book

TCP/IP Sockets in Java, 2nd Edition

by Kenneth L. Calvert, Michael J. Donahoo

August 2011

Intermediate to advanced

192 pages

4h 46m

English

Morgan Kaufmann

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Dedication
Intended AudienceApproachWhat This Book Is NotAcknowledgmentsFeedback
1.1. Networks, Packets, and Protocols1.2. About Addresses1.3. About Names1.4. Clients and Servers1.5. What Is a Socket?1.6. Exercises
2.1. Socket Addresses2.2. TCP Sockets2.2.1. TCP Client2.2.2. TCP Server2.2.3. Input and Output Streams2.3. UDP Sockets2.3.1. DatagramPacket2.3.2. UDP Client2.3.3. UDP Server2.3.4. Sending and Receiving with UDP Sockets2.4. Exercises
3.1. Encoding Information3.1.1. Primitive Integers3.1.2. Strings and Text3.1.3. Bit-Diddling: Encoding Booleans3.2. Composing I/O Streams3.3. Framing and Parsing3.4. Java-Specific Encodings3.5. Constructing and Parsing Protocol Messages3.5.1. Text-Based Representation3.5.2. Binary Representation3.5.3. Sending and Receiving3.6. Wrapping Up3.7. Exercises
4.1. Multitasking4.1.1. Java Threads4.1.2. Server Protocol4.1.3. Thread-per-Client4.1.4. Thread Pool4.1.5. System-Managed Dispatching: The Executor Interface4.2. Blocking and Timeouts4.2.1. accept(), read(), and receive()4.2.2. Connecting and Writing4.2.3. Limiting Per-Client Time4.3. Multiple Recipients4.3.1. Broadcast4.3.2. Multicast4.4. Controlling Default Behaviors4.4.1. Keep-Alive4.4.2. Send and Receive Buffer Size4.4.3. Timeout4.4.4. Address Reuse4.4.5. Eliminating Buffering Delay4.4.6. Urgent Data4.4.7. Lingering after close4.4.8. Broadcast Permission4.4.9. Traffic Class4.4.10. Performance-Based Protocol Selection4.5. Closing Connections4.6. Applets4.7. Wrapping Up4.8. Exercises
5.1. Why Do We Need This?5.2. Using Channels with Buffers5.3. Selectors5.4. Buffers in Detail5.4.1. Buffer Indices5.4.2. Buffer Creation5.4.3. Storing and Retrieving Data5.4.4. Preparing Buffers: clear(), flip(), and rewind()5.4.5. Compacting Data in a Buffer5.4.6. Buffer Perspectives: duplicate(), slice(), etc.5.4.7. Character Coding5.5. Stream (TCP) Channels in Detail5.6. Selectors in Detail5.6.1. Registering Interest in Channels5.6.2. Selecting and Identifying Ready Channels5.6.3. Channel Attachments5.6.4. Selectors in a Nutshell5.7. Datagram (UDP) Channels5.8. Exercises
6.1. Buffering and TCP6.2. Deadlock Danger6.3. Performance Implications6.4. TCP Socket Life Cycle6.4.1. Connecting6.4.2. Closing a TCP Connection6.5. Demultiplexing Demystified6.6. Exercises

Content preview from TCP/IP Sockets in Java, 2nd Edition

Chapter 5. NIO

This chapter introduces the main facilities of the “New I/O” packages. There are two important parts: the java.nio.channels package, which introduces the Selector and Channel abstractions, and the java.nio package, which introduces the Buffer abstraction. These are fairly advanced features, with a number of subtle details related to their usage. Therefore this chapter is organized a little differently than the earlier ones. In the first subsection we’ll motivate the NIO features by describing some problems that they are intended to solve—specifically, challenges that arise in building high-performance servers without them. (If you don’t care about the “why?” question, feel free to skip this section.) In Section 5.2, we present (as ...