com.amazon.sqs.javamessaging.message

Class SQSBytesMessage

java.lang.Object

com.amazon.sqs.javamessaging.message.SQSMessage

com.amazon.sqs.javamessaging.message.SQSBytesMessage

All Implemented Interfaces:

javax.jms.BytesMessage, javax.jms.Message

public class SQSBytesMessage
extends SQSMessage
implements javax.jms.BytesMessage

This class borrows from ActiveMQStreamMessage, which is also licensed under Apache2.0. Its methods are based largely on those found in java.io.DataInputStream and java.io.DataOutputStream.

See Also:

org.apache.activemq.command.ActiveMQStreamMessage

Nested Class Summary

Nested classes/interfaces inherited from class com.amazon.sqs.javamessaging.message.SQSMessage

SQSMessage.JMSMessagePropertyValue, SQSMessage.TypeConversionSupport

Field Summary

Fields inherited from class com.amazon.sqs.javamessaging.message.SQSMessage

BYTE_MESSAGE_TYPE, JMS_SQS_CORRELATION_ID, JMS_SQS_MESSAGE_TYPE, JMS_SQS_REPLY_TO_QUEUE_NAME, JMS_SQS_REPLY_TO_QUEUE_URL, OBJECT_MESSAGE_TYPE, TEXT_MESSAGE_TYPE

Fields inherited from interface javax.jms.Message

DEFAULT_DELIVERY_MODE, DEFAULT_PRIORITY, DEFAULT_TIME_TO_LIVE

Constructor Summary

Constructors

Constructor and Description
SQSBytesMessage() Create new empty BytesMessage to send.
SQSBytesMessage(Acknowledger acknowledger, String queueUrl, com.amazonaws.services.sqs.model.Message sqsMessage) Convert received SQSMessage into BytesMessage.

Method Summary

Modifier and Type	Method and Description
void	clearBody() When the message is first created, and when clearBody is called, the body of the message is in write-only mode.
byte[]	getBodyAsBytes() Reads the body of message, which can be either the body returned from the the receives message as bytes or the bytes put in bytesOut if it is a sent message.
long	getBodyLength() Gets the number of bytes of the message body when the message is in read-only mode.
boolean	readBoolean() Reads a boolean from the bytes message stream.
byte	readByte() Reads a signed 8-bit value from the bytes message stream.
int	readBytes(byte[] value) Reads a byte array from the bytes message stream.
int	readBytes(byte[] value, int length) Reads a portion of the bytes message stream.
char	readChar() Reads a Unicode character value from the bytes message stream.
double	readDouble() Reads a double from the bytes message stream.
float	readFloat() Reads a float from the bytes message stream.
int	readInt() Reads a 32-bit integer from the bytes message stream.
long	readLong() Reads a 64-bit integer from the bytes message stream.
short	readShort() Reads a signed 16-bit number from the bytes message stream.
int	readUnsignedByte() Reads an unsigned 8-bit value 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 UTF-8 format from the bytes message stream
void	reset() Puts the message body in read-only mode and repositions the stream of bytes to the beginning.
void	writeBoolean(boolean value) Writes a boolean to the bytes message stream
void	writeByte(byte value) Writes a byte to the bytes message stream
void	writeBytes(byte[] value) Writes a byte array to the bytes message stream
void	writeBytes(byte[] value, int offset, int length) Writes a portion of a byte array to the bytes message stream.
void	writeChar(char value) Writes a char to the bytes message stream
void	writeDouble(double value) Writes a double to the bytes message stream
void	writeFloat(float value) Writes a float to the bytes message stream
void	writeInt(int value) Writes a int to the bytes message stream
void	writeLong(long value) Writes a long to the bytes message stream
void	writeObject(Object value) Writes an object to the bytes message stream.
void	writeShort(short value) Writes a short to the bytes message stream
void	writeUTF(String value) Writes a string that has been encoded using a UTF-8 format to the bytes message stream

