kieker.monitoring.core.controller

Class MonitoringController

java.lang.Object

kieker.monitoring.core.controller.AbstractController

kieker.monitoring.core.controller.MonitoringController

All Implemented Interfaces:

IMonitoringRecordReceiver, IJMXController, IMonitoringController, IProbeController, ISamplingController, IStateController, IStateListener, ITimeSourceController, IWriterController

public final class MonitoringController
extends AbstractController
implements IMonitoringController, IStateListener

Since:

1.3

Author:

Jan Waller

Field Summary

Fields inherited from class kieker.monitoring.core.controller.AbstractController

monitoringController

Method Summary

Methods

Modifier and Type	Method and Description
boolean	activateProbe(java.lang.String pattern) Activates a probe.
void	beforeEnableMonitoring() Triggers if the monitoring is guaranteed to be enabled, but has not yet been published to other threads.
protected void	cleanup() This method should clean up.
static MonitoringController	createInstance(Configuration configuration) This is a factory method creating a new monitoring controller instance using the given configuration.
boolean	deactivateProbe(java.lang.String pattern) Deactivates a probe.
boolean	disableMonitoring() Disables monitoring.
boolean	enableMonitoring() Enables monitoring.
int	getExperimentId()
java.lang.String	getHostname() The hostname will be part of the monitoring data and allows to distinguish observations in cases where the software system is deployed on more than one host.
static IMonitoringController	getInstance()
java.lang.String	getJMXDomain()
java.lang.String	getName() Returns the name of this controller.
java.util.List<java.lang.String>	getProbePatternList() Returns the current list of patterns with a prefix indicating whether the pattern is active or not.
protected SamplingController	getSamplingController()
ITimeSource	getTimeSource() Returns the ITimeSource used in this controller.
static java.lang.String	getVersion() Return the version name of this controller instance.
int	incExperimentId() Increments the experiment ID by 1 and returns the new value.
protected void	init() This method should to the initialization work.
boolean	isDebug() Is the debug mode enabled?
boolean	isMonitoringEnabled() Returns whether monitoring is enabled or disabled/terminated.
boolean	isMonitoringTerminated() Returns whether monitoring is permanently terminated.
boolean	isProbeActivated(java.lang.String signature) Tests if a probe is active.
boolean	newMonitoringRecord(IMonitoringRecord record) Called for each new record to write it out to the pre-configured target (e.g., file system, database, or messaging queue).
boolean	removeScheduledSampler(ScheduledSamplerJob sampler) Stops future executions of the given periodic ScheduledSamplerJob .
ScheduledSamplerJob	schedulePeriodicSampler(ISampler sampler, long initialDelay, long period, java.util.concurrent.TimeUnit timeUnit) Schedules the given ISampler with given initial delay, and period.
boolean	sendMetadataAsRecord() This method sends the meta data (like the controller and host name, the experiment ID, etc.) as a record.
void	setExperimentId(int newExperimentID) Sets the experiment ID to the given value.
void	setProbePatternList(java.util.List<java.lang.String> patternList) Overwrites the current list of patterns with a new pattern list.
boolean	terminateMonitoring() Permanently terminates monitoring.
java.lang.String	toString() This method is used to log the status of the controllers to the console.
void	waitForTermination(long timeoutInMs) Waits for the termination of the monitoring controller.

Methods inherited from class kieker.monitoring.core.controller.AbstractController

createAndInitialize, isTerminated, setMonitoringController, terminate

Methods inherited from class java.lang.Object

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

Method Detail

createInstance

public static final MonitoringController createInstance(Configuration configuration)

This is a factory method creating a new monitoring controller instance using the given configuration.

Parameters:

configuration - The configuration for the new controller.

Returns:

A new controller.

getVersion

public static final java.lang.String getVersion()

Return the version name of this controller instance.

Returns:

the version name

beforeEnableMonitoring

public void beforeEnableMonitoring()

Description copied from interface: IStateListener

Triggers if the monitoring is guaranteed to be enabled, but has not yet been published to other threads. This method is provided especially to guarantee that the meta data record is sent before any other record.

Specified by:

beforeEnableMonitoring in interface IStateListener

init

protected final void init()

Description copied from class: AbstractController

This method should to the initialization work.

Specified by:

init in class AbstractController

cleanup

protected final void cleanup()

Description copied from class: AbstractController

This method should clean up.

Specified by:

cleanup in class AbstractController

toString

public final java.lang.String toString()

Description copied from interface: IMonitoringController

This method is used to log the status of the controllers to the console. It is included in this interface to ensure its publication over JMX.

Specified by:

toString in interface IMonitoringController

Specified by:

toString in class AbstractController

Returns:

a String representation of the current controller

sendMetadataAsRecord

public final boolean sendMetadataAsRecord()

This method sends the meta data (like the controller and host name, the experiment ID, etc.) as a record.

Specified by:

sendMetadataAsRecord in interface IMonitoringController

Returns:

true on success; false in case of an error.

getSamplingController

protected SamplingController getSamplingController()

terminateMonitoring

public final boolean terminateMonitoring()

Description copied from interface: IStateController

Permanently terminates monitoring.

Specified by:

terminateMonitoring in interface IStateController

Returns:

true if now terminated; false if already terminated

See Also:

IStateController.isMonitoringTerminated()

isMonitoringTerminated

public final boolean isMonitoringTerminated()

Description copied from interface: IStateController

Returns whether monitoring is permanently terminated.

Specified by:

isMonitoringTerminated in interface IStateController

Returns:

true if monitoring is permanently terminated, false if monitoring is enabled or disabled.

See Also:

IStateController.terminateMonitoring()

enableMonitoring

public final boolean enableMonitoring()

Description copied from interface: IStateController

Enables monitoring.

Specified by:

enableMonitoring in interface IStateController

Returns:

true if monitoring is enabled, false otherwise

disableMonitoring

public final boolean disableMonitoring()

Description copied from interface: IStateController

Disables monitoring. If monitoring is disabled, the MonitoringController simply pauses. Furthermore, probes should stop collecting new data and monitoring writers stop should stop writing existing data.

Specified by:

disableMonitoring in interface IStateController

Returns:

true if monitoring is disabled, false otherwise

isMonitoringEnabled

public final boolean isMonitoringEnabled()

Description copied from interface: IStateController

Returns whether monitoring is enabled or disabled/terminated.

Specified by:

isMonitoringEnabled in interface IStateController

Returns:

true of monitoring is enabled, false if monitoring is disabled or terminated.

See Also:

IStateController.disableMonitoring(), IStateController.enableMonitoring()

isDebug

public final boolean isDebug()

Description copied from interface: IStateController

Is the debug mode enabled?

Debug mode is for internal use only and changes a few internal id generation mechanisms to enable easier debugging. Additionally, it is possible to enable debug logging in the settings of the used logger.

Specified by:

isDebug in interface IStateController

Returns:

debug mode

getName

public final java.lang.String getName()

Description copied from interface: IStateController

Returns the name of this controller.

Specified by:

getName in interface IStateController

Returns:

String

getHostname

public final java.lang.String getHostname()

Description copied from interface: IStateController

The hostname will be part of the monitoring data and allows to distinguish observations in cases where the software system is deployed on more than one host. When you want to distinguish multiple Virtual Machines on one host, you* have to set the hostname manually in the Configuration.

Specified by:

getHostname in interface IStateController

Returns:

The hostname.

incExperimentId

public final int incExperimentId()

Description copied from interface: IStateController

Increments the experiment ID by 1 and returns the new value.

Specified by:

incExperimentId in interface IStateController

Returns:

experimentID

setExperimentId

public final void setExperimentId(int newExperimentID)

Description copied from interface: IStateController

Sets the experiment ID to the given value.

Specified by:

setExperimentId in interface IStateController

Parameters:

newExperimentID - The new ID.

getExperimentId

public final int getExperimentId()

Specified by:

getExperimentId in interface IStateController

Returns:

The experiment ID.

newMonitoringRecord

public final boolean newMonitoringRecord(IMonitoringRecord record)

Description copied from interface: IWriterController

Called for each new record to write it out to the pre-configured target (e.g., file system, database, or messaging queue). This method could invoke the given record's methods declared in IMonitoringRecord and thus alter its loggingTimestamp property.

