl.PgSocketConnection.status:Lio/vertx/sqlclient/impl/SocketConnectionBase$Status;
            getstatic io.vertx.sqlclient.impl.SocketConnectionBase$Status.CONNECTED:Lio/vertx/sqlclient/impl/SocketConnectionBase$Status;
            if_acmpne 4
         2: .line 77
            aload 0 /* this */
            getstatic io.vertx.sqlclient.impl.SocketConnectionBase$Status.CLOSING:Lio/vertx/sqlclient/impl/SocketConnectionBase$Status;
            putfield io.vertx.pgclient.impl.PgSocketConnection.status:Lio/vertx/sqlclient/impl/SocketConnectionBase$Status;
         3: .line 78
            aload 0 /* this */
            getfield io.vertx.pgclient.impl.PgSocketConnection.socket:Lio/vertx/core/impl/NetSocketInternal;
            invokeinterface io.vertx.core.impl.NetSocketInternal.close:()V
         4: .line 80
      StackMap locals:
      StackMap stack:
            aload 1
            invokestatic io.vertx.core.Future.succeededFuture:()Lio/vertx/core/Future;
            invokeinterface io.vertx.core.Handler.handle:(Ljava/lang/Object;)V
         5: .line 81
            goto 7
         6: .line 82
      StackMap locals:
      StackMap stack:
            aload 1
            aload 2 /* ar */
            invokeinterface io.vertx.core.AsyncResult.cause:()Ljava/lang/Throwable;
            invokestatic io.vertx.core.Future.failedFuture:(Ljava/lang/Throwable;)Lio/vertx/core/Future;
            invokeinterface io.vertx.core.Handler.handle:(Ljava/lang/Object;)V
         7: .line 84
      StackMap locals:
      StackMap stack:
            return
        end local 2 // io.vertx.core.AsyncResult ar
        end local 0 // io.vertx.pgclient.impl.PgSocketConnection this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    8     0  this  Lio/vertx/pgclient/impl/PgSocketConnection;
            0    8     2    ar  Lio/vertx/core/AsyncResult<Ljava/lang/Void;>;

  private static void lambda$1(io.vertx.core.Handler, io.vertx.core.AsyncResult);
    descriptor: (Lio/vertx/core/Handler;Lio/vertx/core/AsyncResult;)V
    flags: (0x100a) ACC_PRIVATE, ACC_STATIC, ACC_SYNTHETIC
    Code:
      stack=2, locals=4, args_size=2
        start local 1 // io.vertx.core.AsyncResult ar
         0: .line 101
            aload 1 /* ar */
            invokeinterface io.vertx.core.AsyncResult.succeeded:()Z
            ifeq 3
         1: .line 102
            aload 0
            invokestatic io.vertx.core.Future.succeededFuture:()Lio/vertx/core/Future;
            invokeinterface io.vertx.core.Handler.handle:(Ljava/lang/Object;)V
         2: .line 103
            goto 8
         3: .line 104
      StackMap locals:
      StackMap stack:
            aload 1 /* ar */
            invokeinterface io.vertx.core.AsyncResult.cause:()Ljava/lang/Throwable;
            astore 2 /* cause */
        start local 2 // java.lang.Throwable cause
         4: .line 105
            aload 2 /* cause */
            instanceof io.netty.handler.codec.DecoderException
            ifeq 7
         5: .line 106
            aload 2 /* cause */
            checkcast io.netty.handler.codec.DecoderException
            astore 3 /* err */
        start local 3 // io.netty.handler.codec.DecoderException err
         6: .line 107
            aload 3 /* err */
            invokevirtual io.netty.handler.codec.DecoderException.getCause:()Ljava/lang/Throwable;
            astore 2 /* cause */
        end local 3 // io.netty.handler.codec.DecoderException err
         7: .line 109
      StackMap locals: java.lang.Throwable
      StackMap stack:
            aload 0
            aload 2 /* cause */
            invokestatic io.vertx.core.Future.failedFuture:(Ljava/lang/Throwable;)Lio/vertx/core/Future;
            invokeinterface io.vertx.core.Handler.handle:(Ljava/lang/Object;)V
        end local 2 // java.lang.Throwable cause
         8: .line 111
      StackMap locals:
      StackMap stack:
            return
        end local 1 // io.vertx.core.AsyncResult ar
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    9     1     ar  Lio/vertx/core/AsyncResult<Ljava/lang/Void;>;
            4    8     2  cause  Ljava/lang/Throwable;
            6    7     3    err  Lio/netty/handler/codec/DecoderException;
}
SourceFile: "PgSocketConnection.java"
InnerClasses:
  public final Status = io.vertx.sqlclient.impl.SocketConnectionBase$Status of io.vertx.sqlclient.impl.SocketConnectionBase
  public final Lookup = java.lang.invoke.MethodHandles$Lookup of java.lang.invoke.MethodHandles