project-flogo/developers

Dev focused conversations, questions and discussions around PRs, etc should happen here.

Andy Hampshire

@ayh20

@retgits :clap: :raised_hands: awesome !

Reid Lai

@reidlai

Samip Kothari

@skothari-tibco

@reidlai hello.

1 reply

Leon Stigter

@retgits

Hiii 👋👋

PricelessRabbit

@PricelessRabbit

Hi all. I ask a few question about flogo ecosystem in the Lobby channel. Hope it's the right place :)

avinashkrishna613

@avinashkrishna613

This message was deleted

48 replies

Tracy Li

@lixingwang

@avinashkrishna613 check here to see if any activities can help u. https://tibcosoftware.github.io/flogo/showcases/. It has write file.

Caynan Sousa

@caynan

Hey folks I was wondering how Flogo handle server failures? I mean what would happen if a given Flogo process fails while processing flows? Is there any persistence layer that the process can use to restart from?

1 reply

Tracy Li

@lixingwang

@caynan we don’t have this feature available today. But it is good feature and we are planing to do.

Caynan Sousa

@caynan

hi @lixingwang do you have any issue for that? I would love to keep an eye on the current progress for this feature, and maybe even help implement it. The ability to flawlessly restart a service is what is stopping us from using Flogo.

Tracy Li

@lixingwang

@caynan No issue in GITHUB yet. Could you please create one? thanks.

Matt Ellis

@mellistibco

@caynan we’d love for you to help implement it :smile: we do have a state service that could potentially be enhanced. Will create an issue to track it and we can use that to collaborate

Tracy Li

@lixingwang

Yes, we do have a state server that can do this kind of work but we need to enhance it to have a persistence layer. Once we have persistence then we can load failed flow instances and restart/rerun it.

Milos Veljkovic

@milosveljkovic

Any suggestion for solving this error: Post http://localhost:5000/api/arduino/sendData: dial tcp 127.0.0.1:5000: connect: connection refused
I try to do REST(Post) from FLOGO to Asp.Net core ... any ideas?

1 reply

ShaliniGovindaNayak

@shaliniGovindaNayak

Hai I am exporting a windows build from the flogo web , when I am trying to do that i keep getting the following error on cmd pmt could any one help me solve this issue
'''
info: [16:54:43.609] run command: flogo build -o -e
warn: [16:54:48.006] command exited with code 1: flogo build -o -e
error: [16:54:48.007] Error building project: go: finding github.com/StackExchange/wmi latest
go: finding github.com/go-ole/go-ole/oleutil latest

github.com/shirou/gopsutil/process

/go/pkg/mod/github.com/shirou/gopsutil@v2.20.9+incompatible/process/process_windows.go:184:13: undefined: "golang.org/x/sys/windows".EnumProcesses
/go/pkg/mod/github.com/shirou/gopsutil@v2.20.9+incompatible/process/process_windows.go:222:32: undefined: "golang.org/x/sys/windows".PROCESS_QUERY_LIMITED_INFORMATION
/go/pkg/mod/github.com/shirou/gopsutil@v2.20.9+incompatible/process/process_windows.go:271:32: undefined: "golang.org/x/sys/windows".PROCESS_QUERY_LIMITED_INFORMATION
/go/pkg/mod/github.com/shirou/gopsutil@v2.20.9+incompatible/process/process_windows.go:374:32: undefined: "golang.org/x/sys/windows".PROCESS_QUERY_LIMITED_INFORMATION
/go/pkg/mod/github.com/shirou/gopsutil@v2.20.9+incompatible/process/process_windows.go:443:32: undefined: "golang.org/x/sys/windows".PROCESS_QUERY_LIMITED_INFORMATION
/go/pkg/mod/github.com/shirou/gopsutil@v2.20.9+incompatible/process/process_windows.go:489:32: undefined: "golang.org/x/sys/windows".PROCESS_QUERY_LIMITED_INFORMATION
/go/pkg/mod/github.com/shirou/gopsutil@v2.20.9+incompatible/process/process_windows.go:692:32: undefined: "golang.org/x/sys/windows".PROCESS_SUSPEND_RESUME
/go/pkg/mod/github.com/shirou/gopsutil@v2.20.9+incompatible/process/process_windows.go:712:32: undefined: "golang.org/x/sys/windows".PROCESS_SUSPEND_RESUME
/go/pkg/mod/github.com/shirou/gopsutil@v2.20.9+incompatible/process/process_windows.go:800:32: undefined: "golang.org/x/sys/windows".PROCESS_QUERY_LIMITED_INFORMATION
/go/pkg/mod/github.com/shirou/gopsutil@v2.20.9+incompatible/process/process_windows.go:815:32: undefined: "golang.org/x/sys/windows".PROCESS_QUERY_LIMITED_INFORMATION
/go/pkg/mod/github.com/shirou/gopsutil@v2.20.9+incompatible/process/process_windows.go:815:32: too many errors
'''

