Java 8 has reached end of support and will be deprecated on January 31, 2026. After deprecation, you won't be able to deploy Java 8 applications, even if your organization previously used an organization policy to re-enable deployments of legacy runtimes. Your existing Java 8 applications will continue to run and receive traffic after their deprecation date. We recommend that you migrate to the latest supported version of Java.

LocalTaskQueueCallback

All Superinterfaces:

java.io.Serializable

All Known Implementing Classes:

LocalTaskQueueTestConfig.DeferredTaskCallback, LocalTaskQueueTestConfig.ServletInvokingTaskCallback
```
public interface LocalTaskQueueCallback
extends java.io.Serializable
```
A callback that is asynchronously invoked by the local Task Queue. Even though the interface is defined in terms of a url fetch and its response, implementors are free to execute the request in any way they see fit.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`int`	`execute(URLFetchServicePb.URLFetchRequest req)` Execute the provided url fetch request.
`void`	`initialize(java.util.Map<java.lang.String,java.lang.String> properties)` This method will be invoked from `LocalTaskQueue#init(com.google.appengine.tools.development.LocalServiceContext, Map)` forwarding the `properties` parameter.

- Method Detail
  - initialize
```
void initialize(java.util.Map<java.lang.String,java.lang.String> properties)
```
    This method will be invoked from LocalTaskQueue#init(com.google.appengine.tools.development.LocalServiceContext, Map) forwarding the properties parameter.
  - execute
```
int execute(URLFetchServicePb.URLFetchRequest req)
```
    Execute the provided url fetch request.
    
    Parameters:
    
    req - The url fetch request
    
    Returns:
    
    The HTTP status code of the fetch.

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2025-06-16 UTC.

LocalTaskQueueCallback

Interface LocalTaskQueueCallback

Method Summary

Method Detail

initialize

execute