flush

问题 A bit of background: I am using pyramid framework with SQLAlchemy . My db session is handled by pyramid_tm and ZTE DBSession = scoped_session(sessionmaker(extension=ZopeTransactionExtension())) I have a very complicated database design with lots of model classes, foreign keys, and complex relationships between my models. So while doing some very complicated logic on my Models and deleting, updating , inserting, and moving around objects from relationships in different models I used to get

问题 In the spring security generated class UserRole or SecUserSecRole (you could call it whatever you choose) there is a command to make a new UserRole() and save it with .save(flush:flush, insert:true) What does that mean? What is it doing differently from .save(flush:true)? 回答1: From the Grails docs: insert (optional) - When set to true will force Hibernate to do a SQL INSERT, this is useful in certain situations when legacy databases (such as AS/400) are involved and Hibernate cannot detect

问题 This has been bugging me for the last couple days, because it used to work. I upgraded my intellij and now it doesn't work. I don't want to go back, but I need an answer. So, I'm writing a console application, and while it runs, I want to have a shell'd out display of progress. It works fine when it's running, but when I'm debugging in IntelliJ Idea, the System.out.flush() won't flush to the console unless the buffer contains a newline. I wrote the following unit test to find out if it was me

问题 I have to save a large number of objects to the database using hibernate. Instead of commiting all of them at once, I would like to commit as soon as n (BATCH_SIZE) objects are present in the session. Session session = getSession(); session.setCacheMode(CacheMode.IGNORE); for(int i=0;i<objects.length;i++){ session.save(objects[i]); if( (i+1) % BATCH_SIZE == 0){ session.flush(); session.clear(); } } I would have tried something like above, but I read that session.flush() does not commit the

问题 I have a Server and Client in my little demo program, where I send some string data from the Client to the Server, and after that resending this data for the Client, which also writes it out to the console. I was confused by PrtintWriter's flush method, which is - according to the JAVA documentation, - flushes the stream. After some researching I'm getting familiar with the concept of autoflash: when the autoFlash parameter is true println, printf, or format methods will flush the output

问题 I'm working on a network app written in Java, using ObjectOutputStream and ObjectInputStream on top of Sockets to exchange messages. My code looks like this: Sender: ObjectOutputStream out; ObjectInputStream in; try{ Socket socket=new Socket(address, port); socket.setSoLinger(true, socketLingerTime); out=new ObjectOutputStream(socket.getOutputStream()); out.writeObject(message); out.flush(); out.close(); }catch (variousExceptions)... Receiver: Object incoming; try{ incoming

问题 I'd like to add a cookie to an HttpServletResponse after its content (usually HTML) has been rendered. As mentioned here (http://osdir.com/ml/java.jasig.uportal/2005-10/msg00276.html), and here (Adding a cookie to the response in Java after the header has been flushed?), this is possible by buffering up the response so it won't get flushed and sent to client (since after headers are sent to client, response is committed, and no more headers, namely cookie headers, can be sent to client).

问题 This question: How to protect log from application crash? has lead me to another - what does std::ofstream::close() actually do? I know it calls flush() and that's one thing. But what else? What closing the file actually is? Edit: Let me rephrase my question - is anything physically done to the actual file during the call to close() or is it just std::ofstream internal cleanup stuff? 回答1: Other than flushing the userspace buffers, i.e. flush() , close(2) is called on the underlying file

问题 I read this question and other questions related to this but did not get any direct answer. I need to send data to the client immediately for performance issue. I don't need Nagle's algorithm to efficiently send data. Socket sock = new Socket("localhost", 1234); sock.setTcpNoDelay​(); OutputStream output = sock.getOutputStream(); for(int i = 0; i < 100; i++){ output.write(dataByteArray); output.flush(); Thread.sleep(delayTime); } My question is: as I have set sock.setTcpNoDelay​() do I really

问题 Hello I'm having an issue with an NSOutputStream in Objective C. I've got a server running up on my computer and the iPhone emulator sends data to the server and the server should send it back. The only issue is, when I send it, It's not sending the text until I exit out of the Emulator, and only then does the server get the information. NSString* toSend = chatField.text; NSData* sendData = [[NSData alloc] initWithData:[toSend dataUsingEncoding:NSASCIIStringEncoding]]; [outStream write: