Package com.datastax.oss.pulsar.jms.messages

Class PulsarStreamMessage

java.lang.Object

com.datastax.oss.pulsar.jms.PulsarMessage

com.datastax.oss.pulsar.jms.messages.PulsarStreamMessage

All Implemented Interfaces:

javax.jms.Message, javax.jms.StreamMessage

public final class PulsarStreamMessage
extends PulsarMessage
implements javax.jms.StreamMessage

Field Summary

Fields

Modifier and Type	Field	Description
protected DataInputStream	dataInputStream
protected DataOutputStream	dataOutputStream
protected byte[]	originalMessage
protected int	remainingByteArrayLen
protected ByteArrayOutputStream	stream
protected static final byte	TYPE_BOOLEAN
protected static final byte	TYPE_BYTE
protected static final byte	TYPE_BYTES
protected static final byte	TYPE_CHAR
protected static final byte	TYPE_DOUBLE
protected static final byte	TYPE_FLOAT
protected static final byte	TYPE_INT
protected static final byte	TYPE_LONG
protected static final byte	TYPE_NULL
protected static final byte	TYPE_SHORT
protected static final byte	TYPE_STRING

Fields inherited from class com.datastax.oss.pulsar.jms.PulsarMessage

properties, writable

Fields inherited from interface javax.jms.Message

DEFAULT_DELIVERY_DELAY, DEFAULT_DELIVERY_MODE, DEFAULT_PRIORITY, DEFAULT_TIME_TO_LIVE

Constructor Summary

Constructors

Constructor	Description
PulsarStreamMessage()
PulsarStreamMessage(byte[] payload)

Method Summary

Modifier and Type	Method	Description
protected void	checkType(byte type, byte expected)
void	clearBody()	Clears out the message body.
<T> T	getBody(Class<T> c)
long	getBodyLength()	Gets the number of bytes of the message body when the message is in read-only mode.
boolean	isBodyAssignableTo(Class c)	Returns whether the message body is capable of being assigned to the specified type.
protected String	messageType()
protected void	prepareForSend(org.apache.pulsar.client.api.TypedMessageBuilder<byte[]> producer)
protected int	readArrayLen()
boolean	readBoolean()	Reads a boolean from the stream message.
byte	readByte()	Reads a byte value from the stream message.
int	readBytes(byte[] value)	Reads a byte array field from the stream message into the specified byte[] object (the read buffer).
int	readBytes(byte[] value, int length)	Reads a portion of the bytes message stream.
char	readChar()	Reads a Unicode character value from the stream message.
protected byte	readDataType()
double	readDouble()	Reads a double from the stream message.
float	readFloat()	Reads a float from the stream message.
int	readInt()	Reads a 32-bit integer from the stream message.
long	readLong()	Reads a 64-bit integer from the stream message.
Object	readObject()	Reads an object from the stream message.
short	readShort()	Reads a 16-bit integer from the stream message.
String	readString()	Reads a String from the stream message.
int	readUnsignedByte()	Reads an unsigned 8-bit number from the bytes message stream.
int	readUnsignedShort()	Reads an unsigned 16-bit number from the bytes message stream.
String	readUTF()	Reads a string that has been encoded using a modified UTF-8 format from the bytes message stream.
void	reset()	Puts the message body in read-only mode and repositions the stream to the beginning.
protected void	writeArrayLen(int len)
void	writeBoolean(boolean value)	Writes a boolean to the stream message.
void	writeByte(byte value)	Writes a byte to the stream message.
void	writeBytes(byte[] value)	Writes a byte array field to the stream message.
void	writeBytes(byte[] value, int offset, int length)	Writes a portion of a byte array as a byte array field to the stream message.
void	writeChar(char value)	Writes a char to the stream message.
protected void	writeDataType(byte dataType)
void	writeDouble(double value)	Writes a double to the stream message.
void	writeFloat(float value)	Writes a float to the stream message.
void	writeInt(int value)	Writes an int to the stream message.
void	writeLong(long value)	Writes a long to the stream message.
void	writeObject(Object value)	Writes an object to the stream message.
void	writeShort(short value)	Writes a short to the stream message.
void	writeString(String value)	Writes a String to the stream message.
void	writeUTF(String value)	Writes a string to the bytes message stream using UTF-8 encoding in a machine-independent manner.

