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[英]Configure datasource for integrating Spring Security in existing Spring project
[英]integrating kafka in an existing spring project
我在spring-kafka上使用spring-boot找到了很多教程,並成功實現了它們。 為什么所有教程都使用spring-boot? spring-kafka中是否存在某種依賴關系,還是最好的解決方案?
我已經有一個spring項目,正在嘗試在其中添加spring-kafka maven模塊。 我的主項目的pom.xml如下所示。
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com</groupId>
<artifactId>Catalog</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>pom</packaging>
<name>Catalog</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
<modules>
<module>service</module>
<module>db</module>
<module>web</module>
<module>Test2</module>
<module>entity</module>
<module>history</module>
</modules>
</project>
我模塊的pom.xml如下所示
<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd"
xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com</groupId>
<artifactId>Catalog</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<groupId>com</groupId>
<artifactId>history</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>history</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.json/json -->
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20170516</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<!--
https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<version>1.5.3.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.kafka/spring-kafka -->
<dependency>
<groupId>org.springframework.kafka</groupId>
<artifactId>spring-kafka</artifactId>
<version>1.2.2.RELEASE</version>
</dependency>
</dependencies>
</project>
有了這些依賴項,項目將無法運行。 我必須更換
<parent>
<groupId>com</groupId>
<artifactId>Catalog</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
使用本教程中的以下代碼以使其正常工作。
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.3.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
如何不使用spring-boot來運行spring-kafka?
App.java
package org.history;
public class App {
public static void main( String[] args ) {
KafkaTest test = new KafkaTest();
test.start();
}
}
KafkaTest.java
package org.history;
import java.util.HashMap;
import java.util.Map;
import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.common.serialization.IntegerDeserializer;
import org.apache.kafka.common.serialization.IntegerSerializer;
import org.apache.kafka.common.serialization.StringDeserializer;
import org.apache.kafka.common.serialization.StringSerializer;
import org.springframework.kafka.core.DefaultKafkaConsumerFactory;
import org.springframework.kafka.core.DefaultKafkaProducerFactory;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.kafka.core.ProducerFactory;
import
org.springframework.kafka.listener.KafkaMessageListenerContainer;
import org.springframework.kafka.listener.MessageListener;
import org.springframework.kafka.listener.config.ContainerProperties;
public class KafkaTest {
public void start() {
System.out.println("starting");
ContainerProperties containerProps = new ContainerProperties("cscart_product_topic");
containerProps.setMessageListener(new MessageListener<Integer, String>() {
@Override
public void onMessage(ConsumerRecord<Integer, String> message) {
System.out.println("received: " + message);
}
});
KafkaMessageListenerContainer<Integer, String> container = createContainer(containerProps);
container.setBeanName("testAuto");
container.start();
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// wait a bit for the container to start
KafkaTemplate<Integer, String> template = createTemplate();
template.setDefaultTopic("cscart_product_topic");
template.sendDefault(0, "foo");
template.sendDefault(2, "bar");
template.sendDefault(0, "baz");
template.sendDefault(2, "qux");
template.flush();
container.stop();
}
private KafkaMessageListenerContainer<Integer, String> createContainer(
ContainerProperties containerProps) {
Map<String, Object> props = consumerProps();
DefaultKafkaConsumerFactory<Integer, String> cf =
new DefaultKafkaConsumerFactory<Integer, String>(props);
KafkaMessageListenerContainer<Integer, String> container =
new KafkaMessageListenerContainer<>(cf, containerProps);
return container;
}
private KafkaTemplate<Integer, String> createTemplate() {
Map<String, Object> senderProps = senderProps();
ProducerFactory<Integer, String> pf =
new DefaultKafkaProducerFactory<Integer, String>(senderProps);
KafkaTemplate<Integer, String> template = new KafkaTemplate<>(pf);
return template;
}
private Map<String, Object> consumerProps() {
Map<String, Object> props = new HashMap<>();
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092");
props.put(ConsumerConfig.GROUP_ID_CONFIG, "cscart_product");
props.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, true);
props.put(ConsumerConfig.AUTO_COMMIT_INTERVAL_MS_CONFIG, "100");
props.put(ConsumerConfig.SESSION_TIMEOUT_MS_CONFIG, "15000");
props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, IntegerDeserializer.class);
props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
return props;
}
private Map<String, Object> senderProps() {
Map<String, Object> props = new HashMap<>();
props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092");
props.put(ProducerConfig.RETRIES_CONFIG, 0);
props.put(ProducerConfig.BATCH_SIZE_CONFIG, 16384);
props.put(ProducerConfig.LINGER_MS_CONFIG, 1);
props.put(ProducerConfig.BUFFER_MEMORY_CONFIG, 33554432);
props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, IntegerSerializer.class);
props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
return props;
}
}
如官方文檔中所述添加此內容。
<dependency>
<groupId>org.springframework.kafka</groupId>
<artifactId>spring-kafka</artifactId>
<version>1.2.1.RELEASE</version>
</dependency>
然后我在第一行的KafkaTest.java中得到一個錯誤
package org.history;
錯誤顯示“無法解析org.springframework.messaging.Message類型。它是從所需的.class文件中間接引用的”
將其添加到pom.xml中足以在不使用Spring Boot的情況下使用spring-kafka。
<dependency>
<groupId>org.springframework.kafka</groupId>
<artifactId>spring-kafka</artifactId>
<version>1.2.1.RELEASE</version>
</dependency>
看看官方網站
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