I'm trying to instrument JBoss AS 7 using btrace but can't get it to work. I'm using visualvm 1.3.7 and the btrace workbench 0.6.7 (right click -> "Trace applicaiton..."). I'm always setting the following non-descriptive error.
!!! Error occured
!!! Error occured
What I tried is setting the following VM options
-Djboss.modules.system.pkgs=com.sun.btrace,com.sun.btrace.annotations
-Xbootclasspath/a:/path/to/btrace-boot-1.2.3.jar
but no avail. I am running on Java 8.
Even simple scripts like this don't work:
import static com.sun.btrace.BTraceUtils.println;
import com.sun.btrace.annotations.BTrace;
import com.sun.btrace.annotations.Kind;
import com.sun.btrace.annotations.Location;
import com.sun.btrace.annotations.OnMethod;
#BTrace
public class Simple {
#OnMethod(
clazz = "com.acme.Main",
method = "main",
location = #Location(Kind.ENTRY)
)
public static void mainEjbCall() {
println("enter");
}
}
* Update *
Yes, I assume it's a JBoss AS classloader issue but I don't know how to fix it.
I can profile normal Java 8 applications (even though I get an exception from the ASM ClassReader).
Related
Android studio cannot create JavaDoc. It throws a null pointer exception and cannot identify any of the android packed items.
...
/home/<user>/AndroidStudioProjects/<project>/app/src/main/java/com/example/simpleparadox/listycity/MainActivity.java:14: error: cannot access ViewGroup
public class MainActivity extends AppCompatActivity {
^
class file for android.view.ViewGroup not found
javadoc: error - fatal error encountered: java.lang.NullPointerException
javadoc: error - Please file a bug against the javadoc tool via the Java bug reporting page
(http://bugreport.java.com) after checking the Bug Database (http://bugs.java.com)
for duplicates. Include error messages and the following diagnostic in your report. Thank you.
java.lang.NullPointerException
at jdk.compiler/com.sun.tools.javac.comp.TypeEnter$MembersPhase.runPhase(TypeEnter.java:934)
at jdk.compiler/com.sun.tools.javac.comp.TypeEnter$Phase.doCompleteEnvs(TypeEnter.java:282)
at jdk.compiler/com.sun.tools.javac.comp.TypeEnter$MembersPhase.doCompleteEnvs(TypeEnter.java:877)
at jdk.compiler/com.sun.tools.javac.comp.TypeEnter$Phase.completeEnvs(TypeEnter.java:251)
at jdk.compiler/com.sun.tools.javac.comp.TypeEnter$Phase.completeEnvs(TypeEnter.java:266)
at jdk.compiler/com.sun.tools.javac.comp.TypeEnter$Phase.completeEnvs(TypeEnter.java:266)
at jdk.compiler/com.sun.tools.javac.comp.TypeEnter$Phase.completeEnvs(TypeEnter.java:266)
at jdk.compiler/com.sun.tools.javac.comp.TypeEnter.complete(TypeEnter.java:198)
at jdk.compiler/com.sun.tools.javac.code.Symbol.complete(Symbol.java:642)
at jdk.compiler/com.sun.tools.javac.code.Symbol$ClassSymbol.complete(Symbol.java:1326)
at jdk.compiler/com.sun.tools.javac.comp.Enter.complete(Enter.java:583)
at jdk.compiler/com.sun.tools.javac.comp.Enter.main(Enter.java:560)
at jdk.javadoc/jdk.javadoc.internal.tool.JavadocEnter.main(JavadocEnter.java:79)
at jdk.javadoc/jdk.javadoc.internal.tool.JavadocTool.getEnvironment(JavadocTool.java:206)
at jdk.javadoc/jdk.javadoc.internal.tool.Start.parseAndExecute(Start.java:576)
at jdk.javadoc/jdk.javadoc.internal.tool.Start.begin(Start.java:432)
at jdk.javadoc/jdk.javadoc.internal.tool.Start.begin(Start.java:345)
at jdk.javadoc/jdk.javadoc.internal.tool.Main.execute(Main.java:63)
at jdk.javadoc/jdk.javadoc.internal.tool.Main.main(Main.java:52)
7 errors
Then I found a work around which add -bootclasspath path_to_sdk_android_jar_file in the other command-line argument text box in the JavaDoc dialog.
However, newer Java deprecated -bootclasspath. It throws another error as follows:
error: option --boot-class-path not allowed with target 11
So I used -sourcepath instead. That brought the old error (NullPointerException).
I am pretty much lost at this point.
By the way, if I choose a class with only Java elements (no-android) and create JavaDoc to that specific file only, it creates JavaDoc nicely. But this is not a good workaround for a project with a lot of classes.
