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Re: [paho-dev] paho-dev Digest, Vol 50, Issue 16
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Hi Andy,
Unfortunately, no, this is not the purpose. So, this utility isnt a REAL subscriber. Messages will be donsumed by actual subscribers. This utility will simply browse the messages and list them for viewing. Something similar to IBM mq windows explorere etc.
Sent from mobile device.
________________________________________
From: paho-dev-bounces@xxxxxxxxxxx [paho-dev-bounces@xxxxxxxxxxx] on behalf of paho-dev-request@xxxxxxxxxxx [paho-dev-request@xxxxxxxxxxx]
Sent: 08 February 2016 23:14
To: paho-dev@xxxxxxxxxxx
Subject: paho-dev Digest, Vol 50, Issue 16
Send paho-dev mailing list submissions to
paho-dev@xxxxxxxxxxx
To subscribe or unsubscribe via the World Wide Web, visit
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or, via email, send a message with subject or body 'help' to
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You can reach the person managing the list at
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of paho-dev digest..."
Today's Topics:
1. Re: non-destructive read (Andy Stanford-Clark)
----------------------------------------------------------------------
Message: 1
Date: Mon, 8 Feb 2016 17:44:04 +0000
From: Andy Stanford-Clark <ANDYSC@xxxxxxxxxx>
To: General development discussions for paho project
<paho-dev@xxxxxxxxxxx>
Subject: Re: [paho-dev] non-destructive read
Message-ID:
<OF71380397.FA44BF12-ON80257F53.006149C0-80257F53.00616B4C@xxxxxxxxxx>
Content-Type: text/plain; charset="us-ascii"
your utility app will receive its own copy of all the messages that are
published to the topic you are watching.
So you can look at and browse them for debug purposes, as it will be your
own copy, and won't interfere at all with any of the messages received by
other subscribers.
That's the beauty of pub/sub ;)
Does that help for what you're trying to do?
Andy
Andy Stanford-Clark
Distinguished Engineer, Internet of Things
Master Inventor, Member IBM Academy of Technology, Fellow BCS
Honorary Professor University of East Anglia, Visiting Professor
University of Newcastle
Tel: +44 (0)7801 787096 [internal: 37 277624] twitter:@andysc
From: Rohit Dhall <dhall.r@xxxxxxx>
To: "paho-dev@xxxxxxxxxxx" <paho-dev@xxxxxxxxxxx>,
Date: 08/02/2016 14:34
Subject: Re: [paho-dev] non-destructive read
Sent by: paho-dev-bounces@xxxxxxxxxxx
Hi,
Retained message may not serve for what I am looking. I am planning a UI
based utility for browsing messages,for easy testing/debugging during
development,so that devs can see messages lying in the topic. I
understand mqtt doesnt support it. What are the alternatives?
Sent from mobile device.
________________________________________
From: paho-dev-bounces@xxxxxxxxxxx [paho-dev-bounces@xxxxxxxxxxx] on
behalf of paho-dev-request@xxxxxxxxxxx [paho-dev-request@xxxxxxxxxxx]
Sent: 08 February 2016 18:58
To: paho-dev@xxxxxxxxxxx
Subject: paho-dev Digest, Vol 50, Issue 14
Send paho-dev mailing list submissions to
paho-dev@xxxxxxxxxxx
To subscribe or unsubscribe via the World Wide Web, visit
https://dev.eclipse.org/mailman/listinfo/paho-dev
or, via email, send a message with subject or body 'help' to
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You can reach the person managing the list at
paho-dev-owner@xxxxxxxxxxx
When replying, please edit your Subject line so it is more specific
than "Re: Contents of paho-dev digest..."
Today's Topics:
1. Re: non-destructive read (Stefano Costa)
2. Re: non-destructive read (Rohit Dhall)
3. Re: non-destructive read (Peter Niblett)
----------------------------------------------------------------------
Message: 1
Date: Mon, 08 Feb 2016 10:20:13 +0100
From: Stefano Costa <stefano.costa@xxxxxxxxxxx>
To: General development discussions for paho project
<paho-dev@xxxxxxxxxxx>
Subject: Re: [paho-dev] non-destructive read
Message-ID: <56B85DCD.2000700@xxxxxxxxxxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
On 08/02/2016 10:16, Kamil Baczkowicz wrote:
> Hi,
>
> What about creating a subscription for the relevant topic filter(s) and
> QoS=0? Is that not any good?
>
> Kamil
>
> On Mon, Feb 8, 2016 at 8:42 AM, Rohit Dhall <dhall.r@xxxxxxx> wrote:
>
>> Hi,
>>
>>
>>
>> Is there a way, I can browse messages lying on a mosquitto server
topic,
>> using java, without removing them(non-destructive read)?
