grizzly logs to stderr, annoying in eclipse - eclipse

When i run my junit jersey service tests using the grizzly framework in eclipse, the log is directed to stderr. As a result the console window grabs focus, and the log appears red.
I can't figure out the proper configuration steps. From my reading it looks like i need to add the slf4j.jar to my pom.xml and add a logging properties file somewhere? But i'm unsure which slf4j jars to add (there are many) or where to place the logging properties file.
Or, frankly, if this is the right approach in general.
p.s. also i am aware i can turn off the "show console when standard error changes" feature in eclipse, but i'd rather not paint over the problem. :)

It doesn't look to me like Grizzly used slf4j, but rather the "standard" java.util.logging framework. If that's the case, you can read about configuring it here: http://docs.oracle.com/javase/6/docs/technotes/guides/logging/overview.html#1.8

With Eric's help above I created this class:
package org.trebor.www;
import java.util.logging.ConsoleHandler;
import java.util.logging.Handler;
import java.util.logging.Logger;
public class LoggerTrap
{
public LoggerTrap()
{
Handler handler =
new ConsoleHandler()
{
{
setOutputStream(System.out);
}
};
Logger.getLogger("").addHandler(handler);
}
}
and added this jvm arg
-Djava.util.logging.config.class=org.trebor.www.LoggerTrap
and all java.logging goes to STDOUT. In the process I've learned that I don't much like java.logging.

Related

Can't redirect Trace.WriteLine to Serilog using SerilogTraceListener

In one of my project (.net core 3.1), I need a way to redirect System.Diagnostics.Trace.WriteLine to Serilog file. I found the SerilogTraceListener package which seems to be the right candidate.
Unfortunately until now, I haven't been able to find a way to make it works.
To reproduce it,
1) Create a .net core console project
2) Add the following nuget package : Serilog, SerilogTraceListener, Serilog.Sink.Console, Serilog.Sink.File
3) Overwrite the Program class code by the following
class Program
{
static void Main(string[] args)
{
// Works fine
Log.Logger = new LoggerConfiguration()
.WriteTo.Console()
.WriteTo.File("log.txt")
.CreateLogger();
Log.Logger.Information("A string written using Logger.Information");
// Trace is written in the console but not in the file
Trace.Listeners.Add(new ConsoleTraceListener());
Trace.Listeners.Add(new global::SerilogTraceListener.SerilogTraceListener());
System.Diagnostics.Trace.WriteLine("A string written using Trace.WriteLine");
}
}
What am I doing wrong?
TL;DR; You need to set the MinimumLevel to Debug or Verbose in order to see the Trace.WriteLine messages.
SerilogTraceListener maps System.Diagnostic.TraceEventType to Serilog.LogEventLevel, and when you call Trace.WriteLine, it maps these events to the Debug log event level.
That means Serilog's logger is receiving a message of type LogEventLevel.Debug.
The minimum level configured in Serilog by default is Information, which means Debug messages are being suppressed.
You have to configure the MinimumEventLevel to Debug (or Verbose) in order to see the Trace.WriteLine messages:
Log.Logger = new LoggerConfiguration()
.MinimumLevel.Debug() // <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
.WriteTo.Console()
.WriteTo.File("log.txt")
.CreateLogger();

Using Eclipse's JDT, how do I identify the classpath for a project?

