Technote: Limitations of NotesHTTPRequest and NotesJSONNavigator with future considerations

If you are already using the NotesHTTPRequest and / or NotesJSONNavigator classes in your code and you are experiencing one of the following issues, here is an important technote for you.

  • SPR# DCONB8VMAV – NotesJSONNavigator is unable to parse JSON content > 64k
  • SPR# ASHEB95LFR – Unable to parse JSON string: Missing a name for object member, offset 1
  • SPR# DCONB8F6JV – bad character conversion happening in NotesHTTPRequest response
  • SPR# ASHEB95LFR – NotesJSONNavigator unable to navigate a string which contains new lines and carriage returns
  • SPR# DCONBB2KNR – NotesJSONNavigator experiencing severe issues when parsing packages with empty string values
  • SPR# JCORBB2KWU – Unable to Post > 64K String in NotesHTTPRequest
  • SPR# DCONBB44T4 – Creating a NotesJSONNavigator from nulled response causes crash

Programmatically Update /Add Database to DQL Design Catalog

For high speed access to internal information about views and view columns, DQL processing uses design data extracted from view notes. Currently this information will be stored in a new database, named

It is created using new updall flags. It does not replicate and is solely used as a fast-path tool to access design data at runtime.

Here is some LotusScript code to add / update the design of a named Notes application to the catalog. The NSFDesignHarvest call is currently undocumented. Use it at your own risk.



Const NNOTES ="nnotes.dll"
Const LIBNOTES =""

Declare Public Function WIN_NSFDbOpen Lib NNOTES Alias "NSFDbOpen" _
(ByVal dbName As String, hDb As Long) As Integer
Declare Public Function LIN_NSFDbOpen Lib LIBNOTES Alias "NSFDbOpen" _
(ByVal dbName As String, hDb As Long) As Integer
Declare Public Function WIN_NSFDbClose Lib NNOTES Alias "NSFDbClose" _
(ByVal hDb  As Long) As Integer
Declare Public Function LIN_NSFDbClose Lib LIBNOTES Alias "NSFDbClose" _
(ByVal hDb  As Long) As Integer
Declare Public Function WIN_NSFDesignHarvest Lib NNOTES Alias "NSFDesignHarvest" _
(ByVal hDb  As Long, ByVal flag  As Long) As Integer
Declare Public Function LIN_NSFDesignHarvest Lib LIBNOTES Alias "NSFDesignHarvest" _
(ByVal hDb  As Long, ByVal flag  As Long) As Integer

Private Function NSFDbOpen( db As String, hDB As Long) As Integer
	If isDefined("WINDOWS") Then
		NSFDbOpen = WIN_NSFDbOpen(db,hDb)
	ElseIf isDefined("LINUX") Then
		NSFDbOpen = LIN_NSFDbOpen(db,hDb)
	End If
End Function

Private Function NSFDbClose (hDb As Long)
	If isDefined("WINDOWS") Then
		NSFDbClose = WIN_NSFDbClose(hDb)
	ElseIf isDefined("LINUX") Then
		NSFDbClose = LIN_NSFDbClose(hDb)
	End If
End Function

Private Function NSFDesignHarvest (hDb As Long, flag As long) As Integer
	If isDefined("WINDOWS") Then
		NSFDesignHarvest = WIN_NSFDesignHarvest(hDb, flag)
	ElseIf isDefined("LINUX") Then
		NSFDesignHarvest = LIN_NSFDesignHarvest(hDb, flag)
	End If
End Function

Public Function catalogDesign(sDb As String, flag As Long) As Integer
	Dim hDb As Long
	Dim rc As Integer
	If flag > 1 Then flag = 1
	If flag < 0 Then flag = 0
	rc = NSFDbOpen(sDb, hDb)
	If rc = 0 Then
		rc = NSFDesignHarvest(hDb, flag)
		rc = NSFDbClose(hDb)
	End If
	catalogDesign = rc 
End Function

Get Linux Version Information

To get some basic information about the installed Linux version you can use uname -a.

This will give you something like

Linux 3.10.0-957.1.3.el7.x86_64 #1 SMP 
Thu Nov 29 14:49:43 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Well, we get the kernel version and the architecture.

rpm -qia ‘release gives much more information

Name        : nodesource-release
Version     : el7
Release     : 1
Architecture: noarch
Install Date: Thu 29 Nov 2018 09:01:53 AM CET
Group       : System Environment/Base
Size        : 3191
License     : MIT
Signature   : RSA/SHA256, Thu 04 Jan 2018 09:42:19 PM CET, Key ID 5ddbe8d434fa74dd
Source RPM  : nodesource-release-el7-1.src.rpm
Build Date  : Thu 04 Jan 2018 09:40:35 PM CET
Build Host  : luthien
Relocations : (not relocatable)
URL         :
Summary     : N|Solid repository configuration
Description :
This package contains the NodeSource NodeJS repository
GPG key as well as configuration for yum.
Name        : redhat-release-server
Version     : 7.4
Release     : 18.el7
Architecture: x86_64
Install Date: Tue 27 Nov 2018 01:50:07 PM CET
Group       : System Environment/Base
Size        : 43146
License     : GPLv2
Signature   : RSA/SHA256, Wed 28 Jun 2017 08:59:19 PM CEST, Key ID 199e2f91fd431d51
Source RPM  : redhat-release-server-7.4-18.el7.src.rpm
Build Date  : Wed 28 Jun 2017 08:36:32 PM CEST
Build Host  :
Relocations : (not relocatable)
Packager    : Red Hat, Inc. <>
Vendor      : Red Hat, Inc.
Summary     : Red Hat Enterprise Linux Server release file
Description :
Red Hat Enterprise Linux Server release files
Name        : epel-release
Version     : 7
Release     : 11
Architecture: noarch
Install Date: Wed 28 Nov 2018 07:54:48 AM CET
Group       : System Environment/Base
Size        : 24834
License     : GPLv2
Signature   : RSA/SHA256, Mon 02 Oct 2017 07:52:02 PM CEST, Key ID 6a2faea2352c64e5
Source RPM  : epel-release-7-11.src.rpm
Build Date  : Mon 02 Oct 2017 07:45:58 PM CEST
Build Host  :
Relocations : (not relocatable)
Packager    : Fedora Project
Vendor      : Fedora Project
URL         :
Summary     : Extra Packages for Enterprise Linux repository configuration
Description :
This package contains the Extra Packages for Enterprise Linux (EPEL) repository
GPG key as well as configuration for yum.

Enable/Disable/Sign agents without opening DDE

A couple of days ago, Thomas Adrian posted a new idea on Allow Enable/Disable/Sign agents from Domino Administrator without opening DDE.

This is a pretty cool idea, I think. Although there already is a great tool available from Ytria ( agentEZ ), handling of agents should be a part of the core features of Notes / Domino.

Notes / Domino contains some of the requested features and for example, you can enable an agent via adminp. You can simply create a new admin request in the admin4.nsf; if you know, which values to set. Unfortunately, this is not documented and you have to do a lot of try and error before the admin request is processed. The advantage of using adminp would be documentation of who did what.
As a downside, you cannot disable an agent; there is no adminp request for that.

Back in 2007, I already demonstrated, how you can add your own adminp requests to the adminp Delete Group Members Using The Administration Process

After reading Thomas’ idea, I decided to spend some hours on building a Domino server addin that would enable / disable or toggle the status of scheduled agents in an application. The application path, agent name and what to do should be passed as parameters to the addin.

