org.apache.activemq.command.ActiveMQStreamMessage Maven / Gradle / Ivy
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/**
* 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.BufferedInputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.DeflaterOutputStream;
import java.util.zip.InflaterInputStream;
import javax.jms.JMSException;
import javax.jms.MessageEOFException;
import javax.jms.MessageFormatException;
import javax.jms.MessageNotReadableException;
import javax.jms.MessageNotWriteableException;
import javax.jms.StreamMessage;
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.JMSExceptionSupport;
import org.apache.activemq.util.MarshallingSupport;
/**
* A StreamMessage object is used to send a stream of primitive
* types in the Java programming language. It is filled and read sequentially.
* It inherits from the Message interface and adds a stream
* message body. Its methods are based largely on those found in
* java.io.DataInputStream and
* java.io.DataOutputStream.
*
* The primitive types can be read or written explicitly using methods for each
* type. They may also be read or written generically as objects. For instance,
* a call to StreamMessage.writeInt(6) is equivalent to
* StreamMessage.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 body 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.
*
* StreamMessage objects support the following conversion table.
* The marked cases must be supported. The unmarked cases must throw a
* JMSException. The String-to-primitive
* conversions may throw a runtime exception if the primitive's
* valueOf() method does not accept it as a valid
* String representation of the primitive.
*
* A value written as the row type can be read as the column type.
*
*
* | | boolean byte short char int long float double String byte[]
* |----------------------------------------------------------------------
* |boolean | X X |byte | X X X X X |short | X X X X |char | X X |int | X X X
* |long | X X |float | X X X |double | X X |String | X X X X X X X X |byte[] |
* X |----------------------------------------------------------------------
*
*
*
*
*
* Attempting to read a null value as a primitive type must be treated as
* calling the primitive's corresponding valueOf(String)
* conversion method with a null value. Since char does not
* support a String conversion, attempting to read a null value
* as a char must throw a NullPointerException.
*
* @openwire:marshaller code="27"
* @see javax.jms.Session#createStreamMessage()
* @see javax.jms.BytesMessage
* @see javax.jms.MapMessage
* @see javax.jms.Message
* @see javax.jms.ObjectMessage
* @see javax.jms.TextMessage
*/
public class ActiveMQStreamMessage extends ActiveMQMessage implements StreamMessage {
public static final byte DATA_STRUCTURE_TYPE = CommandTypes.ACTIVEMQ_STREAM_MESSAGE;
protected transient DataOutputStream dataOut;
protected transient ByteArrayOutputStream bytesOut;
protected transient DataInputStream dataIn;
protected transient int remainingBytes = -1;
@Override
public Message copy() {
ActiveMQStreamMessage copy = new ActiveMQStreamMessage();
copy(copy);
return copy;
}
private void copy(ActiveMQStreamMessage 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() {
if (dataOut != null) {
try {
dataOut.close();
setContent(bytesOut.toByteSequence());
bytesOut = null;
dataOut = null;
} catch (IOException ioe) {
throw new RuntimeException(ioe);
}
}
}
@Override
public byte getDataStructureType() {
return DATA_STRUCTURE_TYPE;
}
@Override
public String getJMSXMimeType() {
return "jms/stream-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;
this.remainingBytes = -1;
}
/**
* Reads a boolean from the stream message.
*
* @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 message stream has been
* reached.
* @throws MessageFormatException if this type conversion is invalid.
* @throws MessageNotReadableException if the message is in write-only mode.
*/
@Override
public boolean readBoolean() throws JMSException {
initializeReading();
try {
this.dataIn.mark(10);
int type = this.dataIn.read();
if (type == -1) {
throw new MessageEOFException("reached end of data");
}
if (type == MarshallingSupport.BOOLEAN_TYPE) {
return this.dataIn.readBoolean();
}
if (type == MarshallingSupport.STRING_TYPE) {
return Boolean.valueOf(this.dataIn.readUTF()).booleanValue();
}
if (type == MarshallingSupport.NULL) {
this.dataIn.reset();
throw new NullPointerException("Cannot convert NULL value to boolean.");
} else {
this.dataIn.reset();
throw new MessageFormatException(" not a boolean type");
}
} catch (EOFException e) {
throw JMSExceptionSupport.createMessageEOFException(e);
} catch (IOException e) {
throw JMSExceptionSupport.createMessageFormatException(e);
}
}
/**
* Reads a byte value from the stream message.