I am writing a plug-in that will generate unit tests for a Java class that is selected in Eclipse's Project Explorer. This plug-in uses a third-party program called Randoop to generate the tests, so I make this happen using ProcessBuilder:
ProcessBuilder builder = new ProcessBuilder(command);
where the command that is passed to the ProcessBuilder is a list of Strings, something like
["java", "-classpath", "path1;path2;etc", "randoop.main.Main", ...]
Within the plug-in I am trying to generate the classpath for Randoop based on the classpath that Eclipse knows about. Here is some of what I have so far:
IClasspathEntry[] resolvedClasspath = javaProject.getResolvedClasspath(true);
for (IClasspathEntry entry : resolvedClasspath) {
if (entry.getEntryKind() == IClasspathEntry.CPE_SOURCE) {
IPath outputLocation = entry.getOutputLocation();
if (outputLocation != null) {
buf.append(outputLocation.toString());
}
else {
buf.append(entry.getPath().toString());
}
}
else {
buf.append(entry.getPath().toString());
}
buf.append(CLASSPATH_SEP);
}
It isn't quite right. It seems to specify the library jar files okay, but doesn't do so well with identifying the paths to class files corresponding to CPE_SOURCE entries. For example, I see a classpath entry of /myPkgFragRoot/src/main/java instead of myPkgFragRoot/target/classes.
I seem to have a muddled picture of how Eclipse treats classpaths, so I'm looking for some help. Firstly, I'm wondering if my high-level approach is wrong. It seems like I am writing a large amount of code to generate an incorrect classpath. Is there some simpler way of getting a classpath from an IJavaProject than getting the results of getResolvedClasspath and iterating through them and manipulating the individual entries? Secondly, if there isn't a simpler way, how should I be locating the class files produced by building the project?
If the outputLocation is null, you have to use the default output location javaProject.getOutputLocation() instead of entry.getPath().
See Javadoc of IClasspathEntry.getOutputLocation():
Returns:
the full path [...], or null if using default output folder
If in Project > Properties: Java Build Path tab Source the check box Allow output folders for source folders is not checked, IClasspathEntry::getOutputLocation() will always return null.

Where do you find the JDBCProvider Interface?

As part of my ongoing JDBC/Oracle saga, I solicited the help of one of our Java/JDBC experts and after receiving some more input via my last question "For JDBC in XPages, how does the server know the connection information?" we imbarked on creating a plugin for my ojdbc14.jar file. We got the plugin created and tried to complile it. It complained that it could not find the JDBCProvider Interface. My question is where do I find this? Is this part of the Extension Library files on the Server or is this something completely different?
As always, any help will be greatly appreciated.
Thanks,
MJ
You'll want to pick com.ibm.commons.Extension in the Extension Point dialog, and then set the type as com.ibm.commons.jdbcprovider. Set the class to your JDBC driver provider class (named com.ZetaOne.JDBC.drivers.DB2.DB2DriverProvider for example) which i've provided sample code for below that looks like this (customized to your particular driver, etc)
package com.ZetaOne.JDBC.drivers.DB2;
import java.sql.Driver;
import java.sql.SQLException;
import com.ibm.commons.jdbc.drivers.IJDBCDriverAlias;
import com.ibm.commons.jdbc.drivers.JDBCProvider;
public class DB2DriverProvider implements JDBCProvider {
public DB2DriverProvider() {
{
public Driver loadDriver(String className) throws SQLException {
if(classNmae.equals(com.ibm.db2.jcc.DB2Driver.class.getName())) {
return new com.ibm.db2.jcc.DB2Driver();
}
return null;
}
}
Assuming you've done everything else needed for the plugin, you should be able to export / create your update site and install the driver.
BTW, you'll be able to read how to setup & deploy and use the JDBC package in ExtLibX in our upcoming book "XPages Extension Library: A Step by Step Guide to the Next Generation of XPage Controls" - available on amazon pre-order at http://www.amazon.com/XPages-Extension-Library-Step---Step/dp/0132901811
Hope this helps.

EventLogInstaller Full Setup with Categories?