Project “AMgr2” was born.

Over the years, I have created my own Notes cAPI CPP framework. This is still work in progress, as I add new methods and properties when I need them.

The framework is a great help when it comes to RAD in Notes / Domino using c/c++. I tried to name methods and properties as close as possible to what we have in LotusScript or Java to make the resulting source code readable and maintainable. Here is an example how I determine if an agent is of type “scheduled” within my framework

bool cNotesAgent::isScheduled() {
		cNotesDocument doc(db_h, agnt_id, OPEN_NOVERIFYDEFAULT);
		cNotesItemText trigger = doc.getItemText("$AssistTrigger");
		if(!"1")) {return TRUE;} else {return FALSE;} 

Most of the magic happens in the framework, so the source code for AMgr2 is pretty short.

// main.h

#ifndef _MAIN_H_
#define _MAIN_H_

#include <string>

#if defined (_MSC_VER) && !defined(ND64)
#pragma pack(push, 1)
#include <global.h>
#include <miscerr.h>
#include <addin.h>
#if defined (_MSC_VER) && !defined (ND64)
#pragma pack(pop)

#include "cNotesFramework.h"
#include "cNotesAgent.h"
#include "cmdline.h"

#if defined (W64)

#define APP_NAME	"AMgr2: "
#undef MSG
#define MSG(fmt) APP_NAME fmt
#define ERROR -1
using namespace std;


// main.cpp

* Amgr2
* eknori at eknori dot de FEBRUARY 2019
* copyright (c) 2019 Ulrich Krause

#pragma warning(disable:4005) 

#include "main.h"

STATUS LNPUBLIC AddInMain (HMODULE hModule, int argc, char *argv[]) {

	STATUS				error = NOERROR;
	HANDLE				hStatusLine;
	HANDLE				hStatusLineDesc;
	HMODULE				hMod;

	AddInQueryDefaults (&hMod, &hStatusLine);
	AddInDeleteStatusLine (hStatusLine);
	hStatusLineDesc = AddInCreateStatusLine(ADDIN_STATUS_LINE);
	AddInSetDefaults (hMod, hStatusLineDesc);

	CmdLine *cmdline = new CmdLine();

	cmdline->addUsage("  amgr2, V1.0.0.0, (c) 2019, Ulrich Krause\n");
	cmdline->addUsage("Usage: lo amgr2 [options] [flags]\n");

	cmdline->addUsage( "Options:\n" );
	cmdline->addUsage( "-d    --db\t\tdatabase path" );
	cmdline->addUsage( "-a    --agent\t\tagent name" );

	cmdline->addUsage( "" );
	cmdline->addUsage( "Flags:\n" );
	cmdline->addUsage( "-h    --help\t\tPrints this help" );
	cmdline->addUsage( "      --enable\tEnable agent" );
	cmdline->addUsage( "      --disable\tDisable agent" );
	cmdline->addUsage( "      --toggle\tToggle agent status" );

	cmdline->setOption( "db", 'd' );
	cmdline->setOption( "agent", 'a' );

	cmdline->setFlag ( "help", 'h' ); 
	cmdline->setFlag ( "enable");
	cmdline->setFlag ( "disable");
	cmdline->setFlag ( "toggle");

	cmdline->processCommandArgs( argc, argv );

	if( ! cmdline->hasOptions()) {
		delete cmdline;
		return ERROR;

	if( cmdline->getFlag( "help" ) 
		|| cmdline->getFlag( 'h' ) ) {
			return NOERROR;

	string file_path;
	if( cmdline->getValue( 'd' ) != NULL  
		|| cmdline->getValue( "db" ) != NULL  ){
			file_path = cmdline->getValue( 'd' );

	string agent_name;
	if( cmdline->getValue( 'a' ) != NULL  
		|| cmdline->getValue( "agent" ) != NULL  ){
			agent_name = cmdline->getValue( 'a' );

	cNotesDatabase _NotesDatabase;


		cNotesAgent _NotesAgent(
			_NotesDatabase.h, agent_name.c_str());

		if(_NotesAgent.isScheduled()) {

			if( cmdline->getFlag( "enable" )) {

					MSG("... agent '%s' in database '%s' has been enabled\n"), 

			if( cmdline->getFlag( "disable" )) {

					MSG("... agent '%s' in database '%s' has been disabled\n"), 

			if( cmdline->getFlag( "toggle" )) {
				if(_NotesAgent.isEnabled()) {

						MSG("... agent '%s' in database '%s' has been disabled\n"), 
				else {

						MSG("... agent '%s' in database '%s' has been enabled\n"), 

			} else { // is_scheduled

					MSG("... agent '%s' in database '%s' is not a scheduled agent\n"), 


		} catch (cNotesErr& err) {
			delete cmdline;

				MSG("Notes Error: %s\n"), 
				NOERROR, err.what());
			return ERROR;

		} catch (...) {
			delete cmdline;

			AddInLogMessageText("Unexpected Error\n", NOERROR);
			return ERROR;

		delete cmdline;
		return error;

To build the cmdline parser, I use another framework that I wrote a couple of years ago. I used the Boost.Program_options in a couple of other projects before, but it is a lot of overhead for such a small project like AMgr2.
CmdLine is much smaller. Despite of its simplicity, it is reliable and produces nice help screens.

I have not yet published CmdLine on Github. If you are interested in the source code, send me an email and I will send you the sources.

Putting it all together, we get a 64bit binary amgr2.exe Copy it to your Domino program directory and you are ready to go.

Open the Domino server console and type

lo amgr2 -h  and you should get

  amgr2, V1.0.0.0, (c) 2019, Ulrich Krause

  Usage: lo amgr2 [options] [flags]


  -d    --db		database path
  -a    --agent		agent name

  -h    --help		Prints this help
        --enable	Enable agent
        --disable	Disable agent
        --toggle	Toggle agent status

To enable a scheduled agent in an application type

lo amgr2 -d names.nsf -a test --enable

[219C:0002-1CE8] 17.02.2019 08:39:56   AMgr2: ... agent 'test' in database 'names.nsf' has been enabled 

Use –disable to disable an agent or –toggle to change the status of an agent accordingly.

AMgr2 only works for scheduled agents. If an agent does not match this criteria, you’ll get the following message on the server console

lo amgr2 -d names.nsf -a test2 --toggle

[1F94:0002-15D8] 17.02.2019 08:47:53   AMgr2: ... agent 'test2' in database 'names.nsf' is not a scheduled agent

You also can build a simple Notes application that scans all applications on a server for scheduled agents.
Next you can use NotesSession.SendConsoleCommand to enable / disable / toggle one or more agents.

Here is some sample code

Sub Click(Source As Button)
	Dim session As New NotesSession
	serverName$ = "serv01/singultus"
	consoleCommand$ = Inputbox$("Type command:", _
	"Send console command")
	consoleReturn$ = session.SendConsoleCommand( _
	serverName$, consoleCommand$)
	Messagebox consoleReturn$,, consoleCommand$
End Sub

This might not be what Thomas asked for, but it is a good starting point. There is a lot room for improvements and enhancements. AMgr2 will sign the agent with the server id. This might not always be intended. It is not rocket science to implement code and add a couple of parameters to the cmdline parse to use a different id for signing. It is more work to make sure, this id is stored in a secure place and cnnot be accessed by any unauthorized person.