Methods inherited from class com.amazon.sqs.javamessaging.message.SQSMessage

acknowledge, checkBodyWritePermissions, checkPropertyWritePermissions, clearProperties, convertExceptionToJMSException, convertExceptionToMessageFormatException, getBooleanProperty, getByteProperty, getDoubleProperty, getFloatProperty, getIntProperty, getJMSCorrelationID, getJMSCorrelationIDAsBytes, getJMSDeliveryMode, getJMSDestination, getJMSExpiration, getJMSMessageID, getJMSMessagePropertyValue, getJMSPriority, getJMSRedelivered, getJMSReplyTo, getJMSTimestamp, getJMSType, getLongProperty, getObjectProperty, getPropertyNames, getQueueUrl, getReceiptHandle, getShortProperty, getSQSMessageDeduplicationId, getSQSMessageGroupId, getSQSMessageId, getSQSMessageSequenceNumber, getStringProperty, propertyExists, setBodyWritePermissions, setBooleanProperty, setByteProperty, setDoubleProperty, setFloatProperty, setIntProperty, setJMSCorrelationID, setJMSCorrelationIDAsBytes, setJMSDeliveryMode, setJMSDestination, setJMSExpiration, setJMSMessageID, setJMSPriority, setJMSRedelivered, setJMSReplyTo, setJMSTimestamp, setJMSType, setLongProperty, setObjectProperty, setSequenceNumber, setShortProperty, setSQSMessageId, setStringProperty

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, getJMSDestination, getJMSExpiration, getJMSMessageID, getJMSPriority, getJMSRedelivered, getJMSReplyTo, getJMSTimestamp, getJMSType, getLongProperty, getObjectProperty, getPropertyNames, getShortProperty, getStringProperty, propertyExists, setBooleanProperty, setByteProperty, setDoubleProperty, setFloatProperty, setIntProperty, setJMSCorrelationID, setJMSCorrelationIDAsBytes, setJMSDeliveryMode, setJMSDestination, setJMSExpiration, setJMSMessageID, setJMSPriority, setJMSRedelivered, setJMSReplyTo, setJMSTimestamp, setJMSType, setLongProperty, setObjectProperty, setShortProperty, setStringProperty

Constructor Detail

SQSBytesMessage

public SQSBytesMessage(Acknowledger acknowledger,
                       String queueUrl,
                       com.amazonaws.services.sqs.model.Message sqsMessage)
                throws javax.jms.JMSException

Convert received SQSMessage into BytesMessage.

Throws:

javax.jms.JMSException

SQSBytesMessage

public SQSBytesMessage()
                throws javax.jms.JMSException

Create new empty BytesMessage to send.

Throws:

javax.jms.JMSException

Method Detail

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.

Specified by:

getBodyLength in interface javax.jms.BytesMessage

Returns:

number of bytes in the message

Throws:

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

javax.jms.JMSException

readBoolean

public boolean readBoolean()
                    throws javax.jms.JMSException

Reads a boolean from the bytes message stream.

Specified by:

readBoolean in interface javax.jms.BytesMessage

Returns:

the boolean value

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.

readByte

public byte readByte()
              throws javax.jms.JMSException

Reads a signed 8-bit value from the bytes message stream.

Specified by:

readByte in interface javax.jms.BytesMessage

Returns:

the next byte from the bytes message stream as a signed 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 bytes stream has been reached.

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

readUnsignedByte

public int readUnsignedByte()
                     throws javax.jms.JMSException

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

Specified by:

readUnsignedByte in interface javax.jms.BytesMessage

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.

readShort

public short readShort()
                throws javax.jms.JMSException

Reads a signed 16-bit number from the bytes message stream.

Specified by:

readShort in interface javax.jms.BytesMessage

Returns:

the next two bytes from the bytes message stream, interpreted as a signed 16-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.

