org.apache.nifi.util.file.monitor

Class CompoundUpdateMonitor

java.lang.Object

org.apache.nifi.util.file.monitor.CompoundUpdateMonitor

All Implemented Interfaces:

UpdateMonitor

public class CompoundUpdateMonitor
extends Object
implements UpdateMonitor

An UpdateMonitor that combines multiple UpdateMonitors such that it will indicate a change in a file only if ALL sub-monitors indicate a change. The sub-monitors will be applied in the order given and if any indicates that the state has not changed, the subsequent sub-monitors may not be given a chance to run

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	CompoundUpdateMonitor.DeferredMonitorAction

Field Summary

Fields

Modifier and Type	Field and Description
private List<UpdateMonitor>	monitors

Constructor Summary

Constructors

Constructor and Description
CompoundUpdateMonitor(UpdateMonitor first, UpdateMonitor... others)

Method Summary

Modifier and Type	Method and Description
Object	getCurrentState(Path path)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

monitors

private final List<UpdateMonitor> monitors

Constructor Detail

CompoundUpdateMonitor

public CompoundUpdateMonitor(UpdateMonitor first,
                             UpdateMonitor... others)

Method Detail

getCurrentState

public Object getCurrentState(Path path)
                       throws IOException

Specified by:

getCurrentState in interface UpdateMonitor

Throws:

IOException