For now, this is it.

AMgr2 once again proves that you can do everything with Notes / Domino. The creators gave us tools that let us add functionallity that is not in the core code. OK, I admit that c/c++ is not the preferred programming language for most of the Notes / Domino developers.

SyntaxHighlighter Evolved: @Formula Brush

Submitted another plugin to the WordPress plugin directory.

The plugin adds a new brush to the SyntaxHighlighter Evolved plugin to colorize @formula code.


_fld:=@Trim(@ReplaceSubstring(@DocFields; _exclude; @Nothing));
+ @Implode ( @Transform (
_fld; "_fn" ; "\"" + _fn + "\":\"" + 
@Text ( @GetField ( _fn) ) + "\"" ) ; "," ) +

java.lang.UnsatisfiedLinkError: lotus/domino/local/Database.NcreateDQuery()J

UPDATE 05-FEB-2019: Issue is being tracked under SPR # VRARB94KAQ

When executing db.createDominoQuery(); in a Java agent on the server, I see the following error message on the Domino console:

te amgr run "ec11.nsf" ''
[021963:000035-00007F2BE8DFD700] 02/03/2019 05:41:29 AM AMgr: Start executing agent '' in 'ec11.nsf'
[021963:000037-00007F2BE816F700] 02/03/2019 05:41:29 AM Agent Manager: Agent printing: Version: Release 10.0.1 November 29, 2018
[021963:000037-00007F2BE816F700] 02/03/2019 05:41:29 AM Agent Manager: Agent printing: Db Title: singultus's Directory
[021963:000038-00007F2BE816F700] 02/03/2019 05:41:29 AM Agent Manager: Agent error: Exception in thread "AgentThread: JavaAgent"
[021963:000039-00007F2BE816F700] 02/03/2019 05:41:29 AM Agent Manager: Agent error: java.lang.UnsatisfiedLinkError: lotus/domino/local/Database.NcreateDQuery()J
[021963:000041-00007F2BE816F700] 02/03/2019 05:41:29 AM Agent Manager: Agent error: at lotus.domino.local.Database.createDominoQuery(Unknown Source)
[021963:000043-00007F2BE816F700] 02/03/2019 05:41:29 AM Agent Manager: Agent error: at JavaAgent.NotesMain(
[021963:000045-00007F2BE816F700] 02/03/2019 05:41:29 AM Agent Manager: Agent error: at lotus.domino.AgentBase.runNotes(Unknown Source)
[021963:000047-00007F2BE816F700] 02/03/2019 05:41:29 AM Agent Manager: Agent error: at Source)
[021963:000035-00007F2BE8DFD700] 02/03/2019 05:41:29 AM AMgr: Agent '' in 'ec11.nsf' completed execution

According to John Curtis (HCL) “… We haven’t seen this to date.”.

I have tested on different OS.

Red Hat Enterprise Linux Server release 7.4 (Maipo)
Linux 3.10.0-693.el7.x86_64 #1 SMP Thu Jul 6 19:56:57 EDT 2017 x86_64 x86_64 x86_64 GNU/Linux
IBM Domino (r) Server (64 Bit) (Release 10.0.1 for Linux/64) 02/03/2019 05:48:40 AM
serv02 has been upgraded from V10.0
CentOS Linux release 7.6.1810 (Core)
Linux 3.10.0-957.1.3.el7.x86_64 #1 SMP Thu Nov 29 14:49:43 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
IBM Domino (r) Server (64 Bit) (Release 10.0.1 for Linux/64) 02/03/2019 05:49:15 AM (Community server)
serv03 is "fresh" install and not upgraded from earlier Domino versions.

Here is the code I used

import lotus.domino.AgentBase;
import lotus.domino.Database;
import lotus.domino.DominoQuery;
import lotus.domino.Session;

public class JavaAgent extends AgentBase {

	public void NotesMain() {

		try {
			Session session = getSession();
			System.out.println("Version: " + session.getNotesVersion());
			Database db = null;
			db = session.getDatabase(null, "names.nsf");
			System.out.println("Db Title: " + db.getTitle());
			DominoQuery dql = null;
			dql = db.createDominoQuery();

		} catch (Exception e) {

As it works on Domino 10.0.1 on WINDOWS, I investigated nlsxbe.dll and

nlsxbe.dll contains the function in question

Java_lotus_domino_local_Database_NcreateDQuery 0x0000000180017cd0 0x00017cd0 732 (0x2dc) nlsxbe.dll W:\Domino\nlsxbe.dll Exported Function is missing the function. At least, it is not exported.

nm -D | grep createD

0000000000096a03 T Java_lotus_domino_local_Database_NcreateDocColl
0000000000095587 T Java_lotus_domino_local_Database_NcreateDocument
000000000012bf7d T Java_lotus_domino_local_DateRange_NrecreateDateRange
00000000000e33e1 T Java_lotus_domino_local_DateTime_NrecreateDateTime
0000000000110ad2 T Java_lotus_domino_local_DbDirectory_NcreateDatabase
00000000000d5d6d T Java_lotus_domino_local_Session_NcreateDateRange
00000000000da091 T Java_lotus_domino_local_Session_NcreateDateTime
00000000000d6bd1 T Java_lotus_domino_local_Session_NcreateDxlExporter
00000000000d6d71 T Java_lotus_domino_local_Session_NcreateDxlImporter
00000000000957a0 T Java_lotus_notes_Database_NcreateDocument
0000000000110d7e T Java_lotus_notes_DbDirectory_NcreateDatabase
00000000000d5f40 T Java_lotus_notes_Session_NcreateDateRange
00000000000da360 T Java_lotus_notes_Session_NcreateDateTime
U _ZN11XmlDocument14createDocumentEv
U _ZN11XmlDocument22cr

The version and date seem to be OK.

ls -al
-rwxr-xr-x. 1 root root 14510400 Nov 29 07:48

Perhaps someone else can confirm this behaviour. I have already created case #TS001863705 with HCL.

SyntaxHighlighter Evolved: LotusScript Brush

SyntaxHighlighter Evolved: LotusScript Brush is a small WordPress plugin that adds support for the LotusScript language to the great SyntaxHighlighter Evolved plugin by Alex Mills.

I have submitted a request to add the plugin to the official WordPress plugin directory. The review process will take some time.

In the meantime, you can start using SyntaxHighlighter Evolved: LotusScript Brush right now.

Download the plugin from here , unpack it and upload to your /wp-content/plugins directory.

Update 04-FEB-2019: The plugin is now available in the WordPress plugin directory.

Next activate the plugin

SyntaxHighlighter Evolved: LotusScript Brush will now be available as a new language in the Block Editor (“Code Languages”)

SyntaxHighlighter Evolved: LotusScript Brush highlights classes, method and properties, keywords, strings, comments and directives.

NotesDominoQuery – Find the needle in the haystack (LS)

Think about a big database with lots of documents in it and you want to find only one particular document. You can do that with FTSearch, or you can use a with some formula.

As of V10.0.x, you also have DQL and the new NotesDominoQuery class.
The class is available in Lotsscript and Java.
I want to demonstrate in this sample, how you can find the needle in the haystack with DQL in Lotusscript.