Methods inherited from class com.datastax.oss.pulsar.jms.PulsarMessage

acknowledge, acknowledgeInternalInTransaction, applyMessage, checkReadable, checkWritable, checkWritableProperty, clearProperties, getBooleanProperty, getByteProperty, getDoubleProperty, getFloatProperty, getIntProperty, getJMSCorrelationID, getJMSCorrelationIDAsBytes, getJMSDeliveryMode, getJMSDeliveryTime, getJMSDestination, getJMSExpiration, getJMSMessageID, getJMSPriority, getJMSRedelivered, getJMSReplyTo, getJMSTimestamp, getJMSType, getLongProperty, getObjectProperty, getPropertyNames, getReceivedPulsarMessage, getShortProperty, getStringProperty, handleExceptionAccordingToMessageSpecs, isReceivedFromConsumer, negativeAck, propertyExists, readJMSPriority, setBooleanProperty, setByteProperty, setDoubleProperty, setFloatProperty, setIntProperty, setJMSCorrelationID, setJMSCorrelationIDAsBytes, setJMSDeliveryMode, setJMSDeliveryTime, setJMSDestination, setJMSExpiration, setJMSMessageID, setJMSPriority, setJMSRedelivered, setJMSReplyTo, setJMSTimestamp, setJMSType, setLongProperty, setObjectProperty, setShortProperty, setStringProperty, setWritable, validateWritableObject

Methods inherited from class java.lang.Object

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

Methods inherited from interface javax.jms.Message

acknowledge, clearProperties, getBooleanProperty, getByteProperty, getDoubleProperty, getFloatProperty, getIntProperty, getJMSCorrelationID, getJMSCorrelationIDAsBytes, getJMSDeliveryMode, getJMSDeliveryTime, getJMSDestination, getJMSExpiration, getJMSMessageID, getJMSPriority, getJMSRedelivered, getJMSReplyTo, getJMSTimestamp, getJMSType, getLongProperty, getObjectProperty, getPropertyNames, getShortProperty, getStringProperty, propertyExists, setBooleanProperty, setByteProperty, setDoubleProperty, setFloatProperty, setIntProperty, setJMSCorrelationID, setJMSCorrelationIDAsBytes, setJMSDeliveryMode, setJMSDeliveryTime, setJMSDestination, setJMSExpiration, setJMSMessageID, setJMSPriority, setJMSRedelivered, setJMSReplyTo, setJMSTimestamp, setJMSType, setLongProperty, setObjectProperty, setShortProperty, setStringProperty

Field Details

stream

protected ByteArrayOutputStream stream

originalMessage

protected byte[] originalMessage

dataInputStream

protected DataInputStream dataInputStream

dataOutputStream

protected DataOutputStream dataOutputStream

remainingByteArrayLen

protected int remainingByteArrayLen

TYPE_BOOLEAN

protected static final byte TYPE_BOOLEAN

See Also:

• Constant Field Values

TYPE_STRING

protected static final byte TYPE_STRING

See Also:

• Constant Field Values

TYPE_INT

protected static final byte TYPE_INT

See Also:

• Constant Field Values

TYPE_SHORT

protected static final byte TYPE_SHORT

See Also:

• Constant Field Values

TYPE_LONG

protected static final byte TYPE_LONG

See Also:

• Constant Field Values

TYPE_FLOAT

protected static final byte TYPE_FLOAT

See Also:

• Constant Field Values

TYPE_DOUBLE

protected static final byte TYPE_DOUBLE

See Also:

• Constant Field Values

TYPE_BYTE

protected static final byte TYPE_BYTE

See Also:

• Constant Field Values

TYPE_CHAR

protected static final byte TYPE_CHAR

See Also:

• Constant Field Values

TYPE_BYTES

protected static final byte TYPE_BYTES

See Also:

• Constant Field Values

TYPE_NULL

protected static final byte TYPE_NULL

See Also:

• Constant Field Values

Constructor Details

PulsarStreamMessage

public PulsarStreamMessage(byte[] payload)
                    throws javax.jms.JMSException

Throws:

javax.jms.JMSException

PulsarStreamMessage

public PulsarStreamMessage()

Method Details

messageType

protected String messageType()

Specified by:

messageType in class PulsarMessage

checkType

protected void checkType(byte type,
 byte expected)
                  throws javax.jms.JMSException

Throws:

javax.jms.JMSException

getBody

public <T> T getBody(Class<T> c)
              throws javax.jms.JMSException

Specified by:

getBody in interface javax.jms.Message

Throws:

javax.jms.JMSException

writeDataType

protected void writeDataType(byte dataType)
                      throws IOException

Throws:

IOException

writeArrayLen

protected void writeArrayLen(int len)
                      throws IOException

Throws:

IOException

readArrayLen

protected int readArrayLen()
                    throws IOException

Throws:

IOException

readDataType

protected byte readDataType()
                     throws IOException

Throws:

IOException

readBytes

public int readBytes(byte[] value)
              throws javax.jms.JMSException

Reads a byte array field from the stream message into the specified byte[] object (the read buffer).