*
* @return the next byte from the stream message as a 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 message stream has been
* reached.
* @throws MessageFormatException if this type conversion is invalid.
* @throws MessageNotReadableException if the message is in write-only mode.
*/
@Override
public byte readByte() throws JMSException {
initializeReading();
try {
this.dataIn.mark(10);
int type = this.dataIn.read();
if (type == -1) {
throw new MessageEOFException("reached end of data");
}
if (type == MarshallingSupport.BYTE_TYPE) {
return this.dataIn.readByte();
}
if (type == MarshallingSupport.STRING_TYPE) {
return Byte.valueOf(this.dataIn.readUTF()).byteValue();
}
if (type == MarshallingSupport.NULL) {
this.dataIn.reset();
throw new NullPointerException("Cannot convert NULL value to byte.");
} else {
this.dataIn.reset();
throw new MessageFormatException(" not a byte type");
}
} catch (NumberFormatException mfe) {
try {
this.dataIn.reset();
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
throw mfe;
} catch (EOFException e) {
throw JMSExceptionSupport.createMessageEOFException(e);
} catch (IOException e) {
throw JMSExceptionSupport.createMessageFormatException(e);
}
}
/**
* Reads a 16-bit integer from the stream message.
*
* @return a 16-bit integer from the stream message
* @throws JMSException if the JMS provider fails to read the message due to
* some internal error.
* @throws MessageEOFException if unexpected end of message stream has been
* reached.
* @throws MessageFormatException if this type conversion is invalid.
* @throws MessageNotReadableException if the message is in write-only mode.
*/
@Override
public short readShort() throws JMSException {
initializeReading();
try {
this.dataIn.mark(17);
int type = this.dataIn.read();
if (type == -1) {
throw new MessageEOFException("reached end of data");
}
if (type == MarshallingSupport.SHORT_TYPE) {
return this.dataIn.readShort();
}
if (type == MarshallingSupport.BYTE_TYPE) {
return this.dataIn.readByte();
}
if (type == MarshallingSupport.STRING_TYPE) {
return Short.valueOf(this.dataIn.readUTF()).shortValue();
}
if (type == MarshallingSupport.NULL) {
this.dataIn.reset();
throw new NullPointerException("Cannot convert NULL value to short.");
} else {
this.dataIn.reset();
throw new MessageFormatException(" not a short type");
}
} catch (NumberFormatException mfe) {
try {
this.dataIn.reset();
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
throw mfe;
} catch (EOFException e) {
throw JMSExceptionSupport.createMessageEOFException(e);
} catch (IOException e) {
throw JMSExceptionSupport.createMessageFormatException(e);
}
}
/**
* Reads a Unicode character value from the stream message.
*
* @return a Unicode character from the stream message
* @throws JMSException if the JMS provider fails to read the message due to
* some internal error.
* @throws MessageEOFException if unexpected end of message stream has been
* reached.
* @throws MessageFormatException if this type conversion is invalid
* @throws MessageNotReadableException if the message is in write-only mode.
*/
@Override
public char readChar() throws JMSException {
initializeReading();
try {
this.dataIn.mark(17);
int type = this.dataIn.read();
if (type == -1) {
throw new MessageEOFException("reached end of data");
}
if (type == MarshallingSupport.CHAR_TYPE) {
return this.dataIn.readChar();
}
if (type == MarshallingSupport.NULL) {
this.dataIn.reset();
throw new NullPointerException("Cannot convert NULL value to char.");
} else {
this.dataIn.reset();
throw new MessageFormatException(" not a char type");
}
} catch (NumberFormatException mfe) {
try {
this.dataIn.reset();
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
throw mfe;
} catch (EOFException e) {
throw JMSExceptionSupport.createMessageEOFException(e);
} catch (IOException e) {
throw JMSExceptionSupport.createMessageFormatException(e);
}
}
/**
* Reads a 32-bit integer from the stream message.