My database has about 12.500.000 Documents. It is one of our customers database at midpoints. The amount of documents was created by accident. Some call it a bug. Anyway, the database is a good playground.

The code is typical for a LS developer. It initiates objects and stuff, assigns variables like our dqlTerm (line 6 see the similarity to the @formula, you would probably use with ), does a check, if the target database is open (line 9 ) and also has some basic error handling (17, 20-21). We will come to that later.

I am running the sample on the client. As of today , you cannot run a query client / server. I will show in another post, how you can run the query on the server and work with the results on the client. But that is another story.

public Sub foo() 
	Dim session As New NotesSession
	Dim db As NotesDatabase
	Dim col As NotesDocumentCollection
	Dim dqlTerm As String
	dqlTerm = "form = 'frm.rules.device.rule' And rule_unid = '99A242AAB69B5BB9C1257FFC005DE6C4'"
	Set db = session.Getdatabase("","trul-big.nsf", False)
	If db.Isopen Then
		Set dql = db.CreateDominoQuery()
		Dim parse_result As String
		parse_result = dql.parse(dqlTerm)

		If LCase(parse_result) = "success" Then
			Set col = dql.Execute(dqlTerm)
			MsgBox dql.Explain(dqlTerm)
			MsgBox parse_result
		End If
	End If
End Sub

Before you run the code and try to search such a huge amount of data, you need to set some notes.ini variables.


By now, there is no other way to increase the number of documents. There are setters in the NotesDominoQuery class, but those setters are broken. This is a known issue and HCL is working on a solution.

When we now run the code, we will get the following result

It took 51.3 secs to find 110642 documents that use the form “frm.rules.device.rule” and zero to none secs to find 1 document in that resultset.

Would it be faster or slower, if we modify our query to use only the rule_unid field and search over the entire set of documents?

dqlTerm = "rule_unid = '99A242AAB69B5BB9C1257FFC005DE6C4'"

Here is the result

32.2 secs to find the needle in the haystack. Use this kind of single field search, if you are sure that the field “rule_unid” is only used on one form.

But even in the case that the field is used on another form; to filter the resulting NotesDocument collection afterwards is much faster than the AND dqlTerm from the original code.

Maybe, you already have a view in your application where the rule_unid is in a sorted column.

Then we can use a modified dqlTerm to find the document in that view.

Again, let’s change our dqlTerm a little bit

dqlTerm = "'all'.rule_unid = '99A242AAB69B5BB9C1257FFC005DE6C4'"

And here is the result

THAT is pretty cool, isn’t it? 5.6 msecs to find the needle in the haystack.

Can it be even faster? I think no, but let us take another look at the code that does the query.

        Dim parse_result As String
        parse_result = dql.parse(dqlTerm)
        If LCase(parse_result) = "success" Then
            Set col = dql.Execute(dqlTerm)
            MsgBox dql.Explain(dqlTerm)
            MsgBox parse_result
        End If

We can safely remove all of our “Error handling”, that means lines 14-17 and 20-22. Why? Because dql.Excecute(dqlTerm) does the parse before executing the query.

So we end up with the following code

public Sub foo() 
	Dim session As New NotesSession
	Dim db As NotesDatabase
	Dim col As NotesDocumentCollection
	Dim dqlTerm As String
	dqlTerm = "'all'.rule_unid = '99A242AAB69B5BB9C1257FFC005DE6C4'"

	Set db = session.Getdatabase("","trul-big.nsf", False)
	If db.Isopen Then
		Set dql = db.CreateDominoQuery()
		Set col = dql.Execute(dqlTerm)
		MsgBox dql.Explain(dqlTerm)
	End If
End Sub

When we run the code, we get

Keep in mind that the numbers vary a litte bit from run to run.

If we now modify our dqlTerm and add an error, we are shown a nice dialog box explaining the error in detail.

That’s all for today, I hope you find this information useful.

Bye, bye, Watson Workspace

I received the following mail from IBM announcing the End of Marketing for all Watson Workspace offerings and ending the Watson Workspace service on 2/28/19.

Watson Workspace Announcement

Tomorrow, Tuesday 15 Jan 2019, IBM will formally announce the End of Marketing for all Watson Workspace offerings and we anticipate ending the Watson Workspace service on 2/28/19. This includes Watson Workspace Essentials, Plus, and the free offering. It is our intent to ensure that you have a clear understanding of your options regarding the closure of Watson Workspace.
While there is no question that Watson Workspace is innovative and agile, it hasn’t resonated with clients or obtained the traction in the marketplace necessary for IBM to continue forward with the service. Despite our best efforts and enthusiasm for these offerings, our decision to withdraw them aligns to IBM’s investment strategy, focused on delivering solutions that deliver measurable value to our customers and business partners.
IBM has stopped accepting new orders for Watson Workspace products, and we will not be adding any new features to the offerings. We have been working with our licensed customers and business partners to provide options for handling subscriptions and contracts once the end of service announcement is published to provide a smooth transition.
Starting tomorrow there will be a banner placed into the UI of Watson Workspace informing users of the timeline for moving off the service. Mobile customers may find details in the release notes of the mobile app. We will also provide access to a tool that will allow you to download and save your conversations and content from Watson Workspace. Please plan accordingly to capture any content you’d like to retain as we work to sunset the service. This option will only be available for a limited time.
Thank you for your support of Watson Workspace and IBM Collaboration Solutions. Please find additional details and answers to commonly asked questions in the FAQ that will be posted in the Watson Workspace banner tomorrow.

IBM Collaboration Services, Offering Management

NotesHttpRequest LotusScript example

NotesHttpRequest is a new LotusScript class in Notes V10.0.1 used to make HTTP requests to web servers.

The example wraps the get(), post(), put() and deleteResource() methods in a LotusScript class.

I have also put together a small Node.js / Express.js project that can be used as test server for the NotesHttpRequest example.

Class HttpRequestWrapper

	Library 10010.http
	Created Jan 8, 2019 by Ulrich Krause/singultus
Option Public
Option Declare

Const BASE_URL_PORT = ""
Const CLASS_CUSTOMER ="customers"

Const CUSTOMER_5 = |{
					"firstname" : "Ulrich",
					"lastname" : "Krause",
					"age" : 59,
					"id" : 5

					"firstname" : "Heinz Ulrich",
					"lastname" : "Krause",
					"age" : 59,
					"id" : 5
	Class HttpRequestWrapper
Public Class HttpRequestWrapper
	Private m_session As NotesSession
	Private m_url As String
	Private m_class As String
	Private m_json As String
	Private m_httpRequest As NOTESHTTPREQUEST
		Sub New
	Public Sub New()
		Set m_session = New NotesSession
		Set m_httpRequest = me.m_session.CreateHttpRequest()
		m_httpRequest.Preferstrings = True
		m_url = BASE_URL_PORT
		m_class = CLASS_CUSTOMER
	End Sub
		Function getApiVersion
	Public sub getApiVersion()
		m_json = m_httpRequest.Get(BASE_URL_PORT)
		MsgBox m_json
	End Sub
		Sub getAllObj
	Public Sub getAllObj()
		m_json = m_httpRequest.Get(_
		MsgBox m_json
	End Sub
		Sub getObjById
	Public Sub getObjById(id As String)
		m_json = m_httpRequest.Get(_
		MsgBox m_json	
	End Sub
		Sub createObj
	Public Sub createObj()
		m_json = m_httpRequest.Post(_
		MsgBox m_json	
	End Sub
		Sub updateObj
	Public Sub updateObj(id As String)
		m_json = m_httpRequest.Put(_
		MsgBox m_json
	End Sub
		Sub deleteObj
	Public Sub deleteObj(id As String)
		m_json = m_httpRequest.DeleteResource(_
		MsgBox m_json
	End Sub
End Class