I've faced the same issue as yours with several imports errors..
The following solution worked for me ( I got it from mike192's answer, see the link here )
task javadoc(type: Javadoc) {
doFirst {
configurations.implementation
.filter { it.name.endsWith('.aar') }
.each { aar ->
copy {
from zipTree(aar)
include "**/classes.jar"
into "$buildDir/tmp/aarsToJars/${aar.name.replace('.aar', '')}/"
}
}
}
configurations.implementation.setCanBeResolved(true)
source = android.sourceSets.main.java.srcDirs
classpath += project.files(android.getBootClasspath().join(File.pathSeparator))
classpath += configurations.implementation
classpath += fileTree(dir: "$buildDir/tmp/aarsToJars/")
destinationDir = file("${project.buildDir}/outputs/javadoc/")
failOnError false
exclude '**/BuildConfig.java'
exclude '**/R.java'
}
All you need to do is to add the code to your build.gradle file right before your dependencies {}
Then, double click on your Ctrl button and execute the following command :
gradle javadoc
The result of the javadoc can be then found in your project's directory \app\build\outputs\javadoc
I hope this works for you
I have an Apache Apex application DAG which reads RabbitMQ message from a queue. Which Apache Apex Malhar operator should I use? There are several operators but it's not clear which one to use and how to use it.
Have you looked at https://github.com/apache/apex-malhar/tree/master/contrib/src/main/java/com/datatorrent/contrib/rabbitmq ? There are also tests in https://github.com/apache/apex-malhar/tree/master/contrib/src/test/java/com/datatorrent/contrib/rabbitmq that show how to use the operator
https://github.com/apache/apex-malhar/blob/master/contrib/src/main/java/com/datatorrent/contrib/rabbitmq/AbstractRabbitMQInputOperator.java
That is the main operator code where the tuple type is a generic parameter and emitTuple() is an abstract method that subclasses need to implement.
AbstractSinglePortRabbitMQInputOperator is a simple subclass that provides a single output port and implements emitTuple() using another abstract method getTuple() which needs an implementation in its subclasses.
The tests that Sanjay pointed to show how to use these classes.
I also had problems finding out how to read messages from RabbitMQ to Apache Apex. With the help of the provided links of Sanjay's answer (https://stackoverflow.com/a/42210636/2350644) I finally managed to get it running. Here's how it works all together:
1. Setup a RabbitMQ Server
There are lot of ways installing RabbitMQ that are described here: https://www.rabbitmq.com/download.html
The simplest way for me was using docker (See: https://store.docker.com/images/rabbitmq)
docker pull rabbitmq
docker run -d --hostname my-rabbit --name some-rabbit -p 5672:5672 -p 15672:15672 rabbitmq:3-management
To check if RabbitMQ is working, open a browser and navigate to: http://localhost:15672/. You should see the Management page of RabbitMQ.
2. Write a Producer program
To send messages to the queue you can write a simple JAVA program like this:
import com.rabbitmq.client.BuiltinExchangeType;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import java.util.ArrayList;
public class Send {
private final static String EXCHANGE = "myExchange";
public static void main(String[] args) throws Exception {
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();
channel.exchangeDeclare(EXCHANGE, BuiltinExchangeType.FANOUT);
String queueName = channel.queueDeclare().getQueue();
channel.queueBind(queueName, EXCHANGE, "");
List<String> messages = Arrays.asList("Hello", "World", "!");
for (String msg : messages) {
channel.basicPublish(EXCHANGE, "", null, msg.getBytes("UTF-8"));
System.out.println(" [x] Sent '" + msg + "'");
}
channel.close();
connection.close();
}
}
If you execute the JAVA program you should see some outputs in the Management UI of RabbitMQ.
3. Implement a sample Apex Application
3.1 Bootstrap a sample apex application
Follow the official apex documentation http://docs.datatorrent.com/beginner/
3.2 Add additional dependencies to pom.xml
To use the classes provided by malhar add the following dependencies:
<dependency>
<groupId>org.apache.apex</groupId>
<artifactId>malhar-contrib</artifactId>
<version>3.7.0</version>
</dependency>
<dependency>
<groupId>com.rabbitmq</groupId>
<artifactId>amqp-client</artifactId>
<version>4.2.0</version>
</dependency>
3.3 Create a Consumer
We first need to create an InputOperator that consumes messages from RabbitMQ using available code from apex-malhar.
import com.datatorrent.contrib.rabbitmq.AbstractSinglePortRabbitMQInputOperator;
public class MyRabbitMQInputOperator extends AbstractSinglePortRabbitMQInputOperator<String> {
#Override
public String getTuple(byte[] message) {
return new String(message);
}
}
You only have to override the getTuple() method. In this case we simply return the message that was received from RabbitMQ.
