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com.rabbitmq.jms.client.message.RMQStreamMessage Maven / Gradle / Ivy
/* Copyright (c) 2013 Pivotal Software, Inc. All rights reserved. */
package com.rabbitmq.jms.client.message;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.EOFException;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
import java.io.UTFDataFormatException;
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 com.rabbitmq.jms.client.RMQMessage;
import com.rabbitmq.jms.util.RMQJMSException;
import com.rabbitmq.jms.util.RMQMessageFormatException;
/* TODO For now we don't handle direct TCP streaming
* this should write to disk, and when we send the message
* we have disassemble into multiple messages and reassemble multiple messages
* on the other side
*/
/**
* Implements {@link StreamMessage} interface.
*/
public class RMQStreamMessage extends RMQMessage implements StreamMessage {
private static final byte[] EOF_ARRAY = new byte[0];
private volatile boolean reading;
private transient ObjectInputStream in;
private transient ByteArrayInputStream bin;
private transient ObjectOutputStream out;
private transient ByteArrayOutputStream bout;
private volatile transient byte[] buf;
private volatile transient byte[] readbuf = null;
public RMQStreamMessage() {
this(false);
}
private RMQStreamMessage(boolean reading) {
this.reading = reading;
if (!reading) {
this.bout = new ByteArrayOutputStream(RMQMessage.DEFAULT_MESSAGE_BODY_SIZE);
try {
this.out = new ObjectOutputStream(this.bout);
} catch (IOException x) {
throw new RuntimeException(x);
}
}
}
private void writePrimitive(Object value) throws JMSException {
if (this.reading || isReadonlyBody())
throw new MessageNotWriteableException(NOT_WRITEABLE);
try {
RMQMessage.writePrimitive(value, this.out);
} catch (IOException x) {
throw new RMQJMSException(x);
}
}
private Object readPrimitiveType(Class type) throws JMSException {
if (!this.reading)
throw new MessageNotReadableException(NOT_READABLE);
if (this.readbuf!=null) {
throw new MessageFormatException("You must call 'int readBytes(byte[])' since the buffer is not empty");
}
boolean success = true;
try {
this.bin.mark(0);
Object o = RMQMessage.readPrimitive(in);
if (o instanceof byte[]) {
if (type == ByteArray.class || type == Object.class) {
return o;
} else {
throw new MessageFormatException(String.format(UNABLE_TO_CAST, o, "byte[]"));
}
} else if (type == ByteArray.class) {
if (o==null) {
return null;
}
throw new MessageFormatException(String.format(UNABLE_TO_CAST, o, "byte[]"));
} else if (type == Boolean.class) {
if (o == null) {
return Boolean.FALSE;
} else if (o instanceof Boolean) {
return o;
} else if (o instanceof String) {
return Boolean.parseBoolean((String)o);
} else {
throw new MessageFormatException(String.format(UNABLE_TO_CAST, o, "boolean"));
}
} else if (type == Byte.class) {
if (o instanceof Byte) {
return o;
} else if (o instanceof String) {
return Byte.parseByte((String)o);
} else {
throw new MessageFormatException(String.format(UNABLE_TO_CAST, o, "byte"));
}
} else if (type == Short.class) {
if (o instanceof Byte) {
return (short) (Byte) o;
} else if (o instanceof Short) {
return o;
} else if (o instanceof String) {
return Short.parseShort((String)o);
} else {
throw new MessageFormatException(String.format(UNABLE_TO_CAST, o, "byte"));
}
} else if (type == Integer.class) {
if (o instanceof Byte) {
return (int) (Byte) o;
} else if (o instanceof Short) {
return (int) (Short) o;
} else if (o instanceof Integer){
return o;
} else if (o instanceof String) {
return Integer.parseInt((String)o);
} else {
throw new MessageFormatException(String.format(UNABLE_TO_CAST, o, "int"));
}
} else if (type == Character.class) {
if (o instanceof Character) {
return o;
} else {
throw new MessageFormatException(String.format(UNABLE_TO_CAST, o, "char"));
}
} else if (type == Long.class) {
if (o instanceof Byte) {
return (long) (Byte) o;
} else if (o instanceof Short) {
return (long) (Short) o;
} else if (o instanceof Integer){