Public Function removeCRLF(json As String) As String
	removeCRLF = Replace(Replace(json, Chr(13), ""),Chr(10),"")
End Function

Sample usage:

Use "10010.http"

Sub Click(Source As Button)
	Dim httpRequestWrapper As New HttpRequestWrapper()

	Call httpRequestWrapper.getApiVersion()
	Call httpRequestWrapper.createObj()
	Call httpRequestWrapper.deleteObj("3")
	Call httpRequestWrapper.getAllObj()
	Call httpRequestWrapper.updateObj("5")
	Call httpRequestWrapper.getObjById("5")
End Sub

Starting Express.js applications with PM2

I recently ran into an issue with PM2. I have created a “helloworld” applications using Express.js.

[root@nodejs projects]# express helloworld
warning: the default view engine will not be jade in future releases
warning: use --view=jade' or--help' for additional options
create : helloworld/
create : helloworld/public/
create : helloworld/public/javascripts/
create : helloworld/public/images/
create : helloworld/public/stylesheets/
create : helloworld/public/stylesheets/style.css
create : helloworld/routes/
create : helloworld/routes/index.js
create : helloworld/routes/users.js
create : helloworld/views/
create : helloworld/views/error.jade
create : helloworld/views/index.jade
create : helloworld/views/layout.jade
create : helloworld/app.js
create : helloworld/package.json
create : helloworld/bin/
create : helloworld/bin/www
change directory:
$ cd helloworld
install dependencies:
$ npm install
run the app:
$ DEBUG=helloworld:* npm start

The application started without issues with npm start.

Next I started the application with PM2

[root@nodejs helloworld]# pm2 start app.js

PM2 displayed the application as “online”, but it constantly restarted and was not accessible.

I found the solution here

[root@nodejs helloworld]# pm2 start bin/www

did the trick for me.

nginx + node.js + CentOS 7 = 502 Bad Gateway

I have setup a new Node.js / Express development environment on a CentOS 7 VM. I ‘ll describe the details in another post later.

To test my setp, I created a new Express application “helloworld”. The application listens on port 3000 and I was able to connect to the application using a browser.

Next, I configured NGINX as reverse proxy to use port 80 to access the helloworld application.

But I got an error

I checked the logs

[root@nodejs ~]# cat /var/log/audit/audit.log | grep nginx | grep denied

and got

type=AVC msg=audit(1546783734.750:239): avc:  denied  { name_connect } for  pid=11084 comm="nginx" dest=3000 scontext=system_u:system_r:httpd_t:s0 tcontext=system_u:object_r:ntop_port_t:s0 tclass=tcp_socket permissive=0

My best guess was SELinux.I checked, if SELinux was enabled.

[root@nodejs ~]# sestatus

SELinux status: enabled
SELinuxfs mount: /sys/fs/selinux
SELinux root directory: /etc/selinux
Loaded policy name: targeted
Current mode: enforcing
Mode from config file: enforcing
Policy MLS status: enabled
Policy deny_unknown status: allowed
Max kernel policy version: 31

Next I checked the settings for httpd.

[root@nodejs ~]# getsebool -a | grep httpd
httpd_anon_write --> off
httpd_builtin_scripting --> on
httpd_can_check_spam --> off
httpd_can_connect_ftp --> off
httpd_can_connect_ldap --> off
httpd_can_connect_mythtv --> off
httpd_can_connect_zabbix --> off
httpd_can_network_connect --> off
httpd_can_network_connect_cobbler --> off
httpd_can_network_connect_db --> off
httpd_can_network_memcache --> off
httpd_can_network_relay --> off
httpd_can_sendmail --> off

So, httpd_can_network_connect was set to “Off”. This blocks the connection from the reverse proxy to the node.js application. As a result, you get the 502 Bad gateway error.

To enable the setting, execute the following command from the shell.

[root@nodejs ~]# setsebool -P httpd_can_network_connect on

You do not need to reboot the machine or SELinux.

ESXi 6.7 Update Failed

I just tried to update my ESXi 6.7 host from ESXi-6.7.0-20181002001-standard (Build 10302608) to ESXi-6.7.0-20181104001-standard (Build 10764712).

Find a list for all available updates and patches here.

The update process in general is straight forward. SSH into your ESXi host and execute the following commands.

esxcli network firewall ruleset set -e true -r httpClient
esxcli software profile update -p ESXi-6.7.0-20181104001-standard -d
esxcli network firewall ruleset set -e false -r httpClient

(replace the highlighted version with the version you want to upgrade to )

This time, the update failed.

Failed to setup upgrade using esx-update VIB: (None, "Failed to mount tardisk /tmp/esx-update-2123405/esxupdt-2123405 in ramdisk esx-update-2123405: [Errno 1] Operation not permitted: '/tardisks.noauto/esxupdt-2123405'")
vibs = ['VMware_bootbank_esx-update_6.7.0-1.31.10764712']
Please refer to the log file for more details.

Digging into the logs, I found the following clues

cpu1:2099635)ALERT: VisorFSTar: 1655: Unauthorized attempt to mount a tardisk
cpu1:2099635)VisorFSTar: 2062: Access denied by vmkernel access control policy prevented creating tardisk

esxupdate: 2099635: root: ERROR: File "/build/mts/release/bora-10302608/bora/build/esx/release/vmvisor/sys-boot/lib64/python3.5/", line 544, in move
esxupdate: 2099635: root: ERROR: PermissionError: [Errno 1] Operation not permitted: '/tmp/esx-update-2123405 /esxupdt-2123405' -> '/tardisks.noauto/esxupdt-2123405 '

By the way, the esxupdate.log is in HEX format for some reason.

You can either use a HEX-Editor to decode the file, or open it in Visual Studio Code.

You’ll get a warning; just click on “Do you want to open it anyway?

