JAVA SDK 的使用
Linkis 提供了方便的JAVA和SCALA调用的接口，只需要引入linkis-computation-client的模块就可以进行使用，1.0后新增支持带Label提交的方式，下面将对兼容0.X的方式和1.0新增的方式进行介绍
1. 引入依赖模块
<dependency>
<groupId>org.apache.linkis</groupId>
<artifactId>linkis-computation-client</artifactId>
<version>${linkis.version}</version>
</dependency>
如：
<dependency>
<groupId>org.apache.linkis</groupId>
<artifactId>linkis-computation-client</artifactId>
<version>1.0.3</version>
</dependency>
2. Java测试代码
建立Java的测试类LinkisClientTest，具体接口含义可以见注释：
package org.apache.linkis.client.test;
import org.apache.linkis.common.utils.Utils;
import org.apache.linkis.httpclient.dws.authentication.StaticAuthenticationStrategy;
import org.apache.linkis.httpclient.dws.config.DWSClientConfig;
import org.apache.linkis.httpclient.dws.config.DWSClientConfigBuilder;
import org.apache.linkis.manager.label.constant.LabelKeyConstant;
import org.apache.linkis.protocol.constants.TaskConstant;
import org.apache.linkis.ujes.client.UJESClient;
import org.apache.linkis.ujes.client.UJESClientImpl;
import org.apache.linkis.ujes.client.request.JobSubmitAction;
import org.apache.linkis.ujes.client.request.JobExecuteAction;
import org.apache.linkis.ujes.client.request.ResultSetAction;
import org.apache.linkis.ujes.client.response.*;
import org.apache.commons.io.IOUtils;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
public class LinkisClientTest {
// 1. build config: linkis gateway url
private static DWSClientConfig clientConfig = ((DWSClientConfigBuilder) (DWSClientConfigBuilder.newBuilder()
.addServerUrl("http://127.0.0.1:9001/") //set linkis-mg-gateway url: http://{ip}:{port}
.connectionTimeout(30000) //connectionTimeOut
.discoveryEnabled(false) //disable discovery
.discoveryFrequency(1, TimeUnit.MINUTES) // discovery frequency
.loadbalancerEnabled(true) // enable loadbalance
.maxConnectionSize(5) // set max Connection
.retryEnabled(false) // set retry
.readTimeout(30000) //set read timeout
.setAuthenticationStrategy(new StaticAuthenticationStrategy()) //AuthenticationStrategy Linkis authen suppory static and Token
.setAuthTokenKey("hadoop") // set submit user
.setAuthTokenValue("123456"))) // set passwd or token (setAuthTokenValue("test"))
.setDWSVersion("v1") //linkis rest version v1
.build();
// 2. new Client(Linkis Client) by clientConfig
private static UJESClient client = new UJESClientImpl(clientConfig);
public static void main(String[] args) {
String user = "hadoop"; // 用户需要和AuthTokenKey的值保持一致
String executeCode = "df=spark.sql(\"show tables\")\n" +
"show(df)"; // code support:sql/hql/py/scala
try {
System.out.println("user : " + user + ", code : [" + executeCode + "]");
// 3. build job and execute
JobExecuteResult jobExecuteResult = toSubmit(user, executeCode);
System.out.println("execId: " + jobExecuteResult.getExecID() + ", taskId: " + jobExecuteResult.taskID());
// 4. get job jonfo
JobInfoResult jobInfoResult = client.getJobInfo(jobExecuteResult);
int sleepTimeMills = 1000;
int logFromLen = 0;
int logSize = 100;
while (!jobInfoResult.isCompleted()) {
// 5. get progress and log
JobProgressResult progress = client.progress(jobExecuteResult);
System.out.println("progress: " + progress.getProgress());
JobLogResult logRes = client.log(jobExecuteResult, logFromLen, logSize);
logFromLen = logRes.fromLine();
// 0: info 1: warn 2: error 3: all
System.out.println(logRes.log().get(3));
Utils.sleepQuietly(sleepTimeMills);
jobInfoResult = client.getJobInfo(jobExecuteResult);
}
JobInfoResult jobInfo = client.getJobInfo(jobExecuteResult);
// 6. Get the result set list (if the user submits multiple SQLs at a time,
// multiple result sets will be generated)
String resultSet = jobInfo.getResultSetList(client)[0];
// 7. get resultContent
ResultSetResult resultSetResult = client.resultSet(ResultSetAction.builder().setPath(resultSet).setUser(jobExecuteResult.getUser()).build());
System.out.println("metadata: " + resultSetResult.getMetadata()); // column name type
System.out.println("res: " + resultSetResult.getFileContent()); //row data
} catch (Exception e) {
e.printStackTrace();// please use log
IOUtils.closeQuietly(client);
}
IOUtils.closeQuietly(client);
}
private static JobExecuteResult toSubmit(String user, String code) {
// 1. build params
// set label map :EngineTypeLabel/UserCreatorLabel/EngineRunTypeLabel/Tenant
Map<String, Object> labels = new HashMap<String, Object>();
labels.put(LabelKeyConstant.ENGINE_TYPE_KEY, "spark-2.4.3"); // required engineType Label
labels.put(LabelKeyConstant.USER_CREATOR_TYPE_KEY, user + "-APPName");// required execute user and creator eg:hadoop-IDE
labels.put(LabelKeyConstant.CODE_TYPE_KEY, "py"); // required codeType
// set start up map :engineConn start params
Map<String, Object> startupMap = new HashMap<String, Object>(16);
// Support setting engine native parameters,For example: parameters of engines such as spark/hive
startupMap.put("spark.executor.instances", 2);
// setting linkis params
