org.axonframework.micrometer

Class CapacityMonitor

java.lang.Object

org.axonframework.micrometer.CapacityMonitor

All Implemented Interfaces:

MessageMonitor<Message<?>>

public class CapacityMonitor
extends Object
implements MessageMonitor<Message<?>>

Calculates capacity by tracking, within the configured time window, the average message processing time and multiplying that by the amount of messages processed.

The capacity can be more than 1 if the monitored message handler processes the messages in parallel. The capacity for a single threaded message handler will be a value between 0 and 1.

If the value for a single threaded message handler is 1 the component is active 100% of the time. This means that messages will have to wait to be processed.

Since:

4.1

Author:

Marijn van Zelst

Nested Class Summary

Nested classes/interfaces inherited from interface org.axonframework.monitoring.MessageMonitor

MessageMonitor.MonitorCallback

Method Summary

Modifier and Type	Method and Description
static CapacityMonitor	buildMonitor(String meterNamePrefix, io.micrometer.core.instrument.MeterRegistry meterRegistry) Creates a capacity monitor with the default time window 10 minutes
static CapacityMonitor	buildMonitor(String meterNamePrefix, io.micrometer.core.instrument.MeterRegistry meterRegistry, long window, TimeUnit timeUnit) Creates a capacity monitor with the default time window 10 minutes
static CapacityMonitor	buildMonitor(String meterNamePrefix, io.micrometer.core.instrument.MeterRegistry meterRegistry, long window, TimeUnit timeUnit, io.micrometer.core.instrument.Clock clock) Creates a capacity monitor with the given time window.
MessageMonitor.MonitorCallback	onMessageIngested(Message<?> message) Takes a message and returns a callback that should be used to inform the message monitor about the result of processing the message

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.axonframework.monitoring.MessageMonitor

onMessagesIngested

Method Detail

buildMonitor

public static CapacityMonitor buildMonitor(String meterNamePrefix,
                                           io.micrometer.core.instrument.MeterRegistry meterRegistry)

Creates a capacity monitor with the default time window 10 minutes

Parameters:

meterNamePrefix - The prefix for the meter name that will be created in the given meterRegistry

meterRegistry - The meter registry used to create and register the meters

Returns:

the created capacity monitor

buildMonitor

public static CapacityMonitor buildMonitor(String meterNamePrefix,
                                           io.micrometer.core.instrument.MeterRegistry meterRegistry,
                                           long window,
                                           TimeUnit timeUnit)

Creates a capacity monitor with the default time window 10 minutes

Parameters:

meterNamePrefix - The prefix for the meter name that will be created in the given meterRegistry

meterRegistry - The meter registry used to create and register the meters

window - The length of the window to measure the capacity over

timeUnit - The temporal unit of the time window

Returns:

the created capacity monitor

buildMonitor

public static CapacityMonitor buildMonitor(String meterNamePrefix,
                                           io.micrometer.core.instrument.MeterRegistry meterRegistry,
                                           long window,
                                           TimeUnit timeUnit,
                                           io.micrometer.core.instrument.Clock clock)

Creates a capacity monitor with the given time window. Uses the provided clock to measure process time per message.

Parameters:

meterNamePrefix - The prefix for the meter name that will be created in the given meterRegistry

meterRegistry - The meter registry used to create and register the meters

window - The length of the window to measure the capacity over

timeUnit - The temporal unit of the time window

clock - The clock used to measure the process time per message

Returns:

the created capacity monitor

onMessageIngested

public MessageMonitor.MonitorCallback onMessageIngested(Message<?> message)

Description copied from interface: MessageMonitor

Takes a message and returns a callback that should be used to inform the message monitor about the result of processing the message

Specified by:

onMessageIngested in interface MessageMonitor<Message<?>>

Parameters:

message - the message to monitor

Returns:

the callback