/**
* Demonstrates use of BinaryDocumentManager. Use BinaryDocumentManager for insert or update of
* binary documents.
*/
public static void writeBinaryContent(DatabaseClient client) throws IOException {
// create manager for Binary Documents
BinaryDocumentManager docMgr = client.newBinaryDocumentManager();
// create an identifier for the document
String docId = "/binary/mlfavicon-1.png";
// define mimetype
String mimetype = "image/png";
// write content to the database
docMgr.write(
docId,
new FileHandle()
.with(
new File(
StreamReadWrite.class
.getProtectionDomain()
.getCodeSource()
.getLocation()
.getPath()
+ File.separator
+ "data"
+ File.separator
+ "mlfavicon.png"))
.withMimetype(mimetype));
System.out.println("writeBinaryContent() - Wrote " + docId + " content. \n");
}
/** Demonstrates BytesHandle to buffer binary content */
public static void readBinaryBuffer(DatabaseClient client) throws IOException {
// create manager for Binary Documents
BinaryDocumentManager docMgr = client.newBinaryDocumentManager();
// create an identifier for the document
String docId = "/binary/mlfavicon-2.png";
InputStream docStream = docMgr.read(docId, new InputStreamHandle()).get();
if (docStream == null) throw new IOException("Could not read document example");
// create a handle to receive the document content
BytesHandle readHandle = new BytesHandle();
// read the document content
docMgr.read(docId, readHandle);
// to read part of the content
// docMgr.read(docId, readHandle,9,10);
// access the document content
byte[] buf = readHandle.get();
// ... do something with the document content ...
System.out.println("\nRead " + docId + " with buffer having length: " + buf.length);
}
/**
* Demonstrates how to write content to a document using an OutputStream. You provide the content
* during execution of the write operation instead of when starting the write operation.
*/
public static void readWriteBinaryStream(DatabaseClient client) throws IOException {
BinaryDocumentManager docMgr = client.newBinaryDocumentManager();
final int MAX_BUF = 8192;
final String FILENAME = "mlfavicon.png";
// String docIdToRead = "/binary/mlfavicon.png";
String docIdToRead = "data" + File.separator + FILENAME;
String docIdToWrite = "/binary/mlfavicon-2.png";
// create an anonymous class with a callback method
OutputStreamSender sender =
new OutputStreamSender() {
// the callback receives the output stream
public void write(OutputStream out) throws IOException {
// acquire the content from the database
/* InputStream docStream =
docMgr.read(docIdToRead, new InputStreamHandle()).get();
if (docStream == null)
throw new IOException("Could not read document example");
*/
// acquire the content from the file system
InputStream docStream = Util.openStream(docIdToRead);
if (docStream == null) throw new IOException("Could not read document example");
// copy content to the output stream
byte[] buf = new byte[MAX_BUF];
int byteCount = 0;
while ((byteCount = docStream.read(buf)) != -1) {
out.write(buf, 0, byteCount);
}
}
};
// create a handle for writing the content
OutputStreamHandle handle = new OutputStreamHandle(sender);
// write the document content
docMgr.write(docIdToWrite, handle);
System.out.println(
"readWriteBinaryStream() - \n"
+ "Read "
+ docIdToRead
+ " content. \n"
+ "Wrote "
+ docIdToWrite
+ " content. \n");
}
