Java AccessCondition.generateIfMatchCondition方法代码示例

import com.microsoft.azure.storage.AccessCondition; //导入方法依赖的package包/类
@Test
@Category({ DevFabricTests.class, DevStoreTests.class })
public void testBlobMultiConditionHeaders() throws URISyntaxException, StorageException, IOException {
    final String blockBlobName = BlobTestHelper.generateRandomBlobNameWithPrefix("testBlockBlob");
    final CloudBlockBlob blockBlobRef = this.container.getBlockBlobReference(blockBlobName);

    final int length = 2 * 1024;
    ByteArrayInputStream srcStream = BlobTestHelper.getRandomDataStream(length);
    OperationContext context = new OperationContext();
    blockBlobRef.upload(srcStream, -1, null, null, context);

    AccessCondition condition = AccessCondition.generateIfMatchCondition(context.getLastResult().getEtag());
    condition.setIfUnmodifiedSinceDate(context.getLastResult().getStartDate());

    StorageEvent<SendingRequestEvent> event = new StorageEvent<SendingRequestEvent>() {

        @Override
        public void eventOccurred(SendingRequestEvent eventArg) {
            HttpURLConnection connection = (HttpURLConnection) eventArg.getConnectionObject();
            assertNotNull(connection.getRequestProperty("If-Unmodified-Since"));
            assertNotNull(connection.getRequestProperty("If-Match"));
        }
    };

    context.getSendingRequestEventHandler().addListener(event);

    blockBlobRef.upload(srcStream, -1, condition, null, context);
}
 

import com.microsoft.azure.storage.AccessCondition; //导入方法依赖的package包/类
/**
 * Initializes a new instance of the BlobInputStream class.
 * 
 * @param parentBlob
 *            A {@link CloudBlob} object which represents the blob that this stream is associated with.
 * @param accessCondition
 *            An {@link AccessCondition} object which represents the access conditions for the blob.
 * @param options
 *            A {@link BlobRequestOptions} object which represents that specifies any additional options for the
 *            request.
 * @param opContext
 *            An {@link OperationContext} object which is used to track the execution of the operation.
 * 
 * @throws StorageException
 *             An exception representing any error which occurred during the operation.
 */
@DoesServiceRequest
protected BlobInputStream(final CloudBlob parentBlob, final AccessCondition accessCondition,
        final BlobRequestOptions options, final OperationContext opContext) throws StorageException {
    this.parentBlobRef = parentBlob;
    this.parentBlobRef.assertCorrectBlobType();
    this.options = new BlobRequestOptions(options);
    this.opContext = opContext;
    this.streamFaulted = false;
    this.currentAbsoluteReadPosition = 0;
    this.readSize = parentBlob.getStreamMinimumReadSizeInBytes();

    if (options.getUseTransactionalContentMD5() && this.readSize > 4 * Constants.MB) {
        throw new IllegalArgumentException(SR.INVALID_RANGE_CONTENT_MD5_HEADER);
    }

    parentBlob.downloadAttributes(accessCondition, this.options, this.opContext);

    this.retrievedContentMD5Value = parentBlob.getProperties().getContentMD5();

    // Will validate it if it was returned
    this.validateBlobMd5 = !options.getDisableContentMD5Validation()
            && !Utility.isNullOrEmpty(this.retrievedContentMD5Value);

    // Validates the first option, and sets future requests to use if match
    // request option.

    // If there is an existing conditional validate it, as we intend to
    // replace if for future requests.
    String previousLeaseId = null;
    if (accessCondition != null) {
        previousLeaseId = accessCondition.getLeaseID();

        if (!accessCondition.verifyConditional(this.parentBlobRef.getProperties().getEtag(), this.parentBlobRef
                .getProperties().getLastModified())) {
            throw new StorageException(StorageErrorCode.CONDITION_FAILED.toString(),
                    SR.INVALID_CONDITIONAL_HEADERS, HttpURLConnection.HTTP_PRECON_FAILED, null, null);
        }
    }

    this.accessCondition = AccessCondition.generateIfMatchCondition(this.parentBlobRef.getProperties().getEtag());
    this.accessCondition.setLeaseID(previousLeaseId);

    this.streamLength = parentBlob.getProperties().getLength();

    if (this.validateBlobMd5) {
        try {
            this.md5Digest = MessageDigest.getInstance("MD5");
        }
        catch (final NoSuchAlgorithmException e) {
            // This wont happen, throw fatal.
            throw Utility.generateNewUnexpectedStorageException(e);
        }
    }

    this.reposition(0);
}
 

import com.microsoft.azure.storage.AccessCondition; //导入方法依赖的package包/类
/**
 * Initializes a new instance of the FileInputStream class.
 * 
 * @param parentFile
 *            A {@link CloudFile} object which represents the file that this stream is associated with.
 * @param accessCondition
 *            An {@link AccessCondition} object which represents the access conditions for the file.
 * @param options
 *            A {@link FileRequestOptions} object which represents that specifies any additional options for the
 *            request.
 * @param opContext
 *            An {@link OperationContext} object which is used to track the execution of the operation.
 * 
 * @throws StorageException
 *             An exception representing any error which occurred during the operation.
 */
@DoesServiceRequest
protected FileInputStream(final CloudFile parentFile, final AccessCondition accessCondition,
        final FileRequestOptions options, final OperationContext opContext) throws StorageException {
    this.parentFileRef = parentFile;
    this.options = new FileRequestOptions(options);
    this.opContext = opContext;
    this.streamFaulted = false;
    this.currentAbsoluteReadPosition = 0;
    this.readSize = parentFile.getStreamMinimumReadSizeInBytes();

    if (options.getUseTransactionalContentMD5() && this.readSize > 4 * Constants.MB) {
        throw new IllegalArgumentException(SR.INVALID_RANGE_CONTENT_MD5_HEADER);
    }

    parentFile.downloadAttributes(accessCondition, this.options, this.opContext);

    this.retrievedContentMD5Value = parentFile.getProperties().getContentMD5();

    // Will validate it if it was returned
    this.validateFileMd5 = !options.getDisableContentMD5Validation()
            && !Utility.isNullOrEmpty(this.retrievedContentMD5Value);

    String previousLeaseId = null;
    if (accessCondition != null) {
        previousLeaseId = accessCondition.getLeaseID();
    }

    this.accessCondition = AccessCondition.generateIfMatchCondition(this.parentFileRef.getProperties().getEtag());
    this.accessCondition.setLeaseID(previousLeaseId);

    this.streamLength = parentFile.getProperties().getLength();

    if (this.validateFileMd5) {
        try {
            this.md5Digest = MessageDigest.getInstance("MD5");
        }
        catch (final NoSuchAlgorithmException e) {
            // This wont happen, throw fatal.
            throw Utility.generateNewUnexpectedStorageException(e);
        }
    }

    this.reposition(0);
}