Fabián Castillo

@fcastill

The code in that repo where the error is thrown ( https://github.com/shirou/gopsutil/blob/d9f9a85e75b41b9555783b2eee705daf7f3a9b43/process/process_windows.go ) is trying to run APIs that are specific to windows during build/compilation process and it fails because the Flogo Web docker image is running inside a linux environment

In the wmi library's GH issues someone had a similar issue StackExchange/wmi#31 although it's from 2017, it might help. The Flogo Web server is setting the GOOS=windows GOARCH=amd64 env variables when you select the windows/amd64 option in the Web UI.

You can also share a flogo.json that reproduces the error and I can play with it and see if I can make it work on my side

ShaliniGovindaNayak

@shaliniGovindaNayak

gethardwareDetails.json

sure attaching the flogo.json

ShaliniGovindaNayak

@shaliniGovindaNayak

gethardwareDetails.json

Fabián Castillo

@fcastill

I was able to build that json without errors in my machine (mac OS) using GOOS=windows GOARCH=amd64 flogo build (golang v1.15) but I was not able to make it work inside the docker container. I created a Dockerfile that only installs flogo CLI directly on top of go's official docker image (golang) and I get the same errors. So there's some incompatibility in the github.com/shirou/gopsutil lib with golang's image (which is built on top of debian) or perhaps there's an additional library that has to be installed in the docker image in order to enable the cross compilation to windows/amd64

Dockerfile

Akash Mahapatra

@Ganitagya

Is there a way to use external go code in Flogo apps? Something similar to JAVA, where we provide the path to a jar. Let's say, I have a functional go-code ready. Can I use it in a Flogo app without creating a custom activity? @mellistibco

Andy Hampshire

@ayh20

@Ganitagya You have to wrapper the code to use is as a function or an activity, I've had to do the same myself, it's only a few lines but the wrapper tells flogo the interface and the usage.

3 replies

Tracy Li

@lixingwang

@Ganitagya BTW, this feature supported by flogo enterprise :)

Frank Cohen

@frankcohen

Hi Flogoistas, I'm working on an IoT project - it's a wrist watch. I'm using an ESP32. I need to send short messages from the device to a Web server. Users will have an IoS or Android device with Internet connectivity. I am thinking of using BLE to keep power requirements low. Flogo would be a great transport. Is there a project to develop Flogo for ESP32?

Ihab

@ihabbishara

Hi All,
I've create d custom function in GO, and followed all steps, tested with (_test) file, all seems good.
Zipped it, and added to the Extensions and seems loaded nicely.

Then in Flogo flow, i've create simple LOG with the New Function which appears in the function list.
All good up to here, when i run the TEST in flogo i get the following:

error --> "Gathering contribution data failed"

Tracy Li

@lixingwang

@ihabbishara The go.mod name must be the function category name. I had shared one with you please have a look

Ray Hindman

@rayhindman_gitlab

Can anyone provide guidance on best practices, security and quality scanning tooling such as SonarQube ?

