org.apache.activemq.command.ActiveMQBytesMessage Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.activemq.command;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.EOFException;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.Deflater;
import java.util.zip.DeflaterOutputStream;
import java.util.zip.InflaterInputStream;
import javax.jms.BytesMessage;
import javax.jms.JMSException;
import javax.jms.MessageEOFException;
import javax.jms.MessageFormatException;
import javax.jms.MessageNotReadableException;
import javax.jms.MessageNotWriteableException;
import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.util.ByteArrayInputStream;
import org.apache.activemq.util.ByteArrayOutputStream;
import org.apache.activemq.util.ByteSequence;
import org.apache.activemq.util.ByteSequenceData;
import org.apache.activemq.util.JMSExceptionSupport;
/**
* A BytesMessage object is used to send a message containing a
* stream of uninterpreted bytes. It inherits from the Message
* interface and adds a bytes message body. The receiver of the message supplies
* the interpretation of the bytes.
*
* The BytesMessage methods are based largely on those found in
* java.io.DataInputStream and
* java.io.DataOutputStream.
*
* This message type is for client encoding of existing message formats. If
* possible, one of the other self-defining message types should be used
* instead.
*
* Although the JMS 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.
* They may also be written generically as objects. For instance, a call to
* BytesMessage.writeInt(6) is equivalent to
* BytesMessage.writeObject(new Integer(6)). Both forms are
* provided, because the explicit form is convenient for static programming, and
* the object form is needed when types are not known at compile time.
*
* 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.
*
* @openwire:marshaller code=24
* @see javax.jms.Session#createBytesMessage()
* @see javax.jms.MapMessage
* @see javax.jms.Message
* @see javax.jms.ObjectMessage
* @see javax.jms.StreamMessage
* @see javax.jms.TextMessage
*/
public class ActiveMQBytesMessage extends ActiveMQMessage implements BytesMessage {
public static final byte DATA_STRUCTURE_TYPE = CommandTypes.ACTIVEMQ_BYTES_MESSAGE;
protected transient DataOutputStream dataOut;
protected transient ByteArrayOutputStream bytesOut;
protected transient DataInputStream dataIn;
protected transient int length;
@Override
public Message copy() {
ActiveMQBytesMessage copy = new ActiveMQBytesMessage();
copy(copy);
return copy;
}
private void copy(ActiveMQBytesMessage copy) {
storeContent();
super.copy(copy);
copy.dataOut = null;
copy.bytesOut = null;
copy.dataIn = null;
}
@Override
public void onSend() throws JMSException {
super.onSend();
storeContent();
}
@Override
public void storeContent() {
try {
if (dataOut != null) {
dataOut.close();
ByteSequence bs = bytesOut.toByteSequence();
if (compressed) {
int pos = bs.offset;
ByteSequenceData.writeIntBig(bs, length);
bs.offset = pos;
}
setContent(bs);
bytesOut = null;
dataOut = null;
}
} catch (IOException ioe) {
throw new RuntimeException(ioe.getMessage(), ioe); // TODO verify
// RuntimeException
}
}
@Override
public byte getDataStructureType() {
return DATA_STRUCTURE_TYPE;
}
@Override
public String getJMSXMimeType() {
return "jms/bytes-message";
}
/**
* 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.
*
* @throws JMSException if the JMS provider fails to clear the message body
* due to some internal error.
*/
@Override
public void clearBody() throws JMSException {
super.clearBody();
this.dataOut = null;
this.dataIn = null;
this.bytesOut = null;
}
/**
* 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.
*
* @return number of bytes in the message
* @throws JMSException if the JMS provider fails to read the message due to
* some internal error.
* @throws MessageNotReadableException if the message is in write-only mode.
* @since 1.1
*/
@Override
public long getBodyLength() throws JMSException {
initializeReading();
return length;
}
/**
* Reads a boolean from the bytes message stream.
*
* @return the boolean value read
* @throws JMSException if the JMS provider fails to read the message due to
* some internal error.
* @throws MessageEOFException if unexpected end of bytes stream has been
* reached.
* @throws MessageNotReadableException if the message is in write-only mode.
*/
@Override
public boolean readBoolean() throws JMSException {
initializeReading();
try {
return this.dataIn.readBoolean();
} catch (EOFException e) {
throw JMSExceptionSupport.createMessageEOFException(e);
} catch (IOException e) {
throw JMSExceptionSupport.createMessageFormatException(e);
}
}
/**
* Reads a signed 8-bit value from the bytes message stream.
*
* @return the next byte from the bytes message stream as a signed 8-bit
* byte
* @throws JMSException if the JMS provider fails to read the message due to
* some internal error.
