51Degrees Device Detection Java  4.4

Device detection services for 51Degrees Pipeline


This example is available in full on GitHub.

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package fiftyone.devicedetection.examples.console;
import fiftyone.devicedetection.examples.shared.DataFileHelper;
import fiftyone.devicedetection.examples.shared.EvidenceHelper;
import fiftyone.devicedetection.hash.engine.onpremise.flowelements.DeviceDetectionHashEngine;
import fiftyone.devicedetection.shared.DeviceData;
import fiftyone.pipeline.core.configuration.PipelineOptions;
import fiftyone.pipeline.core.configuration.PipelineOptionsFactory;
import fiftyone.pipeline.core.data.FlowData;
import fiftyone.pipeline.core.flowelements.Pipeline;
import fiftyone.pipeline.engines.fiftyone.flowelements.FiftyOnePipelineBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.List;
import java.util.Map;
import static fiftyone.common.testhelpers.LogbackHelper.configureLogback;
import static fiftyone.devicedetection.examples.shared.PropertyHelper.asString;
import static fiftyone.pipeline.util.FileFinder.getFilePath;
public class GettingStartedOnPrem {
private static final Logger logger = LoggerFactory.getLogger(GettingStartedOnPrem.class);
/* In this example, by default, the 51degrees "Lite" file needs to be somewhere in the project
space, or you may specify another file as a command line parameter.
Note that the Lite data file is only used for illustration, and has limited accuracy and
capabilities. Find out about the Enterprise data file here: https://51degrees.com/pricing */
public static String LITE_V_4_1_HASH = "51Degrees-LiteV4.1.hash";
public static void main(String[] args) throws Exception {
String dataFile = args.length > 0 ? args[0] : LITE_V_4_1_HASH;
// prepare 'evidence' for use in pipeline (see below)
List<Map<String, String>> evidence = EvidenceHelper.setUpEvidence();
run(dataFile, evidence, System.out);
public static void run(String dataFile,
List<Map<String, String>> evidenceList,
OutputStream outputStream) throws Exception {
logger.info("Running GettingStarted example");
try {
String dataFileLocation = getFilePath(dataFile).getAbsolutePath();
// the location of the test data file is interpolated in the pipeline
// configuration file
System.setProperty("TestDataFile", dataFileLocation);
} catch (Exception e) {
throw e;
/* In this example, we use the DeviceDetectionPipelineBuilder and configure it from
options contained in the file "gettingStartedOnPrem.xml".
For more information about pipelines in general see the documentation at
Note that we wrap the creation of a pipeline in a try/resources to control its lifecycle */
// the configuration file is in the resources directory
File optionsFile = getFilePath("gettingStartedOnPrem.xml");
// load the options and if no resource key has been set in the file
// use the one supplied to this method
PipelineOptions pipelineOptions = PipelineOptionsFactory.getOptionsFromFile(optionsFile);
// Build a new Pipeline from the configuration.
try (Pipeline pipeline = new FiftyOnePipelineBuilder()
.buildFromConfiguration(pipelineOptions)) {
// carry out some sample detections
for (Map<String, String> evidence : evidenceList) {
analyzeEvidence(evidence, pipeline, outputStream);
/* Get the 'engine' element within the pipeline that performs device detection. We
can use this to get details about the data file as well as meta-data describing
things such as the available properties. */
DeviceDetectionHashEngine engine = pipeline.getElement(DeviceDetectionHashEngine.class);
logger.info("All done");
private static void analyzeEvidence(Map<String, String> evidence,
Pipeline pipeline,
OutputStream out) throws Exception {
PrintWriter writer = new PrintWriter(out);
/* FlowData is a data structure that is used to convey information required for detection
and the results of the detection through the pipeline. Information required for
detection is called "evidence" and usually consists of a number of HTTP Header field
values, in this case represented by a Map<String, String> of header name/value entries.
FlowData is wrapped in a try/resources block in order to ensure that the unmanaged
resources allocated by the native device detection library are freed */
try (FlowData data = pipeline.createFlowData()) {
// list the evidence
writer.println("Input values:");
for (Map.Entry<String, String> entry : evidence.entrySet()) {
writer.format("\t%s: %s\n", entry.getKey(), entry.getValue());
// Add the evidence values to the flow data
// Process the flow data.
/* Now that it has been processed, the flow data will have been populated with the result.
In this case, we want information about the device, which we can get by asking for a
result matching the "DeviceData" interface. */
DeviceData device = data.get(DeviceData.class);
/* Display the results of the detection, which are called device properties. See the
property dictionary at https://51degrees.com/developers/property-dictionary for
details of all available properties. */
writer.println("\tMobile Device: " + asString(device.getIsMobile()));
writer.println("\tPlatform Name: " + asString(device.getPlatformName()));
writer.println("\tPlatform Version: " + asString(device.getPlatformVersion()));
writer.println("\tBrowser Name: " + asString(device.getBrowserName()));
writer.println("\tBrowser Version: " + asString(device.getBrowserVersion()));