A BytesMessage object is used to send a message containing a stream of unsigned bytes. More...

#include <src/main/cms/BytesMessage.h>

Inheritance diagram for cms::BytesMessage:

Public Member Functions
virtual	~BytesMessage () throw ()
virtual void	setBodyBytes (const unsigned char *buffer, int numBytes)=0
	sets the bytes given to the message body.
virtual unsigned char *	getBodyBytes () const =0
	Gets the bytes that are contained in this message and returns them in a newly allocated array that becomes the property of the caller.
virtual int	getBodyLength () const =0
	Returns the number of bytes contained in the body of this message.
virtual void	reset ()=0
	Puts the message body in read-only mode and repositions the stream of bytes to the beginning.
virtual bool	readBoolean () const =0
	Reads a Boolean from the Bytes message stream.
virtual void	writeBoolean (bool value)=0
	Writes a boolean to the bytes message stream as a 1-byte value.
virtual unsigned char	readByte () const =0
	Reads a Byte from the Bytes message stream.
virtual void	writeByte (unsigned char value)=0
	Writes a byte to the bytes message stream as a 1-byte value.
virtual int	readBytes (std::vector< unsigned char > &value) const =0
	Reads a byte array from the bytes message stream.
virtual void	writeBytes (const std::vector< unsigned char > &value)=0
	Writes a byte array to the bytes message stream using the vector size as the number of bytes to write.
virtual int	readBytes (unsigned char *buffer, int length) const =0
	Reads a portion of the bytes message stream.
virtual void	writeBytes (const unsigned char *value, int offset, int length)=0
	Writes a portion of a byte array to the bytes message stream.
virtual char	readChar () const =0
	Reads a Char from the Bytes message stream.
virtual void	writeChar (char value)=0
	Writes a char to the bytes message stream as a 1-byte value.
virtual float	readFloat () const =0
	Reads a 32 bit float from the Bytes message stream.
virtual void	writeFloat (float value)=0
	Writes a float to the bytes message stream as a 4 byte value.
virtual double	readDouble () const =0
	Reads a 64 bit double from the Bytes message stream.
virtual void	writeDouble (double value)=0
	Writes a double to the bytes message stream as a 8 byte value.
virtual short	readShort () const =0
	Reads a 16 bit signed short from the Bytes message stream.
virtual void	writeShort (short value)=0
	Writes a signed short to the bytes message stream as a 2 byte value.
virtual unsigned short	readUnsignedShort () const =0
	Reads a 16 bit unsigned short from the Bytes message stream.
virtual void	writeUnsignedShort (unsigned short value)=0
	Writes a unsigned short to the bytes message stream as a 2 byte value.
virtual int	readInt () const =0
	Reads a 32 bit signed integer from the Bytes message stream.
virtual void	writeInt (int value)=0
	Writes a signed int to the bytes message stream as a 4 byte value.
virtual long long	readLong () const =0
	Reads a 64 bit long from the Bytes message stream.
virtual void	writeLong (long long value)=0
	Writes a long long to the bytes message stream as a 8 byte value.
virtual std::string	readString () const =0
	Reads an ASCII String from the Bytes message stream.
virtual void	writeString (const std::string &value)=0
	Writes an ASCII String to the Bytes message stream.
virtual std::string	readUTF () const =0
	Reads an UTF String from the BytesMessage stream.
virtual void	writeUTF (const std::string &value)=0
	Writes an UTF String to the BytesMessage stream.
virtual BytesMessage *	clone () const =0
	Clones this message.

Detailed Description

A BytesMessage object is used to send a message containing a stream of unsigned bytes.

It inherits from the Message interface and adds a bytes message body. The receiver of the message supplies the interpretation of the bytes using the methods added by the BytesMessage interface.

The BytesMessage methods are based largely on those found in decaf.io.DataInputStream and decaf.io.DataOutputStream.

Although the CMS API allows the use of message properties with byte messages, they are typically not used, since the inclusion of properties may affect the format.

The primitive types can be written explicitly using methods for each type. Because the C++ language is more limited when dealing with primitive types the JMS equivalent generic read and write methods that take Java objects cannot be provided in the CMS API.