*
* @return a 32-bit integer value from the stream message, 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 message stream has been
* reached.
* @throws MessageFormatException if this type conversion is invalid.
* @throws MessageNotReadableException if the message is in write-only mode.
*/
@Override
public int readInt() throws JMSException {
initializeReading();
try {
this.dataIn.mark(33);
int type = this.dataIn.read();
if (type == -1) {
throw new MessageEOFException("reached end of data");
}
if (type == MarshallingSupport.INTEGER_TYPE) {
return this.dataIn.readInt();
}
if (type == MarshallingSupport.SHORT_TYPE) {
return this.dataIn.readShort();
}
if (type == MarshallingSupport.BYTE_TYPE) {
return this.dataIn.readByte();
}
if (type == MarshallingSupport.STRING_TYPE) {
return Integer.valueOf(this.dataIn.readUTF()).intValue();
}
if (type == MarshallingSupport.NULL) {
this.dataIn.reset();
throw new NullPointerException("Cannot convert NULL value to int.");
} else {
this.dataIn.reset();
throw new MessageFormatException(" not an int type");
}
} catch (NumberFormatException mfe) {
try {
this.dataIn.reset();
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
throw mfe;
} catch (EOFException e) {
throw JMSExceptionSupport.createMessageEOFException(e);
} catch (IOException e) {
throw JMSExceptionSupport.createMessageFormatException(e);
}
}
/**
* Reads a 64-bit integer from the stream message.
*
* @return a 64-bit integer value from the stream message, 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 message stream has been
* reached.
* @throws MessageFormatException if this type conversion is invalid.
* @throws MessageNotReadableException if the message is in write-only mode.
*/
@Override
public long readLong() throws JMSException {
initializeReading();
try {
this.dataIn.mark(65);
int type = this.dataIn.read();
if (type == -1) {
throw new MessageEOFException("reached end of data");
}
if (type == MarshallingSupport.LONG_TYPE) {
return this.dataIn.readLong();
}
if (type == MarshallingSupport.INTEGER_TYPE) {
return this.dataIn.readInt();
}
if (type == MarshallingSupport.SHORT_TYPE) {
return this.dataIn.readShort();
}
if (type == MarshallingSupport.BYTE_TYPE) {
return this.dataIn.readByte();
}
if (type == MarshallingSupport.STRING_TYPE) {
return Long.valueOf(this.dataIn.readUTF()).longValue();
}
if (type == MarshallingSupport.NULL) {
this.dataIn.reset();
throw new NullPointerException("Cannot convert NULL value to long.");
} else {
this.dataIn.reset();
throw new MessageFormatException(" not a long type");
}
} catch (NumberFormatException mfe) {
try {
this.dataIn.reset();
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
throw mfe;
} catch (EOFException e) {
throw JMSExceptionSupport.createMessageEOFException(e);
} catch (IOException e) {
throw JMSExceptionSupport.createMessageFormatException(e);
}
}
/**
* Reads a float from the stream message.
*
* @return a float value from the stream message
* @throws JMSException if the JMS provider fails to read the message due to
* some internal error.
* @throws MessageEOFException if unexpected end of message stream has been
* reached.
* @throws MessageFormatException if this type conversion is invalid.
* @throws MessageNotReadableException if the message is in write-only mode.
*/
@Override
public float readFloat() throws JMSException {
initializeReading();
try {
this.dataIn.mark(33);
int type = this.dataIn.read();
if (type == -1) {
throw new MessageEOFException("reached end of data");
}
if (type == MarshallingSupport.FLOAT_TYPE) {
return this.dataIn.readFloat();
}
if (type == MarshallingSupport.STRING_TYPE) {
return Float.valueOf(this.dataIn.readUTF()).floatValue();
}
if (type == MarshallingSupport.NULL) {
this.dataIn.reset();
throw new NullPointerException("Cannot convert NULL value to float.");
} else {
this.dataIn.reset();
throw new MessageFormatException(" not a float type");
}
} catch (NumberFormatException mfe) {
try {
this.dataIn.reset();
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
throw mfe;
} catch (EOFException e) {
throw JMSExceptionSupport.createMessageEOFException(e);
} catch (IOException e) {
throw JMSExceptionSupport.createMessageFormatException(e);
}
}
/**
* Reads a double from the stream message.