To read the field value, readBytes should be successively called until it returns a value less than the length of the read buffer. The value of the bytes in the buffer following the last byte read is undefined.

If readBytes returns a value equal to the length of the buffer, a subsequent readBytes call must be made. If there are no more bytes to be read, this call returns -1.

If the byte array field value is null, readBytes returns -1.

If the byte array field value is empty, readBytes returns 0.

Once the first readBytes call on a byte[] field value has been made, the full value of the field must be read before it is valid to read the next field. An attempt to read the next field before that has been done will throw a MessageFormatException.

To read the byte field value into a new byte[] object, use the readObject method.

Specified by:

readBytes in interface javax.jms.StreamMessage

Parameters:

value - the buffer into which the data is read

Returns:

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

Throws:

javax.jms.JMSException - if the JMS provider fails to read the message due to some internal error.

javax.jms.MessageEOFException - if unexpected end of message stream has been reached.

javax.jms.MessageFormatException - if this type conversion is invalid.

javax.jms.MessageNotReadableException - if the message is in write-only mode.

See Also:

• readObject()

readObject

public Object readObject()
                  throws javax.jms.JMSException

Reads an object from the stream message.

This method can be used to return, in objectified format, an object in the Java programming language ("Java object") that has been written to the stream with the equivalent writeObject method call, or its equivalent primitive writetype method.

Note that byte values are returned as byte[], not Byte[].

An attempt to call readObject to read a byte field value into a new byte[] object before the full value of the byte field has been read will throw a MessageFormatException.

Specified by:

readObject in interface javax.jms.StreamMessage

Returns:

a Java object from the stream message, in objectified format (for example, if the object was written as an int, an Integer is returned)

Throws:

javax.jms.JMSException - if the JMS provider fails to read the message due to some internal error.

javax.jms.MessageEOFException - if unexpected end of message stream has been reached.

javax.jms.MessageFormatException - if this type conversion is invalid.

javax.jms.MessageNotReadableException - if the message is in write-only mode.

See Also:

• readBytes(byte[] value)

isBodyAssignableTo

public boolean isBodyAssignableTo(Class c)
                           throws javax.jms.JMSException

Returns whether the message body is capable of being assigned to the specified type. If this method returns true then a subsequent call to the method getBody on the same message with the same type argument would not throw a MessageFormatException.

If the message is a StreamMessage then false is always returned. If the message is a ObjectMessage and object deserialization fails then false is returned. If the message has no body then any type may be specified and true is returned.

Specified by:

isBodyAssignableTo in interface javax.jms.Message

Parameters:

c - The specified type
If the message is a TextMessage then this method will only return true if this parameter is set to String.class or another type to which a String is assignable.
If the message is a ObjectMessage then this method will only return true if this parameter is set to java.io.Serializable.class or another class to which the body is assignable.
If the message is a MapMessage then this method will only return true if this parameter is set to java.util.Map.class (or java.lang.Object.class).
If the message is a BytesMessage then this this method will only return true if this parameter is set to byte[].class (or java.lang.Object.class).
If the message is a TextMessage, ObjectMessage, MapMessage or BytesMessage and the message has no body, then the above does not apply and this method will return true irrespective of the value of this parameter.
If the message is a Message (but not one of its subtypes) then this method will return true irrespective of the value of this parameter.

Returns:

whether the message body is capable of being assigned to the specified type

Throws:

javax.jms.JMSException - if the JMS provider fails to return a value due to some internal error.

prepareForSend

protected void prepareForSend(org.apache.pulsar.client.api.TypedMessageBuilder<byte[]> producer)
                       throws javax.jms.JMSException

Specified by:

prepareForSend in class PulsarMessage

Throws:

javax.jms.JMSException

readBoolean

public boolean readBoolean()
                    throws javax.jms.JMSException

Reads a boolean from the stream message.