When the message is first created, and when clearBody is called, the body of the message is in write-only mode. After the first call to reset has been made, the message body is in read-only mode. After a message has been sent, the client that sent it can retain and modify it without affecting the message that has been sent. The same message object can be sent multiple times. When a message has been received, the provider has called reset so that the message body is in read-only mode for the client.

If clearBody is called on a message in read-only mode, the message body is cleared and the message is in write-only mode.

If a client attempts to read a message in write-only mode, a MessageNotReadableException is thrown.

If a client attempts to write a message in read-only mode, a MessageNotWriteableException is thrown.

Since:: 1.0

Constructor & Destructor Documentation

virtual cms::BytesMessage::~BytesMessage ( ) throw () [virtual]

Member Function Documentation

virtual BytesMessage* cms::BytesMessage::clone ( ) const [pure virtual]

Clones this message.

Returns:: a deep copy of this message.

Exceptions:

CMSException - if an internal error occurs while cloning the Message.

Implements cms::Message.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual unsigned char* cms::BytesMessage::getBodyBytes ( ) const [pure virtual]

Gets the bytes that are contained in this message and returns them in a newly allocated array that becomes the property of the caller.

This is a copy of the data contained in this message, changing the value contained in this array has no effect on the data contained in this message.

Returns:: pointer to a byte buffer that the call owns upon completion of this method.

Exceptions:

CMSException	- If an internal error occurs.
MessageNotReadableException	- If the message is in Write Only Mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual int cms::BytesMessage::getBodyLength ( ) const [pure virtual]

Returns the number of bytes contained in the body of this message.

Returns:: number of bytes.

Exceptions:

CMSException	- If an internal error occurs.
MessageNotReadableException	- If the message is in Write Only Mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual bool cms::BytesMessage::readBoolean ( ) const [pure virtual]

Reads a Boolean from the Bytes message stream.

Returns:: boolean value from stream

Exceptions:

CMSException	- if the CMS provider fails to read the message due to some internal error.
MessageEOFException	- if unexpected end of bytes stream has been reached.
MessageNotReadableException	- if the message is in write-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual unsigned char cms::BytesMessage::readByte ( ) const [pure virtual]

Reads a Byte from the Bytes message stream.

Returns:: unsigned char value from stream

Exceptions:

CMSException	- if the CMS provider fails to read the message due to some internal error.
MessageEOFException	- if unexpected end of bytes stream has been reached.
MessageNotReadableException	- if the message is in write-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual int cms::BytesMessage::readBytes ( std::vector< unsigned char > & value ) const [pure virtual]

Reads a byte array from the bytes message stream.

If the length of vector value is less than the number of bytes remaining to be read from the stream, the vector should be filled. A subsequent call reads the next increment, and so on.

If the number of bytes remaining in the stream is less than the length of vector value, the bytes should be read into the vector. The return value of the total number of bytes read will be less than the length of the vector, indicating that there are no more bytes left to be read from the stream. The next read of the stream returns -1.

Parameters:

value buffer to place data in

Returns:: the total number of bytes read into the buffer, or -1 if there is no more data because the end of the stream has been reached

Exceptions:

CMSException	- if the CMS provider fails to read the message due to some internal error.
MessageEOFException	- if unexpected end of bytes stream has been reached.
MessageNotReadableException	- if the message is in write-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual int cms::BytesMessage::readBytes	(	unsigned char *	buffer,
		int	length
	)		const `[pure virtual]`

Reads a portion of the bytes message stream.

If the length of array value is less than the number of bytes remaining to be read from the stream, the array should be filled. A subsequent call reads the next increment, and so on.

If the number of bytes remaining in the stream is less than the length of array value, the bytes should be read into the array. The return value of the total number of bytes read will be less than the length of the array, indicating that there are no more bytes left to be read from the stream. The next read of the stream returns -1.

If length is negative, or length is greater than the length of the array value, then an IndexOutOfBoundsException is thrown. No bytes will be read from the stream for this exception case.

Parameters:

buffer	the buffer into which the data is read
length	the number of bytes to read; must be less than or equal to value.length

Returns:: the total number of bytes read into the buffer, or -1 if there is no more data because the end of the stream has been reached

Exceptions:

CMSException	- if the CMS provider fails to read the message due to some internal error.
MessageEOFException	- if unexpected end of bytes stream has been reached.
MessageNotReadableException	- if the message is in write-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual char cms::BytesMessage::readChar ( ) const [pure virtual]

Reads a Char from the Bytes message stream.

