Package com.azure.storage.blob.specialized

Class AppendBlobAsyncClient

    • Field Detail

      • MAX_APPEND_BLOCK_BYTES

        public static final int MAX_APPEND_BLOCK_BYTES
        Indicates the maximum number of bytes that can be sent in a call to appendBlock.
        See Also:
        Constant Field Values

      • MAX_BLOCKS

        public static final int MAX_BLOCKS
        Indicates the maximum number of blocks allowed in an append blob.
        See Also:
        Constant Field Values

    • Method Detail

      • create

        public Mono<AppendBlobItem> create()
        Creates a 0-length append blob. Call appendBlock to append data to an append blob. By default this method will not overwrite an existing blob.

        Code Samples

         client.create().subscribe(response ->
     System.out.printf("Created AppendBlob at %s%n", response.getLastModified()));
        Returns:
        A Mono containing the information of the created appended blob.

      • create

        public Mono<AppendBlobItem> create​(boolean overwrite)
        Creates a 0-length append blob. Call appendBlock to append data to an append blob.

        Code Samples

         boolean overwrite = false; // Default behavior
 client.create(overwrite).subscribe(response ->
     System.out.printf("Created AppendBlob at %s%n", response.getLastModified()));
        Parameters:
        overwrite - Whether to overwrite, should data exist on the blob.
        Returns:
        A Mono containing the information of the created appended blob.

      • createWithResponse

        public Mono<com.azure.core.http.rest.Response<AppendBlobItem>> createWithResponse​(BlobHttpHeaders headers,
                                                                                  Map<String,​String> metadata,
                                                                                  BlobRequestConditions requestConditions)
        Creates a 0-length append blob. Call appendBlock to append data to an append blob.

        To avoid overwriting, pass "*" to BlobRequestConditions.setIfNoneMatch(String).

        Code Samples

         BlobHttpHeaders headers = new BlobHttpHeaders()
     .setContentType("binary")
     .setContentLanguage("en-US");
 Map<String, String> metadata = Collections.singletonMap("metadata", "value");
 BlobRequestConditions requestConditions = new BlobRequestConditions().setLeaseId(leaseId)
     .setIfUnmodifiedSince(OffsetDateTime.now().minusDays(3));

 client.createWithResponse(headers, metadata, requestConditions).subscribe(response ->
     System.out.printf("Created AppendBlob at %s%n", response.getValue().getLastModified()));
        Parameters:
        headers - BlobHttpHeaders
        metadata - Metadata to associate with the blob. If there is leading or trailing whitespace in any metadata key or value, it must be removed or encoded.
        requestConditions - BlobRequestConditions
        Returns:
        A Mono containing Response whose value contains the created appended blob.

      • createWithResponse

        public Mono<com.azure.core.http.rest.Response<AppendBlobItem>> createWithResponse​(AppendBlobCreateOptions options)
        Creates a 0-length append blob. Call appendBlock to append data to an append blob.

        To avoid overwriting, pass "*" to BlobRequestConditions.setIfNoneMatch(String).

        Code Samples

         BlobHttpHeaders headers = new BlobHttpHeaders()
     .setContentType("binary")
     .setContentLanguage("en-US");
 Map<String, String> metadata = Collections.singletonMap("metadata", "value");
 Map<String, String> tags = Collections.singletonMap("tag", "value");
 BlobRequestConditions requestConditions = new BlobRequestConditions().setLeaseId(leaseId)
     .setIfUnmodifiedSince(OffsetDateTime.now().minusDays(3));

 client.createWithResponse(new AppendBlobCreateOptions().setHeaders(headers).setMetadata(metadata)
     .setTags(tags).setRequestConditions(requestConditions)).subscribe(response ->
     System.out.printf("Created AppendBlob at %s%n", response.getValue().getLastModified()));
        Parameters:
        options - AppendBlobCreateOptions
        Returns:
        A Mono containing Response whose value contains the created appended blob.

      • appendBlock

        public Mono<AppendBlobItem> appendBlock​(Flux<ByteBuffer> data,
                                        long length)
        Commits a new block of data to the end of the existing append blob.

        Note that the data passed must be replayable if retries are enabled (the default). In other words, the Flux must produce the same data each time it is subscribed to.

        Code Samples

         client.appendBlock(data, length).subscribe(response ->
     System.out.printf("AppendBlob has %d committed blocks%n", response.getBlobCommittedBlockCount()));
        Parameters:
        data - The data to write to the blob. Note that this Flux must be replayable if retries are enabled (the default). In other words, the Flux must produce the same data each time it is subscribed to.
        length - The exact length of the data. It is important that this value match precisely the length of the data emitted by the Flux.
        Returns:
        Mono containing the information of the append blob operation.

      • appendBlockWithResponse

        public Mono<com.azure.core.http.rest.Response<AppendBlobItem>> appendBlockWithResponse​(Flux<ByteBuffer> data,
                                                                                       long length,
                                                                                       byte[] contentMd5,
                                                                                       AppendBlobRequestConditions appendBlobRequestConditions)
        Commits a new block of data to the end of the existing append blob.

        Note that the data passed must be replayable if retries are enabled (the default). In other words, the Flux must produce the same data each time it is subscribed to.

