Package org.apache.ignite.internal.processors.odbc

Class ClientListenerNioMessageParser

java.lang.Object

org.apache.ignite.internal.processors.odbc.ClientListenerNioMessageParser

All Implemented Interfaces:

GridNioParser

public class ClientListenerNioMessageParser
extends Object
implements GridNioParser

This class implements stream parser.

The rule for this parser is that every message sent over the stream is prepended with 4-byte integer header containing message size. So, the stream structure is as follows:

     +--+--+--+--+--+--+...+--+--+--+--+--+--+--+...+--+
     | MSG_SIZE  |   MESSAGE  | MSG_SIZE  |   MESSAGE  |
     +--+--+--+--+--+--+...+--+--+--+--+--+--+--+...+--+
 

Constructor Summary

Constructors

Constructor	Description
ClientListenerNioMessageParser(IgniteLogger log)

Method Summary

Modifier and Type	Method	Description
Object	decode(GridNioSession ses, ByteBuffer buf)	This method is called when input bytes are available on the underlying network connection.
ByteBuffer	encode(GridNioSession ses, Object msg)	This method is called whenever a message should be sent to the network connection and network buffer is ready to be filled with bytes.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ClientListenerNioMessageParser

public ClientListenerNioMessageParser(IgniteLogger log)

Method Detail

decode

public Object decode(GridNioSession ses,
                     ByteBuffer buf)
              throws IOException,
                     IgniteCheckedException

This method is called when input bytes are available on the underlying network connection.

Method must read given buffer until either it reaches the end of buffer or a valid user message is encountered. In this case it must return parsed message.

Specified by:

decode in interface GridNioParser

Parameters:

ses - Session on which bytes are read.

buf - Buffer that contains input data.

Returns:

Parsed user message or null if complete message has not been received yet. Note that in case of returning null given buffer must be completely read.

Throws:

IOException - If exception occurred while reading data.

IgniteCheckedException - If any user-specific error occurred.

encode

public ByteBuffer encode(GridNioSession ses,
                         Object msg)
                  throws IOException,
                         IgniteCheckedException

This method is called whenever a message should be sent to the network connection and network buffer is ready to be filled with bytes.

Method must encode the complete message and return byte buffer from which data should be read.

Specified by:

encode in interface GridNioParser

Parameters:

ses - Session on which message is being sent.

msg - Message to encode.

Returns:

Buffer containing encoded message.

Throws:

IOException - If exception occurred while encoding data.

IgniteCheckedException - If any user-specific error occurred while encoding data.

toString

public String toString()

Overrides:

toString in class Object