Java BlobProperties类代码示例

import com.microsoft.azure.storage.blob.BlobProperties; //导入依赖的package包/类
@Override
public Map<String, BlobMetaData> listBlobsByPrefix(String account, LocationMode mode, String container, String keyPath, String prefix) throws URISyntaxException, StorageException {
    // NOTE: this should be here: if (prefix == null) prefix = "";
    // however, this is really inefficient since deleteBlobsByPrefix enumerates everything and
    // then does a prefix match on the result; it should just call listBlobsByPrefix with the prefix!

    logger.debug("listing container [{}], keyPath [{}], prefix [{}]", container, keyPath, prefix);
    MapBuilder<String, BlobMetaData> blobsBuilder = MapBuilder.newMapBuilder();
    CloudBlobClient client = this.getSelectedClient(account, mode);
    CloudBlobContainer blobContainer = client.getContainerReference(container);

    SocketAccess.doPrivilegedVoidException(() -> {
        if (blobContainer.exists()) {
            for (ListBlobItem blobItem : blobContainer.listBlobs(keyPath + (prefix == null ? "" : prefix))) {
                URI uri = blobItem.getUri();
                logger.trace("blob url [{}]", uri);

                // uri.getPath is of the form /container/keyPath.* and we want to strip off the /container/
                // this requires 1 + container.length() + 1, with each 1 corresponding to one of the /
                String blobPath = uri.getPath().substring(1 + container.length() + 1);

                CloudBlockBlob blob = blobContainer.getBlockBlobReference(blobPath);

                // fetch the blob attributes from Azure (getBlockBlobReference does not do this)
                // this is needed to retrieve the blob length (among other metadata) from Azure Storage
                blob.downloadAttributes();

                BlobProperties properties = blob.getProperties();
                String name = blobPath.substring(keyPath.length());
                logger.trace("blob url [{}], name [{}], size [{}]", uri, name, properties.getLength());
                blobsBuilder.put(name, new PlainBlobMetaData(name, properties.getLength()));
            }
        }
    });

    return blobsBuilder.immutableMap();
}
 

import com.microsoft.azure.storage.blob.BlobProperties; //导入依赖的package包/类
/**
 * Return the actual data length of the blob with the specified properties.
 * If it is a page blob, you can't rely on the length from the properties
 * argument and you must get it from the file. Otherwise, you can.
 */
private long getDataLength(CloudBlobWrapper blob, BlobProperties properties)
  throws AzureException {
  if (blob instanceof CloudPageBlobWrapper) {
    try {
      return PageBlobInputStream.getPageBlobSize((CloudPageBlobWrapper) blob,
          getInstrumentedContext(
              isConcurrentOOBAppendAllowed()));
    } catch (Exception e) {
      throw new AzureException(
          "Unexpected exception getting page blob actual data size.", e);
    }
  }
  return properties.getLength();
}
 

import com.microsoft.azure.storage.blob.BlobProperties; //导入依赖的package包/类
protected MockCloudBlobWrapper(URI uri, HashMap<String, String> metadata,
    int length) {
  this.uri = uri;
  this.metadata = metadata;
  this.properties = new BlobProperties();
  
  this.properties=updateLastModifed(this.properties);
  this.properties=updateLength(this.properties,length);
}
 

import com.microsoft.azure.storage.blob.BlobProperties; //导入依赖的package包/类
protected BlobProperties updateLastModifed(BlobProperties properties){
  try{
      Method setLastModified =properties.getClass().
        getDeclaredMethod("setLastModified", Date.class);
      setLastModified.setAccessible(true);
      setLastModified.invoke(this.properties,
        Calendar.getInstance(TimeZone.getTimeZone("UTC")).getTime());
  }catch(Exception e){
      throw new RuntimeException(e);
  }
  return properties;
}
 

import com.microsoft.azure.storage.blob.BlobProperties; //导入依赖的package包/类
protected BlobProperties updateLength(BlobProperties properties,int length) {
  try{
      Method setLength =properties.getClass().
        getDeclaredMethod("setLength", long.class);
      setLength.setAccessible(true);
      setLength.invoke(this.properties, length);
  }catch (Exception e){
     throw new RuntimeException(e);
  }
  return properties;
}
 

import com.microsoft.azure.storage.blob.BlobProperties; //导入依赖的package包/类
protected void refreshProperties(boolean getMetadata) {
  if (backingStore.exists(convertUriToDecodedString(uri))) {
    byte[] content = backingStore.getContent(convertUriToDecodedString(uri));
    properties = new BlobProperties();
    this.properties=updateLastModifed(this.properties);
    this.properties=updateLength(this.properties, content.length);
    if (getMetadata) {
      metadata = backingStore.getMetadata(convertUriToDecodedString(uri));
    }
  }
}
 

