1.查找OSGI bundle
http://ebr.springsource.com/repository/app/search
2.查找jar
http://www.docjar.com/
3.查找open source 源码sdk：
http://grepcode.com/file/repo1.maven.org/maven2/org.apache.camel/camel-core/2.5.0/org/apache/camel/impl/DefaultCamelContext.java#DefaultCamelContext
