com.hazelcast.internal.diagnostics

Class InvocationPlugin

java.lang.Object

com.hazelcast.internal.diagnostics.DiagnosticsPlugin

com.hazelcast.internal.diagnostics.InvocationPlugin

public class InvocationPlugin
extends DiagnosticsPlugin

A DiagnosticsPlugin that displays all invocations that have been executing for some time.

It will display the current invocations and the invocation history. For example, if an entry processor has been running for 5 minutes and the SAMPLE_PERIOD_SECONDS is set to 1 minute, then there will be 5 samples for that given invocation. This is useful to track which operations have been slow over a longer period of time.

Field Summary

Fields

Modifier and Type	Field and Description
static HazelcastProperty	SAMPLE_PERIOD_SECONDS The sample period in seconds.
static HazelcastProperty	SLOW_MAX_COUNT The maximum number of slow invocations to print.
static HazelcastProperty	SLOW_THRESHOLD_SECONDS The threshold in seconds to consider an invocation to be slow.

Fields inherited from class com.hazelcast.internal.diagnostics.DiagnosticsPlugin

logger

Constructor Summary

Constructors

Constructor and Description
InvocationPlugin(NodeEngineImpl nodeEngine)

Method Summary

Modifier and Type	Method and Description
long	getPeriodMillis() Returns the period of executing the monitor in millis.
void	onStart()
void	run(DiagnosticsLogWriter writer)

Methods inherited from class java.lang.Object

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

Field Detail

SAMPLE_PERIOD_SECONDS

public static final HazelcastProperty SAMPLE_PERIOD_SECONDS

The sample period in seconds.

If set to 0, the plugin is disabled.

SLOW_THRESHOLD_SECONDS

public static final HazelcastProperty SLOW_THRESHOLD_SECONDS

The threshold in seconds to consider an invocation to be slow.

SLOW_MAX_COUNT

public static final HazelcastProperty SLOW_MAX_COUNT

The maximum number of slow invocations to print.

Constructor Detail

InvocationPlugin

public InvocationPlugin(NodeEngineImpl nodeEngine)

Method Detail

getPeriodMillis

public long getPeriodMillis()

Description copied from class: DiagnosticsPlugin

Returns the period of executing the monitor in millis.

If a monitor is disabled, 0 is returned.

If a monitor should run only once, a negative value is returned. This is useful for 'static' monitors like the SystemPropertiesPlugin that run at the beginning of a log file but their contents will not change.

Specified by:

getPeriodMillis in class DiagnosticsPlugin

Returns:

the period in millis.

onStart

public void onStart()

Specified by:

onStart in class DiagnosticsPlugin

run

public void run(DiagnosticsLogWriter writer)

Specified by:

run in class DiagnosticsPlugin