3.4 Setup an Apex DAG
To test the application we simply add an InputOperator (MyRabbitMQInputOperator that we implemented before) that consumes data from RabbitMQ and a ConsoleOutputOperator that prints the received messages.
import com.rabbitmq.client.BuiltinExchangeType;
import org.apache.hadoop.conf.Configuration;
import com.datatorrent.api.annotation.ApplicationAnnotation;
import com.datatorrent.api.StreamingApplication;
import com.datatorrent.api.DAG;
import com.datatorrent.api.DAG.Locality;
import com.datatorrent.lib.io.ConsoleOutputOperator;
#ApplicationAnnotation(name="MyFirstApplication")
public class Application implements StreamingApplication
{
private final static String EXCHANGE = "myExchange";
#Override
public void populateDAG(DAG dag, Configuration conf)
{
MyRabbitMQInputOperator consumer = dag.addOperator("Consumer", new MyRabbitMQInputOperator());
consumer.setHost("localhost");
consumer.setExchange(EXCHANGE);
consumer.setExchangeType(BuiltinExchangeType.FANOUT.getType());
ConsoleOutputOperator cons = dag.addOperator("console", new ConsoleOutputOperator());
dag.addStream("myStream", consumer.outputPort, cons.input).setLocality(Locality.CONTAINER_LOCAL);
}
}
3.5 Test the Application
To simply test the created application we can write a UnitTest, so there is no need to setup a Hadoop/YARN cluster.
In the bootstrap application there is already a UnitTest namely ApplicationTest.java that we can use:
import java.io.IOException;
import javax.validation.ConstraintViolationException;
import org.junit.Assert;
import org.apache.hadoop.conf.Configuration;
import org.junit.Test;
import com.datatorrent.api.LocalMode;
/**
* Test the DAG declaration in local mode.
*/
public class ApplicationTest {
#Test
public void testApplication() throws IOException, Exception {
try {
LocalMode lma = LocalMode.newInstance();
Configuration conf = new Configuration(true);
//conf.addResource(this.getClass().getResourceAsStream("/META-INF/properties.xml"));
lma.prepareDAG(new Application(), conf);
LocalMode.Controller lc = lma.getController();
lc.run(10000); // runs for 10 seconds and quits
} catch (ConstraintViolationException e) {
Assert.fail("constraint violations: " + e.getConstraintViolations());
}
}
}
Since we don't need any properties for this application the only thing changed in this file is uncommenting the line:
conf.addResource(this.getClass().getResourceAsStream("/META-INF/properties.xml"));
If you execute the ApplicationTest.java and send messages to RabbitMQ using the Producer program as described in 2., the Test should output all the messages.
You might need to increase the time of the test to see all messages (It is set to 10sec currently).
I have been trying to implement this design for couple of days ago and had no success. (before continuing I tell that I have read this article "How can I inject an EJB from an other application on the same GlassFish Server?" and other than glassfish-ejb-jar.xml I tried everything in it )
I have 2 ear application. test.ear is my main app which I want to test it, but I don't want to add any remote interfaces in this project, so I created another .ear(automation.ear) which contains remote interfaces and inject EJBs from test.ear . so my standalone application calls automation app and can not access test application directly.