Specified by:

readUnsignedShort in interface javax.jms.BytesMessage

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.

readChar

public char readChar()
              throws javax.jms.JMSException

Reads a Unicode character value from the bytes message stream.

Specified by:

readChar in interface javax.jms.BytesMessage

Returns:

a Unicode character 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.

readInt

public int readInt()
            throws javax.jms.JMSException

Reads a 32-bit integer from the bytes message stream.

Specified by:

readInt in interface javax.jms.BytesMessage

Returns:

the next four bytes from the bytes message stream, 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 bytes stream has been reached.

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 bytes message stream.

Specified by:

readLong in interface javax.jms.BytesMessage

Returns:

a 64-bit integer value from the bytes message stream, 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 bytes stream has been reached.

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

readFloat

public float readFloat()
                throws javax.jms.JMSException

Reads a float from the bytes message stream.

Specified by:

readFloat in interface javax.jms.BytesMessage

Returns:

a float value 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.

readDouble

public double readDouble()
                  throws javax.jms.JMSException

Reads a double from the bytes message stream.

Specified by:

readDouble in interface javax.jms.BytesMessage

Returns:

a double value 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.

readUTF

public String readUTF()
               throws javax.jms.JMSException

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

Specified by:

readUTF in interface javax.jms.BytesMessage

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)
              throws javax.jms.JMSException

Reads a byte array from 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.

Specified by:

readBytes in interface javax.jms.BytesMessage

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 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.

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, then an IndexOutOfBoundsException is thrown. No bytes will be read from the stream for this exception case.

Specified by:

readBytes in interface javax.jms.BytesMessage

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.

writeBoolean

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

Writes a boolean to the bytes message stream

Specified by:

writeBoolean in interface javax.jms.BytesMessage

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 bytes message stream

Specified by:

writeByte in interface javax.jms.BytesMessage

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 bytes message stream

Specified by:

writeShort in interface javax.jms.BytesMessage

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 bytes message stream

Specified by:

writeChar in interface javax.jms.BytesMessage

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 a int to the bytes message stream

Specified by:

writeInt in interface javax.jms.BytesMessage

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 bytes message stream

Specified by:

writeLong in interface javax.jms.BytesMessage

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 bytes message stream

Specified by:

writeFloat in interface javax.jms.BytesMessage

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 bytes message stream

Specified by:

writeDouble in interface javax.jms.BytesMessage

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.

writeUTF

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

Writes a string that has been encoded using a UTF-8 format to the bytes message stream

Specified by:

writeUTF in interface javax.jms.BytesMessage

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 to the bytes message stream

Specified by:

writeBytes in interface javax.jms.BytesMessage

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 to the bytes message stream.

Specified by:

writeBytes in interface javax.jms.BytesMessage

Parameters:

value - The portion of 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 bytes message stream.

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

Specified by:

writeObject in interface javax.jms.BytesMessage

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.MessageNotWriteableException - If the message is in read-only mode.

javax.jms.MessageFormatException - If the object is of an invalid type.

NullPointerException - If the object is null.

reset

public void reset()
           throws javax.jms.JMSException

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

Specified by:

reset in interface javax.jms.BytesMessage

Throws:

javax.jms.JMSException

clearBody

public void clearBody()
               throws javax.jms.JMSException

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 is made, the message body goes to read-only mode. when the message is sent, the sender can retain and modify it without affecting the sent message. If clearBody is called on a message, when it is in read-only mode, the message body is cleared and the message goes to write-only mode.

Specified by:

clearBody in interface javax.jms.Message

Overrides:

clearBody in class SQSMessage

Throws:

javax.jms.JMSException - If directly called

getBodyAsBytes

public byte[] getBodyAsBytes()
                      throws javax.jms.JMSException

Reads the body of message, which can be either the body returned from the the receives message as bytes or the bytes put in bytesOut if it is a sent message.

Returns:

value The body returned as byte array

Throws:

javax.jms.JMSException