Notice, that this method should not throw an exception, but indicate an error by the return value false.

Specified by:

newMonitoringRecord in interface IMonitoringRecordReceiver

Specified by:

newMonitoringRecord in interface IWriterController

Parameters:

record - the record.

Returns:

true on success; false in case of an error.

waitForTermination

public void waitForTermination(long timeoutInMs)
                        throws java.lang.InterruptedException

Description copied from interface: IWriterController

Waits for the termination of the monitoring controller. The termination must be previously triggered by terminateMonitoring().

Specified by:

waitForTermination in interface IWriterController

Parameters:

timeoutInMs - timeout in milliseconds to wait (a timeout of 0 means to wait forever)

Throws:

java.lang.InterruptedException - if the calling thread was interrupted while waiting for the termination

schedulePeriodicSampler

public final ScheduledSamplerJob schedulePeriodicSampler(ISampler sampler,
                                          long initialDelay,
                                          long period,
                                          java.util.concurrent.TimeUnit timeUnit)

Description copied from interface: ISamplingController

Schedules the given ISampler with given initial delay, and period.

Specified by:

schedulePeriodicSampler in interface ISamplingController

Parameters:

sampler - The sampler to schedule.

initialDelay - The initial delay.

period - The period.

timeUnit - The time unit which determines how to interpret the given parameter.

Returns:

a ScheduledSamplerJob as a handler for removing the scheduled sampler later on by using the method ISamplingController.removeScheduledSampler(ScheduledSamplerJob).

removeScheduledSampler

public final boolean removeScheduledSampler(ScheduledSamplerJob sampler)

Description copied from interface: ISamplingController

Stops future executions of the given periodic ScheduledSamplerJob .

Specified by:

removeScheduledSampler in interface ISamplingController

Parameters:

sampler - The sampler to be removed.

Returns:

true if the sensor is not registered

getTimeSource

public final ITimeSource getTimeSource()

Description copied from interface: ITimeSourceController

Returns the ITimeSource used in this controller.

Specified by:

getTimeSource in interface ITimeSourceController

Returns:

ITimeSource

getJMXDomain

public final java.lang.String getJMXDomain()

Specified by:

getJMXDomain in interface IJMXController

Returns:

the JMX domain used

activateProbe

public final boolean activateProbe(java.lang.String pattern)

Description copied from interface: IProbeController

Activates a probe.

Specified by:

activateProbe in interface IProbeController

Parameters:

pattern - pattern for the probe

Returns:

true on success

deactivateProbe

public final boolean deactivateProbe(java.lang.String pattern)

Description copied from interface: IProbeController

Deactivates a probe.

Specified by:

deactivateProbe in interface IProbeController

Parameters:

pattern - pattern for the probe

Returns:

true on success

isProbeActivated

public boolean isProbeActivated(java.lang.String signature)

Description copied from interface: IProbeController

Tests if a probe is active. This test is ignorant of the fact whether monitoring itself is enabled/disabled/terminated.

Specified by:

isProbeActivated in interface IProbeController

Parameters:

signature - signature of the probe

Returns:

true if the probe with this signature is active

setProbePatternList

public void setProbePatternList(java.util.List<java.lang.String> patternList)

Description copied from interface: IProbeController

Overwrites the current list of patterns with a new pattern list.

Specified by:

setProbePatternList in interface IProbeController

Parameters:

patternList - list of strings with patterns where each string starts either with a + or -. The list can be empty (in which case the internal pattern list and the internal cache are cleared) - but not null.

getProbePatternList

public java.util.List<java.lang.String> getProbePatternList()

Description copied from interface: IProbeController

Returns the current list of patterns with a prefix indicating whether the pattern is active or not.

Specified by:

getProbePatternList in interface IProbeController

Returns:

list of strings with patterns where each string starts either with a + or -

getInstance

public static final IMonitoringController getInstance()