It appears the MSDN docs are broken concerning creating an Event Log completely along with a definitions file for messages. I am also lost on how to setup Categories (I have custom numbers in the 3000's for messages).
Can anyone point me to a link or show sample code on how to make this right?
You should start (if you haven't done so already) here:
EventLogInstaller Class (System.Diagnostics)
The sample provided there is the foundation for what you want to do. To sum it up, build a public class inheriting from System.Configuration.Install.Installer in an assembly (could be the same DLL where you have the rest of your application, a separate DLL, or an EXE file), decorate it with the RunInstaller attribute, and add your setup code in the constructor:
using System;
using System.Configuration.Install;
using System.Diagnostics;
using System.ComponentModel;
[RunInstaller(true)]
public class MyEventLogInstaller: Installer
{
private EventLogInstaller myEventLogInstaller;
public MyEventLogInstaller()
{
// Create an instance of an EventLogInstaller.
myEventLogInstaller = new EventLogInstaller();
// Set the source name of the event log.
myEventLogInstaller.Source = "NewLogSource";
// Set the event log that the source writes entries to.
myEventLogInstaller.Log = "MyNewLog";
// Add myEventLogInstaller to the Installer collection.
Installers.Add(myEventLogInstaller);
}
}
When you have your assembly compiled, you may use the InstallUtil tool available through the Visual Studio Command Prompt to run the installer code.
Regarding the message definition file (which includes category definitions), the MSDN documentation for EventLogInstaller.MessageResourceFile mentions that you should create an .mc file, compile it, and add it as a resource to your assembly. Digging around, I found an excellent post which should guide you to the end, here:
C# with .NET - Event Logging (Wayback Machine)

How do I verify that an NUnit Addin has been loaded?

From what I can tell, the assembly containing the addin must be located in C:\Program Files (x86)\NUnit 2.5.7\bin\net-2.0\addins. I think my assembly is being loaded because I have to close NUnit-gui before I can replace the assembly in the addins directory. The problem, however, is that I don't see any of the effects of the addin (None of the event handlers are being called)
So how do I verify that my addin has been loaded? I'd love to step through with the debugger but I'd be perfectly happy with print line debugging. When I tried doing a File.WriteAllText() the addin failed to load but gave no reason. Also, how do I debug the loading process?
The NUnit docs are helpful, but they're bare bones at best when it comes to extensibility and there isn't any intellisense available for classes in NUnit.Core.
You should use some tracing library like this one which you can download here.
Now you can decorate your relevant methods with using statements like this:
using ApiChange.Infrastructure;
class MyAddin
{
static TypeHashes myType = new TypeHashes(typeof(MyAddin);
void RelevantMethod()
{
using (Tracer t = new Tracer(myType, "RelevantMethod"))
{
....
if(bLoaded == false)
t.Error("Could not load adding because of {0}", reason);
}
}
}
Then you can enable tracing via the environment variable _TRACE
set _Trace=debugoutput
DebugOutput can be viewed with the SysInternals tool DbgView (no attach simply start it and watch the traces).
Or you trace to a file
set _Trace=file
The trace file is located where the executable is e.g. Nunit.exe.txt. If you set _TRACE to some random string it will trace the help to console and OutputDebugString to give you help.
Why this trace library? It is actually the ONLY one which is able to trace any exception when your method is left. This does work when the method contains using statements for tracing like the one above. If it is actually your fault that NUnit does choose to ignore your plugin you can find out now.
The output will look like this:
* ApiChange.IntegrationTests.Diagnostics.TracingTests.Demo_Show_Leaving_Trace_With_Exception
18:57:46.665 03064/05180 <{{ > ApiChange.IntegrationTests.Diagnostics.TracingTests.SomeMethod
18:57:46.668 03064/05180 <{{ > ApiChange.IntegrationTests.Diagnostics.TracingTests.SomeOtherMethod
18:57:46.670 03064/05180 < }}< ApiChange.IntegrationTests.Diagnostics.TracingTests.SomeOtherMethod Exception thrown: System.NotImplementedException: Hi this a fault
at ApiChange.IntegrationTests.Diagnostics.TracingTests.FaultyMethod()
at ApiChange.IntegrationTests.Diagnostics.TracingTests.SomeOtherMethod()
at ApiChange.IntegrationTests.Diagnostics.TracingTests.SomeMethod()
at ApiChange.IntegrationTests.Diagnostics.TracingTests.Demo_Show_Leaving_Trace_With_Exception()
18:57:46.670 03064/05180 < }}< ApiChange.IntegrationTests.Diagnostics.TracingTests.SomeOtherMethod Duration 2ms
18:57:46.689 03064/05180 < }}< ApiChange.IntegrationTests.Diagnostics.TracingTests.SomeMethod Duration 24ms
That should make it easy to find out why your Addin was not used at all. And you do not need a debugger ;-).
Yours,
Alois Kraus