Develop Reference

How to use extensions in OpenTelemetry java

I am trying to extend OpenTelemetry java agent and I don't see any indication it is trying to load my jar.
I am running the following cmd:
java -javaagent:../src/main/resources/opentelemetry-javaagent.jar -Dotel.javaagent.configuration-file=../src/main/resources/agent-prp.properties -jar simple-service-1.0-SNAPSHOT-jar-with-dependencies.jar
my config file is (the attributes are working):
otel.javaagent.extensions=/Users/foo/source/simple-service/src/main/resources/span-processor-1.0-SNAPSHOT.jar
otel.resource.attributes=service.name=foooBarr
my extension is:
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import io.opentelemetry.context.Context;
import io.opentelemetry.sdk.common.CompletableResultCode;
import io.opentelemetry.sdk.trace.ReadWriteSpan;
import io.opentelemetry.sdk.trace.ReadableSpan;
import io.opentelemetry.sdk.trace.SpanProcessor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
public class FooSpanProcessor implements SpanProcessor {
private static final ObjectMapper objMapper = new ObjectMapper();
private static final Logger log = LoggerFactory.getLogger(FooSpanProcessor.class);
#Override
public void onStart(Context parentContext, ReadWriteSpan span) {
log.error("fffffffffff");
span.setAttribute("fooToken", FooProperties.INSTANCE.fooToken);
span.setAttribute("service.name", FooProperties.INSTANCE.serviceName);
span.setAttribute("runtime", FooProperties.INSTANCE.javaVersion);
span.setAttribute("tracerVersion", "0.0.1");
span.setAttribute("framework", FooProperties.INSTANCE.frameWork);
span.setAttribute("envs", FooProperties.INSTANCE.environment);
span.setAttribute("metaData", FooProperties.INSTANCE.metadata);
}
#Override
public boolean isStartRequired() {
return true;
}
#Override
public void onEnd(ReadableSpan span) {
}
....
I don't see any indication that my extension is loaded, I don't see any of my parameters on the produced spans. can any body help me?

"otel.javaagent.extensions" is not supported in the config file. add it with -D.
add the span processor to a config call implementing sdkTracerProviderConfigurer

How can i connect to the github enterprise repository through java code?

I want to know how can i get the list of all the repositories present in my github enterprise(private). I am unable to identify how should i use my personal access token to get authentication through java code.
I have already tried with public repositories and i am able to use everything in that but i am unable to do this with my enterprise github.
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Scanner;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;
import org.apache.commons.codec.binary.Base64;
public class httpget {
public static void main(String args[]) throws IOException, ParseException,JSONException
{
URL url=new URL("https://github---.com/api/v3/...");
HttpURLConnection conn=(HttpURLConnection)url.openConnection();
String token = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
String authString="Basic"+Base64.encodeBase64(token.getBytes());
conn.setRequestProperty("Authorization", authString);
conn.connect();
String inline="";
Scanner sc = new Scanner(url.openStream());
while(sc.hasNext())
{
inline+=sc.nextLine();
}
sc.close();
System.out.println(inline);
}
}

Best way do do that in java without the burden of rest authent is to use one of the Java API available.
This github page list all the APIs :
https://developer.github.com/v3/libraries/
And you have 2 java intersting API:
egit-github : https://github.com/eclipse/egit-github/tree/master/org.eclipse.egit.github.core
and
kohsuke : http://github-api.kohsuke.org/
egit-github seems quite easy to work with...

how to pass url in httptarget method while using PACT

while creating pact verification test i am using httpTarget Method. but the problem is my service dont have a port value. how can we run this? please advise.
Service URL=http://services.groupkt.com/country/get/iso3code/IND
below is my verification test.
package se.ff.bsv;
import au.com.dius.pact.provider.junit.PactRunner;
import au.com.dius.pact.provider.junit.Provider;
import au.com.dius.pact.provider.junit.State;
import au.com.dius.pact.provider.junit.loader.PactFolder;
import au.com.dius.pact.provider.junit.loader.PactUrl;
import au.com.dius.pact.provider.junit.target.HttpTarget;
import au.com.dius.pact.provider.junit.target.Target;
import au.com.dius.pact.provider.junit.target.TestTarget;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.ClassRule;
import org.junit.runner.RunWith;
import java.net.URL;
import java.util.Map;
#RunWith(PactRunner.class) // Say JUnit to run tests with custom Runner
#Provider("getCountryService") // Set up name of tested provider
#PactFolder("../pacts") // Point where to find pacts (See also section Pacts source in documentation)
//#PactUrl(urls = {"http://services.groupkt.com/country/get/iso3code/IND"} )
public class getCountryContractTest {
#State("There is a country with alpha2_code as IN having name as India") // Method will be run before testing
// interactions that require "with-data"
// state
public void hammerSmith() {
System.out.println("There is a country with alpha2_code as IN having name as India");
}
#TestTarget // Annotation denotes Target that will be used for tests
//public final Target target = new HttpTarget(8111);// Out-of-the-box implementation of Target (for more information take a look at Test Target section)
public final Target target = new HttpTarget("http", "services.groupkt.com",);
}

You can't say your service don't have a port, but you can say your service uses a default port (for instance). In that case, try to use port 80.

