# 取消转封装任务
#### 说明
- 取消任务需要用户提供所要取消任务的taskId。
- 待取消的taskId只能是正在任务队列中排队的任务。已开始或已完成的转封装任务不能删除。
 
#### 核心代码
```
// 设置需要取消的任务ID
CancelRemuxTaskRequest req = new CancelRemuxTaskRequest().withTaskId("8191203");
// 发送消息到转码服务
CancelRemuxTaskResponse rsp = initMpcClient().cancelRemuxTask(req);
System.out.println("rsp=" + rsp.toString());
```
#### 完整代码
```
import com.huaweicloud.sdk.core.auth.BasicCredentials;
import com.huaweicloud.sdk.core.exception.ClientRequestException;
import com.huaweicloud.sdk.core.exception.ConnectionException;
import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
import com.huaweicloud.sdk.core.http.HttpConfig;
import com.huaweicloud.sdk.mpc.v1.MpcClient;
import com.huaweicloud.sdk.mpc.v1.model.CancelRemuxTaskRequest;
import com.huaweicloud.sdk.mpc.v1.model.CancelRemuxTaskResponse;
import com.obs.services.internal.ServiceException;
public class TestDeleteRemux {
    /**
     * 初始化 MpcClient
     * @return
     */
    public static MpcClient initMpcClient() {
        HttpConfig httpConfig = HttpConfig.getDefaultHttpConfig().withIgnoreSSLVerification(true).withTimeout(3);
        //http代理设置，请根据实际情况设置
        //httpConfig.withProxyHost("xxxxxx").withProxyPort(xxxxxx).withProxyUsername("xxxxxx").
        //        withProxyPassword("xxxxxx");
        //根据实际填写ak,sk，在控制台账号名下“我的凭证 > 访问密钥”上创建和查看您的AK/SK
        
        String ak = System.getenv("SDK_AK");
        String sk = System.getenv("SDK_SK");
        //根据实际填写项目ID，在控制台账号名下“我的凭证 > API凭证”下查看您的项目ID
        String projectId = System.getenv("PROJECT_ID");
        //根据实际填写所需endpoint，这里以“region01”为例
        String endpoint = "https://mpc.region01.myhuaweicloud.com";
        BasicCredentials auth = new BasicCredentials().withAk(ak).withSk(sk).withProjectId(projectId);
        return MpcClient.newBuilder()
                .withHttpConfig(httpConfig)
                .withCredential(auth)
                .withEndpoint(endpoint)
                .build();
    }
    /**
     * 取消排队中的转封装任务
     * @param args
     */
    public static void main(String[] args) {
        CancelRemuxTaskRequest req = new CancelRemuxTaskRequest().withTaskId("8191203");
        try {
            CancelRemuxTaskResponse rsp = initMpcClient().cancelRemuxTask(req);
            System.out.println("rsp=" + rsp.toString());
        } catch (ClientRequestException | ConnectionException | RequestTimeoutException | ServiceException e) {
            System.out.println(e);
        }
    }
}
```