Add Cache for event writer. (#1032) #2354

Job	Run time
check	48s
scan	5s
test (HiveMQIntegrationTest)	1m 9s
test (CleanSessionTest)	4m 21s
test (ProxyTLSTest)	2m 7s
test (ProxyTest)	4m 9s
test (BasicAuthenticationProxyTest)	1m 41s
test (ProxyToPulsarTlsTest)	1m 32s
test (TokenAuthenticationProxyTest)	1m 39s
test (AuthorizationProxyTest)	1m 27s
test (BasicAuthenticationTest)	1m 22s
test (TLSTest)	1m 3s
test (SimpleIntegrationTest)	1m 22s
test (AuthorizationTest)	1m 19s
test (TokenAuthenticationTest)	1m 27s
test (MQTT5SessionExpireIntervalTest)	3m 12s
test (MQTT5ProxyIntegrationTest)	1m 56s
test (MQTT5AuthorizationProxyReasonCodeOnAllAckTest)	4m 36s
test (MQTT5ClientReceiveMaximumTest)	2m 7s
test (MQTT5CleanStartTest)	1m 18s
test (MQTT5ConnectRelatedProtocolTest)	1m 26s
test (MQTT5SessionExpireIntervalTest)	2m 40s
test (MQTT5IntegrationTest)	1m 21s
test (MQTT5PublishRelatedProtocolTest)	1m 25s
test (MQTT5ReasonCodeOnAllACKTest)	1m 42s
test (MQTT5AuthorizationReasonCodeOnAllAckTest)	1m 4s
test (MQTT5ServerReceiveMaximumTest)	1m 12s
test (MQTT5ClientReceiveMaximumTest)	2m 6s
test (MQTT5BatchMessageTest)	1m 30s
test (AdapterChannelTest)	1m 40s
test (ConfigurationCompatibilityTest)	1m 4s
test (MqttProxyAdapterTest)	2m 39s
test (EventCenterTest)	1m 31s
test (MessageConverTest)	1m 25s
test (PacketIdGeneratorTest)	1m 8s
test (ConfigurationUtilsTest)	56s
test (PulsarTopicUtilsTest)	52s
test (MqttMessageUtilsTest)	1m 1s
test (TopicFilterImplTest)	54s
test (MQTTSubscriptionManagerTest)	1m 6s
test (MessageAckTrackerTest)	1m 8s
test (MQTTMetricsCollectorTest)	55s
test (MQTTMetricsProviderTest)	54s
build	0s
	1h 10m 19s

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