Kou Junsei

JRuby Calling Java class Cannot import class 'com.foo.bar' as 'bar'

Using Java from Ruby with JRuby IRB

Log4j, an open source project, allows developers to control which log statements are output with arbitrary granularity. It's fully configurable at runtime by using external configuration files. When the page will be requested by a client, a Java class will generate the HTML page and the HTML page will be sent to the client. This Java class is called a ... the servlet is generated by the JSP only for the first request call. The same servlet is reused after then. ... // Imported as a result of <%@ page import="com.foo.bar" %> 10 import ... Jakarta EE Programming/Jakarta Server Pages Syntax ... Log4j delivers control over logging

9.0.0.0.rc1 · Issue ...

JRuby unable to find methods unless jar is in boot ... import does not accept :: for static nested classes ... JRuby-complete-jar is used to run org.jruby.Main which then runs a JRuby-script calling a few Java-classes. Expected Behavior When running a simple script with just having JRuby in the classpath, not in boot classpath, I would expect the JRuby to correctly resolve Java-methods and call … Notice that the trace messages from com.foo.Bar appear twice. This is because the appender associated with logger com.foo.Bar is first used, which writes the first instance to the Console. Next, the parent of com.foo.Bar, which in this case is the root logger, is referenced.The event is then passed to its appender, which is also writes to the Console, resulting in the second instance. Why GitHub? Features →. Code review; Project management; Integrations; Actions; Packages; Security One of the JRuby killer features is that we can use Java classes into our Ruby code as they were Ruby classes. This is the foundation for hundred of projects, take your favourite Java library and create a layer to do it more Ruby friendly, Trinidad’s … Migration from JRuby to Ruby In JRuby Java classes can either be referenced in the Java module, such as Java::ComFoo::Bar, or if they have a common TLD they can be referenced as com.foo.Bar. java_import com.foo.Bar will define Bar as a top-level constant. In TruffleRuby Java classes are referred to using either Java.type('com.foo.Bar'), which you would then normally assign ... java` by example

Can I import Java class files into JRuby?

Using Java from Ruby with JRuby IRB I get a slightly different message when seeing the context class-loader, but it still fails. >> java.lang.Thread.currentThread.setContextClassLoader JRuby.runtime.jruby_class_loader => nil >> java_import 'org.apache.hadoop.hbase.protobuf.ProtobufUtil' NameError: cannot link Java class org.apache.hadoop.hbase.protobuf.ProtobufUtil, probable missing dependency: Could not initialize class … I guess the code above is pretty self explaining, i hava a Ruby class that implements a Java interface, and i want to pass that class back to another Java class. However, when a execute the ruby code i get the following error: The documentation seems to suggest that in order for me to import Java classes into JRuby, that they must be in a JAR file: "In order to use resources within a jar file from JRuby the jar file must 9.0.0.0.rc1 · Issue ... Struggling With Ruby: JRuby and Java If you are using JRuby you can access Java functionality in your Ruby code pretty easily. Two possible reasons to do this are to create an involved user interface (for simple GUIs the Shoes toolkit is excellent, but it is somewhat limited), and to create images on-the-fly for your Rails application (RMagick offers an alternative, but cannot be used with Tomcat, which requires JRuby). Importing Java class Bazz = Java::foo.bar.Bazz java_import foo.bar.Bazz java_import java.lang.SystemTuesday, June 14, 2011 8Ruby Class names are separated by namespaces, which is delimited by double colons.Javas built-in classes dont need to be referred to via a StringRuby class names are constants, the name of which must start with a capital ... Passing a ruby class as a java.lang.Class into Java land ...

Passing a ruby class as a java.lang.Class into Java land ...

Practical JRuby on Rails Web 2.0 Projects: Chapter 6: Java ... JRuby provides access to the Java ecosystem from within Ruby and vice versa. This chapter explores a variety of strategies for integration with Java classes, primitives, arrays, and more. It also points out some gotchas to watch out for along the Ruby way to Java. HttpServer (Java HTTP Server ) I have written some code (3 java classes) that I wish to call from a PL/SQL procedure package. Whenever I run the code I am getting the following error: ORA-29540: class com/foo/bar does not exist What is strange about this is that I am not calling a class called "com/foo/bar", I am actually calling "com.foo.bar.scrubVisitor" from the PL/SQL ... Java syntax Java Stored Procedure class does not exist This class implements a simple HTTP server. A HttpServer is bound to an IP address and port number and listens for incoming TCP connections from clients on this address. The sub-class HttpsServer implements a server which handles HTTPS requests. One or more HttpHandler objects must be associated with a server in order to process requests. Each ... For > example: > *) you cannot use a variable var in place of instance when evaluating > or changing field values, because that variable is not directly a java > object ==> use var.java_object to get the wrapped java object > *) JavaField is a son of JavaAccessible ==> to make a field accessible > just use the (generated) accessor named ... import java.util.*; /*This form of importing classes makes all classes in package java.util available by name, could be used instead of the import declaration in the previous example. */ import java.*; /*This statement is legal, but does nothing, since there are no classes directly in package java.