* @throws MessageEOFException if unexpected end of bytes stream has been
* reached.
* @throws MessageNotReadableException if the message is in write-only mode.
*/
@Override
public byte readByte() throws JMSException {
initializeReading();
try {
return this.dataIn.readByte();
} catch (EOFException e) {
throw JMSExceptionSupport.createMessageEOFException(e);
} catch (IOException e) {
throw JMSExceptionSupport.createMessageFormatException(e);
}
}
/**
* Reads an unsigned 8-bit number from the bytes message stream.
*
* @return the next byte from the bytes message stream, interpreted as an
* unsigned 8-bit number
* @throws JMSException if the JMS provider fails to read the message due to
* some internal error.
* @throws MessageEOFException if unexpected end of bytes stream has been
* reached.
* @throws MessageNotReadableException if the message is in write-only mode.
*/
@Override
public int readUnsignedByte() throws JMSException {
initializeReading();
try {
return this.dataIn.readUnsignedByte();
} catch (EOFException e) {
throw JMSExceptionSupport.createMessageEOFException(e);
} catch (IOException e) {
throw JMSExceptionSupport.createMessageFormatException(e);
}
}
/**
* Reads a signed 16-bit number from the bytes message stream.
*
* @return the next two bytes from the bytes message stream, interpreted as
* a signed 16-bit number
* @throws JMSException if the JMS provider fails to read the message due to
* some internal error.
* @throws MessageEOFException if unexpected end of bytes stream has been
* reached.
* @throws MessageNotReadableException if the message is in write-only mode.
*/
@Override
public short readShort() throws JMSException {
initializeReading();
try {
return this.dataIn.readShort();
} catch (EOFException e) {
throw JMSExceptionSupport.createMessageEOFException(e);
} catch (IOException e) {
throw JMSExceptionSupport.createMessageFormatException(e);
}
}
/**
* Reads an unsigned 16-bit number from the bytes message stream.
*
* @return the next two bytes from the bytes message stream, interpreted as
* an unsigned 16-bit integer
* @throws JMSException if the JMS provider fails to read the message due to
* some internal error.
* @throws MessageEOFException if unexpected end of bytes stream has been
* reached.
* @throws MessageNotReadableException if the message is in write-only mode.
*/
@Override
public int readUnsignedShort() throws JMSException {
initializeReading();
try {
return this.dataIn.readUnsignedShort();
} catch (EOFException e) {
throw JMSExceptionSupport.createMessageEOFException(e);
} catch (IOException e) {
throw JMSExceptionSupport.createMessageFormatException(e);
}
}
/**
* Reads a Unicode character value from the bytes message stream.
*
* @return the next two bytes from the bytes message stream as a Unicode
* character
* @throws JMSException if the JMS provider fails to read the message due to
* some internal error.
* @throws MessageEOFException if unexpected end of bytes stream has been
* reached.
* @throws MessageNotReadableException if the message is in write-only mode.
*/
@Override
public char readChar() throws JMSException {
initializeReading();
try {
return this.dataIn.readChar();
} catch (EOFException e) {
throw JMSExceptionSupport.createMessageEOFException(e);
} catch (IOException e) {
throw JMSExceptionSupport.createMessageFormatException(e);
}
}
/**
* Reads a signed 32-bit integer from the bytes message stream.
*
* @return the next four bytes from the bytes message stream, interpreted as
* an int
* @throws JMSException if the JMS provider fails to read the message due to
* some internal error.
* @throws MessageEOFException if unexpected end of bytes stream has been
* reached.
* @throws MessageNotReadableException if the message is in write-only mode.
*/
@Override
public int readInt() throws JMSException {
initializeReading();
try {
return this.dataIn.readInt();
} catch (EOFException e) {
throw JMSExceptionSupport.createMessageEOFException(e);
} catch (IOException e) {
throw JMSExceptionSupport.createMessageFormatException(e);
}
}
/**
* Reads a signed 64-bit integer from the bytes message stream.
*
* @return the next eight bytes from the bytes message stream, interpreted
* as a long
* @throws JMSException if the JMS provider fails to read the message due to
* some internal error.
* @throws MessageEOFException if unexpected end of bytes stream has been
* reached.
* @throws MessageNotReadableException if the message is in write-only mode.
*/
@Override
public long readLong() throws JMSException {
initializeReading();
try {
return this.dataIn.readLong();
} catch (EOFException e) {
throw JMSExceptionSupport.createMessageEOFException(e);
} catch (IOException e) {
throw JMSExceptionSupport.createMessageFormatException(e);
}
}
/**
* Reads a float from the bytes message stream.