5 replies

Davor Sauer

@d-sauer

Hi all.. could someone give me bit a hint as I’m aiming to create flogo cli plugin, and first I started with example provided in flogo cli.
Anyhow when I want to install plugin (not published to public GitHub), I’m getting following:

6 replies

Samip Kothari

@skothari-tibco

This message was deleted

ShaliniGovindaNayak

@shaliniGovindaNayak

Hai all.. I am trying to build a flogo activity ,could anyone help me with the below "error.undeclared name: Input compiler" screen shot attached : https://lh3.googleusercontent.com/cJsC7IDkmdn-T6uGtIZmtjIF9kDOgyCKQ_RVkLgr0oPvvnaF1bGUXSkvVy6YZAe51kbOrfCs3W8OppFeiy5vOKJqNmlXmo6PbyWMBhpnED0_l6ILFaQ4eJPPJr5QBsqVPKPRrOFCX4dvFtcznlzg_wbV1j2RTGisGqi8IQN7OstNquxsEUP7B4aEOHB76SRxvktznQW0NBQRaqiynpIRiX6eczckm4VWL30igw=w1920-h918

1 reply

ShaliniGovindaNayak

@shaliniGovindaNayak

2 replies

AndreasHeissenberger

@AHeissenberger_twitter

Hi 😁 what kind of data structure is expected by the "Run Stream" CSV Upload for e.g. the simple filter streams example? Thanks

Matt Ellis

@mellistibco

A csv file :smile: the header row maps to the field names when mapping

AndreasHeissenberger

@AHeissenberger_twitter

The stream interface has on field. Name: "input" Type: "integer" my CSV has one column with header "input" and one number per line (UTF-8, NL) and I get this error msg in the log:
May 6, 2021 16:28:12.209
2021-05-06T14:28:12.174Z INFO [flogo.engine] - Application Started
May 6, 2021 16:28:12.209
2021-05-06T14:28:12.174Z INFO [flogo.engine] - Engine Started
May 6, 2021 16:28:12.209
2021-05-06T14:28:12.177Z INFO [flogo.flow-state] - Listening on http://0.0.0.0:9190
May 6, 2021 16:28:12.209
2021-05-06T14:28:12.177Z INFO [flogo.trigger.streamtester] - Listening on http://:9998
May 6, 2021 16:28:13.682
2021-05-06T14:28:13.680Z DEBUG [flogo.trigger.streamtester] - Trigger Output: &streamtester.Output{Data:map[string]interface {}{"2":3}, ColumnNames:[]interface {}(nil)}
May 6, 2021 16:28:13.683
2021-05-06T14:28:13.680Z ERROR [flogo.trigger.streamtester] - Error while executing handler: &errors.errorString{s:"unable to coerce map[string]interface {}{\"2\":3} to int"}
May 6, 2021 16:28:13.683
github.com/project-flogo/core/support/log.(*zapLoggerImpl).Errorf
May 6, 2021 16:28:13.683
/go/pkg/mod/github.com/project-flogo/core@v1.0.0/support/log/zap.go:65
May 6, 2021 16:28:13.683
github.com/project-flogo/stream/trigger/streamtester.(*Emitter).Run.func1
May 6, 2021 16:28:13.683
/go/pkg/mod/github.com/project-flogo/stream/trigger/streamtester@v0.0.0-20200124014152-d2d7c82a602d/emitter.go:115

Matt Ellis

@mellistibco

@fcastill do you happen to know off the top of your head? I’m not at a computer atm otherwise would check

AndreasHeissenberger

@AHeissenberger_twitter

@mellistibco thanks for your quick reply - I got it working - the solution is to switch the stream interface into type object - this is what the Web UI "Run Stream" creates from a CSV
input
1
2
=>
{"input",1}
{"input",2}

Asadullah Farooqi

@afarooqi8

hi i have a question, to implement a flogo trigger I can use the flogogen tool(which is mentioned in the docs) which is the old 0.5.6 version. where currently the Flogo on project-flogo github is using 0.9 version! which one should I use? and the new version 0.9 doesn't support the triggers creation

i compared the triggers from project-flogo github and TIBCO flogo github they are different their code structure is very different, the TIBCO uses flogo-lib where the project-flogo uses core, I am just curious which one should I use and if I should use the 0.9 one then how can I use that for the triggers

Matt Ellis

@mellistibco

@afarooqi8 you should be using everything inside the project-flogo org

skothari12

@skothari12

https://github.com/project-flogo/cli-plugins/tree/master/devtool . This gen tool should create trigger compatible with 0.9 + .

Asadullah Farooqi

@afarooqi8

thanks guys

Asadullah Farooqi

@afarooqi8

can you guys give me a hint how will this process take place?

I can't think of extration of vars from json events

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github.com/shirou/gopsutil/process