Specified by:

readBoolean in interface javax.jms.StreamMessage

Returns:

the boolean value read

Throws:

javax.jms.JMSException - if the JMS provider fails to read the message due to some internal error.

javax.jms.MessageEOFException - if unexpected end of message stream has been reached.

javax.jms.MessageFormatException - if this type conversion is invalid.

javax.jms.MessageNotReadableException - if the message is in write-only mode.

readByte

public byte readByte()
              throws javax.jms.JMSException

Reads a byte value from the stream message.

Specified by:

readByte in interface javax.jms.StreamMessage

Returns:

the next byte from the stream message as a 8-bit byte

Throws:

javax.jms.JMSException - if the JMS provider fails to read the message due to some internal error.

javax.jms.MessageEOFException - if unexpected end of message stream has been reached.

javax.jms.MessageFormatException - if this type conversion is invalid.

javax.jms.MessageNotReadableException - if the message is in write-only mode.

readShort

public short readShort()
                throws javax.jms.JMSException

Reads a 16-bit integer from the stream message.

Specified by:

readShort in interface javax.jms.StreamMessage

Returns:

a 16-bit integer from the stream message

Throws:

javax.jms.JMSException - if the JMS provider fails to read the message due to some internal error.

javax.jms.MessageEOFException - if unexpected end of message stream has been reached.

javax.jms.MessageFormatException - if this type conversion is invalid.

javax.jms.MessageNotReadableException - if the message is in write-only mode.

readChar

public char readChar()
              throws javax.jms.JMSException

Reads a Unicode character value from the stream message.

Specified by:

readChar in interface javax.jms.StreamMessage

Returns:

a Unicode character from the stream message

Throws:

javax.jms.JMSException - if the JMS provider fails to read the message due to some internal error.

javax.jms.MessageEOFException - if unexpected end of message stream has been reached.

javax.jms.MessageFormatException - if this type conversion is invalid

javax.jms.MessageNotReadableException - if the message is in write-only mode.

readInt

public int readInt()
            throws javax.jms.JMSException

Reads a 32-bit integer from the stream message.

Specified by:

readInt in interface javax.jms.StreamMessage

Returns:

a 32-bit integer value from the stream message, interpreted as an int

Throws:

javax.jms.JMSException - if the JMS provider fails to read the message due to some internal error.

javax.jms.MessageEOFException - if unexpected end of message stream has been reached.

javax.jms.MessageFormatException - if this type conversion is invalid.

javax.jms.MessageNotReadableException - if the message is in write-only mode.

readLong

public long readLong()
              throws javax.jms.JMSException

Reads a 64-bit integer from the stream message.

Specified by:

readLong in interface javax.jms.StreamMessage

Returns:

a 64-bit integer value from the stream message, interpreted as a long

Throws:

javax.jms.JMSException - if the JMS provider fails to read the message due to some internal error.

javax.jms.MessageEOFException - if unexpected end of message stream has been reached.

javax.jms.MessageFormatException - if this type conversion is invalid.

javax.jms.MessageNotReadableException - if the message is in write-only mode.

readFloat

public float readFloat()
                throws javax.jms.JMSException

Reads a float from the stream message.

Specified by:

readFloat in interface javax.jms.StreamMessage

Returns:

a float value from the stream message

Throws:

javax.jms.JMSException - if the JMS provider fails to read the message due to some internal error.

javax.jms.MessageEOFException - if unexpected end of message stream has been reached.

javax.jms.MessageFormatException - if this type conversion is invalid.

javax.jms.MessageNotReadableException - if the message is in write-only mode.

readDouble

public double readDouble()
                  throws javax.jms.JMSException

Reads a double from the stream message.

Specified by:

readDouble in interface javax.jms.StreamMessage

Returns:

a double value from the stream message

Throws:

javax.jms.JMSException - if the JMS provider fails to read the message due to some internal error.

javax.jms.MessageEOFException - if unexpected end of message stream has been reached.

javax.jms.MessageFormatException - if this type conversion is invalid.

javax.jms.MessageNotReadableException - if the message is in write-only mode.

readString

public String readString()
                  throws javax.jms.JMSException

Reads a String from the stream message.

Specified by:

readString in interface javax.jms.StreamMessage

Returns:

a Unicode string from the stream message

Throws:

javax.jms.JMSException - if the JMS provider fails to read the message due to some internal error.

javax.jms.MessageEOFException - if unexpected end of message stream has been reached.

javax.jms.MessageFormatException - if this type conversion is invalid.

javax.jms.MessageNotReadableException - if the message is in write-only mode.

writeBoolean

public void writeBoolean(boolean value)
                  throws javax.jms.JMSException

Writes a boolean to the stream message. The value true is written as the value (byte)1; the value false is written as the value (byte)0.