import com.microsoft.azure.storage.blob.BlobProperties; //导入依赖的package包/类
/**
 * Return the actual data length of the blob with the specified properties.
 * If it is a page blob, you can't rely on the length from the properties
 * argument and you must get it from the file. Otherwise, you can.
 */
private long getDataLength(CloudBlobWrapper blob, BlobProperties properties)
  throws AzureException {
  if (blob instanceof CloudPageBlobWrapper) {
    try {
      return PageBlobInputStream.getPageBlobDataSize((CloudPageBlobWrapper) blob,
          getInstrumentedContext(
              isConcurrentOOBAppendAllowed()));
    } catch (Exception e) {
      throw new AzureException(
          "Unexpected exception getting page blob actual data size.", e);
    }
  }
  return properties.getLength();
}
 

import com.microsoft.azure.storage.blob.BlobProperties; //导入依赖的package包/类
/**
 * Contructs a StorageObjectSummary object from Azure BLOB properties
 * Using factory methods to create these objects since Azure can throw,
 * while retrieving the BLOB properties
 * @param listBlobItem an Azure ListBlobItem object
 * @return the ObjectSummary object created
 */
public static StorageObjectSummary createFromAzureListBlobItem(ListBlobItem listBlobItem)
  throws StorageProviderException
{
  String location, key, md5;
  long size;

  // Retrieve the BLOB properties that we need for the Summary
  // Azure Storage stores metadata inside each BLOB, therefore the listBlobItem
  // will point us to the underlying BLOB and will get the properties from it
  // During the process the Storage Client could fail, hence we need to wrap the
  // get calls in try/catch and handle possible exceptions
  try
  {
    location = listBlobItem.getContainer().getName();

    CloudBlob cloudBlob = (CloudBlob) listBlobItem;
    key = cloudBlob.getName();

    BlobProperties blobProperties = cloudBlob.getProperties();
    // the content md5 property is not always the actual md5 of the file. But for here, it's only
    // used for skipping file on PUT command, hense is ok.
    md5 = convertBase64ToHex(blobProperties.getContentMD5());
    size = blobProperties.getLength();
  }
  catch (URISyntaxException | StorageException ex)
  {
    // This should only happen if somehow we got here with and invalid URI (it should never happen)
    // ...or there is a Storage service error. Unlike S3, Azure fetches metadata from the BLOB itself,
    // and its a lazy operation
    throw new StorageProviderException(ex);
  }
  return new StorageObjectSummary(location, key, md5, size);

}
 

import com.microsoft.azure.storage.blob.BlobProperties; //导入依赖的package包/类
private BlobProperties getConfigBlobProperties() throws Exception {
    try {
        BlobProperties properties = azureClient.getBlobProperties(arguments.getContainer(), arguments.getBlobName());
        if (properties.getLength() > 0) {
            return properties;
        }
    } catch (StorageException e) {
        if (!isNotFoundError(e) && !isForbiddenError(e)) {
            throw e;
        }
    }
    return null;
}
 

import com.microsoft.azure.storage.blob.BlobProperties; //导入依赖的package包/类
@Override
public BlobProperties getProperties() {
  return getBlob().getProperties();
}
 

import com.microsoft.azure.storage.blob.BlobProperties; //导入依赖的package包/类
@Override
public BlobProperties getProperties() {
  return properties;
}
 

import com.microsoft.azure.storage.blob.BlobProperties; //导入依赖的package包/类
private CloudFile doCloudBlobCopy(CloudBlob source, int length) throws Exception {
    Calendar cal = new GregorianCalendar(TimeZone.getTimeZone("UTC"));
    cal.setTime(new Date());
    cal.add(Calendar.MINUTE, 5);
    
    // Source SAS must have read permissions
    SharedAccessBlobPolicy policy = new SharedAccessBlobPolicy();
    policy.setPermissions(EnumSet.of(SharedAccessBlobPermissions.READ));
    policy.setSharedAccessExpiryTime(cal.getTime());

    String sasToken = source.generateSharedAccessSignature(policy, null, null);

    // Get destination reference
    final CloudFile destination = this.share.getRootDirectoryReference().getFileReference("destination");
    
    // Start copy and wait for completion
    StorageCredentialsSharedAccessSignature credentials = new StorageCredentialsSharedAccessSignature(sasToken);
    Constructor<? extends CloudBlob> blobType = source.getClass().getConstructor(URI.class);
    String copyId = destination.startCopy(blobType.newInstance(credentials.transformUri(source.getUri())));
    FileTestHelper.waitForCopy(destination);
    destination.downloadAttributes();
    
    // Check original file references for equality
    assertEquals(CopyStatus.SUCCESS, destination.getCopyState().getStatus());
    assertEquals(source.getServiceClient().getCredentials().transformUri(source.getUri()).getPath(),
            destination.getCopyState().getSource().getPath());
    assertEquals(length, destination.getCopyState().getTotalBytes().intValue());
    assertEquals(length, destination.getCopyState().getBytesCopied().intValue());
    assertEquals(copyId, destination.getProperties().getCopyState().getCopyId());