After a couple of try and error, I was able to get the updated VIBs using

[root@esxi:~] esxcli software vib update --depot=
Installation Result
Message: The update completed successfully, but the system needs to be rebooted for the changes to be effective.
Reboot Required: true
VIBs Installed: VMware_bootbank_esx-base_6.7.0-1.31.10764712, VMware_bootbank_esx-ui_1.31.0-10201673, VMware_bootbank_esx-update_6.7.0-1.31.10764712, VMware_bootbank_sata-ahci_3.0-28vmw.600.3.107.10474991, VMware_bootbank_vsan_6.7.0-1.31.10720746, VMware_bootbank_vsanhealth_6.7.0-1.31.10720754
VIBs Removed: VMW_bootbank_sata-ahci_3.0-26vmw.670.0.0.8169922, VMware_bootbank_esx-base_6.7.0-1.28.10302608, VMware_bootbank_esx-ui_1.30.0-9946814, VMware_bootbank_esx-update_6.7.0-1.28.10302608, VMware_bootbank_vsan_6.7.0-1.28.10290435, VMware_bootbank_vsanhealth_6.7.0-1.28.10290721
VIBs Skipped: VMW_bootbank_ata-libata-92_3.00.9.2-16vmw.670.0.0.8169922, VMW_bootbank_ata-pata-amd_0.3.10-3vmw.670.0.0.8169922, VMW_bootbank_ata-pata-atiixp_0.4.6-4vmw.670.0.0.8169922, VMW_bootbank_ata-pata-cmd64x_0.2.5-3vmw.670.0.0.8169922, VMW_bootbank_ata-pata-hpt3x2n_0.3.4-3vmw.670.0.0.8169922, VMW_bootbank_ata-pata-pdc2027x_1.0-3vmw.670.0.0.8169922, VMW_bootbank_ata-pata-serverworks_0.4.3-3vmw.670.0.0.8169922, VMW_bootbank_ata-pata-sil680_0.4.8-3vmw.670.0.0.8169922, VMW_bootbank_ata-pata-via_0.3.3-2vmw.670.0.0.8169922, VMW_bootbank_block-cciss_3.6.14-10vmw.670.0.0.8169922, VMW_bootbank_bnxtnet_20.6.101.7-11vmw.670.0.0.8169922, VMW_bootbank_bnxtroce_20.6.101.0-20vmw.670.1.28.10302608, VMW_bootbank_brcmfcoe_11.4.1078.5-11vmw.670.1.28.10302608, VMW_bootbank_char-random_1.0-3vmw.670.0.0.8169922, VMW_bootbank_ehci-ehci-hcd_1.0-4vmw.670.0.0.8169922, VMW_bootbank_elxiscsi_11.4.1174.0-2vmw.670.0.0.8169922, VMW_bootbank_elxnet_11.4.1095.0-5vmw.670.1.28.10302608, VMW_bootbank_hid-hid_1.0-3vmw.670.0.0.8169922, VMW_bootbank_i40en_1.3.1-22vmw.670.1.28.10302608, VMW_bootbank_iavmd_1.2.0.1011-2vmw.670.0.0.8169922, VMW_bootbank_igbn_0.1.0.0-15vmw.670.0.0.8169922, VMW_bootbank_ima-qla4xxx_2.02.18-1vmw.670.0.0.8169922, VMW_bootbank_ipmi-ipmi-devintf_39.1-5vmw.670.1.28.10302608, VMW_bootbank_ipmi-ipmi-msghandler_39.1-5vmw.670.1.28.10302608, VMW_bootbank_ipmi-ipmi-si-drv_39.1-5vmw.670.1.28.10302608, VMW_bootbank_iser_1.0.0.0-1vmw.670.1.28.10302608, VMW_bootbank_ixgben_1.4.1-16vmw.670.1.28.10302608, VMW_bootbank_lpfc_11.4.33.3-11vmw.670.1.28.10302608, VMW_bootbank_lpnic_11.4.59.0-1vmw.670.0.0.8169922, VMW_bootbank_lsi-mr3_7.702.13.00-5vmw.670.1.28.10302608, VMW_bootbank_lsi-msgpt2_20.00.04.00-5vmw.670.1.28.10302608, VMW_bootbank_lsi-msgpt35_03.00.01.00-12vmw.670.1.28.10302608, VMW_bootbank_lsi-msgpt3_16.00.01.00-3vmw.670.1.28.10302608, VMW_bootbank_misc-cnic-register_1.78.75.v60.7-1vmw.670.0.0.8169922, VMW_bootbank_misc-drivers_6.7.0-0.0.8169922, VMW_bootbank_mtip32xx-native_3.9.8-1vmw.670.1.28.10302608, VMW_bootbank_ne1000_0.8.4-1vmw.670.1.28.10302608, VMW_bootbank_nenic_1.0.21.0-1vmw.670.1.28.10302608, VMW_bootbank_net-bnx2_2.2.4f.v60.10-2vmw.670.0.0.8169922, VMW_bootbank_net-bnx2x_1.78.80.v60.12-2vmw.670.0.0.8169922, VMW_bootbank_net-cdc-ether_1.0-3vmw.670.0.0.8169922, VMW_bootbank_net-cnic_1.78.76.v60.13-2vmw.670.0.0.8169922, VMW_bootbank_net-e1000_8.0.3.1-5vmw.670.0.0.8169922, VMW_bootbank_net-e1000e_3.2.2.1-2vmw.670.0.0.8169922, VMW_bootbank_net-enic_2.1.2.38-2vmw.670.0.0.8169922, VMW_bootbank_net-fcoe_1., VMW_bootbank_net-forcedeth_0.61-2vmw.670.0.0.8169922, VMW_bootbank_net-igb_5., VMW_bootbank_net-ixgbe_3., VMW_bootbank_net-libfcoe-92_1., VMW_bootbank_net-mlx4-core_1.9.7.0-1vmw.670.0.0.8169922, VMW_bootbank_net-mlx4-en_1.9.7.0-1vmw.670.0.0.8169922, VMW_bootbank_net-nx-nic_5.0.621-5vmw.670.0.0.8169922, VMW_bootbank_net-tg3_3.131d.v60.4-2vmw.670.0.0.8169922, VMW_bootbank_net-usbnet_1.0-3vmw.670.0.0.8169922, VMW_bootbank_net-vmxnet3_1.1.3.0-3vmw.670.0.0.8169922, VMW_bootbank_nfnic_4.0.0.14-0vmw.670.1.28.10302608, VMW_bootbank_nhpsa_2.0.22-3vmw.670.1.28.10302608, VMW_bootbank_nmlx4-core_3.17.9.12-1vmw.670.0.0.8169922, VMW_bootbank_nmlx4-en_3.17.9.12-1vmw.670.0.0.8169922, VMW_bootbank_nmlx4-rdma_3.17.9.12-1vmw.670.0.0.8169922, VMW_bootbank_nmlx5-core_4.17.9.12-1vmw.670.0.0.8169922, VMW_bootbank_nmlx5-rdma_4.17.9.12-1vmw.670.0.0.8169922, VMW_bootbank_ntg3_4.1.3.2-1vmw.670.1.28.10302608, VMW_bootbank_nvme_1.2.2.17-1vmw.670.1.28.10302608, VMW_bootbank_nvmxnet3-ens_2.0.0.21-1vmw.670.0.0.8169922, VMW_bootbank_nvmxnet3_2.0.0.29-1vmw.670.1.28.10302608, VMW_bootbank_ohci-usb-ohci_1.0-3vmw.670.0.0.8169922, VMW_bootbank_pvscsi_0.1-2vmw.670.0.0.8169922, VMW_bootbank_qcnic_1., VMW_bootbank_qedentv_2.0.6.4-10vmw.670.1.28.10302608, VMW_bootbank_qfle3_1.0.50.11-9vmw.670.0.0.8169922, VMW_bootbank_qfle3f_1., VMW_bootbank_qfle3i_1., VMW_bootbank_qflge_1.1.0.11-1vmw.670.0.0.8169922, VMW_bootbank_sata-ata-piix_2.12-10vmw.670.0.0.8169922, VMW_bootbank_sata-sata-nv_3.5-4vmw.670.0.0.8169922, VMW_bootbank_sata-sata-promise_2.12-3vmw.670.0.0.8169922, VMW_bootbank_sata-sata-sil24_1.1-1vmw.670.0.0.8169922, VMW_bootbank_sata-sata-sil_2.3-4vmw.670.0.0.8169922, VMW_bootbank_sata-sata-svw_2.3-3vmw.670.0.0.8169922, VMW_bootbank_scsi-aacraid_1.1.5.1-9vmw.670.0.0.8169922, VMW_bootbank_scsi-adp94xx_1.0.8.12-6vmw.670.0.0.8169922, VMW_bootbank_scsi-aic79xx_3.1-6vmw.670.0.0.8169922, VMW_bootbank_scsi-bnx2fc_1.78.78.v60.8-1vmw.670.0.0.8169922, VMW_bootbank_scsi-bnx2i_2.78.76.v60.8-1vmw.670.0.0.8169922, VMW_bootbank_scsi-fnic_1.5.0.45-3vmw.670.0.0.8169922, VMW_bootbank_scsi-hpsa_6.0.0.84-3vmw.670.0.0.8169922, VMW_bootbank_scsi-ips_7.12.05-4vmw.670.0.0.8169922, VMW_bootbank_scsi-iscsi-linux-92_1.0.0.2-3vmw.670.0.0.8169922, VMW_bootbank_scsi-libfc-92_1., VMW_bootbank_scsi-megaraid-mbox_2.20.5.1-6vmw.670.0.0.8169922, VMW_bootbank_scsi-megaraid-sas_6.603.55.00-2vmw.670.0.0.8169922, VMW_bootbank_scsi-megaraid2_2.00.4-9vmw.670.0.0.8169922, VMW_bootbank_scsi-mpt2sas_19.00.00.00-2vmw.670.0.0.8169922, VMW_bootbank_scsi-mptsas_4.23.01.00-10vmw.670.0.0.8169922, VMW_bootbank_scsi-mptspi_4.23.01.00-10vmw.670.0.0.8169922, VMW_bootbank_scsi-qla4xxx_5.01.03.2-7vmw.670.0.0.8169922, VMW_bootbank_shim-iscsi-linux-9-2-1-0_6.7.0-0.0.8169922, VMW_bootbank_shim-iscsi-linux-9-2-2-0_6.7.0-0.0.8169922, VMW_bootbank_shim-libata-9-2-1-0_6.7.0-0.0.8169922, VMW_bootbank_shim-libata-9-2-2-0_6.7.0-0.0.8169922, VMW_bootbank_shim-libfc-9-2-1-0_6.7.0-0.0.8169922, VMW_bootbank_shim-libfc-9-2-2-0_6.7.0-0.0.8169922, VMW_bootbank_shim-libfcoe-9-2-1-0_6.7.0-0.0.8169922, VMW_bootbank_shim-libfcoe-9-2-2-0_6.7.0-0.0.8169922, VMW_bootbank_shim-vmklinux-9-2-1-0_6.7.0-0.0.8169922, VMW_bootbank_shim-vmklinux-9-2-2-0_6.7.0-0.0.8169922, VMW_bootbank_shim-vmklinux-9-2-3-0_6.7.0-0.0.8169922, VMW_bootbank_smartpqi_1.0.1.553-12vmw.670.1.28.10302608, VMW_bootbank_uhci-usb-uhci_1.0-3vmw.670.0.0.8169922, VMW_bootbank_usb-storage-usb-storage_1.0-3vmw.670.0.0.8169922, VMW_bootbank_usbcore-usb_1.0-3vmw.670.0.0.8169922, VMW_bootbank_vmkata_0.1-1vmw.670.0.0.8169922, VMW_bootbank_vmkfcoe_1.0.0.1-1vmw.670.1.28.10302608, VMW_bootbank_vmkplexer-vmkplexer_6.7.0-0.0.8169922, VMW_bootbank_vmkusb_0.1-1vmw.670.1.28.10302608, VMW_bootbank_vmw-ahci_1.2.3-1vmw.670.1.28.10302608, VMW_bootbank_xhci-xhci_1.0-3vmw.670.0.0.8169922, VMware_bootbank_cpu-microcode_6.7.0-1.28.10302608, VMware_bootbank_elx-esx-libelxima.so_11.4.1184.0-0.0.8169922, VMware_bootbank_esx-dvfilter-generic-fastpath_6.7.0-0.0.8169922, VMware_bootbank_esx-xserver_6.7.0-0.0.8169922, VMware_bootbank_lsu-hp-hpsa-plugin_2.0.0-16vmw.670.1.28.10302608, VMware_bootbank_lsu-intel-vmd-plugin_1.0.0-2vmw.670.1.28.10302608, VMware_bootbank_lsu-lsi-lsi-mr3-plugin_1.0.0-13vmw.670.1.28.10302608, VMware_bootbank_lsu-lsi-lsi-msgpt3-plugin_1.0.0-8vmw.670.0.0.8169922, VMware_bootbank_lsu-lsi-megaraid-sas-plugin_1.0.0-9vmw.670.0.0.8169922, VMware_bootbank_lsu-lsi-mpt2sas-plugin_2.0.0-7vmw.670.0.0.8169922, VMware_bootbank_lsu-smartpqi-plugin_1.0.0-3vmw.670.1.28.10302608, VMware_bootbank_native-misc-drivers_6.7.0-0.0.8169922, VMware_bootbank_qlnativefc_3.0.1.0-5vmw.670.0.0.8169922, VMware_bootbank_rste_2.0.2.0088-7vmw.670.0.0.8169922, VMware_bootbank_vmware-esx-esxcli-nvme-plugin_1.2.0.34-1.28.10302608, VMware_locker_tools-light_10.3.2.9925305-10176879

