Use separate logger for PulsarListener exceptions (#1039)

This creates a separate logger for DefaultPulsarMessageListenerContainer
that it uses to log exceptions thrown from listener callback methods.

The exceptions are still logged at debug level in order to not change
behavior in a patch release. However, the log category used by the logger
can then be set to debug level but not spam the logs with the other
debug statements in the listener container.

Also, adds exception logging to the batch listener invocation using
the same listener error logger as the record listener invocation.

Resolves #1008

Author: onobc

spring-pulsar/src/main/java/org/springframework/pulsar/listener/DefaultPulsarMessageListenerContainer.java

@@ -111,6 +111,9 @@ public class DefaultPulsarMessageListenerContainer<T> extends AbstractPulsarMess
 
 	private final Condition pausedCondition = this.lockOnPause.newCondition();
 
+	private final LogAccessor listenerErrorLogger = new LogAccessor(
+			"%s-ListenerErrors".formatted(DefaultPulsarMessageListenerContainer.class.getName()));
+
 	public DefaultPulsarMessageListenerContainer(PulsarConsumerFactory<? super T> pulsarConsumerFactory,
 			PulsarContainerProperties pulsarContainerProperties) {
 		super(pulsarConsumerFactory, pulsarContainerProperties);
@@ -629,7 +632,7 @@ else if (this.listener != null) {
 				inRetryMode.compareAndSet(true, false);
 			}
 			catch (RuntimeException e) {
-				DefaultPulsarMessageListenerContainer.this.logger.debug(e,
+				DefaultPulsarMessageListenerContainer.this.listenerErrorLogger.debug(e,
 						() -> "Error dispatching the message to the listener.");
 				if (this.pulsarConsumerErrorHandler != null) {
 					invokeRecordListenerErrorHandler(inRetryMode, message, e, txn);
@@ -642,9 +645,9 @@ else if (this.ackMode.equals(AckMode.BATCH)) {
 						this.nackableMessages.add(message.getMessageId());
 					}
 					else {
-						throw new IllegalStateException("Exception occurred and message %s was not auto-nacked; "
-								+ "switch to AckMode BATCH or RECORD to enable auto-nacks"
-									.formatted(message.getMessageId()),
+						throw new IllegalStateException(
+								"Exception occurred and message %".formatted(message.getMessageId())
+										+ "was not auto-nacked; switch to AckMode BATCH or RECORD to enable auto-nacks",
 								e);
 					}
 				}
@@ -713,6 +716,8 @@ private List<Message<T>> doInvokeBatchListener(Messages<T> messages, List<Messag
 				return Collections.emptyList();
 			}
 			catch (RuntimeException ex) {
+				DefaultPulsarMessageListenerContainer.this.listenerErrorLogger.debug(ex,
+						() -> "Error dispatching the messages to the batch listener.");
 				if (this.pulsarConsumerErrorHandler != null) {
 					return invokeBatchListenerErrorHandler(inRetryMode, messagesPendingInBatch, messageList, ex, txn);
 				}