| ContentCollector | |
| ExamReactor | Part of the Plumbing Level API. |
| StagedExamReactor | Separates logical regression invocations from underlying reactor strategy. |
| StagedExamReactorFactory |
| DefaultExamReactor | Reactor decouples org.ops4j.pax.exam.TestContainer state from the observer. |
| DefaultExamSystem | DefaultExamSystem represents the default implementation of ExamSystem. |
| PaxExamRuntime | Pax Exam runtime. |