*
* @return the next four bytes from the bytes message stream, interpreted as
* a float
* @throws JMSException if the JMS provider fails to read the message due to
* some internal error.
* @throws MessageEOFException if unexpected end of bytes stream has been
* reached.
* @throws MessageNotReadableException if the message is in write-only mode.
*/
@Override
public float readFloat() throws JMSException {
initializeReading();
try {
return this.dataIn.readFloat();
} catch (EOFException e) {
throw JMSExceptionSupport.createMessageEOFException(e);
} catch (IOException e) {
throw JMSExceptionSupport.createMessageFormatException(e);
}
}
/**
* Reads a double from the bytes message stream.
*
* @return the next eight bytes from the bytes message stream, interpreted
* as a double
* @throws JMSException if the JMS provider fails to read the message due to
* some internal error.
* @throws MessageEOFException if unexpected end of bytes stream has been
* reached.
* @throws MessageNotReadableException if the message is in write-only mode.
*/
@Override
public double readDouble() throws JMSException {
initializeReading();
try {
return this.dataIn.readDouble();
} catch (EOFException e) {
throw JMSExceptionSupport.createMessageEOFException(e);
} catch (IOException e) {
throw JMSExceptionSupport.createMessageFormatException(e);
}
}
/**
* 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.
*
* @return a Unicode string from the bytes message stream
* @throws JMSException if the JMS provider fails to read the message due to
* some internal error.
* @throws MessageEOFException if unexpected end of bytes stream has been
* reached.
* @throws MessageNotReadableException if the message is in write-only mode.
*/
@Override
public String readUTF() throws JMSException {
initializeReading();
try {
return this.dataIn.readUTF();
} catch (EOFException e) {
throw JMSExceptionSupport.createMessageEOFException(e);
} catch (IOException e) {
throw JMSExceptionSupport.createMessageFormatException(e);
}
}
/**
* 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.
*
* @param value the buffer into which the data is read
* @return 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 JMSException if the JMS provider fails to read the message due to
* some internal error.
* @throws MessageNotReadableException if the message is in write-only mode.
*/
@Override
public int readBytes(byte[] value) throws JMSException {
return readBytes(value, value.length);
}
/**
* 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.
*
* @param value the buffer into which the data is read
* @param length the number of bytes to read; must be less than or equal to
* value.length
* @return 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 JMSException if the JMS provider fails to read the message due to
* some internal error.
* @throws MessageNotReadableException if the message is in write-only mode.
*/
@Override
public int readBytes(byte[] value, int length) throws JMSException {
initializeReading();
try {
int n = 0;
while (n < length) {
int count = this.dataIn.read(value, n, length - n);
if (count < 0) {
break;
}
n += count;
}
if (n == 0 && length > 0) {
n = -1;
}
return n;
} catch (EOFException e) {
throw JMSExceptionSupport.createMessageEOFException(e);
} catch (IOException e) {
throw JMSExceptionSupport.createMessageFormatException(e);
}
}
/**
* 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.
*
* @param value the boolean value to be written
* @throws JMSException if the JMS provider fails to write the message due
* to some internal error.
* @throws MessageNotWriteableException if the message is in read-only mode.
*/
@Override
public void writeBoolean(boolean value) throws JMSException {
initializeWriting();
try {
this.dataOut.writeBoolean(value);
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
}
/**
* Writes a byte to the bytes message stream as a 1-byte
* value.
*
* @param value the byte value to be written
* @throws JMSException if the JMS provider fails to write the message due
* to some internal error.
* @throws MessageNotWriteableException if the message is in read-only mode.
*/
@Override
public void writeByte(byte value) throws JMSException {
initializeWriting();
try {
this.dataOut.writeByte(value);
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
}
/**
* Writes a short to the bytes message stream as two bytes,
* high byte first.
*
* @param value the short to be written
* @throws JMSException if the JMS provider fails to write the message due
* to some internal error.
* @throws MessageNotWriteableException if the message is in read-only mode.
*/
@Override
public void writeShort(short value) throws JMSException {
initializeWriting();
try {
this.dataOut.writeShort(value);
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
}
/**
* Writes a char to the bytes message stream as a 2-byte
* value, high byte first.
*
* @param value the char value to be written
* @throws JMSException if the JMS provider fails to write the message due
* to some internal error.
* @throws MessageNotWriteableException if the message is in read-only mode.
*/
@Override
public void writeChar(char value) throws JMSException {
initializeWriting();
try {
this.dataOut.writeChar(value);
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
}
/**
* Writes an int to the bytes message stream as four bytes,
* high byte first.
