How can I create a Class file and JAR file without main function?

How can I create the class file and jar file for this coding, when I compile this program its not working because there is no main function in the program. And also I am trying in command p开发者_运维知识库rompt but I don't know how to set the classpath? please help me My Coding is here

public class NewLogFields implements ILogNotify
{
    public void onLog(Level level, String comment, IMediaStream stream, String category,String event, int status, String context) {
        if (category.equals(WMSLoggerIDs.CAT_session) && event.equals(WMSLoggerIDs.EVT_destroy))
        {
            Long csBytes = (Long)WMSLoggerFactory.getGlobalLogValue(WMSLogger IDs.FD_cs_bytes);
            Long scBytes = (Long)WMSLoggerFactory.getGlobalLogValue(WMSLogger IDs.FD_sc_bytes);
            System.out.println("disconnect: csBytes:"+csBytes+" scBytes:"+scBytes);
        }
    }
}

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Once you compiled the coding in wowza media Serever the jar file is automatically created in the library folder,see your Installation Library folder.Still you have problem Gothrough this link Wowza Quick Guide

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What do you want to do?

Create a class and an jar file out of this Java code so that you can use this in another Java program?

Then you have to compile it:

java NewLogFields.java

Looks like you are unable to compile it at all. This could be because the interface ILogNotify (or the jar that contains this) is not in the classpath.

You can include the path/jar containing this interface in the classpath by using:

javac -cp .;path_to_jar_or_class NewLogFields.java

where path_to_jar_or_class is the path to the folder or jar file that contains ILogNotify. For example, this may be something like ./logNotify.jar or ./log/

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You can set use switch -cp or -classpath with javac command.

for example javac -cp path and name of jat file or class file yourjavafile.java

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create the class file using the compiler: javac NewLogFileds.java create the jar file using the jar command: jar cvf stuff.jar NewLogFileds.class

You are correct that the program needs a main() function in order to run. add: public static void main(String args[]) { // code here }

With that you could run the code with or without the jar: java NewLogFields or java -cp stuff.jar NewLogFields

There are ways of creating a MANIFEST file that tells java which class to run from the jar making the last line more simple.

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The link that you provided tells you how to do it:

1. Compile your class in the normal way.

2. Create a JAR file containing your class in the normal way.

3. Copy the JAR file into the wonza installation's lib as described in the javadoc.

4. Edit the startup script to add the -Dcom.wowza.wms.logging.LogNotify=... option to JAVA_OPTS ... as described in the javadoc.

   The "full-path-to-your-ILogNotify-class" is actually supposed to be the fully qualified class name of your class; it is obvious from the examples.

5. Edit WowzaMediaServerPro-Service.conf and log4j.properties as described in the javadoc.

6. Restart the server.

If you put your JAR file in the directory like the instructions tell you to, you won't need to modify the classpath by changing -cp argument.

Your class doesn't need a main method because it is not a free-standing application. Rather, it is a "plugin" class that gets dynamically loaded and instantiated by the Wowza core as required. The "-D..." option and the config file change tell the Wonza core which class to try to load.