Problems while copying source code from a pdf

I need to copy some sections of source code from a pdf-file to a java project using eclipse neon.
Let me give you a quick example of the problem. I have code which looks like the following in the pdf:
import java.sql.Timestamp;
import twitter4j.FilterQuery;
import twitter4j.Status;
import twitter4j.StatusAdapter;
import twitter4j.StatusDeletionNotice;
import twitter4j.StatusListener;
import twitter4j.TwitterException;
import twitter4j.TwitterStream;
import twitter4j.TwitterStreamFactory;
public final class PrintSampleStream extends StatusAdapter {
public static void main(String[] args) throws TwitterException{
...
But in the workspace it is shown like this:
import java.sql.Timestamp; import twitter4j.FilterQuery; import twitter4j.Status; import twitter4j.StatusAdapter; import twitter4j.StatusDeletionNotice; import twitter4j.StatusListener; import twitter4j.TwitterException; import twitter4j.TwitterStream; import twitter4j.TwitterStreamFactory; public final class PrintSampleStream extends StatusAdapter { public static void main(String[] args) throws TwitterException{
How can i format the code and make it readable? Because formatting the code by hand would take too long.
Thanks for any ideas
P.S. CTRL + Shift +F doesn't help

It's a whitespace issue in the PDF or it's copy operation.
You can replace string ; (semicolon+space) by ;+ newline using the Eclispe search/replace dialog. See In Eclipse, how do I replace a character by a new line?

You say that ctrl+shift+F doesn't work for you. There is another way to format editor contents.
Go to: Window > Preferences > Java > Editor > Save actions and check the options Perform the selected actions on save, Format source code, Format all lines. Apply changes and then make small change in the editor (just to make it dirty) and save. Editor should automatically format.
Note: I am using Eclipse Luna but I believe that preference structure will be similar in Neon.
As for the reflow issues when copy pasting, you can check if this article helps you solve it.

This process isn't automated but you could use some free online code beautifiers such as
http://www.freecodeformat.com/java-format.php
http://jsbeautifier.org/
You basically have to copy-paste your unformatted code into a text-box. You can then "beautify" the code, by clicking a button. It then generates a formatted code. It isn't perfect, but it makes your code a lot more readable.
Example input:
import java.sql.Timestamp; import twitter4j.FilterQuery; import twitter4j.Status; import twitter4j.StatusAdapter; import twitter4j.StatusDeletionNotice; import twitter4j.StatusListener;public final class PrintSampleStream extends StatusAdapter { public static void main(String[] args) throws TwitterException{
Example output:
import twitter4j.FilterQuery;
import twitter4j.Status;
import twitter4j.StatusAdapter;
import twitter4j.StatusDeletionNotice;
import twitter4j.StatusListener;
public final class PrintSampleStream extends StatusAdapter {
public static void main(String[] args) throws TwitterException {

xuggler error - "cannot find symbol : class VideoImage" - what am i missing?

I am using xuggler to play video files from my code and the following is a snippet from the main code:
This snippet produces an error :
//The window we'll draw the video on.
private static VideoImage mScreen = null;
private static void updateJavaWindow(BufferedImage javaImage)
{
mScreen.setImage(javaImage);
}
// Opens a Swing window on screen.
private static void openJavaWindow()
{
mScreen = new VideoImage();
}
The error that i get is : cannot find symbol : class VideoImage
The header files used are :
import java.awt.image.BufferedImage;
import com.xuggle.xuggler.Global;
import com.xuggle.xuggler.IContainer;
import com.xuggle.xuggler.IPacket;
import com.xuggle.xuggler.IPixelFormat;
import com.xuggle.xuggler.IStream;
import com.xuggle.xuggler.IStreamCoder;
import com.xuggle.xuggler.ICodec;
import com.xuggle.xuggler.IVideoPicture;
import com.xuggle.xuggler.IVideoResampler;
import com.xuggle.xuggler.Utils;
Am i missing in some import statement ? If not , here are the libraries i am using apart from JDK :
What is the reason i am getting that error ?

VideoImage Javadoc
You are not importing the right class.
com.xuggle.xuggler.demos.VideoImage
It seems like you are already using an IDE. It should automatically tell you what import you are missing if the correct library is in the build path.

You need to import the VideoImage class.