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package io.mats3.matsbrokermonitor.activemq;
import java.io.Closeable;
import java.time.Instant;
import java.util.Optional;
import java.util.OptionalDouble;
import java.util.concurrent.ConcurrentNavigableMap;
import java.util.function.Consumer;
/**
* @author Endre Stølsvik 2021-12-28 02:31 - http://stolsvik.com/, [email protected]
*/
public interface ActiveMqBrokerStatsQuerier extends Closeable {
/**
* @param nodeId
* the internal nodeId to decide whether an update came from "this node" or not, used for
* {@link ActiveMqBrokerStatsEvent#isStatsEventOriginatedOnThisNode()}. Must be different for each
* instance connected to the same ActiveMQ instance. Not really needed, since it works just nice with a
* random id (which it uses default), but it can be valuable for debugging.
*/
void setNodeId(String nodeId);
void start();
void close();
void setMatsDestinationPrefix(String matsDestinationPrefix);
void registerListener(Consumer listener);
interface ActiveMqBrokerStatsEvent {
/**
* @return the correlationId if this is an event in response to an invocation of
* {@link #forceUpdate(String, boolean)}
*/
Optional getCorrelationId();
/**
* @return true if this is an event in response to an invocation of
* {@link #forceUpdate(String, boolean)}, and the 'fullUpdate' parameter was true.
*/
boolean isFullUpdate();
/**
* @return true if this event was the result from a request sent from this node.
*/
boolean isStatsEventOriginatedOnThisNode();
/**
* @return the nodeId which performed the request which resulted in this update event - the nodeId is a random
* string unless set using {@link ActiveMqBrokerStatsQuerier#setNodeId(String)}.
*/
Optional getOriginatingNodeId();
/**
* @return the number of milliseconds between the statistics request(s) were started, to the (last) response was
* received.
*/
OptionalDouble getStatsRequestReplyLatencyMillis();
}
/**
* Requests ASAP update.
*
* @param correlationId
* this is only used to propagate through to the update event.
* @param fullUpdate
* this is only used to propagate through to the update event.
*/
void forceUpdate(String correlationId, boolean fullUpdate);
Optional getCurrentBrokerStatsDto();
ConcurrentNavigableMap getCurrentDestinationStatsDtos();
/**
* NOTE: Explanations from
* [email protected]
* mail-archive: "Re: Topic counts explanation", or
* Stackoverflow: What do some of the fields returned from
* ActiveMQ.Agent query mean?, or
* ActiveMQ Docs: How do I find the Size of
* a Queue
*/
class CommonStatsDto {
Instant statsReceived;
String brokerId;
String brokerName;
Instant brokerTime;
/**
* The number of messages that currently reside in the queue.
*
* (Endre: Seems to be {@link #enqueueCount} - {@link #dequeueCount}).
*/
long size;
/**
* The number of messages that have been written to the queue over the lifetime of the queue (since last
* restart).
*/
long enqueueCount;
/**
* The number of messages that have been successfully (i.e., they’ve been acknowledged from the consumer) read
* off the queue over the lifetime of the queue (since last restart).
*/
long dequeueCount;
/**
* The number of messages that were not delivered because they were expired (since last restart).
*/
long expiredCount;
/**
* The number of messages that have been dispatched (sent) to the consumer over the lifetime of the queue. Note
* that dispatched messages may not have all been acknowledged (since last restart).
*
* (Endre: This number can evidently be higher than {@link #enqueueCount}, which I assume means that
* redeliveries are included.)
*/
long dispatchCount;
/**
* The number of messages that have been dispatched and are currently awaiting acknowledgment from the consumer.
* So as this number decreases, the DequeueCount increases.
*
* (Endre: This number is included in the {@link #size} number, as inflight messages are not yet dequeued).
*/
long inflightCount;
long producerCount;
long consumerCount;
/**
* The minimum amount of time that messages remained enqueued.
*/
double minEnqueueTime;
/**
* On average, the amount of time (ms) that messages remained enqueued. Or average time it is taking the
* consumers to successfully process messages.
*/
double averageEnqueueTime;
/**
* The maximum amount of time that messages remained enqueued.
