# 取消截图任务
#### 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只能是正在截图任务队列中排队的。已开始或已完成的截图任务不能删除。
 
#### 核心代码
```
// 发送取消截图任务请求给媒体处理服务
DeleteThumbnailsTaskRequest req = new DeleteThumbnailsTaskRequest().withTaskId("2210744");
DeleteThumbnailsTaskResponse rsp = initMpcClient().deleteThumbnailsTask(req);
// 返回消息
System.out.println("DeleteThumbnailsTaskResponse=" + JsonUtils.toJSON(rsp));
```
#### 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.core.utils.JsonUtils;
import com.huaweicloud.sdk.mpc.v1.MpcClient;
import com.huaweicloud.sdk.mpc.v1.model.DeleteThumbnailsTaskRequest;
import com.huaweicloud.sdk.mpc.v1.model.DeleteThumbnailsTaskResponse;
import com.obs.services.internal.ServiceException;
public class TestDeleteThumbnail {
    /**
     * 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();
    }
    /**
     * 取消截图任务
     * @param args
     */
    public static void main(String[] args) {
        DeleteThumbnailsTaskRequest req = new DeleteThumbnailsTaskRequest().withTaskId("2210744");
        try {
            DeleteThumbnailsTaskResponse rsp = initMpcClient().deleteThumbnailsTask(req);
            System.out.println("DeleteThumbnailsTaskResponse=" + JsonUtils.toJSON(rsp));
        } catch (ClientRequestException | ConnectionException | RequestTimeoutException | ServiceException e) {
            System.out.println(e);
        }
    }
}
```