[HomeLab] – Copy VM from one ESXi host to another

I recently decided that it is time to setup a new homelab. The old server is about 10 yrs old. The hardware does not allow any upgrade in CPU and Ram. VMWare ESXi was version 6.5, but I could not upgrade to version 6.7 because the network card was not in the list of supported NICs and so the upgrade failed. Last, but not least, the power consumption was at 200W.

The new HomeLab has the following components

It took less than 30 minutes to assemble the NUC and install VMWare ESXi 6.7. ( + 15 minutes to drive to the local hardware store to grab an USB keyboard once I realized that I would need one for the setup )

Today, I migrated the existing VMs from the old host to the new one.

ESXi does not include VMotion. VMotion costs a lot of money.
I had read some articles which claimed to be best practice. But to be honest, using Veeam or SCP are not, what I consider “best” practice. I tried SCP, but it was so slooooow. Even a 50GB VM was estimated 11 hours to copy. And I have 30 VMs from just a couple of MB to 100GB.

I searched for a better solution. And I finally found it. VMware vCenter Converter Standalone Client.

You simply choose the “source” ESXi instance and select the VM to copy. Next you select the “target” ESXi. You can also choose, if the copy will be automatically updated to the target VM version.

It took only 30 minutes to copy a 50GB VM. Another 100GB VM was copied in 20 minutes.

The whole migration was done in only 5 hours. Not bad, isn’t it.

