org.echarts.monitor
Class MachineMonitorEventFilter

java.lang.Object
  org.echarts.monitor.MachineMonitorEventFilter

All Implemented Interfaces:

java.io.Serializable

public class MachineMonitorEventFilter
extends java.lang.Object
implements java.io.Serializable

Event filter used by event monitors when determining whether or not to log an event. A monitor event filter string is provided as a constructor argument and parsed to form the filter. The filter string grammar is: A filter string is a list of filter disjuncts separated by '|'. If an event passes through at least one filter disjunct then it is defined to have passed through the entire filter. If a 'null' filter string is specified, then all events are defined to pass through the filter. FILTER_STRING ::= FILTER_DISJUNCT ( '|' FILTER_DISJUNCT )* A filter disjunct consists of a series of class filters. If an event passes through all class filters then it is defined to have passed through the filter disjunct. FILTER_DISJUNCT ::= ( CLASS_FILTER )+ A class filter consists of a 'pass' term, either '+' or '-', a (fully qualified) class name, and an optional list of property filters. If the pass term is '+', then the event is defined to have passed through the class filter is the event class is a subclass of the class specified by the class name, and if the event passes through all of the property filters. If the pass term is '-', then the event is defined to have passed through the filter if it would have not passed if the pass term were '+'. CLASS_FILTER ::= PASS CLASS_NAME ( PROP_FILTER )* A property filter consists of a property name and a regular expression. An event is defined to have passed through the property filter if the value of the named event property matches the regular expression. The regular expression conforms to the sytax and semantics used by the org.apache.regexp package. PROP_FILTER ::= '?' PROP_NAME '=' '(' REGEXP ')'

See Also:

Serialized Form

Field Summary

static long

serialVersionUID

Constructor Summary

MachineMonitorEventFilter(java.lang.String filterString)

Method Summary

boolean

passes(MachineMonitorEvent event) Specified event must pass through at least one of the filter disjuncts.

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

public static final long serialVersionUID

See Also:

Constant Field Values

Constructor Detail

MachineMonitorEventFilter

public MachineMonitorEventFilter(java.lang.String filterString)
                          throws MalformedEventFilterStringException

Throws:

MalformedEventFilterStringException

Method Detail

passes

public boolean passes(MachineMonitorEvent event)

Specified event must pass through at least one of the filter disjuncts.