apache camel_Apache Camel日志组件示例

待我称王封你为后i 2023-02-25 03:44 27阅读 0赞

apache camel

## Apache Camel日志组件示例 ##

您要将消息记录到底层的记录机制中，请使用骆驼的`log:`组件。 Camel使用`sfl4j`作为记录器API，然后允许您配置记录器实现。 在本文中，我们将使用Log4j作为实际的记录器机制。 让我们从我们的例子开始。

## 依存关系 ##

您需要添加：

1.  `slf4j-api` – SLF4J Logger API
2.  `slf4j-log4j12` – Log4j作为记录器的实现

*pom.xml：*

<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.javarticles.camel</groupId>
    	<artifactId>camelHelloWorld</artifactId>
    	<version>0.0.1-SNAPSHOT</version>
    	<dependencies>
    		<dependency>
    			<groupId>org.apache.camel</groupId>
    			<artifactId>camel-core</artifactId>
    			<version>2.15.1</version>
    		</dependency>
    		<dependency>
    			<groupId>org.apache.camel</groupId>
    			<artifactId>camel-stream</artifactId>
    			<version>2.15.1</version>
    		</dependency>
    		<dependency>
    			<groupId>org.apache.camel</groupId>
    			<artifactId>camel-jms</artifactId>
    			<version>2.15.1</version>
    		</dependency>
    		<dependency>
    			<groupId>org.apache.activemq</groupId>
    			<artifactId>activemq-camel</artifactId>
    			<version>5.6.0</version>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-context</artifactId>
    			<version>4.1.5.RELEASE</version>
    		</dependency>
    		<dependency>
    			<groupId>org.apache.camel</groupId>
    			<artifactId>camel-spring</artifactId>
    			<version>2.15.1</version>
    		</dependency>
    		<dependency>
    			<groupId>org.slf4j</groupId>
    			<artifactId>slf4j-api</artifactId>
    			<version>1.7.12</version>
    		</dependency>
    		<dependency>
    			<groupId>org.slf4j</groupId>
    			<artifactId>slf4j-log4j12</artifactId>
    			<version>1.7.12</version>
    		</dependency>
    
    	</dependencies>
    </project>

## 日志组件URI格式 ##

日志的uri格式：

log:loggingCategory[?options]

您可以使用选项来设置级别或格式设置选项。 例如：

log:com.javarticles?level=INFO

在我的log4.properties中，root logger记录到文件以及控制台，而它仅记录`com.javarticles`类别的文件。 *log4j.properties：*

# Root logger option
    log4j.rootLogger=INFO, file, console
    
    log4j.logger.com.javarticles=INFO, file
    
    # Direct log messages to a log file
    log4j.appender.file=org.apache.log4j.FileAppender
    log4j.appender.file.File=javarticles.log
    log4j.appender.file.layout=org.apache.log4j.PatternLayout
    log4j.appender.file.layout.ConversionPattern=%d | %p | %F %L | %m%n
     
    # Direct log messages to stdout
    log4j.appender.console=org.apache.log4j.ConsoleAppender
    log4j.appender.console.Target=System.out
    log4j.appender.console.layout=org.apache.log4j.PatternLayout
    log4j.appender.console.layout.ConversionPattern=%d{HH:mm}| %p | %F %L | %m%n

## 骆驼原木组件示例 ##

*CamelLog示例：*

package com.javarticles.camel.components;
    
    import org.apache.camel.CamelContext;
    import org.apache.camel.ProducerTemplate;
    import org.apache.camel.builder.RouteBuilder;
    import org.apache.camel.impl.DefaultCamelContext;
    import org.apache.camel.util.jndi.JndiContext;
    
    public class CamelLogExample {
    	public static final void main(String[] args) throws Exception {
    		JndiContext jndiContext = new JndiContext();
    		jndiContext.bind("stringUtils", new StringUtils());
    		CamelContext camelContext = new DefaultCamelContext(jndiContext);
    		try {
    			camelContext.addRoutes(new RouteBuilder() {
    				public void configure() {
    					from("direct:logExample")
    					        .log("Before converting to uppercase")
    					        .to("log:?level=INFO&showBody=true")
    							.to("bean:stringUtils?method=upperCase")
    							.log("After converting to uppercase")
    							.to("log:com.javarticles?level=INFO&showAll=true");
    				}
    			});
    			ProducerTemplate template = camelContext.createProducerTemplate();
    			camelContext.start();
    			template.sendBody("direct:logExample", "Log me!");
    		} finally {
    			camelContext.stop();
    		}
    	}
    }

