自定义flume拦截器

使用IDEA自定义flume拦截器

1.创建maven工程flume-interceptor

2.创建包com.flume.interceptor

 3.在pom.xml中添加如下配置

        
            org.apache.flume
            flume-ng-core
            1.8.0
            provided
        

        
            com.alibaba
            fastjson
            1.2.62
        
    

    
        
            
                maven-compiler-plugin
                3.1
                
                    1.8
                    1.8
                
            
            
                maven-assembly-plugin
                
                    
                        jar-with-dependencies
                    
                
                
                    
                        make-assembly
                        package
                        
                            single
                        
                    
                
            
        
    

4.在com.flume.interceptor包下创建JSONUtils类

package com.flume.interceptor;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONException;

public class JSONUtils {
    //验证数据是否json
    public static boolean isValidate(String log) {

        try {
            JSON.parse(log);
            return true;
        }catch (JSONException e){
            return false;
        }

    }
}

5.在com.flume.interceptor包下创建ETLInterceptor类

package com.flume.interceptor;

import org.apache.flume.Context;
import org.apache.flume.Event;
import org.apache.flume.interceptor.Interceptor;

import java.nio.charset.Charset;
import java.util.Iterator;
import java.util.List;

public class ETLInterceptor implements Interceptor {
    @Override
    public void initialize() {

    }

    @Override
    public Event intercept(Event event) {
        //取数据后进行校验
        //获取数据
        byte[] body = event.getBody();
        String log = new String(body, Charset.forName("utf-8"));
        //校验
        if(JSONUtils.isValidate(log)){
            return event;
        }

        return null;
    }

    @Override
    public List intercept(List list) {
        Iterator iterator = list.iterator();

        while (iterator.hasNext()){
            Event next = iterator.next();
            if (intercept(next) == null) {
                iterator.remove();
            }
        }

        return list;
    }

    public static class Builder implements Interceptor.Builder {

        @Override
        public Interceptor build() {
            return new ETLInterceptor();
        }

        @Override
        public void configure(Context context) {

        }
    }

    @Override
    public void close() {

    }
}

6.打包

 7.将包放入Hadoop01的flume/lib目录下

找到包的位置，之后放入

 这样一个拦截器就完成了