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A pure Java JMS Camel Component
/**
* 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.camel.component.sjms;
import java.io.ByteArrayOutputStream;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import javax.jms.BytesMessage;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.MapMessage;
import javax.jms.Message;
import javax.jms.ObjectMessage;
import javax.jms.Session;
import javax.jms.StreamMessage;
import javax.jms.TextMessage;
import org.apache.camel.Endpoint;
import org.apache.camel.Exchange;
import org.apache.camel.RuntimeCamelException;
import org.apache.camel.component.sjms.jms.DefaultJmsKeyFormatStrategy;
import org.apache.camel.component.sjms.jms.IllegalHeaderException;
import org.apache.camel.component.sjms.jms.JmsConstants;
import org.apache.camel.component.sjms.jms.JmsMessageHeaderType;
import org.apache.camel.component.sjms.jms.JmsMessageHelper;
import org.apache.camel.component.sjms.jms.JmsMessageType;
import org.apache.camel.component.sjms.jms.KeyFormatStrategy;
import org.apache.camel.impl.DefaultMessage;
import org.apache.camel.util.ExchangeHelper;
import org.apache.camel.util.ObjectHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static org.apache.camel.component.sjms.SjmsConstants.JMS_MESSAGE_TYPE;
import static org.apache.camel.component.sjms.SjmsConstants.QUEUE_PREFIX;
import static org.apache.camel.component.sjms.SjmsConstants.TOPIC_PREFIX;
import static org.apache.camel.util.ObjectHelper.removeStartingCharacters;
public final class SjmsExchangeMessageHelper {
private static final Logger LOGGER = LoggerFactory.getLogger(SjmsExchangeMessageHelper.class);
private SjmsExchangeMessageHelper() {
}
public static Exchange createExchange(Message message, Endpoint endpoint) {
Exchange exchange = endpoint.createExchange();
return populateExchange(message, exchange, false);
}
@SuppressWarnings("unchecked")
public static Exchange populateExchange(Message message, Exchange exchange, boolean out) {
try {
SjmsExchangeMessageHelper.setJmsMessageHeaders(message, exchange, out);
if (message != null) {
// convert to JMS Message of the given type
DefaultMessage bodyMessage = null;
if (out) {
bodyMessage = (DefaultMessage) exchange.getOut();
} else {
bodyMessage = (DefaultMessage) exchange.getIn();
}
switch (JmsMessageHelper.discoverJmsMessageType(message)) {
case Bytes:
BytesMessage bytesMessage = (BytesMessage) message;
if (bytesMessage.getBodyLength() > Integer.MAX_VALUE) {
LOGGER.warn("Length of BytesMessage is too long: {}", bytesMessage.getBodyLength());
return null;
}
byte[] result = new byte[(int) bytesMessage.getBodyLength()];
bytesMessage.readBytes(result);
bodyMessage.setHeader(JMS_MESSAGE_TYPE, JmsMessageType.Bytes);
bodyMessage.setBody(result);
break;
case Map:
Map body = new HashMap();
MapMessage mapMessage = (MapMessage) message;
Enumeration names = mapMessage.getMapNames();
while (names.hasMoreElements()) {
String key = names.nextElement();
Object value = mapMessage.getObject(key);
body.put(key, value);
}
bodyMessage.setHeader(JMS_MESSAGE_TYPE, JmsMessageType.Map);
bodyMessage.setBody(body);
break;
case Object:
ObjectMessage objMsg = (ObjectMessage) message;
bodyMessage.setHeader(JMS_MESSAGE_TYPE, JmsMessageType.Object);
bodyMessage.setBody(objMsg.getObject());
break;
case Text:
TextMessage textMsg = (TextMessage) message;
bodyMessage.setHeader(JMS_MESSAGE_TYPE, JmsMessageType.Text);
bodyMessage.setBody(textMsg.getText());
break;
case Stream:
StreamMessage streamMessage = (StreamMessage) message;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
int next = streamMessage.readByte();
while (next > -1) {
baos.write(next);
next = streamMessage.readByte();
}
baos.flush();
bodyMessage.setHeader(JMS_MESSAGE_TYPE, JmsMessageType.Bytes);
bodyMessage.setBody(baos.toByteArray());
break;
case Message:
default:
// Do nothing. Only set the headers for an empty message
bodyMessage.setBody(message);
break;
}
}
} catch (Exception e) {
exchange.setException(e);
}
return exchange;
}
/**
* Removes the property from the JMS message.
