kettle学习专题

1、通过kettle连接neo4j

 kettle和neo4j连接

参考网站：https://www.bsimard.com/2018/09/03/kettle-neo4j.html

kettle连接mysql参数设置

 参考：https://blog.csdn.net/weixin_39588754/article/details/87982399

 springboot整合kettle

1、添加依赖jar

 2、添加坐标

 <dependency>
            <groupId>kettle</groupId>
            <artifactId>kettle-core</artifactId>
            <scope>system</scope>
            <version>8.2.0.0-342</version>
            <systemPath>${project.basedir}/src/main/resources/libs/kettle-core-8.2.0.0-342.jar</systemPath>
        </dependency>
        <dependency>
            <groupId>kettle</groupId>
            <artifactId>kettle-engine</artifactId>
            <scope>system</scope>
            <version>8.2.0.0-342</version>
            <systemPath>${project.basedir}/src/main/resources/libs/kettle-engine-8.2.0.0-342.jar</systemPath>
        </dependency>

        <dependency>
            <groupId>commons</groupId>
            <artifactId>commons-vfs2</artifactId>
            <scope>system</scope>
            <version>2.2</version>
            <systemPath>${project.basedir}/src/main/resources/libs/commons-vfs2-2.2.jar</systemPath>
        </dependency>

        <dependency>
            <groupId>pentaho</groupId>
            <artifactId>pentaho-capability-manager</artifactId>
            <scope>system</scope>
            <version>8.2.0.0-342</version>
            <systemPath>${project.basedir}/src/main/resources/libs/pentaho-capability-manager-8.2.0.0-342.jar</systemPath>
        </dependency>

        <dependency>
            <groupId>pentaho</groupId>
            <artifactId>pentaho-capability-manager</artifactId>
            <scope>system</scope>
            <version>pentaho-vfs-browser</version>
            <systemPath>${project.basedir}/src/main/resources/libs/pentaho-vfs-browser-8.2.0.0-342.jar</systemPath>
        </dependency>

        <dependency>
            <groupId>metastore</groupId>
            <artifactId>metastore</artifactId>
            <scope>system</scope>
            <version>8.2.0.0-342</version>
            <systemPath>${project.basedir}/src/main/resources/libs/metastore-8.2.0.0-342.jar</systemPath>
        </dependency>

        <dependency>
            <groupId>pentaho</groupId>
            <artifactId>pentaho-registry</artifactId>
            <scope>system</scope>
            <version>8.2.0.0-342</version>
            <systemPath>${project.basedir}/src/main/resources/libs/pentaho-registry-8.2.0.0-342.jar</systemPath>
        </dependency>

        		<dependency>
        			<groupId>mysql</groupId>
        			<artifactId>mysql-connector-java</artifactId>
        			<scope>system</scope>
        			<version>5.1.48</version>
        			<systemPath>${project.basedir}/src/main/resources/libs/mysql-connector-java-5.1.48.jar</systemPath>
        		</dependency>

        <dependency>
            <groupId>pentaho-connections</groupId>
            <artifactId>pentaho-connections</artifactId>
            <scope>system</scope>
            <version>8.2.0.0-342</version>
            <systemPath>${project.basedir}/src/main/resources/libs/pentaho-connections-8.2.0.0-342.jar</systemPath>
        </dependency>


        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.2</version>
        </dependency>
        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>2.6</version>
        </dependency>

　　注意：必须添加kettle文件夹中的lib下面的mysql的jar

3、代码

package com.hgchain.neo4j.data.service;

import com.hgchain.neo4j.data.configure.KettleMysqlRepProperties;
import com.hgchain.neo4j.data.exception.BusinessException;
import lombok.extern.slf4j.Slf4j;
import org.pentaho.di.core.KettleEnvironment;
import org.pentaho.di.core.database.DatabaseMeta;
import org.pentaho.di.core.exception.KettleException;
import org.pentaho.di.core.logging.LogLevel;
import org.pentaho.di.job.Job;
import org.pentaho.di.job.JobMeta;
import org.pentaho.di.repository.RepositoryDirectoryInterface;
import org.pentaho.di.repository.kdr.KettleDatabaseRepository;
import org.pentaho.di.repository.kdr.KettleDatabaseRepositoryMeta;
import org.pentaho.di.trans.Trans;
import org.pentaho.di.trans.TransMeta;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