*
* @param value the int to be written
* @throws JMSException if the JMS provider fails to write the message due
* to some internal error.
* @throws MessageNotWriteableException if the message is in read-only mode.
*/
@Override
public void writeInt(int value) throws JMSException {
initializeWriting();
try {
this.dataOut.writeInt(value);
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
}
/**
* Writes a long to the bytes message stream as eight bytes,
* high byte first.
*
* @param value the long to be written
* @throws JMSException if the JMS provider fails to write the message due
* to some internal error.
* @throws MessageNotWriteableException if the message is in read-only mode.
*/
@Override
public void writeLong(long value) throws JMSException {
initializeWriting();
try {
this.dataOut.writeLong(value);
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
}
/**
* Converts the float argument to an int using
* the floatToIntBits method in class Float,
* and then writes that int value to the bytes message stream
* as a 4-byte quantity, high byte first.
*
* @param value the float value to be written
* @throws JMSException if the JMS provider fails to write the message due
* to some internal error.
* @throws MessageNotWriteableException if the message is in read-only mode.
*/
@Override
public void writeFloat(float value) throws JMSException {
initializeWriting();
try {
this.dataOut.writeFloat(value);
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
}
/**
* Converts the double argument to a long
* using the doubleToLongBits method in class
* Double, and then writes that long value to
* the bytes message stream as an 8-byte quantity, high byte first.
*
* @param value the double value to be written
* @throws JMSException if the JMS provider fails to write the message due
* to some internal error.
* @throws MessageNotWriteableException if the message is in read-only mode.
*/
@Override
public void writeDouble(double value) throws JMSException {
initializeWriting();
try {
this.dataOut.writeDouble(value);
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
}
/**
* 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.
*
* @param value the String value to be written
* @throws JMSException if the JMS provider fails to write the message due
* to some internal error.
* @throws MessageNotWriteableException if the message is in read-only mode.
*/
@Override
public void writeUTF(String value) throws JMSException {
initializeWriting();
try {
this.dataOut.writeUTF(value);
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
}
/**
* Writes a byte array to the bytes message stream.
*
* @param value the byte array to be written
* @throws JMSException if the JMS provider fails to write the message due
* to some internal error.
* @throws MessageNotWriteableException if the message is in read-only mode.
*/
@Override
public void writeBytes(byte[] value) throws JMSException {
initializeWriting();
try {
this.dataOut.write(value);
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
}
/**
* Writes a portion of a byte array to the bytes message stream.
*
* @param value the byte array value to be written
* @param offset the initial offset within the byte array
* @param length the number of bytes to use
* @throws JMSException if the JMS provider fails to write the message due
* to some internal error.
* @throws MessageNotWriteableException if the message is in read-only mode.
*/
@Override
public void writeBytes(byte[] value, int offset, int length) throws JMSException {
initializeWriting();
try {
this.dataOut.write(value, offset, length);
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
}
/**
* Writes an object to the bytes message stream.
*
* This method works only for the objectified primitive object types (Integer,Double,
* Long ...), String objects, and byte
* arrays.
*
* @param value the object in the Java programming language ("Java object")
* to be written; it must not be null
* @throws JMSException if the JMS provider fails to write the message due
* to some internal error.
* @throws MessageFormatException if the object is of an invalid type.
* @throws MessageNotWriteableException if the message is in read-only mode.
* @throws java.lang.NullPointerException if the parameter
* value is null.
*/
@Override
public void writeObject(Object value) throws JMSException {
if (value == null) {
throw new NullPointerException();
}
initializeWriting();
if (value instanceof Boolean) {
writeBoolean(((Boolean)value).booleanValue());
} else if (value instanceof Character) {
writeChar(((Character)value).charValue());
} else if (value instanceof Byte) {
writeByte(((Byte)value).byteValue());
} else if (value instanceof Short) {
writeShort(((Short)value).shortValue());
} else if (value instanceof Integer) {
writeInt(((Integer)value).intValue());
} else if (value instanceof Long) {
writeLong(((Long)value).longValue());
} else if (value instanceof Float) {
writeFloat(((Float)value).floatValue());
} else if (value instanceof Double) {
writeDouble(((Double)value).doubleValue());
} else if (value instanceof String) {
writeUTF(value.toString());
} else if (value instanceof byte[]) {
writeBytes((byte[])value);
} else {
throw new MessageFormatException("Cannot write non-primitive type:" + value.getClass());
}
}
/**
* Puts the message body in read-only mode and repositions the stream of
* bytes to the beginning.