*
* @param jmsMessage the JMS message
* @param name name of the property to remove
* @return the old value of the property or null if not exists
* @throws JMSException can be thrown
*/
public static Object removeJmsProperty(Message jmsMessage, String name) throws JMSException {
// check if the property exists
if (!jmsMessage.propertyExists(name)) {
return null;
}
Object answer = null;
// store the properties we want to keep in a temporary map
// as the JMS API is a bit strict as we are not allowed to
// clear a single property, but must clear them all and redo
// the properties
Map map = new LinkedHashMap();
Enumeration en = jmsMessage.getPropertyNames();
while (en.hasMoreElements()) {
String key = (String) en.nextElement();
if (name.equals(key)) {
answer = key;
} else {
map.put(key, jmsMessage.getObjectProperty(key));
}
}
// redo the properties to keep
jmsMessage.clearProperties();
for (Entry entry : map.entrySet()) {
jmsMessage.setObjectProperty(entry.getKey(), entry.getValue());
}
return answer;
}
/**
* Tests whether a given property with the name exists
*
* @param jmsMessage the JMS message
* @param name name of the property to test if exists
* @return true if the property exists, false if not.
* @throws JMSException can be thrown
*/
public static boolean hasProperty(Message jmsMessage, String name) throws JMSException {
Enumeration en = jmsMessage.getPropertyNames();
while (en.hasMoreElements()) {
String key = (String) en.nextElement();
if (name.equals(key)) {
return true;
}
}
return false;
}
/**
* Sets the property on the given JMS message.
*
* @param jmsMessage the JMS message
* @param name name of the property to set
* @param value the value
* @throws JMSException can be thrown
*/
public static void setProperty(Message jmsMessage, String name, Object value) throws JMSException {
if (value == null) {
return;
}
if (value instanceof Byte) {
jmsMessage.setByteProperty(name, (Byte) value);
} else if (value instanceof Boolean) {
jmsMessage.setBooleanProperty(name, (Boolean) value);
} else if (value instanceof Double) {
jmsMessage.setDoubleProperty(name, (Double) value);
} else if (value instanceof Float) {
jmsMessage.setFloatProperty(name, (Float) value);
} else if (value instanceof Integer) {
jmsMessage.setIntProperty(name, (Integer) value);
} else if (value instanceof Long) {
jmsMessage.setLongProperty(name, (Long) value);
} else if (value instanceof Short) {
jmsMessage.setShortProperty(name, (Short) value);
} else if (value instanceof String) {
jmsMessage.setStringProperty(name, (String) value);
} else {
// fallback to Object
jmsMessage.setObjectProperty(name, value);
}
}
/**
* Sets the correlation id on the JMS message.
*
* Will ignore exception thrown
*
* @param message the JMS message
* @param correlationId the correlation id
*/
public static void setCorrelationId(Message message, String correlationId) {
try {
message.setJMSCorrelationID(correlationId);
} catch (JMSException e) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Error setting the correlationId: {}", correlationId);
}
}
}
/**
* Normalizes the destination name, by removing any leading queue or topic
* prefixes.
*
* @param destination the destination
* @return the normalized destination
*/
public static String normalizeDestinationName(String destination) {
if (ObjectHelper.isEmpty(destination)) {
return destination;
}
if (destination.startsWith(QUEUE_PREFIX)) {
return removeStartingCharacters(destination.substring(QUEUE_PREFIX.length()), '/');
} else if (destination.startsWith(TOPIC_PREFIX)) {
return removeStartingCharacters(destination.substring(TOPIC_PREFIX.length()), '/');
} else {
return destination;
}
}
/**
* Sets the JMSReplyTo on the message.
*
* @param message the message
* @param replyTo the reply to destination
*/
public static void setJMSReplyTo(Message message, Destination replyTo) {
try {
message.setJMSReplyTo(replyTo);
} catch (Exception e) {
LOGGER.debug("Error setting the correlationId: {}", replyTo.toString());
}
}
/**
* Gets the JMSReplyTo from the message.