/**
 * @author liubh
 * @date 2020/12/15 9:18
 **/
@Service
@Slf4j
public class DispatchJobService {
    private static final String KETTLE_MYSQL_USERNAME = "admin";
    private static final String KETTLE_MYSQL_PASSWORD = "admin";
    KettleDatabaseRepository rep = new KettleDatabaseRepository();

    @Autowired
    private KettleMysqlRepProperties kettleMysqlRepProperties;

    /**
     * 连接数据库资源库
     *
     * @return
     * @throws KettleException
     */
    public Boolean repositoryCon() {
        try {
            KettleEnvironment.init();
            //EnvUtil.environmentInit();
            DatabaseMeta dataMeta = new DatabaseMeta(kettleMysqlRepProperties.getName(), kettleMysqlRepProperties.getType(),
                    kettleMysqlRepProperties.getAccess(), kettleMysqlRepProperties.getHost(), kettleMysqlRepProperties.getDb(), kettleMysqlRepProperties.getPort(), kettleMysqlRepProperties.getUser(), kettleMysqlRepProperties.getPass());
            //选择资源库
            KettleDatabaseRepositoryMeta repInfo = new KettleDatabaseRepositoryMeta();
            repInfo.setConnection(dataMeta);
            //数据库形式的资源库元对象
            rep.init(repInfo);
            rep.connect(KETTLE_MYSQL_USERNAME, KETTLE_MYSQL_PASSWORD);
        } catch (KettleException e) {
            throw new BusinessException("连接数据库资源库失败");
        }
        if (rep.isConnected()) {
            log.info("连接成功");
            return true;
        } else {
            log.info("连接失败");
            return false;
        }
    }

    /**
     * 调度任务
     * @param jobName
     */
//    @Scheduled(cron = "0/5 * * * * *")
    public void runJob(String jobName) {
        //数据库资源库连接
        Boolean aBoolean = this.repositoryCon();
        if (!aBoolean) {
            throw new BusinessException("连接数据库资源库失败");
        }
        try {
            //根据指定的字符串路径 找到目录
            RepositoryDirectoryInterface dir = rep.findDirectory("/");
            //加载指定的job
            JobMeta jobMeta = rep.loadJob(rep.getJobId(jobName, dir), null);
            Job job = new Job(rep, jobMeta);
            //设置参数
            //jobMeta.setParameterValue("method", "update");
            job.setLogLevel(LogLevel.ERROR);
            //启动执行指定的job
            job.run();
            job.waitUntilFinished();//等待job执行完；
            job.setFinished(true);
            log.info(job.getResult().getLogText());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * @param transName 要调用的trans名称
     *                  调用资源库中的trans
     */
//    @Scheduled(cron = "0/5 * * * * *")
    public void runTrans(String transName) {
        //数据库资源库连接
        Boolean aBoolean = this.repositoryCon();
        if (!aBoolean) {
            throw new BusinessException("连接数据库资源库失败");
        }
        try {
            //根据指定的字符串路径 找到目录
            RepositoryDirectoryInterface dir = rep.findDirectory("/");
            TransMeta transMeta = rep.loadTransformation(rep.getTransformationID(transName, dir), null);
            //设置参数
            //tmeta.setParameterValue("", "");
            Trans trans = new Trans(transMeta);
            //执行trans
            trans.execute(null);
            trans.waitUntilFinished();
            if (trans.getErrors() > 0) {
                log.info("kettle转换失败");
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

　　扩展知识-读取application.yml的属性值

package com.hgchain.neo4j.data.configure;

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

/**
 * @author bai
 */
@Component
@ConfigurationProperties(prefix = "kettle-repository")
@Data
public class KettleMysqlRepProperties {

    private String name;
    private String access;
    private String type;
    private String host;
    private String db;
    private String user;
    private String pass;
    private String port;


}

　　

 参考网站：https://blog.csdn.net/hubeilihao/article/details/28647721