*
* @return a double value from the stream message
* @throws JMSException if the JMS provider fails to read the message due to
* some internal error.
* @throws MessageEOFException if unexpected end of message stream has been
* reached.
* @throws MessageFormatException if this type conversion is invalid.
* @throws MessageNotReadableException if the message is in write-only mode.
*/
@Override
public double readDouble() throws JMSException {
initializeReading();
try {
this.dataIn.mark(65);
int type = this.dataIn.read();
if (type == -1) {
throw new MessageEOFException("reached end of data");
}
if (type == MarshallingSupport.DOUBLE_TYPE) {
return this.dataIn.readDouble();
}
if (type == MarshallingSupport.FLOAT_TYPE) {
return this.dataIn.readFloat();
}
if (type == MarshallingSupport.STRING_TYPE) {
return Double.valueOf(this.dataIn.readUTF()).doubleValue();
}
if (type == MarshallingSupport.NULL) {
this.dataIn.reset();
throw new NullPointerException("Cannot convert NULL value to double.");
} else {
this.dataIn.reset();
throw new MessageFormatException(" not a double type");
}
} catch (NumberFormatException mfe) {
try {
this.dataIn.reset();
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
throw mfe;
} catch (EOFException e) {
throw JMSExceptionSupport.createMessageEOFException(e);
} catch (IOException e) {
throw JMSExceptionSupport.createMessageFormatException(e);
}
}
/**
* Reads a String from the stream message.
*
* @return a Unicode string from the stream message
* @throws JMSException if the JMS provider fails to read the message due to
* some internal error.
* @throws MessageEOFException if unexpected end of message stream has been
* reached.
* @throws MessageFormatException if this type conversion is invalid.
* @throws MessageNotReadableException if the message is in write-only mode.
*/
@Override
public String readString() throws JMSException {
initializeReading();
try {
this.dataIn.mark(65);
int type = this.dataIn.read();
if (type == -1) {
throw new MessageEOFException("reached end of data");
}
if (type == MarshallingSupport.NULL) {
return null;
}
if (type == MarshallingSupport.BIG_STRING_TYPE) {
return MarshallingSupport.readUTF8(dataIn);
}
if (type == MarshallingSupport.STRING_TYPE) {
return this.dataIn.readUTF();
}
if (type == MarshallingSupport.LONG_TYPE) {
return new Long(this.dataIn.readLong()).toString();
}
if (type == MarshallingSupport.INTEGER_TYPE) {
return new Integer(this.dataIn.readInt()).toString();
}
if (type == MarshallingSupport.SHORT_TYPE) {
return new Short(this.dataIn.readShort()).toString();
}
if (type == MarshallingSupport.BYTE_TYPE) {
return new Byte(this.dataIn.readByte()).toString();
}
if (type == MarshallingSupport.FLOAT_TYPE) {
return new Float(this.dataIn.readFloat()).toString();
}
if (type == MarshallingSupport.DOUBLE_TYPE) {
return new Double(this.dataIn.readDouble()).toString();
}
if (type == MarshallingSupport.BOOLEAN_TYPE) {
return (this.dataIn.readBoolean() ? Boolean.TRUE : Boolean.FALSE).toString();
}
if (type == MarshallingSupport.CHAR_TYPE) {
return new Character(this.dataIn.readChar()).toString();
} else {
this.dataIn.reset();
throw new MessageFormatException(" not a String type");
}
} catch (NumberFormatException mfe) {
try {
this.dataIn.reset();
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
throw mfe;
} catch (EOFException e) {
throw JMSExceptionSupport.createMessageEOFException(e);
} catch (IOException e) {
throw JMSExceptionSupport.createMessageFormatException(e);
}
}
/**
* 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.
*
* @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 byte field has been reached
* @throws JMSException if the JMS provider fails to read the message due to
* some internal error.