*
* @param message the message
* @return the reply to, can be null
*/
public static Destination getJMSReplyTo(Message message) {
try {
return message.getJMSReplyTo();
} catch (Exception e) {
// ignore due OracleAQ does not support accessing JMSReplyTo
}
return null;
}
/**
* Gets the JMSType from the message.
*
* @param message the message
* @return the type, can be null
*/
public static String getJMSType(Message message) {
try {
return message.getJMSType();
} catch (Exception e) {
// ignore due OracleAQ does not support accessing JMSType
}
return null;
}
/**
* Gets the JMSRedelivered from the message.
*
* @param message the message
* @return true if redelivered, false if not,
* null if not able to determine
*/
public static Boolean getJMSRedelivered(Message message) {
try {
return message.getJMSRedelivered();
} catch (Exception e) {
// ignore if JMS broker do not support this
}
return null;
}
/**
* Sets the JMSDeliveryMode on the message.
*
* @param exchange the exchange
* @param message the message
* @param deliveryMode the delivery mode, either as a String or integer
* @throws javax.jms.JMSException is thrown if error setting the delivery
* mode
*/
public static void setJMSDeliveryMode(Exchange exchange, Message message, Object deliveryMode) throws JMSException {
Integer mode = null;
if (deliveryMode instanceof String) {
String s = (String) deliveryMode;
if ("PERSISTENT".equalsIgnoreCase(s)) {
mode = DeliveryMode.PERSISTENT;
} else if ("NON_PERSISTENT".equalsIgnoreCase(s)) {
mode = DeliveryMode.NON_PERSISTENT;
} else {
// it may be a number in the String so try that
Integer value = ExchangeHelper.convertToType(exchange, Integer.class, deliveryMode);
if (value != null) {
mode = value;
} else {
throw new IllegalArgumentException("Unknown delivery mode with value: " + deliveryMode);
}
}
} else {
// fallback and try to convert to a number
Integer value = ExchangeHelper.convertToType(exchange, Integer.class, deliveryMode);
if (value != null) {
mode = value;
}
}
if (mode != null) {
message.setJMSDeliveryMode(mode);
message.setIntProperty(JmsConstants.JMS_DELIVERY_MODE, mode);
}
}
public static Message setJmsMessageHeaders(final Exchange exchange, final Message jmsMessage) throws Exception {
Map headers = new HashMap(exchange.getIn().getHeaders());
Set keys = headers.keySet();
for (String headerName : keys) {
Object headerValue = headers.get(headerName);
if (headerName.equalsIgnoreCase("JMSCorrelationID")) {
jmsMessage.setJMSCorrelationID(ExchangeHelper.convertToType(exchange, String.class, headerValue));
} else if (headerName.equalsIgnoreCase("JMSReplyTo") && headerValue != null) {
if (headerValue instanceof String) {
// if the value is a String we must normalize it first
headerValue = headerValue;
} else {
// TODO write destination converter
// Destination replyTo =
// ExchangeHelper.convertToType(exchange, Destination.class,
// headerValue);
// jmsMessage.setJMSReplyTo(replyTo);
}
} else if (headerName.equalsIgnoreCase("JMSType")) {
jmsMessage.setJMSType(ExchangeHelper.convertToType(exchange, String.class, headerValue));
} else if (headerName.equalsIgnoreCase("JMSPriority")) {
jmsMessage.setJMSPriority(ExchangeHelper.convertToType(exchange, Integer.class, headerValue));
} else if (headerName.equalsIgnoreCase("JMSDeliveryMode")) {
SjmsExchangeMessageHelper.setJMSDeliveryMode(exchange, jmsMessage, headerValue);
} else if (headerName.equalsIgnoreCase("JMSExpiration")) {
jmsMessage.setJMSExpiration(ExchangeHelper.convertToType(exchange, Long.class, headerValue));
} else {
// The following properties are set by the MessageProducer:
// JMSDestination
// The following are set on the underlying JMS provider:
