jhades / angularjs-gulp-example

Angular Gulp baseline build

JHades - Your way out of Jar Hell!

JHades is a Java classpath troubleshooting tool. It helps to solve common Java classpath / Jar Hell related problems such as ClassNotFoundException, NoClassDefFoundError, ClassCastException, NoSuchMethodException, LinkageError, etc.

It allows to query the classpath for class duplicates, find specific resource locations, etc.

Documentation available at http://jhades.github.io

Example of a classpath problem

Let's say a java web application works fine in development, but when deploying it to a server the following problem occurs:

java.lang.ClassCastException: org.apache.bval.jsr303.ApacheValidationProvider cannot be cast to javax.validation.spi.ValidationProvider
	javax.validation.Validation$DefaultValidationProviderResolver.getValidationProviders(Validation.java:332)
	javax.validation.Validation$GenericBootstrapImpl.configure(Validation.java:256)
	javax.validation.Validation.buildDefaultValidatorFactory(Validation.java:111)
	classloaders.test.TestServlet.doGet(TestServlet.java:33)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:91)

How to troubleshoot

JHades provides several commands that allow to extract from the runtime environment a lot of information which is important for understanding what is going on. Namelly these types of questions can be answered:

• are there any overlapping jars, with different versions of the same class?
• Are those multiple versions of the same class all identical or not ?
• where are the different versions of a given class located ?
• which class loader is loading which version of a given class ?
• What does the chain of classloaders look like, how are the classloaders configured ?

This is an example of how to answer several of these questions for the sample problem above:

 
 new JHades()
	.printClassLoaders()
	.printClasspath()
	.overlappingJarsReport()
	.multipleClassVersionsReport()
	.findClassByName("org.apache.bval.jsr303.ApacheValidationProvider")
	.findClassByName("javax.validation.spi.ValidationProvider"); 
	

Jar overlap report

One of the most common sources of classpath problems are overlapping jar files, that contain multiple versions of the same class:

>>>> Jar overlap report: 
 
aspectjrt-1.7.2.jar overlaps with aspectjweaver-1.7.2.jar - total overlapping classes: 129
ejb3-persistence-1.0.2.GA.jar overlaps with hibernate-jpa-2.0-api-1.0.1.Final.jar - total overlapping classes: 91
stax-api-1.0-2.jar overlaps with xml-apis-1.4.01.jar - total overlapping classes: 34
javax.xml.soap-api-1.3.5.jar overlaps with saaj-api-1.3.jar - total overlapping classes: 29
commons-beanutils-1.8.3.jar overlaps with commons-collections-3.2.1.jar - total overlapping classes: 10
xbean-2.2.0.jar overlaps with xml-apis-1.4.01.jar - total overlapping classes: 6
commons-logging-1.1.1.jar overlaps with jcl-over-slf4j-1.6.6.jar - total overlapping classes: 6
 
Total number of classes with more than one version: 305

Check http://jhades.github.io for more details.

angularjs-gulp-example's Issues

followed the instructions in read me file but got error

followed the instructions in read me file but got error on running "gulp"

.../work/samples/angular1_seed/angularjs-gulp-example/node_modules/socket.io/lib/store.js:35
Store.prototype.proto = EventEmitter.prototype;
^

TypeError: Cannot read property 'prototype' of undefined
at Object. (/Users/saurabh/work/samples/angular1_seed/angularjs-gulp-example/node_modules/socket.io/lib/store.js:35:41)
at Module._compile (module.js:571:32)

extra steps under osx

I don't know enough about the build chain to fix myself (if I have time I'll figure it out).
npm install -g gulp
npm install gulp-sass
npm install node-sass

Otherwise you get:
Gulp not found
And then
throw new Error('libsass bindings not found. Try reinstalling node-sass?');

Unable to build, problem with karma

a.txt

This is a log, I am trying to install on a window PC, getting this error, Could you please help ?

Warnings when run with node 0.12.0

FYI. Ran into warnings during npm install. It might be just a version thing with karma, and pngjs. That seems pretty easy.

I'm not sure about node-gyp that is calling customFds vs. stdio.

npm WARN engine [email protected]: wanted: {"node":"~0.8 || ~0.10"} (current: {"node":"0.12.0","npm":"2.5.1"})
npm WARN engine [email protected]: wanted: {"node":"0.8.x"} (current: {"node":"0.12.0","npm":"2.5.1"})

> [email protected] install /Users/bbonner/Documents/indigo/angularjs-gulp-todo/node_modules/karma/node_modules/chokidar/node_modules/fsevents
> node-gyp rebuild

child_process: customFds option is deprecated, use stdio instead.
  SOLINK_MODULE(target) Release/.node
  SOLINK_MODULE(target) Release/.node: Finished
  CXX(target) Release/obj.target/fse/fsevents.o
  SOLINK_MODULE(target) Release/fse.node
  SOLINK_MODULE(target) Release/fse.node: Finished

> [email protected] install /Users/bbonner/Documents/indigo/angularjs-gulp-todo/node_modules/karma-phantomjs-launcher/node_modules/phantomjs
> node install.js

Downloading https://bitbucket.org/ariya/phantomjs/downloads/phantomjs-1.9.8-macosx.zip
Saving to /var/folders/36/l9drm8hd3gvcbvlblxyt54dr0000gn/T/phantomjs/phantomjs-1.9.8-macosx.zip
Receiving...
  [=======================================-] 98% 0.0s
Received 9187K total.
Extracting zip contents