51Degrees Device Detection Java  4.2

Device detection services for 51Degrees Pipeline


This example shows how to use the 51Degrees Cloud service to determine whether a given User-Agent corresponds to a mobile device or not.

This example is available in full on GitHub.

To run this example, you will need to create a resource key. The resource key is used as shorthand to store the particular set of properties you are interested in as well as any associated license keys that entitle you to increased request limits and/or paid-for properties.

You can create a resource key using the 51Degrees Configurator.

/* *********************************************************************
* This Original Work is copyright of 51 Degrees Mobile Experts Limited.
* Copyright 2019 51 Degrees Mobile Experts Limited, 5 Charlotte Close,
* Caversham, Reading, Berkshire, United Kingdom RG4 7BY.
* This Original Work is licensed under the European Union Public Licence (EUPL)
* v.1.2 and is subject to its terms as set out below.
* If a copy of the EUPL was not distributed with this file, You can obtain
* one at https://opensource.org/licenses/EUPL-1.2.
* The 'Compatible Licences' set out in the Appendix to the EUPL (as may be
* amended by the European Commission) shall be deemed incompatible for
* the purposes of the Work and the provisions of the compatibility
* clause in Article 5 of the EUPL shall not apply.
* If using the Work as, or as part of, a network application, by
* including the attribution notice(s) required under Article 5 of the EUPL
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package fiftyone.devicedetection.examples.cloud;
import fiftyone.devicedetection.DeviceDetectionPipelineBuilder;
import fiftyone.devicedetection.examples.ExampleBase;
import fiftyone.devicedetection.examples.ProgramBase;
import fiftyone.devicedetection.shared.DeviceData;
import fiftyone.pipeline.core.data.FlowData;
import fiftyone.pipeline.core.flowelements.Pipeline;
import fiftyone.pipeline.engines.data.AspectPropertyValue;
public class GettingStarted extends ProgramBase {
public static void main(String[] args) throws Exception {
String resourceKey = args.length > 0 ? args[0] :
// Obtain a resource key for free at https://configure.51degrees.com
// Make sure to include the 'IsMobile' property as it is used by this example.
new fiftyone.devicedetection.examples.cloud.GettingStarted.Example(true).run(resourceKey);
System.out.println("Complete. Press enter to exit.");
public static class Example extends ExampleBase {
private final String mobileUserAgent =
"Mozilla/5.0 (iPhone; CPU iPhone OS 7_1 like Mac OS X) " +
"AppleWebKit/537.51.2 (KHTML, like Gecko) Version/7.0 Mobile" +
"/11D167 Safari/9537.53";
public Example(boolean printOutput) {
public void run(String resourceKey) throws Exception {
if (resourceKey.startsWith("!!")) {
println("You need to create a resource key at " +
"https://configure.51degrees.com and paste it into this example.");
println("Make sure to include the 'IsMobile' " +
"property as it is used by this example.");
else {
println("Constructing pipeline with cloud engine " +
"with resource key: " + resourceKey);
// Build the device detection pipeline using the builder that comes with the
// fiftyone.devicedetection package and pass in the desired settings. Additional
// flow elements / engines can be added before the build() method is called if
// needed.
Pipeline pipeline = new DeviceDetectionPipelineBuilder()
// Obtain a resource key from https://configure.51degrees.com
// A pipeline can create a flow data element which is where
// evidence is added (for example from a device web request).
// This evidence is then processed by the pipeline through the
// flow data's `process()` method. A try-with-resource block
// MUST be used for the FlowData instance. This ensures that
// native resources created by the device detection engine are
// freed.
try (FlowData data = pipeline.createFlowData()) {
// Here is an example of a function that checks if a User-Agent is a mobile
// device. In some cases the IsMobile value is not meaningful so instead of
// returning a default, a .hasValue() check can be made.
AspectPropertyValue<Boolean> isMobile = data.get(DeviceData.class).getIsMobile();
if (isMobile.hasValue()) {
println("IsMobile: " + isMobile.getValue());
} else {
println("IsMobile: " + isMobile.getNoValueMessage());