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package org.apache.camel.component.jms; |
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import org.apache.camel.Exchange; |
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import javax.jms.BytesMessage; |
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import javax.jms.JMSException; |
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import javax.jms.MapMessage; |
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import javax.jms.Message; |
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import javax.jms.ObjectMessage; |
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import javax.jms.Session; |
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import javax.jms.StreamMessage; |
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import javax.jms.TextMessage; |
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import java.io.Serializable; |
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import java.util.Enumeration; |
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import java.util.HashMap; |
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import java.util.Map; |
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import java.util.Set; |
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public class JmsBinding { |
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public Object extractBodyFromJms(JmsExchange exchange, Message message) { |
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try { |
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if (message instanceof ObjectMessage) { |
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ObjectMessage objectMessage = (ObjectMessage) message; |
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return objectMessage.getObject(); |
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} |
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else if (message instanceof TextMessage) { |
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TextMessage textMessage = (TextMessage) message; |
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return textMessage.getText(); |
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} |
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else if (message instanceof MapMessage) { |
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return createMapFromMapMessage((MapMessage) message); |
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} |
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else if (message instanceof BytesMessage || message instanceof StreamMessage) { |
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return message; |
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} |
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else { |
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return null; |
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} |
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} |
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catch (JMSException e) { |
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throw new RuntimeJmsException("Failed to extract body due to: " + e + ". Message: " + message, e); |
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} |
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} |
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public Message makeJmsMessage(Exchange exchange, Session session) throws JMSException { |
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Message answer = createJmsMessage(exchange.getIn().getBody(), session); |
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appendJmsProperties(answer, exchange, session); |
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return answer; |
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} |
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protected void appendJmsProperties(Message jmsMessage, Exchange exchange, Session session) throws JMSException { |
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org.apache.camel.Message in = exchange.getIn(); |
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Set<Map.Entry<String, Object>> entries = in.getHeaders().entrySet(); |
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for (Map.Entry<String, Object> entry : entries) { |
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String headerName = entry.getKey(); |
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Object headerValue = entry.getValue(); |
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if (shouldOutputHeader(in, headerName, headerValue)) { |
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jmsMessage.setObjectProperty(headerName, headerValue); |
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} |
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} |
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} |
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protected Message createJmsMessage(Object body, Session session) throws JMSException { |
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if (body instanceof String) { |
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return session.createTextMessage((String) body); |
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} |
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else if (body instanceof Serializable) { |
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return session.createObjectMessage((Serializable) body); |
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} |
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else { |
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return session.createMessage(); |
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} |
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} |
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public Map<String, Object> createMapFromMapMessage(MapMessage message) throws JMSException { |
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Map<String, Object> answer = new HashMap<String, Object>(); |
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Enumeration names = message.getPropertyNames(); |
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while (names.hasMoreElements()) { |
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String name = names.nextElement().toString(); |
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Object value = message.getObject(name); |
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answer.put(name, value); |
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} |
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return answer; |
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} |
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protected boolean shouldOutputHeader(org.apache.camel.Message camelMessage, String headerName, Object headerValue) { |
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return true; |
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} |
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} |