MaxCompute:External Volume SDK说明

Dependências do projeto

Antes de usar o SDK para operar External Volumes, adicione as seguintes dependências.

<dependency>
  <groupId>com.aliyun.odps</groupId>
  <artifactId>odps-sdk-core</artifactId>
  <version>${Latest Version}</version>
</dependency>

Criar um External Volume

• Crie

  /**
  * 创建 External Volume
  * @param builder volume 的参数配置
  * @throws OdpsException
  */
  public void create(VolumeBuilder builder) throws OdpsException
  
      /**
  * 创建External Volume
  *
  * @param volumeName volume名称
  * @param comment
  * @param type 创建原有Volume传入 {@link Volume}.Type.Old,创建新VolumeFS功能的volume传入{@link Volume}
  *        .Type.New。VolumeFS特性需要Project开启该功能才可使用
  * @throws OdpsException
  */
  public void create(String volumeName, String comment, Volume.Type type)
  
      /**
  * 创建External Volume
  *
  * @param projectName 目标External Volume所在Project名称
  * @param volumeName 所要创建的volume名
  * @param comment
  * @param type 创建原有Volume传入 {@link Volume}.Type.Old,创建新VolumeFS功能的volume传入{@link Volume}
  *        .Type.New。VolumeFS特性需要Project开启该功能才可使用
  * @throws OdpsException
  */
  public void create(String projectName, String volumeName, String comment, Volume.Type type)
  
      /**
  * 创建Volume
  *
  * @param projectName 目标External Volume所在Project名称
  * @param volumeName 所要创建的volume名
  * @param comment
  * @param type 创建原有Volume传入 {@link Volume}.Type.Old,创建新VolumeFS功能的volume传入{@link Volume}
  *        .Type.New。VolumeFS特性需要Project开启该功能才可使用
  * @param lifecycle 生命周期
  * @throws OdpsException
  */
  public void create(String projectName, String volumeName, String comment, Volume.Type type, Long lifecycle) throws OdpsException
  

• Exemplo de Crie

  /*
   创建External Volume
  */
  
  public void createExternalVolume() throws Exception {
      String projectName = "test_project";
      String extVolumeName = "test_ext_1";
      String externalLocation = "oss://...";
      
      Long lifecycle;
      String comment;
      String roleArn;
      
      Volumes.VolumeBuilder builder = new Volumes.VolumeBuilder();
          
      builder.project(projectName).volumeName(extVolumeName).type(Volume.Type.EXTERNAL).extLocation(externalLocation);
          
      if (lifecycle != null) {
          builder.lifecycle(lifecycle);
      }
          
      if (comment != null) {
          builder.comment(comment);
      }
          
      if (roleArn != null) {
          builder.addProperty(Volumes.EXTERNAL_VOLUME_ROLEARN_KEY, roleArn);
      }
          
      getCurrentOdps().volumes().create(builder);  
  }

Obter informações de um External Volume específico

• Get

  /**
  * 获取指定External Volume信息
  *
  * @param volumeName Volume名
  * @return
  */
  public Volume get(String volumeName)
  
  /**
  * 获取指定External Volume信息
  *
  * @param projectName 所在Project名称
  * @param volumeName  External Volume名
  * @return
  */
  public Volume get(String projectName, String volumeName)
  

• Exemplo de Get

  /*
  获取External Volume信息
  */
  public Volume getVolume() {
      String projectName = "test_project";
      String extVolumeName = "test_ext_1";
  
      Volume volume = odps.volumes().get(projectName, extVolumeName);
      return volume;
  }

Obter iterador de informações de External Volume

• Iterator

  /**
  * 获取默认Project的所有Volume信息迭代器
  *
  * @return Volume迭代器
  */
  public Iterator<Volume> iterator() 
  
      /**
  * 获取Volume信息迭代器
  *
  * @param projectName 指定Project名称
  * @return Volume迭代器
  */
  public Iterator<Volume> iterator(final String projectName)
  
      /**
  * 获取Volume信息迭代器
  *
  * @param filter 过滤条件
  * @return Volume迭代器
  */
  public Iterator<Volume> iterator(final VolumeFilter filter)
  
      /**
  * 获取Volume信息迭代器
  *
  * @param projectName 所在Project名称
  * @param filter 过滤条件
  * @return Volume迭代器
  */
  public Iterator<Volume> iterator(final String projectName, final VolumeFilter filter)

• Exemplo de Iterator

  /*
  获取volume迭代器
  */
  public Iterator<Volume> getVolumeIterator() {
      String projectName = "test_project";
      String extVolumeName = "test_ext_1";
  
      VolumeFilter volumeFilter = new VolumeFilter();
      volumeFilter.setName(extVolumeName);
  
      Iterator<Volume> iterator = odps.volumes().iterator(projectName, volumeFilter);
      return iterator;
  }

Excluir External Volume

• Exclua

  /**
  * 删除External Volume
  *
  * @param volumeName External Volume名
  * @throws OdpsException
  */
  public void delete(String volumeName)
  
  /**
  * 删除External Volume
  *
  * @param projectName External Volume所在Project
  * @param volumeName External Volume名
  * @throws OdpsException
  */
  public void delete(String projectName, String volumeName)

• Exemplo de Exclua

  /*
  删除External Volume
  */
  public void deleteVolume() {
      String projectName = "test_project";
      String extVolumeName = "test_ext_1";
  
      try {
          odps.volumes().delete(projectName, extVolumeName);
      } catch (OdpsException e) {
          throw new RuntimeException(e);
      }
  }