* @throws MessageEOFException if unexpected end of message stream has been
* reached.
* @throws MessageFormatException if this type conversion is invalid.
* @throws MessageNotReadableException if the message is in write-only mode.
* @see #readObject()
*/
@Override
public int readBytes(byte[] value) throws JMSException {
initializeReading();
try {
if (value == null) {
throw new NullPointerException();
}
if (remainingBytes == -1) {
this.dataIn.mark(value.length + 1);
int type = this.dataIn.read();
if (type == -1) {
throw new MessageEOFException("reached end of data");
}
if (type != MarshallingSupport.BYTE_ARRAY_TYPE) {
throw new MessageFormatException("Not a byte array");
}
remainingBytes = this.dataIn.readInt();
} else if (remainingBytes == 0) {
remainingBytes = -1;
return -1;
}
if (value.length <= remainingBytes) {
// small buffer
remainingBytes -= value.length;
this.dataIn.readFully(value);
return value.length;
} else {
// big buffer
int rc = this.dataIn.read(value, 0, remainingBytes);
remainingBytes = 0;
return rc;
}
} catch (EOFException e) {
JMSException jmsEx = new MessageEOFException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
} catch (IOException e) {
JMSException jmsEx = new MessageFormatException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
}
/**
* 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.
*
* @return 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 JMSException if the JMS provider fails to read the message due to
* some internal error.
* @throws MessageEOFException if unexpected end of message stream has been
* reached.
* @throws MessageFormatException if this type conversion is invalid.
* @throws MessageNotReadableException if the message is in write-only mode.
* @see #readBytes(byte[] value)
*/
@Override
public Object readObject() throws JMSException {
initializeReading();
try {
this.dataIn.mark(65);
int type = this.dataIn.read();
if (type == -1) {
throw new MessageEOFException("reached end of data");
}
if (type == MarshallingSupport.NULL) {
return null;
}
if (type == MarshallingSupport.BIG_STRING_TYPE) {
return MarshallingSupport.readUTF8(dataIn);
}
if (type == MarshallingSupport.STRING_TYPE) {
return this.dataIn.readUTF();
}
if (type == MarshallingSupport.LONG_TYPE) {
return Long.valueOf(this.dataIn.readLong());
}
if (type == MarshallingSupport.INTEGER_TYPE) {
return Integer.valueOf(this.dataIn.readInt());
}
if (type == MarshallingSupport.SHORT_TYPE) {
return Short.valueOf(this.dataIn.readShort());
}
if (type == MarshallingSupport.BYTE_TYPE) {
return Byte.valueOf(this.dataIn.readByte());
}
if (type == MarshallingSupport.FLOAT_TYPE) {
return new Float(this.dataIn.readFloat());
}
if (type == MarshallingSupport.DOUBLE_TYPE) {
return new Double(this.dataIn.readDouble());
}
if (type == MarshallingSupport.BOOLEAN_TYPE) {
return this.dataIn.readBoolean() ? Boolean.TRUE : Boolean.FALSE;
}
if (type == MarshallingSupport.CHAR_TYPE) {
return Character.valueOf(this.dataIn.readChar());
}
if (type == MarshallingSupport.BYTE_ARRAY_TYPE) {
int len = this.dataIn.readInt();
byte[] value = new byte[len];
this.dataIn.readFully(value);
return value;
} else {
this.dataIn.reset();
throw new MessageFormatException("unknown type");
}
} catch (NumberFormatException mfe) {
try {
this.dataIn.reset();
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
throw mfe;
} catch (EOFException e) {
JMSException jmsEx = new MessageEOFException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
} catch (IOException e) {
JMSException jmsEx = new MessageFormatException(e.getMessage());
jmsEx.setLinkedException(e);
throw jmsEx;
}
}
/**
* 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.
*
* @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 {
MarshallingSupport.marshalBoolean(dataOut, value);
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
}
/**
* Writes a byte to the stream message.
*
* @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 {
MarshallingSupport.marshalByte(dataOut, value);
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
}
/**
* Writes a short to the stream message.
