some cosmetic improvements of the reference

Author: nathan.xu

spring-kafka-docs/src/main/antora/modules/ROOT/pages/kafka/configuring-topics.adoc

@@ -43,7 +43,7 @@ include::{kotlin-examples}/topics/Config.kt[tag=brokerProps]
 ----
 ======
 
-Starting with version 2.7, you can declare multiple `NewTopic` s in a single `KafkaAdmin.NewTopics` bean definition:
+Starting with version 2.7, you can declare multiple `NewTopic`+++s+++ in a single `KafkaAdmin.NewTopics` bean definition:
 
 [tabs]
 ======
@@ -63,7 +63,7 @@ include::{kotlin-examples}/topics/Config.kt[tag=newTopicsBean]
 ======
 
 
-IMPORTANT: When using Spring Boot, a `KafkaAdmin` bean is automatically registered so you only need the `NewTopic` (and/or `NewTopics`) `@Bean` s.
+IMPORTANT: When using Spring Boot, a `KafkaAdmin` bean is automatically registered so you only need the `NewTopic` (and/or `NewTopics`) `@Bean`+++s+++.
 
 By default, if the broker is not available, a message is logged, but the context continues to load.
 You can programmatically invoke the admin's `initialize()` method to try again later.

spring-kafka-docs/src/main/antora/modules/ROOT/pages/kafka/connecting.adoc

@@ -1,12 +1,12 @@
 [[connecting]]
 = Connecting to Kafka
 
-* `KafkaAdmin` - see <<configuring-topics>>
+* `KafkaAdmin` - see xref:kafka/configuring-topics.adoc[Configuring Topics]
 * `ProducerFactory` - see xref:kafka/sending-messages.adoc[Sending Messages]
 * `ConsumerFactory` - see xref:kafka/receiving-messages.adoc[Receiving Messages]
 
 Starting with version 2.5, each of these extends `KafkaResourceFactory`.
-This allows changing the bootstrap servers at runtime by adding a `Supplier<String>` to their configuration:  `setBootstrapServersSupplier(() -> ...)`.
+This allows changing the bootstrap servers at runtime by adding a `Supplier<String>` to their configuration:  `setBootstrapServersSupplier(() +++->+++ ...)`.
 This will be called for all new connections to get the list of servers.
 Consumers and Producers are generally long-lived.
 To close existing Producers, call `reset()` on the `DefaultKafkaProducerFactory`.
@@ -15,7 +15,7 @@ To close existing Consumers, call `stop()` (and then `start()`) on the `KafkaLis
 For convenience, the framework also provides an `ABSwitchCluster` which supports two sets of bootstrap servers; one of which is active at any time.
 Configure the `ABSwitchCluster` and add it to the producer and consumer factories, and the `KafkaAdmin`, by calling `setBootstrapServersSupplier()`.
 When you want to switch, call `primary()` or `secondary()` and call `reset()` on the producer factory to establish new connection(s); for consumers, `stop()` and `start()` all listener containers.
-When using `@KafkaListener` s, `stop()` and `start()` the `KafkaListenerEndpointRegistry` bean.
+When using `@KafkaListener`+++s+++, `stop()` and `start()` the `KafkaListenerEndpointRegistry` bean.
 
 See the Javadocs for more information.
 

spring-kafka-docs/src/main/antora/modules/ROOT/pages/kafka/sending-messages.adoc

@@ -42,14 +42,21 @@ List<PartitionInfo> partitionsFor(String topic);
 
 <T> T execute(ProducerCallback<K, V, T> callback);
 
-// Flush the producer.
+<T> T executeInTransaction(OperationsCallback<K, V, T> callback);
 
+// Flush the producer.
 void flush();
 
 interface ProducerCallback<K, V, T> {
 
     T doInKafka(Producer<K, V> producer);
 
+}
+
+interface OperationsCallback<K, V, T> {
+
+    T doInOperations(KafkaOperations<K, V> operations);
+
 }
 ----
 
@@ -62,7 +69,7 @@ The `sendDefault` API requires that a default topic has been provided to the tem
 
 The API takes in a `timestamp` as a parameter and stores this timestamp in the record.
 How the user-provided timestamp is stored depends on the timestamp type configured on the Kafka topic.
-If the topic is configured to use `CREATE_TIME`, the user specified timestamp is recorded (or generated if not specified).
+If the topic is configured to use `CREATE_TIME`, the user-specified timestamp is recorded (or generated if not specified).
 If the topic is configured to use `LOG_APPEND_TIME`, the user-specified timestamp is ignored and the broker adds in the local broker time.
 