    // Attempt to abort the completed copy operation.
    try {
        destination.abortCopy(destination.getCopyState().getCopyId());
        FileTestHelper.waitForCopy(destination);
        fail();
    }
    catch (StorageException ex) {
        assertEquals(HttpURLConnection.HTTP_CONFLICT, ex.getHttpStatusCode());
    }

    assertNotNull(destination.getProperties().getEtag());
    assertFalse(source.getProperties().getEtag().equals(destination.getProperties().getEtag()));

    source.downloadAttributes();
    FileProperties prop1 = destination.getProperties();
    BlobProperties prop2 = source.getProperties();

    assertEquals(prop1.getCacheControl(), prop2.getCacheControl());
    assertEquals(prop1.getContentEncoding(), prop2.getContentEncoding());
    assertEquals(prop1.getContentLanguage(), prop2.getContentLanguage());
    assertEquals(prop1.getContentMD5(), prop2.getContentMD5());
    assertEquals(prop1.getContentType(), prop2.getContentType());

    assertEquals("value", destination.getMetadata().get("Test"));
    return destination;
}
 

import com.microsoft.azure.storage.blob.BlobProperties; //导入依赖的package包/类
@Test
public void testFileCopyFromBlobWithSasAndSnapshot()
        throws URISyntaxException, StorageException, InterruptedException, IOException, InvalidKeyException {
    String blobName = BlobTestHelper.generateRandomBlobNameWithPrefix("testblob");
    CloudBlobContainer container = TestHelper.createCloudBlobClient().getContainerReference(BlobTestHelper.generateRandomContainerName());
    container.createIfNotExists();
    CloudBlockBlob source = container.getBlockBlobReference(blobName);
    String data = "String data";
    source.uploadText(data, Constants.UTF8_CHARSET, null, null, null);

    byte[] buffer = BlobTestHelper.getRandomBuffer(512);
    ByteArrayInputStream stream = new ByteArrayInputStream(buffer);
    source.upload(stream, buffer.length);
    source.getMetadata().put("Test", "value");
    source.uploadMetadata();

    SharedAccessFilePolicy policy = createSharedAccessPolicy(
            EnumSet.of(SharedAccessFilePermissions.READ, SharedAccessFilePermissions.WRITE,
                  SharedAccessFilePermissions.LIST, SharedAccessFilePermissions.DELETE), 5000);

    CloudFile copy = this.share.getRootDirectoryReference().getFileReference("copy");
    String sasToken = copy.generateSharedAccessSignature(policy, null);
    CloudFile copySas = new CloudFile(new URI(copy.getUri().toString() + "?" + sasToken));
    
    // Generate account SAS for the source
    // Cannot generate a SAS directly on a snapshot and the SAS for the destination is only for the destination
    SharedAccessAccountPolicy accountPolicy = new SharedAccessAccountPolicy();
    accountPolicy.setPermissions(EnumSet.of(SharedAccessAccountPermissions.READ, SharedAccessAccountPermissions.WRITE));
    accountPolicy.setServices(EnumSet.of(SharedAccessAccountService.BLOB));
    accountPolicy.setResourceTypes(EnumSet.of(SharedAccessAccountResourceType.OBJECT, SharedAccessAccountResourceType.CONTAINER));
    accountPolicy.setSharedAccessExpiryTime(policy.getSharedAccessExpiryTime());
    final CloudBlobClient sasClient = TestHelper.createCloudBlobClient(accountPolicy, false);

    CloudBlockBlob snapshot = (CloudBlockBlob) source.createSnapshot();
    CloudBlockBlob sasBlob = (CloudBlockBlob) sasClient.getContainerReference(container.getName())
            .getBlobReferenceFromServer(snapshot.getName(), snapshot.getSnapshotID(), null, null, null);
    sasBlob.exists();

    String copyId = copySas.startCopy(BlobTestHelper.defiddler(sasBlob));
    FileTestHelper.waitForCopy(copySas);
    
    copySas.downloadAttributes();
    FileProperties prop1 = copySas.getProperties();
    BlobProperties prop2 = sasBlob.getProperties();

    assertEquals(prop1.getCacheControl(), prop2.getCacheControl());
    assertEquals(prop1.getContentEncoding(), prop2.getContentEncoding());
    assertEquals(prop1.getContentDisposition(),
            prop2.getContentDisposition());
    assertEquals(prop1.getContentLanguage(), prop2.getContentLanguage());
    assertEquals(prop1.getContentMD5(), prop2.getContentMD5());
    assertEquals(prop1.getContentType(), prop2.getContentType());

    assertEquals("value", copySas.getMetadata().get("Test"));
    assertEquals(copyId, copySas.getCopyState().getCopyId());

    snapshot.delete();
    source.delete();
    copySas.delete();
    container.delete();
}
 

import com.microsoft.azure.storage.blob.BlobProperties; //导入依赖的package包/类
private BlobProperties getObjectMetadata(CloudBlob object) {

		BlobProperties metadata = null;

		if (object != null) {
			metadata = object.getProperties();
		}

		return metadata;

	}
 

import com.microsoft.azure.storage.blob.BlobProperties; //导入依赖的package包/类
/**
 * Returns the blob's properties.
 * 
 * @return A {@link BlobProperties} object that represents the properties of
 *         the blob.
 */
BlobProperties getProperties();