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Hi ,
I need to implement a java extension to export infotable, it would be feasible if writing the data via FileRepository and download it and then delete it , but it's a little bit tedious.
Is it possible to return a servlet OutputStream ?
Regards,
Sean
Solved! Go to Solution.
Hi @seanccc, I think that is what ThingWorx is designed: FileRepository for dealing with the files.
However, if you are looking for exporting infotables, a plain service with output as infotable will do the trick.
You can get the information via RestAPIs.
If you also want to download it as a file, write the infotable into a CSV file, and set a constant 24h repeat clean timer or dynamically generate clean timers is another option.
The following codes generate a timer at runtime:
// create a timer
Resources["EntityServices"].CreateThing({
name: "newTimer" /* STRINGS, better to dynamically generate a name here, e.g., a hashed date */,
description: undefined /* STRING */,
thingTemplateName: "Timer" /* THINGTEMPLATENAME */,
tags: undefined /* TAGS */,
});
//get configuration table of the timer
var configuration = Things["newTimer"].GetConfigurationTable({
tableName: "Settings" /* STRING */
});
var row = configuration.getRow(0);
row.SetStringValue("updateRate", "300000"); // set updateRate here
row.SetBooleanValue("enabled", true); // enable this timer
row.SetStringValue("runAsUser", "Administrator"); // sets the user for this timer
//apply the configuration table
Things["newTimer"].SetConfigurationTable({
configurationTable: configuration /* INFOTABLE */,
persistent: true /* BOOLEAN */,
tableName: "Settings" /* STRING */
});
And don't forget to delete this timer in the subscription where you implement the "clean" logic:
Resources["EntityServices"].DeleteThing({
name: "newTimer"
});
@seanccc , I am not sure of the requirements of your project, have you considered the ThingWorx Market Place Extension CSV Parser? The extension has the a writeCSV service.
Good luck with your project
Peter
@PEHOWE ,
The CSV parser extension also write to the OutputStream of the file repository in ThingWorx server , instead of the OutputStream of the servlet's http reponse. I has to delete the file after downloading , and maybe it's not possible to know when the download has finished and need another cleaner timer job.
So I want to know if I can write the byte array of the excel/csv file into ServletHttpReponse directly in Java extension ? In this way I don't need to delete the file as no file is generated .
Regards,
Sean
Hi @seanccc, I think that is what ThingWorx is designed: FileRepository for dealing with the files.
However, if you are looking for exporting infotables, a plain service with output as infotable will do the trick.
You can get the information via RestAPIs.
If you also want to download it as a file, write the infotable into a CSV file, and set a constant 24h repeat clean timer or dynamically generate clean timers is another option.
The following codes generate a timer at runtime:
// create a timer
Resources["EntityServices"].CreateThing({
name: "newTimer" /* STRINGS, better to dynamically generate a name here, e.g., a hashed date */,
description: undefined /* STRING */,
thingTemplateName: "Timer" /* THINGTEMPLATENAME */,
tags: undefined /* TAGS */,
});
//get configuration table of the timer
var configuration = Things["newTimer"].GetConfigurationTable({
tableName: "Settings" /* STRING */
});
var row = configuration.getRow(0);
row.SetStringValue("updateRate", "300000"); // set updateRate here
row.SetBooleanValue("enabled", true); // enable this timer
row.SetStringValue("runAsUser", "Administrator"); // sets the user for this timer
//apply the configuration table
Things["newTimer"].SetConfigurationTable({
configurationTable: configuration /* INFOTABLE */,
persistent: true /* BOOLEAN */,
tableName: "Settings" /* STRING */
});
And don't forget to delete this timer in the subscription where you implement the "clean" logic:
Resources["EntityServices"].DeleteThing({
name: "newTimer"
});