flume客户端模拟数据发送并记录在mysql数据库

这里只是做了简单的demo，并未深研

1.编写PolluteSink

　　1.1 maven创建项目(pom.xml)

<dependencies>
    <dependency>
        <groupId>org.apache.flume</groupId>
        <artifactId>flume-ng-core</artifactId>
        <version>1.6.0</version>
    </dependency>
    <dependency>
        <groupId>org.apache.flume</groupId>
        <artifactId>flume-ng-configuration</artifactId>
        <version>1.6.0</version>
    </dependency>
    <dependency>
        <groupId>org.apache.flume</groupId>
        <artifactId>flume-ng-sdk</artifactId>
        <version>1.6.0</version>
    </dependency>
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.17</version>
    </dependency>
    <dependency>
        <groupId>org.apache.flume</groupId>
        <artifactId>flume-ng-core</artifactId>
        <version>1.6.0</version>
    </dependency>
    <dependency>
        <groupId>org.apache.camel</groupId>
        <artifactId>camel-support</artifactId>
        <version>3.0.0-M2</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>6.0.6</version>
    </dependency>

</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.1</version>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
        </plugin>
    </plugins>
</build>

　　1.2 自定义sink

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

package com.example.demo1.pollute;

import com.example.demo1.entity.Pollute;
import com.example.demo1.utils.FormatDataUtil;
import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;
import org.apache.flume.*;
import org.apache.flume.conf.Configurable;
import org.apache.flume.sink.AbstractSink;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.nio.charset.Charset;
import java.sql.*;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * 污染源在线自动监控（监测）系统数据传输标准（国标）
 *
 * @author chenxiaokang
 * @date 2019/10/14 13:53
 */
public class PolluteSink extends AbstractSink implements Configurable {

    private Logger LOG = LoggerFactory.getLogger(PolluteSink.class);

    private String tableName;
    private String user;
    private String password;
    private String hostname;
    private String port;
    private Connection conn;
    private String databaseName;
    private PreparedStatement preparedStatement;

    @Override
    public void configure(Context context) {
        databaseName = context.getString("databaseName");
        Preconditions.checkNotNull(databaseName, "databaseName must be set!!");
        tableName = context.getString("tableName");
        Preconditions.checkNotNull(tableName, "tableName must be set!!");
        user = context.getString("user");
        Preconditions.checkNotNull(user, "user must be set!!");
        password = context.getString("password");
        Preconditions.checkNotNull(password, "password must be set!!");
        hostname = context.getString("hostname");
        Preconditions.checkNotNull(hostname, "host must be set!!");
        port = context.getString("port");
        Preconditions.checkNotNull(port, "port must be set!!");
    }

    @Override
    public Status process() throws EventDeliveryException {
        Status result = Status.READY;
        Channel channel = getChannel();
        List<String> actions = Lists.newArrayList();
        Transaction transaction = null;
        try {
            transaction = channel.getTransaction();
            Event event;
            String content;
            transaction.begin();
            event = channel.take();
            LOG.info("event:{}",event);
            if (event != null) {
                System.out.println("content++++:"+event.getBody());
                content = new String(event.getBody(), Charset.forName("UTF-8"));
                System.out.println("content"+content);
                actions.add(content);
            } else {
                result = Status.BACKOFF;
            }
            Map<String, String> map = null;
            System.out.println("actions.size() :"+actions.size() );
            if (actions.size() > 0) {
                for (String temp : actions) {
                    LOG.info("--- content : " + temp);
                    System.out.println(temp);
                    map = FormatDataUtil.getMapByData(temp);
                    List<Pollute> pollutes = new ArrayList<>();
                    for (Map.Entry<String, String> entry : map.entrySet()) {
                        Pollute pollute = new Pollute();
                        pollute.setKey(entry.getKey());
                        pollute.setValue(entry.getValue());
                        pollutes.add(pollute);
                    }
                    if (pollutes.size() > 0) {
                        preparedStatement.clearBatch();
                        for (Pollute pollute : pollutes) {
                            preparedStatement.setString(1, pollute.getKey());
                            preparedStatement.setString(2, pollute.getValue());
                            preparedStatement.setTimestamp(3,new Timestamp(System.currentTimeMillis()));
                            preparedStatement.addBatch();
                        }
                        preparedStatement.executeBatch();
                        conn.commit();
                    }
                }
            }
            transaction.commit();
        } catch (Exception e) {
            e.printStackTrace();
            LOG.error("", e);
        } finally {
            if (transaction != null) {
                transaction.close();
            }