startupMap.put("wds.linkis.rm.yarnqueue", "dws");
// 2. build jobSubmitAction
JobSubmitAction jobSubmitAction = JobSubmitAction.builder()
.addExecuteCode(code)
.setStartupParams(startupMap)
.setUser(user) //submit user
.addExecuteUser(user) // execute user
.setLabels(labels)
.build();
// 3. to execute
return client.submit(jobSubmitAction);
}
}
运行上述的代码即可以完成任务提交/执行/日志/结果集获取等
3. Scala测试代码
package org.apache.linkis.client.test
import org.apache.commons.io.IOUtils
import org.apache.commons.lang3.StringUtils
import org.apache.linkis.common.utils.Utils
import org.apache.linkis.httpclient.dws.authentication.StaticAuthenticationStrategy
import org.apache.linkis.httpclient.dws.config.DWSClientConfigBuilder
import org.apache.linkis.manager.label.constant.LabelKeyConstant
import org.apache.linkis.ujes.client.request._
import org.apache.linkis.ujes.client.response._
import java.util
import java.util.concurrent.TimeUnit
object LinkisClientTest {
// 1. build config: linkis gateway url
val clientConfig = DWSClientConfigBuilder.newBuilder()
.addServerUrl("http://127.0.0.1:9001/") //set linkis-mg-gateway url: http://{ip}:{port}
.connectionTimeout(30000) //connectionTimeOut
.discoveryEnabled(false) //disable discovery
.discoveryFrequency(1, TimeUnit.MINUTES) // discovery frequency
.loadbalancerEnabled(true) // enable loadbalance
.maxConnectionSize(5) // set max Connection
.retryEnabled(false) // set retry
.readTimeout(30000) //set read timeout
.setAuthenticationStrategy(new StaticAuthenticationStrategy()) //AuthenticationStrategy Linkis authen suppory static and Token
.setAuthTokenKey("hadoop") // set submit user
.setAuthTokenValue("hadoop") // set passwd or token (setAuthTokenValue("BML-AUTH"))
.setDWSVersion("v1") //linkis rest version v1
.build();
// 2. new Client(Linkis Client) by clientConfig
val client = UJESClient(clientConfig)
def main(args: Array[String]): Unit = {
val user = "hadoop" // execute user 用户需要和AuthTokenKey的值保持一致
val executeCode = "df=spark.sql(\"show tables\")\n" +
"show(df)"; // code support:sql/hql/py/scala
try {
// 3. build job and execute
println("user : " + user + ", code : [" + executeCode + "]")
// 推荐使用submit，支持传递任务label
val jobExecuteResult = toSubmit(user, executeCode)
println("execId: " + jobExecuteResult.getExecID + ", taskId: " + jobExecuteResult.taskID)
// 4. get job jonfo
var jobInfoResult = client.getJobInfo(jobExecuteResult)
var logFromLen = 0
val logSize = 100
val sleepTimeMills: Int = 1000
while (!jobInfoResult.isCompleted) {
// 5. get progress and log
val progress = client.progress(jobExecuteResult)
println("progress: " + progress.getProgress)
val logObj = client.log(jobExecuteResult, logFromLen, logSize)
logFromLen = logObj.fromLine
val logArray = logObj.getLog
// 0: info 1: warn 2: error 3: all
if (logArray != null && logArray.size >= 4 && StringUtils.isNotEmpty(logArray.get(3))) {
println(s"log: ${logArray.get(3)}")
}
Utils.sleepQuietly(sleepTimeMills)
jobInfoResult = client.getJobInfo(jobExecuteResult)
}
if (!jobInfoResult.isSucceed) {
println("Failed to execute job: " + jobInfoResult.getMessage)
throw new Exception(jobInfoResult.getMessage)
}
// 6. Get the result set list (if the user submits multiple SQLs at a time,
// multiple result sets will be generated)
val jobInfo = client.getJobInfo(jobExecuteResult)
val resultSetList = jobInfoResult.getResultSetList(client)
println("All result set list:")
resultSetList.foreach(println)
val oneResultSet = jobInfo.getResultSetList(client).head
// 7. get resultContent
val resultSetResult: ResultSetResult = client.resultSet(ResultSetAction.builder.setPath(oneResultSet).setUser(jobExecuteResult.getUser).build)
println("metadata: " + resultSetResult.getMetadata) // column name type
println("res: " + resultSetResult.getFileContent) //row data
} catch {
case e: Exception => {
e.printStackTrace() //please use log
}
}
IOUtils.closeQuietly(client)
}
def toSubmit(user: String, code: String): JobExecuteResult = {
// 1. build params
// set label map :EngineTypeLabel/UserCreatorLabel/EngineRunTypeLabel/Tenant
val labels: util.Map[String, Any] = new util.HashMap[String, Any]
labels.put(LabelKeyConstant.ENGINE_TYPE_KEY, "spark-2.4.3"); // required engineType Label
labels.put(LabelKeyConstant.USER_CREATOR_TYPE_KEY, user + "-APPName"); // 请求的用户和应用名，两个参数都不能少，其中APPName不能带有"-"建议替换为"_"
labels.put(LabelKeyConstant.CODE_TYPE_KEY, "py"); // 指定脚本类型
val startupMap = new java.util.HashMap[String, Any]()
// Support setting engine native parameters,For example: parameters of engines such as spark/hive
startupMap.put("spark.executor.instances", 2);
// setting linkis params
startupMap.put("wds.linkis.rm.yarnqueue", "default");
// 2. build jobSubmitAction
val jobSubmitAction = JobSubmitAction.builder
.addExecuteCode(code)
.setStartupParams(startupMap)
.setUser(user) //submit user
.addExecuteUser(user) //execute user
.setLabels(labels)
.build
// 3. to execute
client.submit(jobSubmitAction)
}
}