1.通過文件方式執行轉換。
public static void runTransfer(String[] params, String ktrPath) {
Trans trans = null;
try {
// // 初始化
// 轉換元對象
KettleEnvironment.init();// 初始化
EnvUtil.environmentInit();
TransMeta transMeta = new TransMeta(ktrPath);
// 轉換
trans = new Trans(transMeta);
// 執行轉換
trans.execute(params);
// 等待轉換執行結束
trans.waitUntilFinished();
// 拋出異常
if (trans.getErrors() > 0) {
throw new Exception(
"There are errors during transformation exception!(傳輸過程中發生異常)");
}
} catch (Exception e) {
e.printStackTrace();
}
}
2.通過文件方式執行job
public static void runJob(Map<String,String> maps, String jobPath) {
try {
KettleEnvironment.init();
// jobname 是Job腳本的路徑及名稱
JobMeta jobMeta = new JobMeta(jobPath, null);
Job job = new Job(null, jobMeta);
// 向Job 腳本傳遞參數,腳本中獲取參數值:${參數名}
// job.setVariable(paraname, paravalue);
Set<Entry<String, String>> set=maps.entrySet();
for(Iterator<Entry<String, String>> it=set.iterator();it.hasNext();){
Entry<String, String> ent=it.next();
job.setVariable(ent.getKey(), ent.getValue());
}
job.start();
job.waitUntilFinished();
if (job.getErrors() > 0) {
throw new Exception(
"There are errors during job exception!(執行job發生異常)");
}
} catch (Exception e) {
e.printStackTrace();
}
}
3.執行資源庫的中的轉換。
public static void runWithDb() throws KettleException{
KettleEnvironment.init();
//創建DB資源庫
KettleDatabaseRepository repository=new KettleDatabaseRepository();
DatabaseMeta databaseMeta=new DatabaseMeta("kettle","mysql","jdbc","localhost","kettle","3306","root","root");
//選擇資源庫
KettleDatabaseRepositoryMeta kettleDatabaseRepositoryMeta=new KettleDatabaseRepositoryMeta("kettle","kettle","Transformation description",databaseMeta);
repository.init(kettleDatabaseRepositoryMeta);
//連接資源庫
repository.connect("admin","admin");
RepositoryDirectoryInterface directoryInterface=repository.loadRepositoryDirectoryTree();
//選擇轉換
TransMeta transMeta=repository.loadTransformation("demo1",directoryInterface,null,true,null);
Trans trans=new Trans(transMeta);
trans.execute(null);
trans.waitUntilFinished();//等待直到數據結束
if(trans.getErrors()>0){
System.out.println("transformation error");
}else{
System.out.println("transformation successfully");
}
}