 The `metrics` and `partitionsFor` methods delegate to the same methods on the underlying https://kafka.apache.org/20/javadoc/org/apache/kafka/clients/producer/Producer.html[`Producer`].

spring-kafka-docs/src/main/antora/modules/ROOT/pages/quick-tour.adoc

@@ -47,7 +47,7 @@ Gradle::
 +
 [source,groovy,subs="+attributes",role="secondary"]
 ----
-compile 'org.springframework.kafka:spring-kafka'
+implementation 'org.springframework.kafka:spring-kafka'
 ----
 ======
 
@@ -58,7 +58,7 @@ However, the quickest way to get started is to use https://start.spring.io[start
 
 This quick tour works with the following versions:
 
-* Apache Kafka Clients 3.5.x
+* Apache Kafka Clients 3.6.x
 * Spring Framework 6.1.x
 * Minimum Java version: 17
 
@@ -124,11 +124,11 @@ include::{kotlin-examples}/started/producer/Application.kt[tag=startedProducer]
 === With Java Configuration (No Spring Boot)
 
 IMPORTANT: Spring for Apache Kafka is designed to be used in a Spring Application Context.
-For example, if you create the listener container yourself outside of a Spring context, not all functions will work unless you satisfy all of the `...Aware` interfaces that the container implements.
+For example, if you create the listener container yourself outside of a Spring context, not all functions will work unless you satisfy all of the `+++...+++Aware` interfaces that the container implements.
 
 Here is an example of an application that does not use Spring Boot; it has both a `Consumer` and `Producer`.
 
-.Without Boot
+.Without Spring Boot
 [tabs]
 ======
 Java::

spring-kafka-docs/src/main/java/org/springframework/kafka/jdocs/started/noboot/Sender.java

@@ -29,20 +29,20 @@
 // tag::startedNoBootSender[]
 public class Sender {
 
-	public static void main(String[] args) {
-		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(Config.class);
-		context.getBean(Sender.class).send("test", 42);
-	}
+    public static void main(String[] args) {
+        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(Config.class);
+        context.getBean(Sender.class).send("test", 42);
+    }
 
-	private final KafkaTemplate<Integer, String> template;
+    private final KafkaTemplate<Integer, String> template;
 
-	public Sender(KafkaTemplate<Integer, String> template) {
-		this.template = template;
-	}
+    public Sender(KafkaTemplate<Integer, String> template) {
+        this.template = template;
+    }
 
-	public void send(String toSend, int key) {
-		this.template.send("topic1", key, toSend);
-	}
+    public void send(String toSend, int key) {
+        this.template.send("topic1", key, toSend);
+    }
 
 }
 // end::startedNoBootSender[]

spring-kafka-docs/src/main/java/org/springframework/kafka/jdocs/topics/Config.java

@@ -16,8 +16,8 @@
 
 package org.springframework.kafka.jdocs.topics;
 
-import java.util.Arrays;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 
 import org.apache.kafka.clients.admin.AdminClientConfig;
@@ -67,9 +67,9 @@ public NewTopic topic2() {
     @Bean
     public NewTopic topic3() {
         return TopicBuilder.name("thing3")
-                .assignReplicas(0, Arrays.asList(0, 1))
-                .assignReplicas(1, Arrays.asList(1, 2))
-                .assignReplicas(2, Arrays.asList(2, 0))
+                .assignReplicas(0, List.of(0, 1))
+                .assignReplicas(1, List.of(1, 2))
+                .assignReplicas(2, List.of(2, 0))
                 .config(TopicConfig.COMPRESSION_TYPE_CONFIG, "zstd")
                 .build();
     }