Examples of com.cloudera.cdk.data.MetadataProvider

com.cloudera.cdk.data.MetadataProvider

A service provider interface for metadata system plugins.

Implementations of {@link DatasetRepository} are written against thisinterface and, by extension, can store dataset metadata information contained in the {@link DatasetDescriptor} in a system of the user's choosing.

Implementations of {@link MetadataProvider} are typically not thread-safe; that is,the behavior when accessing a single instance from multiple threads is undefined.


    // We only do the deeper implementation checks one per combination.
    Assert.assertNotNull("Received a repository", repository);
    Assert.assertTrue("Repo is a FileSystem repo",
        repository instanceof FileSystemDatasetRepository);
    MetadataProvider provider = ((FileSystemDatasetRepository) repository)
        .getMetadataProvider();
    Assert.assertTrue("Repo is using a FileSystemMetadataProvider",
        provider instanceof FileSystemMetadataProvider);
    FileSystemMetadataProvider fsProvider = (FileSystemMetadataProvider) provider;
    Assert.assertTrue("FileSystem is a LocalFileSystem",

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    // We only do the deeper implementation checks one per combination.
    Assert.assertNotNull("Received a repository", repository);
    Assert.assertTrue("Repo is a FileSystem repo",
        repository instanceof FileSystemDatasetRepository);
    MetadataProvider provider = ((FileSystemDatasetRepository) repository)
        .getMetadataProvider();
    Assert.assertTrue("Repo is using a FileSystemMetadataProvider",
        provider instanceof FileSystemMetadataProvider);
    FileSystemMetadataProvider fsProvider = (FileSystemMetadataProvider) provider;
    Assert.assertTrue("FileSystem is a DistributedFileSystem",

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    DatasetRepository repo = DatasetRepositories.open("repo:hive");


    Assert.assertNotNull("Received a repository", repo);
    Assert.assertTrue("Repo should be a HCatalogDatasetRepository",
        repo instanceof HCatalogDatasetRepository);
    MetadataProvider provider = ((HCatalogDatasetRepository) repo)
        .getMetadataProvider();
    Assert.assertTrue("Repo is using a HCatalogManagedMetadataProvider",
        provider instanceof HCatalogManagedMetadataProvider);
  }

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        "repo:hive:/");


    Assert.assertNotNull("Received a repository", repo);
    Assert.assertTrue("Repo should be a HCatalogDatasetRepository",
        repo instanceof HCatalogDatasetRepository);
    MetadataProvider provider = ((HCatalogDatasetRepository) repo)
        .getMetadataProvider();
    Assert.assertTrue("Repo is using a HCatalogManagedMetadataProvider",
        provider instanceof HCatalogManagedMetadataProvider);
  }

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        "&hdfs-port=" + hdfsUri.getPort());


    Assert.assertNotNull("Received a repository", repo);
    org.junit.Assert.assertTrue("Repo is a FileSystem repo",
        repo instanceof FileSystemDatasetRepository);
    MetadataProvider provider = ((FileSystemDatasetRepository) repo)
        .getMetadataProvider();
    Assert.assertTrue("Repo is using a HCatalogExternalMetadataProvider",
        provider instanceof HCatalogExternalMetadataProvider);


    // verify location
    DatasetDescriptor created = provider.create("test",
        new DatasetDescriptor.Builder()
        .schemaLiteral("\"string\"")
        .build());
    Assert.assertEquals("Location should be in HDFS",
        "hdfs", created.getLocation().getScheme());

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Related Classes of com.cloudera.cdk.data.MetadataProvider

com.cloudera.cdk.data.filesystem.TestFileSystemURIs

com.cloudera.cdk.data.hcatalog.TestHiveURIs

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