Examples of co.cask.cdap.api.dataset.DatasetAdmin

co.cask.cdap.api.dataset.DatasetAdmin
Defines the minimum administrative operations a dataset should support. There are no strong strict requirements on what is expected from each operation. Every dataset implementation figures out what is the best for itself. NOTE: even though seems to be not required, the list of common operations helps to bring better structure to dataset administration design and better guide the design of new datasets.

    });
  }


  @VisibleForTesting
  void clear() throws Exception {
    DatasetAdmin admin = dsFramework.getAdmin(APP_META_TABLE, null);
    if (admin != null) {
      admin.truncate();
    }
  }

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    ScheduleStoreTableUtil.setupDatasets(framework);


    // Upgrade all datasets
    for (DatasetSpecification spec : framework.getInstances()) {
      System.out.println(String.format("Upgrading dataset: %s, spec: %s", spec.getName(), spec.toString()));
      DatasetAdmin admin = framework.getAdmin(spec.getName(), null);
      // we know admin is not null, since we are looping over existing datasets
      admin.upgrade();
      System.out.println(String.format("Upgraded dataset: %s", spec.getName()));
    }
  }

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      if (namespace.fromNamespaced(tableName) != null) {
        System.out.println(String.format("Upgrading hbase table: %s, desc: %s", tableName, desc.toString()));


        final boolean supportsIncrement =
          "true".equalsIgnoreCase(desc.getValue(OrderedTable.PROPERTY_READLESS_INCREMENT));
        DatasetAdmin admin = new AbstractHBaseDataSetAdmin(tableName, hConf, hBaseTableUtil) {
          @Override
          protected CoprocessorJar createCoprocessorJar() throws IOException {
            return HBaseOrderedTableAdmin.createCoprocessorJarInternal(cConf,
                                                                       injector.getInstance(LocationFactory.class),
                                                                       hBaseTableUtil,
                                                                       supportsIncrement);
          }


          @Override
          protected boolean upgradeTable(HTableDescriptor tableDescriptor) {
            // we don't do any other changes apart from coprocessors upgrade
            return false;
          }


          @Override
          public void create() throws IOException {
            // no-op
            throw new UnsupportedOperationException("This DatasetAdmin is only used for upgrade() operation");
          }
        };
        admin.upgrade();
        System.out.println(String.format("Upgraded hbase table: %s", tableName));
      }
    }
  }

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    return DatasetsUtil.getOrCreateDataset(dsFramework, getMetaTableName(), OrderedTable.class.getName(),
                                           DatasetProperties.EMPTY, DatasetDefinition.NO_ARGUMENTS, null);
  }


  public void upgrade() throws Exception {
    DatasetAdmin admin = dsFramework.getAdmin(getMetaTableName(), null);
    if (admin != null) {
      admin.upgrade();
    }
  }

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  @POST
  @Path("/data/datasets/{name}/admin/exists")
  public void exists(HttpRequest request, HttpResponder responder, @PathParam("name") String instanceName) {
    try {
      DatasetAdmin datasetAdmin = getDatasetAdmin(instanceName);
      responder.sendJson(HttpResponseStatus.OK, new DatasetAdminOpResponse(datasetAdmin.exists(), null));
    } catch (HandlerException e) {
      LOG.debug("Got handler exception", e);
      responder.sendError(e.getFailureStatus(), StringUtils.defaultIfEmpty(e.getMessage(), ""));
    } catch (Exception e) {
      LOG.error(getAdminOpErrorMessage("exists", instanceName), e);

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      responder.sendError(HttpResponseStatus.BAD_REQUEST, msg);
      return;
    }


    DatasetSpecification spec = type.configure(name, props);
    DatasetAdmin admin = type.getAdmin(spec);
    admin.create();
    responder.sendJson(HttpResponseStatus.OK, spec);
  }

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      LOG.error(msg);
      responder.sendError(HttpResponseStatus.BAD_REQUEST, msg);
      return;
    }


    DatasetAdmin admin = type.getAdmin(spec);
    admin.drop();
    responder.sendJson(HttpResponseStatus.OK, spec);
  }

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  @POST
  @Path("/data/datasets/{name}/admin/truncate")
  public void truncate(HttpRequest request, HttpResponder responder, @PathParam("name") String instanceName) {
    try {
      DatasetAdmin datasetAdmin = getDatasetAdmin(instanceName);
      datasetAdmin.truncate();
      responder.sendJson(HttpResponseStatus.OK, new DatasetAdminOpResponse(null, null));
    } catch (HandlerException e) {
      LOG.debug("Got handler exception", e);
      responder.sendError(e.getFailureStatus(), StringUtils.defaultIfEmpty(e.getMessage(), ""));
    } catch (Exception e) {

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  @POST
  @Path("/data/datasets/{name}/admin/upgrade")
  public void upgrade(HttpRequest request, HttpResponder responder, @PathParam("name") String instanceName) {
    try {
      DatasetAdmin datasetAdmin = getDatasetAdmin(instanceName);
      datasetAdmin.upgrade();
      responder.sendJson(HttpResponseStatus.OK, new DatasetAdminOpResponse(null, null));
    } catch (HandlerException e) {
      LOG.debug("Got handler exception", e);
      responder.sendError(e.getFailureStatus(), StringUtils.defaultIfEmpty(e.getMessage(), ""));
    } catch (Exception e) {

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  private String getAdminOpErrorMessage(String opName, String instanceName) {
    return String.format("Error executing admin operation %s for dataset instance %s", opName, instanceName);
  }


  private DatasetAdmin getDatasetAdmin(String instanceName) throws IOException, DatasetManagementException {
    DatasetAdmin admin = dsFramework.getAdmin(instanceName, null);
    if (admin == null) {
      throw new HandlerException(HttpResponseStatus.NOT_FOUND,
                                 "Couldn't obtain DatasetAdmin for dataset instance " + instanceName);
    }
    return admin;

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