NotesJsonNavigator.getElementByPointer example

Sample code:

Const white = |{"color": "white", "category": "value","code": {"rgba": [0,0,0,1],"hex": "#FFF"}}|

Public Sub testJsonNavGetElementByPointer()
	Dim session As New NotesSession
	Dim jsnav As NotesJSONNavigator 
	Set jsnav = session.CreateJSONNavigator(removeCRLF(white)) 
	'// returns "value"
	Set el = jsnav.Getelementbypointer("/category")
	MsgBox "category: " + el.Value
	'// returns "#FFF"
	Set el = jsnav.Getelementbypointer("/code/hex")
	MsgBox "hex: " + el.Value
	'// returns the 4th element in the rgba array  "1"
	Set el = jsnav.Getelementbypointer("/code/rgba/3")
	MsgBox "code/rgba/3: " + el.Value
End Sub

General information about JSON pointer:

NotesJsonNavigator.getNthElement does not obey boundries

I stumbled upon an issue with NotesJsonNavigator getNthElement(index) method.

It looks like there is no boundry check, which leads to some inconsitent behaviour and unpredictable results.

Here is the code that I used in my test.

	Sub testJsonNavGetNthElement
Public Sub testJsonNavGetNthElement
	Dim s As New NotesSession 
	Dim jsnav As NotesJSONNavigator
	Dim el As NotesJSONElement
	Set jsnav = s.CreateJSONNavigator(|{ "element1" : "value 1", "element2" : "value 2", "element3 ": "value 3" }|)	
	Set el = jsnav.GetNthElement(0)
	Set el = jsnav.GetNthElement(1)
	Set el = jsnav.GetNthElement(2)
	Set el = jsnav.GetNthElement(3)
	Set el = jsnav.GetNthElement(1000)
End Sub

The issue occurs with index < 1 and > upper bound of the array.

Index 0 AND index 1 both return the same value; “value 1“.
Index 1000 returns NULL or nothing.

This is not the expected behaviour. At least I would expect some “out of bounds” error.
Also, it is not clear for me what the base for the index is. Do we start counting at 0 or do we start with 1 ?

According to the documentation, the index is 1-based.

NotesJsonNavigator, NotesJsonElement, NotesJsonArray, NotesJsonObject example

NotesJsonNavigator, NotesJsonElement, NotesJsonArray, NotesJsonObject are new classes in Domino Designer as of Notes V10.0.1. They are not yet documented in the Domino Designer Help, but you can find online documentation following the above links.

The documentation also contains some basic samples.

In this article, I will demonstrate how to use the classes beyond the basic examples.
I’ll also show, how you can use the new NotesHttpRequest class to connect to a server and read and parse view data as JSON.

The first thing you need to know is that the NotesJsonNavigator class does not like CRLF.
When you try to create a new NotesJsonNavigator from the following JSON data

Const colors = |{
  "colors": [
      "color": "black",
      "category": "hue",
      "type": "primary",
      "code": {
        "rgba": [255,255,255,1],
        "hex": "#000"
      "color": "white",
      "category": "value",
      "code": {
        "rgba": [0,0,0,1],
        "hex": "#FFF"
      "color": "red",
      "category": "hue",
      "type": "primary",
      "code": {
        "rgba": [255,0,0,1],
        "hex": "#FF0"
      "color": "blue",
      "category": "hue",
      "type": "primary",
      "code": {
        "rgba": [0,0,255,1],
        "hex": "#00F"
      "color": "yellow",
      "category": "hue",
      "type": "primary",
      "code": {
        "rgba": [255,255,0,1],
        "hex": "#FF0"
      "color": "green",
      "category": "hue",
      "type": "secondary",
      "code": {
        "rgba": [0,255,0,1],
        "hex": "#0F0"

you will get an error.

You can remove all CRLF from the data using this helper function.

Public Function removeCRLF(json As String) As String
	removeCRLF = Replace(Replace(json, Chr(13), ""),Chr(10),"")
End Function

Let us create the NotesJsonNavigator from NotesSession first.

Dim session As New NotesSession 
Dim jsnav As NotesJSONNavigator 
Dim json As String
json = removeCRLF(colors)
Set jsnav = session.CreateJSONNavigator(json)

Now we can count how many different colors we would find in our JSON object

Set el = jsnav.GetFirstElement()

Set arr = el.value
MsgBox "Elements count: " + CStr(arr.size)

And finally, we want to get the value for the second color in the JSON object.

Although there is a GetNthElement (index) method, this method seems to be buggy or not yet fully implemented. GetNthElement(index) will always return the first element from the JSON object.

So we will use GetFirstElement and GetNextElement to navigate thru the object.

'Set el = arr.Getnthelement(2)
Set el = arr.GetFirstElement()
Set el = arr.GetNextElement()

Set obj = el.Value
Set el = obj.Getelementbyname("color")
MsgBox "color: " + CStr(el.Value)

The next sample creates a NotesHttpRequest and gets JSON from a view in a Notes application. Then we retrieve the UNID and NoteId from the data returned using the new NotesJson… classes.

	Library 10010.http
	Created Jan 1, 2019 by Ulrich Krause/singultus
	Description: Comments for Library
Option Public
Option Declare

Public Sub httpGet
	Dim Session As New NotesSession        
	Dim ret As String
	Dim URL As String

	Dim user As String
	Dim password As String
	Dim httpReq As NotesHTTPRequest
	Set httpReq = session.CreateHttpRequest()
	httpReq.Preferstrings = True
	user = ""
	password = "pAssw0rd"
	URL = "https://yourserver/names.nsf/($certifiers)?readviewentries&outputformat=JSON"

	Call httpReq.Setheaderfield("Authorization", "Basic " + EncodeBase64 (user + ":" + password))

	Dim json As string
	json = httpReq.Get(URL)

	Dim jsnav As NotesJSONNavigator 
	Set jsnav = session.CreateJSONNavigator(removeCRLF(json))


	Set el = jsnav.GetElementByName("viewentry")

	Set arr = el.value
	Set el = arr.GetFirstElement()
	Set el = arr.GetNextElement()
	Set obj = el.Value
	Set el = obj.Getelementbyname("@unid")

	MsgBox "unid: " + CStr(el.Value)
	Set el = obj.Getelementbyname("@noteid")

	MsgBox "noteid: " + CStr(el.Value)

End Sub

Private Function removeCRLF(json As String) As String
	removeCRLF = Replace(Replace(json, Chr(13), ""),Chr(10),"")
End Function

Private Function EncodeBase64 (StrIn As String) As String
	Dim session As New NotesSession
	Dim stream As NotesStream
	Dim db As NotesDatabase
	Dim doc As NotesDocument
	Dim body As NotesMIMEEntity
	Set stream = session.CreateStream
	Call stream.WriteText (StrIn)
	Set db = session.CurrentDatabase
	Set doc = db.CreateDocument
	Set body  = doc.CreateMIMEEntity
	Call body.SetContentFromText (stream, "", ENC_NONE)
	Call body.EncodeContent (ENC_BASE64)
	EncodeBase64 = body.ContentAsText
	Call stream.Close
	Set doc = Nothing
End Function

Finding And Fixing Node.js Memory Leaks: A Practical Guide

Fixing memory leaks may not be not the shiniest skill on a CV, but when things go wrong on production, it’s better to be prepared!
After reading this article, you’ll be able to monitor, understand, and debug the memory consumption of a Node.js application.

Kévin Maschtaler

In addition to this very good article , here are a couple of tipps how to enable remote debugging.

node –inspect= yourapp.js

This will bind the debugger to a different IP address:port. Otherwise only LOCALHOST will be available

If you are using PM2

pm2 start –node-args=”–inspect=″ yourapp.js

Then open Chrome browser and navigate to chrome://inspect

Check “Discover network targets” and click “Configure”

Your application is ready for inspect