>>
>>
>>
>> Any help/pointer to the correct APi will be of great help
On the other hand using "retained" messages is the MQTT way of
implementing something very similar.
--
Stefano Costa, Managing Director R&D
M +39 335 6565749
Skype stefanocosta.bluewind
Twitter @stefanobluewind
http://www.bluewind.it
------------------------------
Message: 2
Date: Mon, 8 Feb 2016 09:25:43 +0000
From: Rohit Dhall <dhall.r@xxxxxxx>
To: "paho-dev@xxxxxxxxxxx" <paho-dev@xxxxxxxxxxx>
Subject: Re: [paho-dev] non-destructive read
Message-ID:
<SG2PR04MB12301A69E83BAE5FA8215AC1E3D50@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Content-Type: text/plain; charset="us-ascii"
Hi Kamil,
>>>> What about creating a subscription for the relevant topic filter(s)
and QoS=0? Is that not any good?
This will cause the message to be delivered at most once. Not exactly what
I am looking for. I simply want to browse messages, without impacting
their delivery/consumption by any other application. If MQTT doesn't
support it directly, is there any other way around?
Regards,
Rohit Dhall
Enterprise Architect, Technology Office-TFG, HCL Technologies
+91-9811181701
-----Original Message-----
From: paho-dev-bounces@xxxxxxxxxxx [mailto:paho-dev-bounces@xxxxxxxxxxx]
On Behalf Of paho-dev-request@xxxxxxxxxxx
Sent: Monday, February 08, 2016 2:46 PM
To: paho-dev@xxxxxxxxxxx
Subject: paho-dev Digest, Vol 50, Issue 13
Send paho-dev mailing list submissions to
paho-dev@xxxxxxxxxxx
To subscribe or unsubscribe via the World Wide Web, visit
https://dev.eclipse.org/mailman/listinfo/paho-dev
or, via email, send a message with subject or body 'help' to
paho-dev-request@xxxxxxxxxxx
You can reach the person managing the list at
paho-dev-owner@xxxxxxxxxxx
When replying, please edit your Subject line so it is more specific than
"Re: Contents of paho-dev digest..."
Today's Topics:
1. Re: non-destructive read (Nicholas O'Leary)
2. Re: non-destructive read (Kamil Baczkowicz)
----------------------------------------------------------------------
Message: 1
Date: Mon, 8 Feb 2016 08:47:58 +0000
From: "Nicholas O'Leary" <nick.oleary@xxxxxxxxx>
To: General development discussions for paho project
<paho-dev@xxxxxxxxxxx>
Subject: Re: [paho-dev] non-destructive read
Message-ID:
<CAF=vhqf9QNAx-B8+96CC7ZZw9C=Vaf=H7gqp9mPNVMCZqb=_Ow@xxxxxxxxxxxxxx>
Content-Type: text/plain; charset="utf-8"
Hi,
no, the MQTT protocol does not support that type of operation.
Nick
On 8 February 2016 at 08:42, Rohit Dhall <dhall.r@xxxxxxx> wrote:
> Hi,
>
>
>
> Is there a way, I can browse messages lying on a mosquitto server
> topic, using java, without removing them(non-destructive read)?
>
>
>
> Any help/pointer to the correct APi will be of great help
>
>
>
> Regards,
>
> Rohit Dhall
>
> Enterprise Architect, Technology Office-TFG, HCL Technologies
>
> +91-9811181701
>
>
>
> [image: tfg]
>
>
> ::DISCLAIMER:: The contents of this e-mail and any attachment(s) are
> confidential and intended for the named recipient(s) only. E-mail
> transmission is not guaranteed to be secure or error-free as
> information could be intercepted, corrupted, lost, destroyed, arrive
> late or incomplete, or may contain viruses in transmission. The e mail
> and its contents (with or without referred errors) shall therefore not
> attach any liability on the originator or HCL or its affiliates. Views
> or opinions, if any, presented in this email are solely those of the
> author and may not necessarily reflect the views or opinions of HCL or
> its affiliates. Any form of reproduction, dissemination, copying,
> disclosure, modification, distribution and / or publication of this
> message without the prior written consent of authorized representative
> of HCL is strictly prohibited. If you have received this email in
> error please delete it and notify the sender immediately. Before
> opening any email and/or attachments, please check them for viruses and
other defects..
>
> _______________________________________________
> paho-dev mailing list
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> To change your delivery options, retrieve your password, or
> unsubscribe from this list, visit
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Message: 2
Date: Mon, 8 Feb 2016 09:16:20 +0000
From: Kamil Baczkowicz <kamil.baczkowicz@xxxxxxxxx>
To: General development discussions for paho project
<paho-dev@xxxxxxxxxxx>
Subject: Re: [paho-dev] non-destructive read
Message-ID:
<CAHtMjFr928Do+uWSZoEqPq5UFrdd17ykoko+e1gwERrQ1emp-w@xxxxxxxxxxxxxx>
Content-Type: text/plain; charset="utf-8"
Hi,
What about creating a subscription for the relevant topic filter(s) and
QoS=0? Is that not any good?