Specified by:

writeBoolean in interface javax.jms.StreamMessage

Parameters:

value - the boolean value to be written

Throws:

javax.jms.JMSException - if the JMS provider fails to write the message due to some internal error.

javax.jms.MessageNotWriteableException - if the message is in read-only mode.

writeByte

public void writeByte(byte value)
               throws javax.jms.JMSException

Writes a byte to the stream message.

Specified by:

writeByte in interface javax.jms.StreamMessage

Parameters:

value - the byte value to be written

Throws:

javax.jms.JMSException - if the JMS provider fails to write the message due to some internal error.

javax.jms.MessageNotWriteableException - if the message is in read-only mode.

writeShort

public void writeShort(short value)
                throws javax.jms.JMSException

Writes a short to the stream message.

Specified by:

writeShort in interface javax.jms.StreamMessage

Parameters:

value - the short value to be written

Throws:

javax.jms.JMSException - if the JMS provider fails to write the message due to some internal error.

javax.jms.MessageNotWriteableException - if the message is in read-only mode.

writeChar

public void writeChar(char value)
               throws javax.jms.JMSException

Writes a char to the stream message.

Specified by:

writeChar in interface javax.jms.StreamMessage

Parameters:

value - the char value to be written

Throws:

javax.jms.JMSException - if the JMS provider fails to write the message due to some internal error.

javax.jms.MessageNotWriteableException - if the message is in read-only mode.

writeInt

public void writeInt(int value)
              throws javax.jms.JMSException

Writes an int to the stream message.

Specified by:

writeInt in interface javax.jms.StreamMessage

Parameters:

value - the int value to be written

Throws:

javax.jms.JMSException - if the JMS provider fails to write the message due to some internal error.

javax.jms.MessageNotWriteableException - if the message is in read-only mode.

writeLong

public void writeLong(long value)
               throws javax.jms.JMSException

Writes a long to the stream message.

Specified by:

writeLong in interface javax.jms.StreamMessage

Parameters:

value - the long value to be written

Throws:

javax.jms.JMSException - if the JMS provider fails to write the message due to some internal error.

javax.jms.MessageNotWriteableException - if the message is in read-only mode.

writeFloat

public void writeFloat(float value)
                throws javax.jms.JMSException

Writes a float to the stream message.

Specified by:

writeFloat in interface javax.jms.StreamMessage

Parameters:

value - the float value to be written

Throws:

javax.jms.JMSException - if the JMS provider fails to write the message due to some internal error.

javax.jms.MessageNotWriteableException - if the message is in read-only mode.

writeDouble

public void writeDouble(double value)
                 throws javax.jms.JMSException

Writes a double to the stream message.

Specified by:

writeDouble in interface javax.jms.StreamMessage

Parameters:

value - the double value to be written

Throws:

javax.jms.JMSException - if the JMS provider fails to write the message due to some internal error.

javax.jms.MessageNotWriteableException - if the message is in read-only mode.

writeString

public void writeString(String value)
                 throws javax.jms.JMSException

Writes a String to the stream message.

Specified by:

writeString in interface javax.jms.StreamMessage

Parameters:

value - the String value to be written

Throws:

javax.jms.JMSException - if the JMS provider fails to write the message due to some internal error.

javax.jms.MessageNotWriteableException - if the message is in read-only mode.

writeBytes

public void writeBytes(byte[] value)
                throws javax.jms.JMSException

Writes a byte array field to the stream message.

The byte array value is written to the message as a byte array field. Consecutively written byte array fields are treated as two distinct fields when the fields are read.

Specified by:

writeBytes in interface javax.jms.StreamMessage

Parameters:

value - the byte array value to be written

Throws:

javax.jms.JMSException - if the JMS provider fails to write the message due to some internal error.

javax.jms.MessageNotWriteableException - if the message is in read-only mode.

writeBytes

public void writeBytes(byte[] value,
 int offset,
 int length)
                throws javax.jms.JMSException

Writes a portion of a byte array as a byte array field to the stream message.

The a portion of the byte array value is written to the message as a byte array field. Consecutively written byte array fields are treated as two distinct fields when the fields are read.