each application contains these modules: entities, ejb , ear (for example automation application contains :automation-entities, automation-ejb, automation-ear)
here is my journey :
(I deployed test.ear before all these attempts)
-first try: I added test.ejb with ejb type as a maven dependency to automation-ejb pom.xml and injected EJB of test.ear in one of the beans of automation project and gave it a mappedName; it worked however I realized that it is a false positive and it actually doesn't go to the implementation of test.ear. it uses the copy it has (because of dependency)
- second try: I added a plugin in pom.xml of test.ear to create ejb-client for me (which only contains the interfaces and not the implementation) and added this .jar to automation pom.xml as a dependency, then injected the ejb gave it mappedName and try to deply ; well it complained about not finding the class!--> can't deploy
- third try: I added a copy of the interface I wanted to use(from test.ear) in automation.ear and removed the dependencies in pom.xml of automation. injected EJB and gave it the mappedName; tried to deploy and no luck ! still can't find the class--> can't deploy
Here are my classes:
test.ear application
package com.ericsson.test.service;
import javax.ejb.Local;
#Local
public interface TestService1 {
public String TestMethod1();
}
//////////////////////////////////////////////////////
package com.ericsson.test.service;
import javax.ejb.Local;
import javax.ejb.Stateless;
#Local(TestService1.class)
#Stateless(name = "TestService1")
public class TestServiceBean1 implements TestService1{
#Override
public String TestMethod1() {
return "Test Method1";
}
}
automation.ear application
#Remote
public interface RemoteInterfaceTest{
public void doSomething();
}
////////////////////////////////////////////////////////////////////////
package com.ericsson.test.service;
import javax.annotation.PostConstruct;
import javax.ejb.EJB;
import javax.ejb.Singleton;
import javax.ejb.Startup;
import javax.naming.InitialContext;
#Singleton
#Startup
public class RemoteInterfaceTestBean implements RemoteInterfaceTest {
#EJB(mappedName = "Test-Server-Local/test-ejb-0.0.1-SNAPSHOT/TestService1/local")
private TestService1 testService1EJB;
#PostConstruct
public void doSomething() {
try {
InitialContext ic = new InitialContext();
TestService1 service1 = (TestService1) ic
.lookup("java:global/Test-Server-Local/test-ejb-0.0.1-SNAPSHOT/TestService1");
System.out.println(service1.TestMethod1());
} catch (Exception e) {
System.out.println(e.getMessage());
System.out.println("OOOOOOPPPPPPSSSSSSSSS ! First try");
}
try {
testService1EJB.TestMethod1();
} catch (Exception e) {
System.out.println("OOOOOOPPPPPPSSSSSSSSS ! Second try");
}
}
}
and this is the exception I get:
SEVERE: Exception while deploying the app [automation-csdp-remote] : Cannot resolve reference Local ejb-ref name=com.ericsson.test.service.RemoteInterfaceTestBean/testService1EJB,Local 3.x interface =com.ericsson.test.service.TestService1,ejb-link=null,lookup=,mappedName=Test-Server-Local/test-ejb-0.0.1-SNAPSHOT/TestService1/local,jndi-name=,refType=Session
I have tried played with it like 1000 times, I checked the glass fish and the class is there, why it can not find it ? any idea would be greatly appreciated.
I am using EJB 3.x , glassfish 3.1.2 , maven 3.0.5, eclipse kepler
My application is based on playframework and contains multiple modules.
The database interaction is handled trough JPA (<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>)
My task is to cover one of these modules with unit-tests.
Unfortunately running the "play test" command with unit tests provied on module-level results in the following Exception:
javax.persistence.PersistenceException: No Persistence provider for EntityManager named defaultPersistenceUnit
Persistence-Provider is defined globaly (outside of the Module) in conf/META-INF/persistence.xml
copying the global persistence.xml to the module doesn't fix the issue.
Placing the tests outside of the module (in global test directory) and execute them works flawless presuming that there are no other tests within modules.
Can someone explain me why the Error comes up? Is there any way to have working JPA-capable tests on module level?
Thanks in advance
Urs
I had the same problem running JUnit tests from my play application in Eclipse.
To solve this issue you need to make the folder conf available to the all project.
Project Properties-> Java Build Path ->Source
Add Folder and choose the conf folder.
I checked your code. I think don't need another persistence.xml. Can you try these solutions in play module:
#Test()
public void empty() {
running(fakeApplication(), new Runnable() {
public void run() {
JPA.withTransaction(new play.libs.F.Callback0() {
public void invoke() {
Object o = new Object(someAttrib);
o.save();
assertThat(o).isNotNull();
}
});
}
});
}
Or:
#Before
public void setUpIntegrationTest() {
FakeApplication app = fakeApplication();
start(app);
em = app.getWrappedApplication().plugin(JPAPlugin.class).get().em("default");
JPA.bindForCurrentThread(em);
}
These codes are from this page. I don't test it!
Please modify your code to:
#BeforeClass
public static void setUp() {
FakeApplication app = fakeApplication(inMemoryDatabase());
start(app);
em = app.getWrappedApplication().plugin(JPAPlugin.class).get().em("default");
JPA.bindForCurrentThread(em);
}
Please try it!
I've recently changed to Ubuntu 11.10 (from Windows Vista).I use mono (2.8.5) as my IDE (C# VS.net before) to program.
As a quick test I want to make a console program with the following code:
using System;
namespace DeleteMe1
{
class MainClass
{
public static void Main (string[] args)
{
Console.WriteLine ("Hello World!");
Console.ReadKey ();
}
}
}
If I run the program I see a screen appear and disappear (very quickly). When I debug I get the following error:
Could not open port for debugger. Another process may be using the port.
Is someone familiar with these messages? I've already tried the following:
https://stackoverflow.com/questions/8...using-the-port
But the property key (Property key="MonoTouch.Debugger.Port" value="10000") is not available.
Whats wrong?
Thanks in advance and with best regards.