Kamil
On Mon, Feb 8, 2016 at 8:42 AM, Rohit Dhall <dhall.r@xxxxxxx> wrote:
> Hi,
>
>
>
> Is there a way, I can browse messages lying on a mosquitto server
> topic, using java, without removing them(non-destructive read)?
>
>
>
> Any help/pointer to the correct APi will be of great help
>
>
>
> Regards,
>
> Rohit Dhall
>
> Enterprise Architect, Technology Office-TFG, HCL Technologies
>
> +91-9811181701
>
>
>
> [image: tfg]
>
>
> ::DISCLAIMER:: The contents of this e-mail and any attachment(s) are
> confidential and intended for the named recipient(s) only. E-mail
> transmission is not guaranteed to be secure or error-free as
> information could be intercepted, corrupted, lost, destroyed, arrive
> late or incomplete, or may contain viruses in transmission. The e mail
> and its contents (with or without referred errors) shall therefore not
> attach any liability on the originator or HCL or its affiliates. Views
> or opinions, if any, presented in this email are solely those of the
> author and may not necessarily reflect the views or opinions of HCL or
> its affiliates. Any form of reproduction, dissemination, copying,
> disclosure, modification, distribution and / or publication of this
> message without the prior written consent of authorized representative
> of HCL is strictly prohibited. If you have received this email in
> error please delete it and notify the sender immediately. Before
> opening any email and/or attachments, please check them for viruses and
other defects..
>
> _______________________________________________
> paho-dev mailing list
> paho-dev@xxxxxxxxxxx
> To change your delivery options, retrieve your password, or
> unsubscribe from this list, visit
> https://dev.eclipse.org/mailman/listinfo/paho-dev
>
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End of paho-dev Digest, Vol 50, Issue 13
****************************************
------------------------------
Message: 3
Date: Mon, 8 Feb 2016 13:28:13 +0000
From: Peter Niblett <peter_niblett@xxxxxxxxxx>
To: General development discussions for paho project
<paho-dev@xxxxxxxxxxx>
Subject: Re: [paho-dev] non-destructive read
Message-ID:
<201602081328.u18DSMgk011009@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Content-Type: text/plain; charset="us-ascii"
Rohit
MQTT is based on a publish/subscribe concept, where each
subscriber/subscription has its own queue of pending messages. The only
way to access that queue via the MQTT protocol is to connect as that
subscriber, and which point the MQTT server will start trying to deliver
the messages to you. If the messages in question also match other
subscriptions, they will also be being queued up for those other
subscribers, and the fact that they have been delivered to you doesn't
affect those other applications - the messages will still be there waiting
for them when they next connect.
There's one other feature - the Retained Message. If someone publishes
a message as Retained, that message will be held on the server and any new
subscribers to its topic will receive a copy of that message. However this
isn't really a queue, since the server only holds the latest Retained
message for each topic.
Regards
Peter Niblett
IBM Senior Technical Staff Member
From: Rohit Dhall <dhall.r@xxxxxxx>
To: "paho-dev@xxxxxxxxxxx" <paho-dev@xxxxxxxxxxx>
Date: 08/02/2016 09:26
Subject: Re: [paho-dev] non-destructive read
Sent by: paho-dev-bounces@xxxxxxxxxxx
Hi Kamil,
>>>> What about creating a subscription for the relevant topic filter(s)
and QoS=0? Is that not any good?
This will cause the message to be delivered at most once. Not exactly what
I am looking for. I simply want to browse messages, without impacting
their delivery/consumption by any other application. If MQTT doesn't
support it directly, is there any other way around?
Regards,
Rohit Dhall
Enterprise Architect, Technology Office-TFG, HCL Technologies
+91-9811181701
-----Original Message-----
From: paho-dev-bounces@xxxxxxxxxxx [mailto:paho-dev-bounces@xxxxxxxxxxx]
On Behalf Of paho-dev-request@xxxxxxxxxxx
Sent: Monday, February 08, 2016 2:46 PM
To: paho-dev@xxxxxxxxxxx
Subject: paho-dev Digest, Vol 50, Issue 13
Send paho-dev mailing list submissions to
paho-dev@xxxxxxxxxxx
To subscribe or unsubscribe via the World Wide Web, visit
https://dev.eclipse.org/mailman/listinfo/paho-dev
or, via email, send a message with subject or body 'help' to
paho-dev-request@xxxxxxxxxxx
You can reach the person managing the list at
paho-dev-owner@xxxxxxxxxxx
When replying, please edit your Subject line so it is more specific than
"Re: Contents of paho-dev digest..."