Returns:: char value from stream

Exceptions:

CMSException	- if the CMS provider fails to read the message due to some internal error.
MessageEOFException	- if unexpected end of bytes stream has been reached.
MessageNotReadableException	- if the message is in write-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual double cms::BytesMessage::readDouble ( ) const [pure virtual]

Reads a 64 bit double from the Bytes message stream.

Returns:: double value from stream

Exceptions:

CMSException	- if the CMS provider fails to read the message due to some internal error.
MessageEOFException	- if unexpected end of bytes stream has been reached.
MessageNotReadableException	- if the message is in write-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual float cms::BytesMessage::readFloat ( ) const [pure virtual]

Reads a 32 bit float from the Bytes message stream.

Returns:: double value from stream

Exceptions:

CMSException	- if the CMS provider fails to read the message due to some internal error.
MessageEOFException	- if unexpected end of bytes stream has been reached.
MessageNotReadableException	- if the message is in write-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual int cms::BytesMessage::readInt ( ) const [pure virtual]

Reads a 32 bit signed integer from the Bytes message stream.

Returns:: int value from stream

Exceptions:

CMSException	- if the CMS provider fails to read the message due to some internal error.
MessageEOFException	- if unexpected end of bytes stream has been reached.
MessageNotReadableException	- if the message is in write-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual long long cms::BytesMessage::readLong ( ) const [pure virtual]

Reads a 64 bit long from the Bytes message stream.

Returns:: long long value from stream

Exceptions:

CMSException	- if the CMS provider fails to read the message due to some internal error.
MessageEOFException	- if unexpected end of bytes stream has been reached.
MessageNotReadableException	- if the message is in write-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual short cms::BytesMessage::readShort ( ) const [pure virtual]

Reads a 16 bit signed short from the Bytes message stream.

Returns:: short value from stream

Exceptions:

CMSException	- if the CMS provider fails to read the message due to some internal error.
MessageEOFException	- if unexpected end of bytes stream has been reached.
MessageNotReadableException	- if the message is in write-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual std::string cms::BytesMessage::readString ( ) const [pure virtual]

Reads an ASCII String from the Bytes message stream.

Returns:: String from stream

Exceptions:

CMSException	- if the CMS provider fails to read the message due to some internal error.
MessageEOFException	- if unexpected end of bytes stream has been reached.
MessageNotReadableException	- if the message is in write-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual unsigned short cms::BytesMessage::readUnsignedShort ( ) const [pure virtual]

Reads a 16 bit unsigned short from the Bytes message stream.

Returns:: unsigned short value from stream

Exceptions:

CMSException	- if the CMS provider fails to read the message due to some internal error.
MessageEOFException	- if unexpected end of bytes stream has been reached.
MessageNotReadableException	- if the message is in write-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual std::string cms::BytesMessage::readUTF ( ) const [pure virtual]

Reads an UTF String from the BytesMessage stream.

Returns:: String from stream

Exceptions:

CMSException	- if the CMS provider fails to read the message due to some internal error.
MessageEOFException	- if unexpected end of bytes stream has been reached.
MessageNotReadableException	- if the message is in write-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual void cms::BytesMessage::reset ( ) [pure virtual]

Puts the message body in read-only mode and repositions the stream of bytes to the beginning.

Exceptions:

CMSException	- If the provider fails to perform the reset operation.
MessageFormatException	- If the Message has an invalid format.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual void cms::BytesMessage::setBodyBytes	(	const unsigned char *	buffer,
		int	numBytes
	)		`[pure virtual]`

sets the bytes given to the message body.

Parameters:

buffer	Byte Buffer to copy
numBytes	Number of bytes in Buffer to copy

Exceptions:

CMSException	- If an internal error occurs.
MessageNotWriteableException	- if in Read Only Mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual void cms::BytesMessage::writeBoolean ( bool value ) [pure virtual]

Writes a boolean to the bytes message stream as a 1-byte value.

The value true is written as the value (byte)1; the value false is written as the value (byte)0.

