org.apache.jackrabbit.oak.spi.whiteboard

Class WhiteboardUtils

java.lang.Object

org.apache.jackrabbit.oak.spi.whiteboard.WhiteboardUtils

public class WhiteboardUtils
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	JMX_OAK_DOMAIN JMX Domain name under which Oak related JMX MBeans are registered

Constructor Summary

Constructors

Constructor and Description
WhiteboardUtils()

Method Summary

Modifier and Type	Method and Description
static <T> T	getService(Whiteboard wb, java.lang.Class<T> type) Returns the one of the currently available services from the whiteboard of the tracked type.
static <T> T	getService(Whiteboard wb, java.lang.Class<T> type, <any> predicate) Returns the one of the currently available services from the whiteboard of the tracked type.
static <T> java.util.List<T>	getServices(Whiteboard wb, java.lang.Class<T> type) Returns the currently available services from the whiteboard of the tracked type.
static <T> java.util.List<T>	getServices(Whiteboard wb, java.lang.Class<T> type, <any> predicate) Returns the currently available services from the whiteboard of the tracked type.
static <T> Registration	registerMBean(Whiteboard whiteboard, java.lang.Class<T> iface, T bean, java.lang.String type, java.lang.String name)
static <T> Registration	registerMBean(Whiteboard whiteboard, java.lang.Class<T> iface, T bean, java.lang.String type, java.lang.String name, java.util.Map<java.lang.String,java.lang.String> attrs)
static Registration	registerObserver(Whiteboard whiteboard, Observer observer)
static Registration	scheduleWithFixedDelay(Whiteboard whiteboard, java.lang.Runnable runnable, long delayInSeconds)
static Registration	scheduleWithFixedDelay(Whiteboard whiteboard, java.lang.Runnable runnable, long delayInSeconds, boolean runOnSingleClusterNode)

Methods inherited from class java.lang.Object

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

Field Detail

JMX_OAK_DOMAIN

public static final java.lang.String JMX_OAK_DOMAIN

JMX Domain name under which Oak related JMX MBeans are registered

See Also:

Constant Field Values

Constructor Detail

WhiteboardUtils

public WhiteboardUtils()

Method Detail

scheduleWithFixedDelay

public static Registration scheduleWithFixedDelay(Whiteboard whiteboard,
                                                  java.lang.Runnable runnable,
                                                  long delayInSeconds)

scheduleWithFixedDelay

public static Registration scheduleWithFixedDelay(Whiteboard whiteboard,
                                                  java.lang.Runnable runnable,
                                                  long delayInSeconds,
                                                  boolean runOnSingleClusterNode)

registerMBean

public static <T> Registration registerMBean(Whiteboard whiteboard,
                                             java.lang.Class<T> iface,
                                             T bean,
                                             java.lang.String type,
                                             java.lang.String name)

registerMBean

public static <T> Registration registerMBean(Whiteboard whiteboard,
                                             java.lang.Class<T> iface,
                                             T bean,
                                             java.lang.String type,
                                             java.lang.String name,
                                             java.util.Map<java.lang.String,java.lang.String> attrs)

registerObserver

public static Registration registerObserver(Whiteboard whiteboard,
                                            Observer observer)

getServices

public static <T> java.util.List<T> getServices(Whiteboard wb,
                                                java.lang.Class<T> type)

Returns the currently available services from the whiteboard of the tracked type. Note that the underlying tracker is closed automatically.

Parameters:

wb - the whiteboard

type - the service type

Returns:

a list of services

getService

public static <T> T getService(Whiteboard wb,
                               java.lang.Class<T> type)

Returns the one of the currently available services from the whiteboard of the tracked type. Note that the underlying tracker is closed automatically.

Returns:

one service or null

getServices

public static <T> java.util.List<T> getServices(Whiteboard wb,
                                                java.lang.Class<T> type,
                                                <any> predicate)

Returns the currently available services from the whiteboard of the tracked type. If predicate is not null the returned list is limited to the ones that match the predicate. Note that the underlying tracker is stopped automatically after the services are returned.

Parameters:

wb - the whiteboard

type - the service type

predicate - filtering predicate or null

Returns:

a list of services

getService

public static <T> T getService(Whiteboard wb,
                               java.lang.Class<T> type,
                               <any> predicate)

Returns the one of the currently available services from the whiteboard of the tracked type. If predicate is not null only a service that match the predicate is returned. Note that the underlying tracker is closed automatically.

Parameters:

wb - the whiteboard

type - the service type

predicate - filtering predicate or null

Returns:

one service or null