Today's Topics:
1. Re: non-destructive read (Nicholas O'Leary)
2. Re: non-destructive read (Kamil Baczkowicz)
----------------------------------------------------------------------
Message: 1
Date: Mon, 8 Feb 2016 08:47:58 +0000
From: "Nicholas O'Leary" <nick.oleary@xxxxxxxxx>
To: General development discussions for paho project
<paho-dev@xxxxxxxxxxx>
Subject: Re: [paho-dev] non-destructive read
Message-ID:
<CAF=vhqf9QNAx-B8+96CC7ZZw9C=Vaf=H7gqp9mPNVMCZqb=_Ow@xxxxxxxxxxxxxx>
Content-Type: text/plain; charset="utf-8"
Hi,
no, the MQTT protocol does not support that type of operation.
Nick
On 8 February 2016 at 08:42, Rohit Dhall <dhall.r@xxxxxxx> wrote:
> Hi,
>
>
>
> Is there a way, I can browse messages lying on a mosquitto server
> topic, using java, without removing them(non-destructive read)?
>
>
>
> Any help/pointer to the correct APi will be of great help
>
>
>
> Regards,
>
> Rohit Dhall
>
> Enterprise Architect, Technology Office-TFG, HCL Technologies
>
> +91-9811181701
>
>
>
> [image: tfg]
>
>
> ::DISCLAIMER:: The contents of this e-mail and any attachment(s) are
> confidential and intended for the named recipient(s) only. E-mail
> transmission is not guaranteed to be secure or error-free as
> information could be intercepted, corrupted, lost, destroyed, arrive
> late or incomplete, or may contain viruses in transmission. The e mail
> and its contents (with or without referred errors) shall therefore not
> attach any liability on the originator or HCL or its affiliates. Views
> or opinions, if any, presented in this email are solely those of the
> author and may not necessarily reflect the views or opinions of HCL or
> its affiliates. Any form of reproduction, dissemination, copying,
> disclosure, modification, distribution and / or publication of this
> message without the prior written consent of authorized representative
> of HCL is strictly prohibited. If you have received this email in
> error please delete it and notify the sender immediately. Before
> opening any email and/or attachments, please check them for viruses and
other defects..
>
> _______________________________________________
> paho-dev mailing list
> paho-dev@xxxxxxxxxxx
> To change your delivery options, retrieve your password, or
> unsubscribe from this list, visit
> https://dev.eclipse.org/mailman/listinfo/paho-dev
>
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------------------------------
Message: 2
Date: Mon, 8 Feb 2016 09:16:20 +0000
From: Kamil Baczkowicz <kamil.baczkowicz@xxxxxxxxx>
To: General development discussions for paho project
<paho-dev@xxxxxxxxxxx>
Subject: Re: [paho-dev] non-destructive read
Message-ID:
<CAHtMjFr928Do+uWSZoEqPq5UFrdd17ykoko+e1gwERrQ1emp-w@xxxxxxxxxxxxxx>
Content-Type: text/plain; charset="utf-8"
Hi,
What about creating a subscription for the relevant topic filter(s) and
QoS=0? Is that not any good?
Kamil
On Mon, Feb 8, 2016 at 8:42 AM, Rohit Dhall <dhall.r@xxxxxxx> wrote:
> Hi,
>
>
>
> Is there a way, I can browse messages lying on a mosquitto server
> topic, using java, without removing them(non-destructive read)?
>
>
>
> Any help/pointer to the correct APi will be of great help
>
>
>
> Regards,
>
> Rohit Dhall
>
> Enterprise Architect, Technology Office-TFG, HCL Technologies
>
> +91-9811181701
>
>
>
> [image: tfg]
>
>
> ::DISCLAIMER:: The contents of this e-mail and any attachment(s) are
> confidential and intended for the named recipient(s) only. E-mail
> transmission is not guaranteed to be secure or error-free as
> information could be intercepted, corrupted, lost, destroyed, arrive
> late or incomplete, or may contain viruses in transmission. The e mail
> and its contents (with or without referred errors) shall therefore not
> attach any liability on the originator or HCL or its affiliates. Views
> or opinions, if any, presented in this email are solely those of the
> author and may not necessarily reflect the views or opinions of HCL or
> its affiliates. Any form of reproduction, dissemination, copying,
> disclosure, modification, distribution and / or publication of this
> message without the prior written consent of authorized representative
> of HCL is strictly prohibited. If you have received this email in
> error please delete it and notify the sender immediately. Before
> opening any email and/or attachments, please check them for viruses and
other defects..
>
> _______________________________________________
> paho-dev mailing list
> paho-dev@xxxxxxxxxxx
> To change your delivery options, retrieve your password, or
> unsubscribe from this list, visit
> https://dev.eclipse.org/mailman/listinfo/paho-dev
>
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