return (long) (Integer) o;
} else if (o instanceof Long){
return o;
} else if (o instanceof String) {
return Long.parseLong((String)o);
} else {
throw new MessageFormatException(String.format(UNABLE_TO_CAST, o, "long"));
}
} else if (type == Float.class) {
if (o instanceof Float) {
return (Float) o;
} else if (o instanceof String) {
return Float.parseFloat((String)o);
} else {
throw new MessageFormatException(String.format(UNABLE_TO_CAST, o, "float"));
}
} else if (type == Double.class) {
if (o instanceof Float) {
return (double) (Float) o;
} else if (o instanceof Double) {
return (Double) o;
} else if (o instanceof String) {
return Double.parseDouble((String)o);
} else {
throw new MessageFormatException(String.format(UNABLE_TO_CAST, o, "double"));
}
} else if (type == String.class) {
if (o == null) {
return null;
} else if (o instanceof byte[]) {
throw new MessageFormatException(String.format(UNABLE_TO_CAST, o, "String"));
} else {
return o.toString();
}
} else if (type == Object.class) {
return o;
} else {
throw new MessageFormatException(String.format(UNABLE_TO_CAST, o, type.toString()));
}
} catch (NumberFormatException x) {
success = false;
throw x;
} catch (ClassNotFoundException x) {
success = false;
throw new RMQJMSException(x);
} catch (EOFException x) {
success = false;
throw new MessageEOFException(MSG_EOF);
} catch (UTFDataFormatException x) {
success = false;
throw new RMQMessageFormatException(x);
} catch (IOException x) {
success = false;
throw new RMQJMSException(x);
} catch (Exception x) {
success = false;
if (x instanceof JMSException) {
throw (JMSException)x;
} else {
throw new RMQJMSException(x);
}
} finally {
if (!success) {
this.bin.reset();
}
}
}
/**
* {@inheritDoc}
*/
@Override
public boolean readBoolean() throws JMSException {
return (Boolean)this.readPrimitiveType(Boolean.class);
}
/**
* {@inheritDoc}
*/
@Override
public byte readByte() throws JMSException {
return (Byte)this.readPrimitiveType(Byte.class);
}
/**
* {@inheritDoc}
*/
@Override
public short readShort() throws JMSException {
return (Short)this.readPrimitiveType(Short.class);
}
/**
* {@inheritDoc}
*/
@Override
public char readChar() throws JMSException {
return (Character)this.readPrimitiveType(Character.class);
}
/**
* {@inheritDoc}
*/
@Override
public int readInt() throws JMSException {
return (Integer)this.readPrimitiveType(Integer.class);
}
/**
* {@inheritDoc}
*/
@Override
public long readLong() throws JMSException {
return (Long)this.readPrimitiveType(Long.class);
}
/**
* {@inheritDoc}
*/
@Override
public float readFloat() throws JMSException {
return (Float)this.readPrimitiveType(Float.class);
}
/**
* {@inheritDoc}
*/
@Override
public double readDouble() throws JMSException {
return (Double)this.readPrimitiveType(Double.class);
}
/**
* {@inheritDoc}
*/
@Override
public String readString() throws JMSException {
return (String)this.readPrimitiveType(String.class);
}
/**
* {@inheritDoc}
*/
@Override
public int readBytes(byte[] value) throws JMSException {
if (readbuf==null) {
readbuf = (byte[])this.readPrimitiveType(ByteArray.class);
if (readbuf==null) return -1;
}
if (readbuf!=null) {
if (readbuf==EOF_ARRAY) {
readbuf = null;
return -1;
} else if (readbuf.length > value.length) {
int result = value.length;
int diff = readbuf.length - result;
System.arraycopy(readbuf, 0, value, 0, result);
byte[] tmp = new byte[diff];
System.arraycopy(readbuf, result, tmp, 0, diff);
readbuf = tmp;
return result;
} else {
int result = Math.min(readbuf.length, value.length);
System.arraycopy(readbuf, 0, value, 0, result);
readbuf = (result==value.length) ? EOF_ARRAY : null;
return result;
}
} else {
throw new MessageFormatException(String.format(UNABLE_TO_CAST, null,"byte[]"));
}
}
/**
* reads an object from the stream that was used to serialize this message
* @return the object read
* @throws JMSException if a deserialization exception happens
*/
@Override
public Object readObject() throws JMSException {
return this.readPrimitiveType(Object.class);
}
/**
* {@inheritDoc}
*/
@Override