        }
        return result;
    }

    @Override
    public void start() {
        super.start();
        try {
            //调用Class.forName()方法加载驱动程序
            Class.forName("com.mysql.jdbc.Driver");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }

        String url = "jdbc:mysql://"+hostname+":3306/"+databaseName+"?allowMultiQueries=true&useUnicode=true&" +
                "characterEncoding=UTF8&zeroDateTimeBehavior=convertToNull";
        //调用DriverManager对象的getConnection()方法，获得一个Connection对象

        try {
            LOG.info("user:{},password:{}",user,password);
            conn = DriverManager.getConnection(url, user, password);
            conn.setAutoCommit(false);
            //创建一个Statement对象
            preparedStatement = conn.prepareStatement("insert into bs_pollute(`key`,`value`,date_add) values (?,?,?)");

        } catch (SQLException e) {
            e.printStackTrace();
        }

    }

    @Override
    public void stop() {
        super.stop();
        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if (preparedStatement != null) {
            try {
                preparedStatement.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

    }

}

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

package com.example.demo1.utils;

import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
 * @author chenxiaokang
 * @date 2019/10/14 11:25
 */
public class FormatDataUtil {

    private static String arg = "";
    private static String arg1 = ";";
    private static String arg2 = ",";
    private static String arg3 = "=";
    private static String arg4 = "&&";
    private static String arg6 = "##";
    private static String arg7 = "DataTime";

    public static void main(String[] args) throws IOException {
        String data = "QN=20040516010101001;ST=32;CN=1072;PW=123456;MN=88888880000001;Flag=3;CP=&&PW=654321&&";
        FileUtils.writeFile("polluteTxt",getMapByData(data));
    }

    /**
     * 将接收到的数据转为map
     * @param data
     * @return
     */
    public static Map<String, String> getMapByData(String data) {
        System.out.println("data:"+data);
        if (isEmpty(data)) {
            return null;
        }
        Map<String, String> map = new HashMap<String, String>();
        data = data.replaceAll(arg6, "");
        if(isContainsChars(data,arg1)){
            String[] temp = getArrayByChar(data, arg1);
            for (String s : temp) {
                // 如果有多个参数用逗号分割
                if (isContainsChars(s, arg2)) {
                    String[] temp1 = getArrayByChar(s, arg2);
                    for (String s1 : temp1) {
                        intoMap(map, s1);
                    }
                } else {
                    intoMap(map,s);
                }
            }
        }
        return map;
    }

    /**
     * 因为字段中存在特殊的（CP=&&DataTime=20040516020111）格式，不光是以（key=value）格式
     * 所以需要对其进行处理
     * @param map
     * @param var
     */
    public static void intoMap(Map<String, String> map, String var) {
        // 数据中是否存在CP=&&DataTime=20040516020111;格式  如果有按&&分割
        if (isContainsChars(var, arg4)) {
            String[] temp2 = getArrayByChar(var, arg4);
            String[] temp3;
            if(temp2.length == 1){
                temp3 = getArrayByChar(temp2[0], arg3);
            }else{
                temp3 = getArrayByChar(temp2[1], arg3);
            }
            if (temp3.length == 2) {
                if(arg7.equals(temp3[0])){
                    map.put(temp3[0],formatDateStr(temp3[1]));
                }else{
                    map.put(temp3[0], temp3[1]);
                }
            }
        } else {
            // 数据直接是key=value格式
            String[] temp4 = getArrayByChar(var, arg3);
            if (temp4.length == 2) {
                if(arg7.equals(temp4[0])){
                    map.put(temp4[0],formatDateStr(temp4[1]));
                }else{
                    map.put(temp4[0], temp4[1]);
                }
            }
        }
    }

    /**
     * 根据指定字符分割字符串
     *
     * @param datastr
     * @param s
     * @return
     */
    public static String[] getArrayByChar(String datastr, String s) {
        if (isEmpty(datastr) || !isContainsChars(datastr, s)) {
            return null;
        }
        return datastr.trim().replaceAll("\\s*", arg).split(s);
    }

