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I am trying to run an azure function that I wrote in Java locally using func start. This doesn't work and this is the error message that I'm getting:

`PS C:\Users\UserName\Pictures\PowerPages\styringsgruppen-powerpages-site\Java\vscode> func start

Azure Functions Core Tools Core Tools Version: 4.0.6610 Commit hash: N/A +0d55b5d7efe83d85d2b5c6e0b0a9c1b213e96256 (64-bit) Function Runtime Version: 4.1036.1.23224

[2025-01-07T13:56:37.775Z] No job functions found. Try making your job classes and methods public. If you're using binding extensions (e.g. Azure Storage, ServiceBus, Timers, etc.) make sure you've called the registration method for the extension(s) in your startup code (e.g. builder.AddAzureStorage(), builder.AddServiceBus(), builder.AddTimers(), etc.). For detailed output, run func with --verbose flag. [2025-01-07T13:56:43.088Z] Host lock lease acquired by instance ID '000000000000000000000000618D1A8C'.`

The class I'm trying to run is public and the method inside is also public, so this shouldn't be the issue. The error about binding extensions shouldn't be a problem either since I'm not using any startup code in my program. If anyone could help me with this, please respond, any feedback is appreciated.

I am trying to run an azure function that I wrote in Java locally using func start. This doesn't work and this is the error message that I'm getting:

`PS C:\Users\UserName\Pictures\PowerPages\styringsgruppen-powerpages-site\Java\vscode> func start

Azure Functions Core Tools Core Tools Version: 4.0.6610 Commit hash: N/A +0d55b5d7efe83d85d2b5c6e0b0a9c1b213e96256 (64-bit) Function Runtime Version: 4.1036.1.23224

[2025-01-07T13:56:37.775Z] No job functions found. Try making your job classes and methods public. If you're using binding extensions (e.g. Azure Storage, ServiceBus, Timers, etc.) make sure you've called the registration method for the extension(s) in your startup code (e.g. builder.AddAzureStorage(), builder.AddServiceBus(), builder.AddTimers(), etc.). For detailed output, run func with --verbose flag. [2025-01-07T13:56:43.088Z] Host lock lease acquired by instance ID '000000000000000000000000618D1A8C'.`

The class I'm trying to run is public and the method inside is also public, so this shouldn't be the issue. The error about binding extensions shouldn't be a problem either since I'm not using any startup code in my program. If anyone could help me with this, please respond, any feedback is appreciated.

• java
• azure

Share Improve this question Follow asked 2 days ago AdmirAdmir 122 bronze badges 5

• Add @FunctionName to your method and run mvn clean package before func start. Can you share your code in the question? – Dasari Kamali Commented yesterday
• Have you checked if the storage connection string is correct? – Dasari Kamali Commented yesterday
• You can use mvn azure-functions:run to run your Java function locally. Refer this MS DOC for more details. – Dasari Kamali Commented yesterday
• 1 Yes, here's the code: gist.github.com/admirl5595/f44a91076082b8c239130f97bc9ee378 – Admir Commented yesterday
• Try with the mvn azure-functions:run command to run the function. – Dasari Kamali Commented yesterday

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2 Answers 2

Sorted by: Reset to default 0

please find below to step by step guide to run a java function app. there are some steps required to setup env and project in vs code. you can run cmd to launch the function app but ideally you would like to run it directly in vs code for debugging etc.

https://learn.microsoft.com/en-us/azure/azure-functions/create-first-function-cli-java?tabs=windows%2Cbash%2Cazure-cli%2Cbrowser

https://learn.microsoft.com/en-us/azure/azure-functions/create-first-function-vs-code-java

To run an HTTP trigger function in Java locally, you can use the command mvn azure-functions:run.

I tried your code, ran it using the above command, and it worked fine for me.