public void writeBoolean(boolean value) throws JMSException {
writePrimitive(value);
}
/**
* {@inheritDoc}
*/
@Override
public void writeByte(byte value) throws JMSException {
writePrimitive(value);
}
/**
* {@inheritDoc}
*/
@Override
public void writeShort(short value) throws JMSException {
writePrimitive(value);
}
/**
* {@inheritDoc}
*/
@Override
public void writeChar(char value) throws JMSException {
writePrimitive(value);
}
/**
* {@inheritDoc}
*/
@Override
public void writeInt(int value) throws JMSException {
writePrimitive(value);
}
/**
* {@inheritDoc}
*/
@Override
public void writeLong(long value) throws JMSException {
writePrimitive(value);
}
/**
* {@inheritDoc}
*/
@Override
public void writeFloat(float value) throws JMSException {
writePrimitive(value);
}
/**
* {@inheritDoc}
*/
@Override
public void writeDouble(double value) throws JMSException {
writePrimitive(value);
}
/**
* {@inheritDoc}
*/
@Override
public void writeString(String value) throws JMSException {
writePrimitive(value);
}
/**
* {@inheritDoc}
*/
@Override
public void writeBytes(byte[] value) throws JMSException {
writePrimitive(value);
}
/**
* {@inheritDoc}
*/
@Override
public void writeBytes(byte[] value, int offset, int length) throws JMSException {
byte[] buf = new byte[length];
System.arraycopy(value, offset, buf, 0, length);
writePrimitive(buf);
}
/**
* {@inheritDoc}
*/
@Override
public void writeObject(Object value) throws JMSException {
writeObject(value,false);
}
private void writeObject(Object value, boolean allowSerializable) throws JMSException {
if (this.reading || isReadonlyBody())
throw new MessageNotWriteableException(NOT_WRITEABLE);
try {
RMQMessage.writePrimitive(value, this.out, allowSerializable);
} catch (IOException x) {
throw new RMQJMSException(x);
}
}
/**
* {@inheritDoc}
*/
@Override
public void reset() throws JMSException {
this.readbuf = null;
if (this.reading) {
//if we already are reading, all we want to do is reset to the
//beginning of the stream
try {
this.bin = new ByteArrayInputStream(buf);
this.in = new ObjectInputStream(this.bin);
} catch (IOException x) {
throw new RMQJMSException(x);
}
} else {
try {
buf = null;
if (this.out != null) {
this.out.flush();
buf = this.bout.toByteArray();
} else {
buf = new byte[0];
}
this.bin = new ByteArrayInputStream(buf);
this.in = new ObjectInputStream(this.bin);
} catch (IOException x) {
throw new RMQJMSException(x);
}
this.reading = true;
this.out = null;
this.bout = null;
}
}
/**
* {@inheritDoc}
*/
@Override
public void clearBodyInternal() throws JMSException {
this.bout = new ByteArrayOutputStream(RMQMessage.DEFAULT_MESSAGE_BODY_SIZE);
try {
this.out = new ObjectOutputStream(this.bout);
} catch (IOException x) {
throw new RMQJMSException(x);
}
this.bin = null;
this.in = null;
this.buf = null;
this.readbuf = null;
this.reading = false;
}
/**
* {@inheritDoc}
*/
@Override
protected void writeBody(ObjectOutput out, ByteArrayOutputStream bout) throws IOException {
this.out.flush();
byte[] buf = this.bout.toByteArray();
out.writeInt(buf.length);
out.write(buf);
}
/**
* {@inheritDoc}
*/
@Override
protected void readBody(ObjectInput inputStream, ByteArrayInputStream bin) throws IOException, ClassNotFoundException {
int len = inputStream.readInt();
buf = new byte[len];
inputStream.read(buf);
this.reading = true;
this.bin = new ByteArrayInputStream(buf);
this.in = new ObjectInputStream(this.bin);
}
@Override
protected void readAmqpBody(byte[] barr) {
throw new UnsupportedOperationException();
}
private static class ByteArray {
}
@Override
protected void writeAmqpBody(ByteArrayOutputStream out) throws IOException {
throw new UnsupportedOperationException();
}
public static final RMQMessage recreate(StreamMessage msg) throws JMSException {
RMQStreamMessage rmqSMsg = new RMQStreamMessage();
RMQMessage.copyAttributes(rmqSMsg, msg);
msg.reset(); // reset to beginning
boolean endOfStream = false;
while(!endOfStream) {
try {
rmqSMsg.writeObject(msg.readObject());
} catch (MessageEOFException e) {
endOfStream = true;
}
}
return rmqSMsg;
}
}