// JMSMessageID, JMSTimestamp, JMSRedelivered
// log at trace level to not spam log
LOGGER.trace("Ignoring JMS header: {} with value: {}", headerName, headerValue);
if (headerName.equalsIgnoreCase("JMSDestination") || headerName.equalsIgnoreCase("JMSMessageID") || headerName.equalsIgnoreCase("JMSTimestamp")
|| headerName.equalsIgnoreCase("JMSRedelivered")) {
// The following properties are set by the MessageProducer:
// JMSDestination
// The following are set on the underlying JMS provider:
// JMSMessageID, JMSTimestamp, JMSRedelivered
// log at trace level to not spam log
LOGGER.trace("Ignoring JMS header: {} with value: {}", headerName, headerValue);
} else {
if (!(headerValue instanceof JmsMessageType)) {
String encodedName = new DefaultJmsKeyFormatStrategy().encodeKey(headerName);
SjmsExchangeMessageHelper.setProperty(jmsMessage, encodedName, headerValue);
}
}
}
}
return jmsMessage;
}
@SuppressWarnings("unchecked")
public static Exchange setJmsMessageHeaders(final Message jmsMessage, final Exchange exchange, boolean out) throws JMSException {
Map headers = new HashMap();
if (jmsMessage != null) {
// lets populate the standard JMS message headers
try {
headers.put(JmsMessageHeaderType.JMSCorrelationID.toString(), jmsMessage.getJMSCorrelationID());
headers.put(JmsMessageHeaderType.JMSDeliveryMode.toString(), jmsMessage.getJMSDeliveryMode());
headers.put(JmsMessageHeaderType.JMSDestination.toString(), jmsMessage.getJMSDestination());
headers.put(JmsMessageHeaderType.JMSExpiration.toString(), jmsMessage.getJMSExpiration());
headers.put(JmsMessageHeaderType.JMSMessageID.toString(), jmsMessage.getJMSMessageID());
headers.put(JmsMessageHeaderType.JMSPriority.toString(), jmsMessage.getJMSPriority());
headers.put(JmsMessageHeaderType.JMSRedelivered.toString(), jmsMessage.getJMSRedelivered());
headers.put(JmsMessageHeaderType.JMSTimestamp.toString(), jmsMessage.getJMSTimestamp());
headers.put(JmsMessageHeaderType.JMSReplyTo.toString(), SjmsExchangeMessageHelper.getJMSReplyTo(jmsMessage));
headers.put(JmsMessageHeaderType.JMSType.toString(), SjmsExchangeMessageHelper.getJMSType(jmsMessage));
// this works around a bug in the ActiveMQ property handling
headers.put(JmsMessageHeaderType.JMSXGroupID.toString(), jmsMessage.getStringProperty(JmsMessageHeaderType.JMSXGroupID.toString()));
} catch (JMSException e) {
throw new RuntimeCamelException(e);
}
for (Enumeration enumeration = jmsMessage.getPropertyNames(); enumeration.hasMoreElements();) {
String key = enumeration.nextElement();
if (hasIllegalHeaderKey(key)) {
throw new IllegalHeaderException("Header " + key + " is not a legal JMS header name value");
}
Object value = jmsMessage.getObjectProperty(key);
headers.put(key, value);
}
}
if (out) {
exchange.getOut().setHeaders(headers);
} else {
exchange.getIn().setHeaders(headers);
}
return exchange;
}
public static Message createMessage(Exchange exchange, Session session, KeyFormatStrategy keyFormatStrategy) throws Exception {
Message answer = null;
Object body = null;
Map bodyHeaders = null;
if (exchange.getOut().getBody() != null) {
body = exchange.getOut().getBody();
bodyHeaders = new HashMap(exchange.getOut().getHeaders());
} else {
body = exchange.getIn().getBody();
bodyHeaders = new HashMap(exchange.getIn().getHeaders());
}
answer = JmsMessageHelper.createMessage(session, body, bodyHeaders, keyFormatStrategy);
return answer;
}
private static boolean hasIllegalHeaderKey(String key) {
if (key == null) {
return true;
}
if (key.equals("")) {
return true;
}
if (key.indexOf(".") > -1) {
return true;
}
if (key.indexOf("-") > -1) {
return true;
}
return false;
}
}
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