public BlobDataSource read(final URI uri) throws IOException {
// check if blob was stored for the message
Assert.notNull(uri, "URI cannot be null");
BlobDataSource blobDS;
BlobURI blobUri = new BlobURI().fromURI(uri);
if (blobUri.getProfile().equals(DatabaseConstants.DATABASE_PROFILE)) {
blobDS = dbBlobStorage.read(uri);
} else {
blobDS = cloudBlobStorage.read(uri);
}
// if compressed, add compression handler to data source
if ((blobUri.getCompression() != null
&& blobUri.getCompression().equals(DeflateCompressionHandler.COMPRESSION_TYPE_DEFLATE))
||
// TODO: deprecated suffix based compression detection
// kept for backward compatibility with 0.3
blobUri.getName().endsWith(BlobStoreConstants.COMPRESS_SUFFIX)) {
CompressionHandler ch = new DeflateCompressionHandler();
return new BlobDataSource(uri, blobDS.getInputStream(), ch);
} else {
return blobDS;
}
}
public void delete(final URI uri) throws IOException {
// check if blob was stored for the message, silently skip otherwise
if (uri == null) {
return;
}
boolean isDbProfile =
new BlobURI().fromURI(uri).getProfile().equals(DatabaseConstants.DATABASE_PROFILE);
if (isDbProfile) {
dbBlobStorage.delete(uri);
} else {
cloudBlobStorage.delete(uri);
}
}
public BlobURI write(
final UUID messageId,
final Mailbox mailbox,
final String profileName,
final InputStream in,
final Long size)
throws IOException, GeneralSecurityException {
Assert.notNull(in, "No data to store");
BlobURI blobUri;
InputStream in1;
Long updatedSize = size;
boolean compressed = false;
// compress stream and calculate compressed size
if ((compressionHandler != null) && (size > MIN_COMPRESS_SIZE)) {
InputStream compressedInputStream = compressionHandler.compress(in);
FileBackedOutputStream fbout = new FileBackedOutputStream(MAX_MEMORY_FILE_SIZE, true);
updatedSize = ByteStreams.copy(compressedInputStream, fbout);
in1 = fbout.getSupplier().getInput();
compressed = true;
} else {
in1 = in;
}
if (updatedSize <= Configurator.getDatabaseBlobMaxSize()) {
logger.debug(
"Storing Blob in the database because size ({}KB) was less than database threshold {}KB",
updatedSize,
Configurator.getDatabaseBlobMaxSize());
blobUri = dbBlobStorage.write(messageId, mailbox, null, in1, updatedSize);
} else {
logger.debug(
"Storing Blob in the cloud because size ({}KB) was greater than database threshold {}KB",
updatedSize,
Configurator.getDatabaseBlobMaxSize());
blobUri =
cloudBlobStorage.write(
messageId, mailbox, Configurator.getBlobStoreWriteProfileName(), in1, updatedSize);
}
// add compression information to the blob URI
if (compressed) {
blobUri.setCompression(compressionHandler.getType());
}
return blobUri;
}