Parameters:

value boolean to write to the stream

Exceptions:

CMSException	- if the CMS provider fails to write the message due to some internal error.
MessageNotWriteableException	- if the message is in read-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual void cms::BytesMessage::writeByte ( unsigned char value ) [pure virtual]

Writes a byte to the bytes message stream as a 1-byte value.

Parameters:

value byte to write to the stream

Exceptions:

CMSException	- if the CMS provider fails to write the message due to some internal error.
MessageNotWriteableException	- if the message is in read-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual void cms::BytesMessage::writeBytes ( const std::vector< unsigned char > & value ) [pure virtual]

Writes a byte array to the bytes message stream using the vector size as the number of bytes to write.

Parameters:

value bytes to write to the stream

Exceptions:

CMSException	- if the CMS provider fails to write the message due to some internal error.
MessageNotWriteableException	- if the message is in read-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual void cms::BytesMessage::writeBytes	(	const unsigned char *	value,
		int	offset,
		int	length
	)		`[pure virtual]`

Writes a portion of a byte array to the bytes message stream.

size as the number of bytes to write.

Parameters:

value	bytes to write to the stream
offset	the initial offset within the byte array
length	the number of bytes to use

Exceptions:

CMSException	- if the CMS provider fails to write the message due to some internal error.
MessageNotWriteableException	- if the message is in read-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual void cms::BytesMessage::writeChar ( char value ) [pure virtual]

Writes a char to the bytes message stream as a 1-byte value.

Parameters:

value char to write to the stream

Exceptions:

CMSException	- if the CMS provider fails to write the message due to some internal error.
MessageNotWriteableException	- if the message is in read-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual void cms::BytesMessage::writeDouble ( double value ) [pure virtual]

Writes a double to the bytes message stream as a 8 byte value.

Parameters:

value double to write to the stream

Exceptions:

CMSException	- if the CMS provider fails to write the message due to some internal error.
MessageNotWriteableException	- if the message is in read-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual void cms::BytesMessage::writeFloat ( float value ) [pure virtual]

Writes a float to the bytes message stream as a 4 byte value.

Parameters:

value float to write to the stream

Exceptions:

CMSException	- if the CMS provider fails to write the message due to some internal error.
MessageNotWriteableException	- if the message is in read-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual void cms::BytesMessage::writeInt ( int value ) [pure virtual]

Writes a signed int to the bytes message stream as a 4 byte value.

Parameters:

value signed int to write to the stream

Exceptions:

CMSException	- if the CMS provider fails to write the message due to some internal error.
MessageNotWriteableException	- if the message is in read-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual void cms::BytesMessage::writeLong ( long long value ) [pure virtual]

Writes a long long to the bytes message stream as a 8 byte value.

Parameters:

value signed long long to write to the stream

Exceptions:

CMSException	- if the CMS provider fails to write the message due to some internal error.
MessageNotWriteableException	- if the message is in read-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual void cms::BytesMessage::writeShort ( short value ) [pure virtual]

Writes a signed short to the bytes message stream as a 2 byte value.

Parameters:

value signed short to write to the stream

Exceptions:

CMSException	- if the CMS provider fails to write the message due to some internal error.
MessageNotWriteableException	- if the message is in read-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual void cms::BytesMessage::writeString ( const std::string & value ) [pure virtual]

Writes an ASCII String to the Bytes message stream.

Parameters:

value String to write to the stream

Exceptions:

CMSException	- if the CMS provider fails to write the message due to some internal error.
MessageNotWriteableException	- if the message is in read-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual void cms::BytesMessage::writeUnsignedShort ( unsigned short value ) [pure virtual]

Writes a unsigned short to the bytes message stream as a 2 byte value.

Parameters:

value unsigned short to write to the stream

Exceptions:

CMSException	- if the CMS provider fails to write the message due to some internal error.
MessageNotWriteableException	- if the message is in read-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

virtual void cms::BytesMessage::writeUTF ( const std::string & value ) [pure virtual]

Writes an UTF String to the BytesMessage stream.

Parameters:

value String to write to the stream

Exceptions:

CMSException	- if the CMS provider fails to read the message due to some internal error.
MessageNotWriteableException	- if the message is in read-only mode.

Implemented in activemq::commands::ActiveMQBytesMessage.

The documentation for this class was generated from the following file:

src/main/cms/BytesMessage.h

cms::BytesMessage Class Reference

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation