biouml.modules.genenet.access
Class MGL_Connection

Direct Known Subclasses:

MGL_Connection_Client

public class MGL_Connection

MGL Connection is the core of MGL client & server. General scheme of MGL client & server work.

Client                          Server
---------------------           -------------------------------
[1.]  opens the session

2.   opens the connection     ->     opens the connection

3.   sends the command        ->     receives the command and calls
corresponding function

[4.]  sends the command        ->     the function receives parameters
parameters

5.   recieves answer state    <-     the function or server sends
( ok / error )                  answer state ( ok / error )

6.   receives the answer      <-     the functions sends the answer

7.   closes the connection
if the session
- is not opened      ->     closes the connection
- is opened

[8.]  close the session         ->    closes the connection

Version: 2.4.6, 27 March 2000

public final static int ACCELERATOR

public final static int DB_DEFAULT_FIELDS

See Also:

MGL_ConnectionClient#getDefaultFieldsDescription, MGL_ConnectionServer#sendDefaultFieldsDescription

public final static int DB_DESCRIPTION

See Also:

MGL_ConnectionClient#getDatabaseDescription, MGL_ConnectionServer#sendDatabaseDescription

public final static int DB_ENTRIES_SET_BY_AC

See Also:

MGL_ConnectionClient#getEntriesSetByAC, MGL_ConnectionServer#sendEntriesSet

public final static int DB_ENTRIES_SET_BY_ID

See Also:

MGL_ConnectionClient#getEntriesSetByID, MGL_ConnectionServer#sendEntriesSet

public final static int DB_ENTRY_BY_AC

See Also:

MGL_ConnectionClient#getEntryByAC, MGL_ConnectionServer#sendEntry

public final static int DB_ENTRY_BY_ID

See Also:

MGL_ConnectionClient#getEntryByID, MGL_ConnectionServer#sendEntry

public final static int DB_ENTRY_VERSIONS

See Also:

MGL_ConnectionClient#getEntryVersions, MGL_ConnectionServer#sendEntryVersions

public final static int DB_EXECUTE_QUERY

See Also:

MGL_ConnectionClient#executeQuery, MGL_ConnectionServer#executeQuery

public final static int DB_GENENET_DESCRIPTION

See Also:

MGL_ConnectionClient#getGeneNetDescription, MGL_ConnectionServer#sendGeneNetDescription

public final static int DB_GENENET_LIST_ID

See Also:

MGL_ConnectionClient#getGeneNetListID, MGL_ConnectionServer#sendGeneNetListID

public final static int DB_GENENET_SCHEME

See Also:

MGL_ConnectionClient#getGeneNetScheme, MGL_ConnectionServer#sendGeneNetScheme

public final static int DB_LIST

See Also:

MGL_ConnectionClient#getDatabaseList, MGL_ConnectionServer#sendDatabaseList

public final static int DB_LIST_ID

See Also:

MGL_ConnectionClient#getListID, MGL_ConnectionServer#sendListID

public final static int DB_REMOVE_ENTRY

See Also:

MGL_ConnectionClient#removeEntry, MGL_ConnectionServer#removewEntry

public final static int DB_SET

See Also:

MGL_ConnectionClient#setDatabase, MGL_ConnectionServer#setDatabase

public final static int DB_SIZE

See Also:

MGL_ConnectionClient#getSize, MGL_ConnectionServer#sendSize

public final static int DB_WRITE_ENTRIES_SET

See Also:

MGL_ConnectionClient#writeEntrySet, MGL_ConnectionServer#writeEntrySet

public final static int DB_WRITE_ENTRY

See Also:

MGL_ConnectionClient#writeEntry, MGL_ConnectionServer#writeEntry

public final static int DISCONNECT

See Also:

MGL_ConnectionClient#disconnect, MGL_ConnectionServer#disconnect

public final static int ERROR

See Also:

MGL_ConnectionServer#error

public final static int OK

The OK (all correct message).

public final static synchronized String readStringUTF(InputStream inputstream)
                                                throws java.io.IOException

Reads in a string from the specified data input stream. The string has been encoded using a modified UTF-8 format.

The first two bytes are read as if by readInt. This value gives the number of following bytes that are in the encoded string, not the length of the resulting string. The following bytes are then interpreted as bytes encoding characters in the UTF-8 format and are converted into characters.

This method blocks until all the bytes are read, the end of the stream is detected, or an exception is thrown.

Parameters:

in - a input stream.

Returns: a Unicode string.

Throws:

EOFException - if the input stream reaches the end before all the bytes.

IOException - if an I/O error occurs.

UTFDataFormatException - if the bytes do not represent a valid UTF-8 encoding of a Unicode string.

See Also:

java.io.DataInputStream.readUnsignedShort()

public final static synchronized void writeStringUTF(OutputStream outputstream, String s)
                                               throws java.io.IOException

Writes a string to the underlying output stream using UTF-8 encoding in a machine-independent manner.

First, 4 bytes are written to the output stream as if by the writeInt method giving the number of bytes to follow. This value is the number of bytes actually written out, not the length of the string. Following the length, each character of the string is output, in sequence, using the UTF-8 encoding for the character.

Parameters:

out - OutputStream.

str - string to be written.

Throws:

IOException - if an I/O error occurs.

Association Links

to Class java.net.Socket

Socket for connection.

to Class java.io.DataInputStream

Socket input stream.

to Class java.io.DataOutputStream

Socket output stream.