*
* @throws JMSException if an internal error occurs
*/
@Override
public void reset() throws JMSException {
storeContent();
this.bytesOut = null;
if (dataIn != null) {
try {
// Eagerly release potential Inflater memory buffers.
dataIn.close();
} catch (Exception e) {
}
}
this.dataIn = null;
this.dataOut = null;
setReadOnlyBody(true);
}
private void initializeWriting() throws JMSException {
checkReadOnlyBody();
if (this.dataOut == null) {
this.bytesOut = new ByteArrayOutputStream();
OutputStream os = bytesOut;
ActiveMQConnection connection = getConnection();
if (connection != null && connection.isUseCompression()) {
// keep track of the real length of the content if
// we are compressed.
try {
os.write(new byte[4]);
} catch (IOException e) {
throw JMSExceptionSupport.create(e);
}
length = 0;
compressed = true;
final Deflater deflater = new Deflater(Deflater.BEST_SPEED);
os = new FilterOutputStream(new DeflaterOutputStream(os, deflater)) {
@Override
public void write(byte[] arg0) throws IOException {
length += arg0.length;
out.write(arg0);
}
@Override
public void write(byte[] arg0, int arg1, int arg2) throws IOException {
length += arg2;
out.write(arg0, arg1, arg2);
}
@Override
public void write(int arg0) throws IOException {
length++;
out.write(arg0);
}
@Override
public void close() throws IOException {
super.close();
deflater.end();
}
};
}
this.dataOut = new DataOutputStream(os);
}
restoreOldContent();
}
private void restoreOldContent() throws JMSException {
// For a message that already had a body and was sent we need to restore the content
// if the message is used again without having its clearBody method called.
if (this.content != null && this.content.length > 0) {
try {
ByteSequence toRestore = this.content;
if (compressed) {
InputStream is = new ByteArrayInputStream(toRestore);
int length = 0;
try {
DataInputStream dis = new DataInputStream(is);
length = dis.readInt();
dis.close();
} catch (IOException e) {
throw JMSExceptionSupport.create(e);
}
is = new InflaterInputStream(is);
DataInputStream input = new DataInputStream(is);
byte[] buffer = new byte[length];
input.readFully(buffer);
toRestore = new ByteSequence(buffer);
}
this.dataOut.write(toRestore.getData(), toRestore.getOffset(), toRestore.getLength());
// Free up the buffer from the old content, will be re-written when
// the message is sent again and storeContent() is called.
this.content = null;
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
}
}
protected void checkWriteOnlyBody() throws MessageNotReadableException {
if (!readOnlyBody) {
throw new MessageNotReadableException("Message body is write-only");
}
}
private void initializeReading() throws JMSException {
checkWriteOnlyBody();
if (dataIn == null) {
ByteSequence data = getContent();
if (data == null) {
data = new ByteSequence(new byte[] {}, 0, 0);
}
InputStream is = new ByteArrayInputStream(data);
if (isCompressed()) {
// keep track of the real length of the content if
// we are compressed.
try {
DataInputStream dis = new DataInputStream(is);
length = dis.readInt();
dis.close();
} catch (IOException e) {
throw JMSExceptionSupport.create(e);
}
is = new InflaterInputStream(is);
} else {
length = data.getLength();
}
dataIn = new DataInputStream(is);
}
}
@Override
public void setObjectProperty(String name, Object value) throws JMSException {
initializeWriting();
super.setObjectProperty(name, value);
}
@Override
public String toString() {
return super.toString() + " ActiveMQBytesMessage{ " + "bytesOut = " + bytesOut + ", dataOut = " + dataOut + ", dataIn = " + dataIn + " }";
}
@Override
protected void doCompress() throws IOException {
compressed = true;
ByteSequence bytes = getContent();
int length = bytes.getLength();
ByteArrayOutputStream bytesOut = new ByteArrayOutputStream();
bytesOut.write(new byte[4]);
DeflaterOutputStream os = new DeflaterOutputStream(bytesOut);
DataOutputStream dataOut = new DataOutputStream(os);
dataOut.write(bytes.data, bytes.offset, bytes.length);
dataOut.flush();
dataOut.close();
bytes = bytesOut.toByteSequence();
ByteSequenceData.writeIntBig(bytes, length);
bytes.offset = 0;
setContent(bytes);
}
@Override
protected void finalize() throws Throwable {
// Attempt to do eager close in case of compressed data which uses a
// wrapped InflaterInputStream.
if (dataIn != null) {
try {
dataIn.close();
} catch(Exception e) {
}
}
}
}