A Comparison of Bug Finding Tools for Java
It talks about the following tools:
- ESC/Java 2
Happy debugging !
- ESC/Java 2
passes successfully the 3 tests listed above in the article:The principals ?
- "multiple new instances in set"
- "equal to same object from other session"
- "collections intact after saving"
The first time equals or hashCode is called, we check if theAnd there is the sample code too using java.rmi.dgc.VMID !
primary key (here getUserId()) is present or not.
If yes: we use it in equals/hashcode
If no: we use a UID (here _uidInEquals) during the entire life of this
instance even when latter on this instance is assigned a primary key.
Hadoop is a framework for running applications on large clusters of commodity hardware. The Hadoop framework transparently provides applications both reliability and data motion. Hadoop implements a computational paradigm named map/reduce, where the application is divided into many small fragments of work, each of which may be executed or reexecuted on any node in the cluster.
Google has built the following four �lines of defense� against invalid clicks: pre-filtering, online filtering, automated offline detection and manual offline detection, in that order. Google deploys different detection methods in each of these stages: the rule-based and anomaly-based approaches in the pre-filtering and the filtering stages, the combination of all the three approaches in the automated offline detection stage, and the anomaly-based approach in the offline manual inspection stage.