Specified by:

writeBytes in interface javax.jms.StreamMessage

Parameters:

value - the byte array value to be written

offset - the initial offset within the byte array

length - the number of bytes to use

Throws:

javax.jms.JMSException - if the JMS provider fails to write the message due to some internal error.

javax.jms.MessageNotWriteableException - if the message is in read-only mode.

writeObject

public void writeObject(Object value)
                 throws javax.jms.JMSException

Writes an object to the stream message.

This method works only for the objectified primitive object types (Integer, Double, Long ...), String objects, and byte arrays.

Specified by:

writeObject in interface javax.jms.StreamMessage

Parameters:

value - the Java object to be written

Throws:

javax.jms.JMSException - if the JMS provider fails to write the message due to some internal error.

javax.jms.MessageFormatException - if the object is invalid.

javax.jms.MessageNotWriteableException - if the message is in read-only mode.

clearBody

public void clearBody()
               throws javax.jms.JMSException

Clears out the message body. Clearing a message's body does not clear its header values or property entries.

If this message body was read-only, calling this method leaves the message body in the same state as an empty body in a newly created message.

Specified by:

clearBody in interface javax.jms.Message

Throws:

javax.jms.JMSException - if the JMS provider fails to clear the message body due to some internal error.

reset

public void reset()
           throws javax.jms.JMSException

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

Specified by:

reset in interface javax.jms.StreamMessage

Throws:

javax.jms.JMSException - if the JMS provider fails to reset the message due to some internal error.

javax.jms.MessageFormatException - if the message has an invalid format.

getBodyLength

public long getBodyLength()
                   throws javax.jms.JMSException

Gets the number of bytes of the message body when the message is in read-only mode. The value returned can be used to allocate a byte array. The value returned is the entire length of the message body, regardless of where the pointer for reading the message is currently located.

Returns:

number of bytes in the message

Throws:

javax.jms.JMSException - if the JMS provider fails to read the message due to some internal error.

javax.jms.MessageNotReadableException - if the message is in write-only mode.

Since:

JMS 1.1

readUnsignedByte

public int readUnsignedByte()
                     throws javax.jms.JMSException

Reads an unsigned 8-bit number from the bytes message stream.

Returns:

the next byte from the bytes message stream, interpreted as an unsigned 8-bit number

Throws:

javax.jms.JMSException - if the JMS provider fails to read the message due to some internal error.

javax.jms.MessageEOFException - if unexpected end of bytes stream has been reached.

javax.jms.MessageNotReadableException - if the message is in write-only mode.

readUnsignedShort

public int readUnsignedShort()
                      throws javax.jms.JMSException

Reads an unsigned 16-bit number from the bytes message stream.

Returns:

the next two bytes from the bytes message stream, interpreted as an unsigned 16-bit integer

Throws:

javax.jms.JMSException - if the JMS provider fails to read the message due to some internal error.

javax.jms.MessageEOFException - if unexpected end of bytes stream has been reached.

javax.jms.MessageNotReadableException - if the message is in write-only mode.

readUTF

public String readUTF()
               throws javax.jms.JMSException

Reads a string that has been encoded using a modified UTF-8 format from the bytes message stream.

For more information on the UTF-8 format, see "File System Safe UCS Transformation Format (FSS_UTF)", X/Open Preliminary Specification, X/Open Company Ltd., Document Number: P316. This information also appears in ISO/IEC 10646, Annex P.

Returns:

a Unicode string from the bytes message stream

Throws:

javax.jms.JMSException - if the JMS provider fails to read the message due to some internal error.

javax.jms.MessageEOFException - if unexpected end of bytes stream has been reached.

javax.jms.MessageNotReadableException - if the message is in write-only mode.

readBytes

public int readBytes(byte[] value,
 int length)
              throws javax.jms.JMSException

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:

value - 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

Throws:

javax.jms.JMSException - if the JMS provider fails to read the message due to some internal error.

javax.jms.MessageNotReadableException - if the message is in write-only mode.

writeUTF

public void writeUTF(String value)
              throws javax.jms.JMSException

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

For more information on the UTF-8 format, see "File System Safe UCS Transformation Format (FSS_UTF)", X/Open Preliminary Specification, X/Open Company Ltd., Document Number: P316. This information also appears in ISO/IEC 10646, Annex P.

Parameters:

value - the String value to be written

Throws:

javax.jms.JMSException - if the JMS provider fails to write the message due to some internal error.

javax.jms.MessageNotWriteableException - if the message is in read-only mode.