    /**
     * 判断字符串是否包含指定字符串
     *
     * @param str
     * @return
     */
    public static boolean isContainsChars(String str, String arg) {
        if (isEmpty(str) || isEmpty(arg)) {
            return false;
        }
        return str.contains(arg);
    }
    /**
     * 判断字符串是否为空
     *
     * @param str
     * @return
     */
    public static boolean isEmpty(String str) {
        return str == null || arg.equals(str);
    }

    /**
     * 格式化时间字符串
     * @param datestr
     * @return
     */
    public static String formatDateStr(String datestr){
        if(isEmpty(datestr)){
          return arg;
        }
        SimpleDateFormat format = new SimpleDateFormat("yyyyMMddHHmmss");
        try {
            Date date = format.parse(datestr);
            return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(date);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return datestr;
    }

}

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

包结构如下

　　1.3 创建entity

package com.example.demo1.entity;

import java.util.Date;

/**
 * 数据
 * @author chenxiaokang
 * @date 2019/10/15 10:26
 */
public class Pollute {
    private String key;
    private String value;
    private Date dateAdd;

    public Date getDateAdd() {
        return dateAdd;
    }

    public void setDateAdd(Date dateAdd) {
        this.dateAdd = dateAdd;
    }

    public String getValue() {
        return value;
    }

    public void setValue(String value) {
        this.value = value;
    }

    public String getKey() {
        return key;
    }

    public void setKey(String key) {
        this.key = key;
    }
}

　　1.4 将项目打包成jar,并拷贝到flume中lib(需要将mysql的jar也要考进去)

2.flume中conf配置(模拟数据需要将agent.sources.ri.type 改为 avro)并启动flume 命令/opt/flume/bin/flume-ng agent --conf-file /opt/flume/conf/flume-conf.properties -n agent -c /opt/flume/conf/  -Dflume.root.logger=DEBUG,console

3.编写模拟发送数据类并启动

package com.example.demo1.utils;

import org.apache.flume.Event;
import org.apache.flume.EventDeliveryException;
import org.apache.flume.api.RpcClient;
import org.apache.flume.api.RpcClientFactory;
import org.apache.flume.event.EventBuilder;
import java.nio.charset.Charset;

/**
 * @author chenxiaokang
 * @date 2019/10/14 18:32
 */
public class CouScoketUtil {

    public static void main(String[] args) throws Exception {
        MyRpcClientFacade client = new MyRpcClientFacade();
        // Initialize client with the remote Flume agent's host and port
        client.init("服务器IP地址", 7001);

        // Send 10 events to the remote Flume agent. That agent should be
        // configured to listen with an AvroSource.
        // String sampleData = "ERROR";
        String sampleData = "ST=91;CN=9011;PW=123456;MN=88888880000001;Flag=0;CP=&&QN=20040516010101001;QnRtn=1&&";
        System.out.println("发送数据");
        client.sendDataToFlume(sampleData);
        client.cleanUp();
    }
}

class MyRpcClientFacade {
    private RpcClient client;
    private String hostname;
    private int port;

    public void init(String hostname, int port) {
        // Setup the RPC connection
        this.hostname = hostname;
        this.port = port;
        this.client = RpcClientFactory.getDefaultInstance(hostname, port);
        System.out.println("建立连接");
        // Use the following method to create a thrift client (instead of the
        // above line):
        // this.client = RpcClientFactory.getThriftInstance(hostname, port);
    }

    public void sendDataToFlume(String data) {
        // Create a Flume Event object that encapsulates the sample data
        Event event = EventBuilder.withBody(data, Charset.forName("UTF-8"));
        try {
            client.append(event);
        } catch (EventDeliveryException e) {
            // clean up and recreate the client
            client.close();
            client = null;
            client = RpcClientFactory.getDefaultInstance(hostname, port);
            // Use the following method to create a thrift client (instead of
            // the above line):
            // this.client = RpcClientFactory.getThriftInstance(hostname, port);
        }
    }

    public void cleanUp() {
        // Close the RPC connection
        System.out.println("断开连接");
        client.close();
    }
}

4.数据保存成功