Sales.java :

import com.microsoft.azure.functions.annotation.*;
import com.microsoft.azure.functions.*;
import java.sql.*;
import java.util.*;
import java.util.logging.Logger;

public class Sales {
    @FunctionName("Sales")
    public HttpResponseMessage run(
            @HttpTrigger(name = "req", methods = {HttpMethod.POST}, authLevel = AuthorizationLevel.ANONYMOUS)
            HttpRequestMessage<Optional<String>> request,
            final ExecutionContext context) {

        Logger logger = context.getLogger();
        logger.info("Processing a request in Sales function.");
        String formBody = request.getBody().orElse("");
        FormParser formParser = new FormParser(formBody);

        String url = "jdbc:sqlserver://<sqlServerName>.database.windows.net:1433;database=<dbName>;encrypt=true;trustServerCertificate=false;hostNameInCertificate=*.database.windows.net;loginTimeout=30";
        String username = "<userName>";
        String password = "<Password>";

        try (Connection connection = DriverManager.getConnection(url, username, password)) {
            logger.info("Database connection successful.");

            String query = "EXEC AddSale @product_name=?, @production_cost=?, @price=?, @units_sold=?, @profit=?, @date=?, @month_number=?, @year=?, @indirect_costs=?";
            PreparedStatement preparedStatement = connection.prepareStatement(query);

            preparedStatement.setString(1, formParser.getProductName());
            preparedStatement.setInt(2, formParser.getProductionCost());
            preparedStatement.setFloat(3, formParser.getPrice());
            preparedStatement.setInt(4, formParser.getUnitsSold());
            preparedStatement.setFloat(5, formParser.getProfit());
            preparedStatement.setString(6, formParser.getDate());
            preparedStatement.setInt(7, formParser.getMonthNumber());
            preparedStatement.setInt(8, formParser.getYear());
            preparedStatement.setFloat(9, formParser.getIndirectCosts());

            preparedStatement.executeUpdate();
            logger.info("Stored procedure executed successfully.");
        } catch (SQLException e) {
            logger.severe("SQL exception: " + e.getMessage());
            return request.createResponseBuilder(HttpStatus.INTERNAL_SERVER_ERROR)
                    .body("Error processing request: " + e.getMessage())
                    .build();
        }

        return request.createResponseBuilder(HttpStatus.OK)
                .body("Sales data processed successfully.")
                .build();
    }
}

FormParser.java :

public class FormParser {
    private String productName;
    private int productionCost;
    private float price;
    private int unitsSold;
    private float profit;
    private String date;
    private int monthNumber;
    private int year;
    private float indirectCosts;

    public FormParser(String formBody) {
        this.productName = "SampleProduct";
        this.productionCost = 100;
        this.price = 150.5f;
        this.unitsSold = 10;
        this.profit = 500.0f;
        this.date = "2025-01-10";
        this.monthNumber = 1;
        this.year = 2025;
        this.indirectCosts = 50.0f;
    }

    public String getProductName() { return productName; }
    public int getProductionCost() { return productionCost; }
    public float getPrice() { return price; }
    public int getUnitsSold() { return unitsSold; }
    public float getProfit() { return profit; }
    public String getDate() { return date; }
    public int getMonthNumber() { return monthNumber; }
    public int getYear() { return year; }
    public float getIndirectCosts() { return indirectCosts; }
}

local.settings.json :

{
  "IsEncrypted": false,
  "Values": {
    "AzureWebJobsStorage": "<storageConnectString>",
    "FUNCTIONS_WORKER_RUNTIME": "java"
  }
}

pom.xml :

<dependency>
    <groupId>com.microsoft.sqlserver</groupId>
    <artifactId>mssql-jdbc</artifactId>
    <version>12.2.0.jre11</version>
</dependency>

Terminal Output :

mvn clean install
mvn clean package
mvn azure-functions:run 

I successfully sent the POST request for the above HTTP trigger function.

http://localhost:7071/api/Sales

I got the following logs after sending the POST request.

Azure SQL db data :

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