*
* @param value the short 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 writeShort(short value) throws JMSException {
initializeWriting();
try {
MarshallingSupport.marshalShort(dataOut, value);
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
}
/**
* Writes a char to the stream message.
*
* @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 {
MarshallingSupport.marshalChar(dataOut, value);
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
}
/**
* Writes an int to the stream message.
*
* @param value the int 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 writeInt(int value) throws JMSException {
initializeWriting();
try {
MarshallingSupport.marshalInt(dataOut, value);
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
}
/**
* Writes a long to the stream message.
*
* @param value the long 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 writeLong(long value) throws JMSException {
initializeWriting();
try {
MarshallingSupport.marshalLong(dataOut, value);
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
}
/**
* Writes a float to the stream message.
*
* @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 {
MarshallingSupport.marshalFloat(dataOut, value);
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
}
/**
* Writes a double to the stream message.
*
* @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 {
MarshallingSupport.marshalDouble(dataOut, value);
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
}
/**
* Writes a String to the stream message.
*
* @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 writeString(String value) throws JMSException {
initializeWriting();
try {
if (value == null) {
MarshallingSupport.marshalNull(dataOut);
} else {
MarshallingSupport.marshalString(dataOut, value);
}
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
}
/**
* 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.
*
* @param value the byte array 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 writeBytes(byte[] value) throws JMSException {
writeBytes(value, 0, value.length);
}
/**
* 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.
*
* @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 {
MarshallingSupport.marshalByteArray(dataOut, value, offset, length);
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
}
/**
* 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.
*
* @param value the Java object to be written
* @throws JMSException if the JMS provider fails to write the message due
* to some internal error.
* @throws MessageFormatException if the object is invalid.
* @throws MessageNotWriteableException if the message is in read-only mode.
*/
@Override
public void writeObject(Object value) throws JMSException {
initializeWriting();
if (value == null) {
try {
MarshallingSupport.marshalNull(dataOut);
} catch (IOException ioe) {
throw JMSExceptionSupport.create(ioe);
}
} else if (value instanceof String) {
writeString(value.toString());
} else if (value instanceof Character) {
writeChar(((Character)value).charValue());
} else if (value instanceof Boolean) {
writeBoolean(((Boolean)value).booleanValue());
} 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 Float) {
writeFloat(((Float)value).floatValue());
} else if (value instanceof Double) {
writeDouble(((Double)value).doubleValue());
} else if (value instanceof byte[]) {
writeBytes((byte[])value);
}else if (value instanceof Long) {
writeLong(((Long)value).longValue());
}else {
throw new MessageFormatException("Unsupported Object 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;
this.dataIn = null;
this.dataOut = null;
this.remainingBytes = -1;
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()) {
compressed = true;
os = new DeflaterOutputStream(os);
}
this.dataOut = new DataOutputStream(os);
}
// 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 {
if (compressed) {
ByteArrayInputStream input = new ByteArrayInputStream(this.content.getData(), this.content.getOffset(), this.content.getLength());
InflaterInputStream inflater = new InflaterInputStream(input);
try {
byte[] buffer = new byte[8*1024];
int read = 0;
while ((read = inflater.read(buffer)) != -1) {
this.dataOut.write(buffer, 0, read);
}
} finally {
inflater.close();
}
} else {
this.dataOut.write(this.content.getData(), this.content.getOffset(), this.content.getLength());
}
// Free up the buffer from the old content, will be re-written when
// tbe 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 MessageNotReadableException {
checkWriteOnlyBody();
if (this.dataIn == null) {
ByteSequence data = getContent();
if (data == null) {
data = new ByteSequence(new byte[] {}, 0, 0);
}
InputStream is = new ByteArrayInputStream(data);
if (isCompressed()) {
is = new InflaterInputStream(is);
is = new BufferedInputStream(is);
}
this.dataIn = new DataInputStream(is);
}
}
@Override
public void compress() throws IOException {
storeContent();
super.compress();
}
@Override
public String toString() {
return super.toString() + " ActiveMQStreamMessage{ " + "bytesOut = " + bytesOut + ", dataOut = " + dataOut + ", dataIn = " + dataIn + " }";
}
}