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Tutorials & examples

Table of Contents

Tutorials

NAE CE Starter Application Initialization

*all importnat links in the video description

RUN YOUR OWN NAE
TRY DEMO APP

Examples

Generic request application

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Generic request application with custom WS

Custom Web Service code snippet

import javax.net.ssl.HttpsURLConnection
import groovy.json.JsonSlurper

def randomPerson(def name, def surname, def email){
   URL url = new URL("https://randomuser.me/api/");
   HttpsURLConnection con = (HttpsURLConnection) url.openConnection();
   con.setRequestMethod("GET");
   int status = con.getResponseCode();
   Reader streamReader = null;
   if (status > 299) {
   streamReader = new InputStreamReader(con.getErrorStream());
 } else {
   streamReader = new InputStreamReader(con.getInputStream());
 }
   def json = new JsonSlurper()
   def object = json.parseText(streamReader.text)
   change name value { object.results.get(0).get("name").get("first") }
   change surname value { object.results.get(0).get("name").get("last") }
   change email value { object.results.get(0).get("email") }
}


Runner code snippet

import com.netgrif.application.engine.auth.domain.*
import com.netgrif.application.engine.petrinet.domain.roles.ProcessRole
import com.netgrif.application.engine.auth.service.interfaces.IUserService

    @Autowired
    private IUserService userService

    @Override
    void run(String... args) throws Exception {
        log.info("Calling custom runner");

        userService.saveNew(new User(
                name: "User",
                surname: "Test",
                email: "test@netgrif.com",
                password: "password",
                state: UserState.ACTIVE,
                authorities: [] as Set,
                processRoles: [] as Set))
    }
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Mortgage application

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List of elements

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Generate PDF from form in process list

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Import CSV as cases

CSV pom dependency

<!--CSV pom-->
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-csv</artifactId>
    <version>1.6</version>
</dependency>


CSV parser code snippet

import org.apache.commons.csv.*

void importCSVFile(FileField file, String net, List fields){
try{
        def stream = new FileInputStream(new File(file.value.path))
        CSVParser parser = CSVParser.parse(stream, Charset.forName("UTF-8"), CSVFormat.EXCEL.withDelimiter(',' as char))

        for (CSVRecord record in parser.iterator()) {
            def cas = createCase(net, record[0])
            fields.eachWithIndex { String entry, int i ->
                cas.getDataField(entry).setValue(record[i])
            }
            workflowService.save(cas)
        }
    } catch (Exception e) {
        log.error("Import CSV File error", e)
    }
}
CSV File
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Export CSV from cases

*this example follows funcionality created in example: Import CSV as cases

CSV export code snippet

import com.netgrif.application.engine.petrinet.domain.dataset.FileField
import com.netgrif.application.engine.workflow.domain.QCase
import com.netgrif.application.engine.workflow.domain.Case

def exportCSVFile(String net, List fields) throws IOException {
        File csvOutputFile = new File("storage/" + useCase.stringId + "_csv_file.csv")
        FileWriter writer = new FileWriter(csvOutputFile);
        workflowService.searchAll(QCase.case$.processIdentifier.eq(net)).eachWithIndex{ Case ca, int i ->
            writer.write(i.toString() + ",")
            fields.each{
                if(ca.getFieldValue(it) != null)
                    writer.write(escapeSpecialCharacters(ca.getFieldValue(it).toString()) + ",")
                else
                    writer.write(",")
            }
            writer.write(System.lineSeparator())
        }
        return new FileFieldValue(csvOutputFile.name,csvOutputFile.path)
    }

    String escapeSpecialCharacters(String data) {
        String escapedData = data.replaceAll("\\R", " ")
        if (data.contains(",") || data.contains("\"") || data.contains("'")) {
            data = data.replace("\"", "\"\"")
            escapedData = "\"" + data + "\""
        }
        return escapedData;
    }
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