*输出：*

12:09| INFO | DefaultCamelContext.java 2454 | Apache Camel 2.15.1 (CamelContext: camel-1) started in 0.307 seconds
    12:09| INFO | MarkerIgnoringBase.java 95 | Before converting to uppercase
    12:09| INFO | MarkerIgnoringBase.java 95 | Exchange[ExchangePattern: InOnly, BodyType: String, Body: Log me!]
    12:09| INFO | MarkerIgnoringBase.java 95 | After converting to uppercase
    12:09| INFO | MarkerIgnoringBase.java 95 | Exchange[Id: ID-INMAA1-L1005-54363-1431153589693-0-2, ExchangePattern: InOnly, Properties: {CamelCreatedTimestamp=Sat May 09 12:09:50 IST 2015, CamelMessageHistory=[DefaultMessageHistory[routeId=route1, node=log1], DefaultMessageHistory[routeId=route1, node=to1], DefaultMessageHistory[routeId=route1, node=to2], DefaultMessageHistory[routeId=route1, node=log2], DefaultMessageHistory[routeId=route1, node=to3]], CamelToEndpoint=log://com.javarticles?level=INFO&showAll=true}, Headers: {breadcrumbId=ID-INMAA1-L1005-54363-1431153589693-0-1}, BodyType: String, Body: LOG ME!, Out: null: ]
    12:09| INFO | DefaultCamelContext.java 2660 | Apache Camel 2.15.1 (CamelContext: camel-1) is shutting down

## 自定义Exchange格式化程序 ##

如果您在上述日志中注意到，即使对于`showBody=true`情况，它也会打印有效负载以及与交换相关的属性，例如`ExchangePattern`和`BodyType` 。 我们可以自定义想要在日志中看到的内容。 让我们看看如何实现它。 通过实现`ExchangeFormatter`接口来实现自定义格式器类。 从`Exchange`对象中选择我们要记录的元素。 在我们的自定义交换格式化程序中，我们只想查看有效负载文本，因此`format(Exchange)`返回的是入站请求消息。 *MyExchangeFormatter：*

package com.javarticles.camel.components;
    
    import org.apache.camel.Exchange;
    import org.apache.camel.spi.ExchangeFormatter;
    
    public class MyExchangeFormatter implements ExchangeFormatter {
    
        public String format(Exchange exchange) {
            return exchange.getIn().getBody(String.class);
        }
    
    }

您需要将foamtter对象与键`logFormatter` 。

jndiContext.bind("logFormatter", new MyExchangeFormatter());

*CamelLogExchangeFormatter示例：*

package com.javarticles.camel.components;
    
    import org.apache.camel.CamelContext;
    import org.apache.camel.ProducerTemplate;
    import org.apache.camel.builder.RouteBuilder;
    import org.apache.camel.impl.DefaultCamelContext;
    import org.apache.camel.util.jndi.JndiContext;
    
    public class CamelLogExchangeFormatterExample {
    	public static final void main(String[] args) throws Exception {
    		JndiContext jndiContext = new JndiContext();
    		jndiContext.bind("stringUtils", new StringUtils());
    		jndiContext.bind("logFormatter", new MyExchangeFormatter());
    		CamelContext camelContext = new DefaultCamelContext(jndiContext);
    		try {
    			camelContext.addRoutes(new RouteBuilder() {
    				public void configure() {
    					from("direct:logExample")
    					        .log("Before converting to uppercase")
    					        .to("log:?level=INFO")
    							.to("bean:stringUtils?method=upperCase")
    							.log("After converting to uppercase")
    							.to("log:com.javarticles?level=INFO");
    				}
    			});
    			ProducerTemplate template = camelContext.createProducerTemplate();
    			camelContext.start();
    			template.sendBody("direct:logExample", "Log me!");
    		} finally {
    			camelContext.stop();
    		}
    	}
    }

*StringUtils：*

package com.javarticles.camel.components;
    
    
    public class StringUtils {
    	public String upperCase(String msg) {
    		return msg.toUpperCase();
    	}
    }

*输出：*

## 吞吐量记录器示例 ##

消息（本例中为数字）被发送到activemq队列`numbers` ，路由中的下一个目标将每10秒记录一次消息统计信息。 使用`groupInterval=10000`选项配置间隔。

*applicationContext.xml：*

<?xml version="1.0" encoding="UTF-8"?>
    
    <beans xmlns="http://www.springframework.org/schema/beans"
    	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    	xsi:schemaLocation="
            http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
            http://camel.apache.org/schema/spring http://camel.apache.org/schema/spring/camel-spring.xsd
           ">
    	<bean id="connectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
    		<property name="brokerURL" value="vm://localhost?broker.persistent=false" />
    	</bean>
    	<bean id="activemq" class="org.apache.activemq.camel.component.ActiveMQComponent">
    		<property name="connectionFactory" ref="connectionFactory" />
    	</bean>
    	<camelContext xmlns="http://camel.apache.org/schema/spring">
    		<route>
    			<from uri="activemq:queue:numbers" />
    			<to uri="log:com.javarticles?level=INFO&groupInterval=10000" />
    		</route>
    	</camelContext>	
    </beans>

*CamelThroughputLogger示例：*

package com.javarticles.camel.components;
    
    import org.apache.camel.CamelContext;
    import org.apache.camel.ProducerTemplate;
    import org.apache.camel.spring.SpringCamelContext;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    public class CamelThroughputLoggerExample {
    	public static final void main(String[] args) throws Exception {
    		ApplicationContext appContext = new ClassPathXmlApplicationContext(
    				"applicationContext.xml");
    		CamelContext camelContext = SpringCamelContext.springCamelContext(
    				appContext, false);
    		try {
    			ProducerTemplate template = camelContext.createProducerTemplate();
    			camelContext.start();			
    			for (int i = 0; i <18000; i++) {
    			    template.sendBody("activemq:queue:numbers", i);
    			}
    			Thread.sleep(10000);
    		} finally {
    			camelContext.stop();
    		}
    	}
    }

*输出：*

19:04| INFO | MarkerIgnoringBase.java 95 | Received: 281 new messages, with total 281 so far. Last group took: 470 millis which is: 597.872 messages per second. average: 597.872
    19:04| INFO | MarkerIgnoringBase.java 95 | Received: 14802 new messages, with total 15083 so far. Last group took: 10001 millis which is: 1,480.052 messages per second. average: 1,440.455
    19:05| INFO | MarkerIgnoringBase.java 95 | Received: 2917 new messages, with total 18000 so far. Last group took: 10000 millis which is: 291.7 messages per second. average: 879.293

## 下载源代码 ##

这是有关骆驼原木组件的示例。 您可以在此处下载源代码： [**camelLogComponentExamples.zip**][camelLogComponentExamples.zip]

> 翻译自: [https://www.javacodegeeks.com/2015/05/apache-camel-log-component-examples.html][https_www.javacodegeeks.com_2015_05_apache-camel-log-component-examples.html]

apache camel

[camelLogComponentExamples.zip]: http://javarticles.com/wp-content/uploads/2015/05/camelLogComponentExamples.zip
[https_www.javacodegeeks.com_2015_05_apache-camel-log-component-examples.html]: https://www.javacodegeeks.com/2015/05/apache-camel-log-component-examples.html