        Code Samples

         byte[] md5 = MessageDigest.getInstance("MD5").digest("data".getBytes(StandardCharsets.UTF_8));
 AppendBlobRequestConditions requestConditions = new AppendBlobRequestConditions()
     .setAppendPosition(POSITION)
     .setMaxSize(maxSize);

 client.appendBlockWithResponse(data, length, md5, requestConditions).subscribe(response ->
     System.out.printf("AppendBlob has %d committed blocks%n", response.getValue().getBlobCommittedBlockCount()));
        Parameters:
        data - The data to write to the blob. Note that this Flux must be replayable if retries are enabled (the default). In other words, the Flux must produce the same data each time it is subscribed to.
        length - The exact length of the data. It is important that this value match precisely the length of the data emitted by the Flux.
        contentMd5 - An MD5 hash of the block content. This hash is used to verify the integrity of the block during transport. When this header is specified, the storage service compares the hash of the content that has arrived with this header value. Note that this MD5 hash is not stored with the blob. If the two hashes do not match, the operation will fail.
        appendBlobRequestConditions - AppendBlobRequestConditions
        Returns:
        A Mono containing Response whose value contains the append blob operation.

      • appendBlockFromUrl

        public Mono<AppendBlobItem> appendBlockFromUrl​(String sourceUrl,
                                               BlobRange sourceRange)
        Commits a new block of data from another blob to the end of this append blob.

        Code Samples

         client.appendBlockFromUrl(sourceUrl, new BlobRange(offset, count)).subscribe(response ->
     System.out.printf("AppendBlob has %d committed blocks%n", response.getBlobCommittedBlockCount()));
        Parameters:
        sourceUrl - The url to the blob that will be the source of the copy. A source blob in the same storage account can be authenticated via Shared Key. However, if the source is a blob in another account, the source blob must either be public or must be authenticated via a shared access signature. If the source blob is public, no authentication is required to perform the operation.
        sourceRange - The source BlobRange to copy.
        Returns:
        Mono containing the information of the append blob operation.

      • appendBlockFromUrlWithResponse

        public Mono<com.azure.core.http.rest.Response<AppendBlobItem>> appendBlockFromUrlWithResponse​(String sourceUrl,
                                                                                              BlobRange sourceRange,
                                                                                              byte[] sourceContentMD5,
                                                                                              AppendBlobRequestConditions destRequestConditions,
                                                                                              BlobRequestConditions sourceRequestConditions)
        Commits a new block of data from another blob to the end of this append blob.

        Code Samples

         AppendBlobRequestConditions appendBlobRequestConditions = new AppendBlobRequestConditions()
     .setAppendPosition(POSITION)
     .setMaxSize(maxSize);

 BlobRequestConditions modifiedRequestConditions = new BlobRequestConditions()
     .setIfUnmodifiedSince(OffsetDateTime.now().minusDays(3));

 client.appendBlockFromUrlWithResponse(sourceUrl, new BlobRange(offset, count), null,
     appendBlobRequestConditions, modifiedRequestConditions).subscribe(response ->
     System.out.printf("AppendBlob has %d committed blocks%n", response.getValue().getBlobCommittedBlockCount()));
        Parameters:
        sourceUrl - The url to the blob that will be the source of the copy. A source blob in the same storage account can be authenticated via Shared Key. However, if the source is a blob in another account, the source blob must either be public or must be authenticated via a shared access signature. If the source blob is public, no authentication is required to perform the operation.
        sourceRange - BlobRange
        sourceContentMD5 - An MD5 hash of the block content from the source blob. If specified, the service will calculate the MD5 of the received data and fail the request if it does not match the provided MD5.
        destRequestConditions - AppendBlobRequestConditions
        sourceRequestConditions - BlobRequestConditions
        Returns:
        A Mono containing Response whose value contains the append blob operation.

      • appendBlockFromUrlWithResponse

        public Mono<com.azure.core.http.rest.Response<AppendBlobItem>> appendBlockFromUrlWithResponse​(AppendBlobAppendBlockFromUrlOptions options)
        Commits a new block of data from another blob to the end of this append blob.

        Code Samples

         AppendBlobRequestConditions appendBlobRequestConditions = new AppendBlobRequestConditions()
     .setAppendPosition(POSITION)
     .setMaxSize(maxSize);

 BlobRequestConditions modifiedRequestConditions = new BlobRequestConditions()
     .setIfUnmodifiedSince(OffsetDateTime.now().minusDays(3));

 client.appendBlockFromUrlWithResponse(new AppendBlobAppendBlockFromUrlOptions(sourceUrl)
     .setSourceRange(new BlobRange(offset, count))
     .setDestinationRequestConditions(appendBlobRequestConditions)
     .setSourceRequestConditions(modifiedRequestConditions)).subscribe(response ->
     System.out.printf("AppendBlob has %d committed blocks%n", response.getValue().getBlobCommittedBlockCount()));
        Parameters:
        options - Parameters for the operation.
        Returns:
        A Mono containing Response whose value contains the append blob operation.

      • seal

        public Mono<Void> seal()
        Seals an append blob, making it read only. Any subsequent appends will fail.

        Code Samples

         client.seal().subscribe(response -> System.out.println("Sealed AppendBlob"));
        Returns:
        A reactive response signalling completion.

      • sealWithResponse

        public Mono<com.azure.core.http.rest.Response<Void>> sealWithResponse​(AppendBlobSealOptions options)
        Seals an append blob, making it read only. Any subsequent appends will fail.

        Code Samples

         AppendBlobRequestConditions requestConditions = new AppendBlobRequestConditions().setLeaseId(leaseId)
     .setIfUnmodifiedSince(OffsetDateTime.now().minusDays(3));

 client.sealWithResponse(new AppendBlobSealOptions().setRequestConditions(requestConditions))
     .subscribe(response -> System.out.println("Sealed AppendBlob"));
        Parameters:
        options - AppendBlobSealOptions
        Returns:
        A reactive response signalling completion.