Is there any Java example in DSS REST API, which can do on demand extraction by using pre-defined...

DSS REST doesn't provide Java Wrapper library like the REST C# library. However, there are Java examples demonstrate how to use HTTP requests. You can download the DSS Rest Java Code examples from DSS Rest Download tag and modify the extraction fields in the LegalEntityDetailReport examples.

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The sample under the downloads tab has been updated today.

Additional details to Susana's answer:

To create a schedule you need the instrumentListId and reportTemplateId. Code referring to manually created instrument list "myInstrumentListName" & report template "myReportTemplateName" can easily retrieve the respective IDs by name. See how to below (Java, HTTP REST and C#).

Java: see attached code (it is Susana's code with 2 added methods).

HTTP REST:

HTTP GET request by Instrument List name:

https://hosted.datascopeapi.reuters.com/RestApi/v1/Extractions/InstrumentListGetByName(ListName='myInstrumentListName')

HTTP response:

Location: https://hosted.datascopeapi.reuters.com/RestApi/v1/Extractions/InstrumentLists('')
{
	"@odata.context": "https://hosted.datascopeapi.reuters.com/RestApi/v1/$metadata#InstrumentLists/$entity",
	"ListId": "0x054a3d8c310afc5b",
	"Name": "myInstrumentListName",
	... (etc.)
}

HTTP GET request by Report Template name:

https://hosted.datascopeapi.reuters.com/RestApi/v1/Extractions/ReportTemplateGetByName(Name='myReportTemplateName')

HTTP response:

{
	"@odata.context": "https://hosted.datascopeapi.reuters.com/RestApi/v1/$metadata#ReportTemplates/ThomsonReuters.Dss.Api.Extractions.ReportTemplates.EndOfDayPricingReportTemplate/$entity",
	"@odata.type": "#ThomsonReuters.Dss.Api.Extractions.ReportTemplates.EndOfDayPricingReportTemplate",
	"ReportTemplateId": "0x054a3dc609e52703",
	... (etc.)
}<br>

C# using the .Net SDK:

myInstrumentList = extractionsContext.InstrumentListOperations.GetByName("myInstrumentListName");
myInstrumentListId = myInstrumentList.ListId;

myReportTemplate = extractionsContext.ReportTemplateOperations.GetByName("myReportTemplateName");
myReportTemplateId = myReportTemplate.ReportTemplateId;<br>