*/
double maxEnqueueTime;
long averageMessageSize;
long messagesCached;
long memoryUsage;
long memoryLimit;
int memoryPercentUsage;
String getCommonToString() {
return "statsReceivedTimeMillis=" + statsReceived +
", brokerId='" + brokerId + '\'' +
", brokerName='" + brokerName + '\'' +
", brokerTime='" + brokerTime + '\'' +
", size=" + size +
", enqueueCount=" + enqueueCount +
", dequeueCount=" + dequeueCount +
", expiredCount=" + expiredCount +
", dispatchCount=" + dispatchCount +
", inflightCount=" + inflightCount +
", producerCount=" + producerCount +
", consumerCount=" + consumerCount +
", minEnqueueTime=" + minEnqueueTime +
", averageEnqueueTime=" + averageEnqueueTime +
", maxEnqueueTime=" + maxEnqueueTime +
", averageMessageSize=" + averageMessageSize +
", messagesCached=" + messagesCached +
", memoryUsage=" + memoryUsage +
", memoryLimit=" + memoryLimit +
", memoryPercentUsage=" + memoryPercentUsage;
}
String getCommonJson() {
return " \"statsReceivedTimeMillis\"=" + statsReceived + "\n" +
" \"brokerId\"=\"" + brokerId + '"' + "\n" +
" \"brokerName\"=\"" + brokerName + '"' + "\n" +
" \"brokerTime\"=\"" + brokerTime + '"' + "\n" +
" \"size\"=" + size + "\n" +
" \"enqueueCount\"=" + enqueueCount + "\n" +
" \"dequeueCount\"=" + dequeueCount + "\n" +
" \"expiredCount\"=" + expiredCount + "\n" +
" \"dispatchCount\"=" + dispatchCount + "\n" +
" \"inflightCount\"=" + inflightCount + "\n" +
" \"producerCount\"=" + producerCount + "\n" +
" \"consumerCount\"=" + consumerCount + "\n" +
" \"minEnqueueTime\"=" + minEnqueueTime + "\n" +
" \"averageEnqueueTime\"=" + averageEnqueueTime + "\n" +
" \"maxEnqueueTime\"=" + maxEnqueueTime + "\n" +
" \"averageMessageSize\"=" + averageMessageSize + "\n" +
" \"messagesCached\"=" + messagesCached + "\n" +
" \"memoryUsage\"=" + memoryUsage + "\n" +
" \"memoryLimit\"=" + memoryLimit + "\n" +
" \"memoryPercentUsage\"=" + memoryPercentUsage + "\n";
}
}
class BrokerStatsDto extends CommonStatsDto {
long storeUsage;
long storeLimit;
int storePercentUsage;
long tempUsage;
long tempLimit;
int tempPercentUsage;
String stompSsl;
String ssl;
String stomp;
String openwire;
String vm;
String dataDirectory;
@Override
public String toString() {
return "BrokerStatsDto{" +
getCommonToString() +
", storeUsage=" + storeUsage +
", storeLimit=" + storeLimit +
", storePercentUsage=" + storePercentUsage +
", tempUsage=" + tempUsage +
", tempLimit=" + tempLimit +
", tempPercentUsage=" + tempPercentUsage +
", stompSsl='" + stompSsl + '\'' +
", ssl='" + ssl + '\'' +
", stomp='" + stomp + '\'' +
", openwire='" + openwire + '\'' +
", vm='" + vm + '\'' +
", dataDirectory='" + dataDirectory + '\'' +
'}';
}
public String toJson() {
return "{\n" + getCommonJson() +
" \"storeUsage\"=" + storeUsage + "\n" +
" \"storeLimit\"=" + storeLimit + "\n" +
" \"storePercentUsage\"=" + storePercentUsage + "\n" +
" \"tempUsage\"=" + tempUsage + "\n" +
" \"tempLimit\"=" + tempLimit + "\n" +
" \"tempPercentUsage\"=" + tempPercentUsage + "\n" +
" \"stompSsl\"=\"" + stompSsl + '"' + "\n" +
" \"ssl\"=\"" + ssl + '"' + "\n" +
" \"stomp\"=\"" + stomp + '"' + "\n" +
" \"openwire\"=\"" + openwire + '"' + "\n" +
" \"vm\"=\"" + vm + '"' + "\n" +
" \"dataDirectory\"=\"" + dataDirectory + '"' + "\n" +
'}';
}
}
class DestinationStatsDto extends CommonStatsDto {
String destinationName;
// Only present if there is a head message present (I created this feature in ActiveMQ!)
Optional firstMessageTimestamp;
@Override
public String toString() {
return "DestinationStatsDto{" +
", destinationName='" + destinationName + '\'' +
", firstMessageTimestamp='" + firstMessageTimestamp + '\'' +
", " +
getCommonToString() +
'}';
}
public String toJson() {
return "{\n" +
" \"destinationName\"=\"" + destinationName + "\"\n" +
" \"firstMessageTimestamp\"=" +
(firstMessageTimestamp.map(instant -> "\"" + instant + "\"").orElse("null")) + "\n" +
getCommonJson() +
'}';
}
}
}
