How to send a file to the ActiveMQ Queue? - apache-camel

Question

I have a simple Apache Camel route in JBoss FUSE:
<?xml version="1.0"?>
<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.osgi.org/xmlns/blueprint/v1.0.0 http://www.osgi.org/xmlns/blueprint/v1.0.0/blueprint.xsd
http://camel.apache.org/schema/blueprint http://camel.apache.org/schema/blueprint/camel-blueprint.xsd">
<bean id="startPolicy" class="org.apache.camel.routepolicy.quartz.CronScheduledRoutePolicy">
<property name="routeStartTime" value="*/3 * * * * ?"/>
</bean>
<bean id="activemq" class="org.apache.activemq.camel.component.ActiveMQComponent">
<property name="brokerURL" value="tcp://localhost:61616" />
<property name="userName" value="admin" />
<property name="password" value="admin" />
</bean>
<camelContext id="blueprintContext" trace="false" xmlns="http://camel.apache.org/schema/blueprint">
<route id="testRoute" routePolicyRef="startPolicy" autoStartup="false">
<from uri="activemq:source-queue?username=admin&password=admin"></from>
<log message="${body}" loggingLevel="INFO"></log>
<to uri="activemq:sink-queue?username=admin&password=admin"></to>
</route>
</camelContext>
</blueprint>
I can connect to the ActiveMQ broker and send a message to the queue, by using this standalone client:
public class MessageSender {
public static void main(String[] args) throws Exception {
ActiveMQConnectionFactory factory =
new ActiveMQConnectionFactory("tcp://localhost:61616");
factory.setUserName("admin");
factory.setPassword("admin");
Connection connection = factory.createConnection();
try {
Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
Queue queue = session.createQueue("source-queue");
MessageProducer producer = session.createProducer(queue);
Message message = session.createTextMessage("some message to queue...");
producer.send(message);
} finally {
connection.close();
}
}
}
From the logs I see, that messages is consumed from the queue and message bodies are displays in the log:
How to send a file to the ActiveMQ Queue? For example, I have a simple form with <input type="file"> encoded in multipart/form-data. By using this form I need to send a payload of POST request to the ActiveMQ Queue.
How can I do that?
I would be very grateful for the information.
Thanks to all.

Answer 1

#Mary Zheng provided an excellent example, how it may be done:
ActiveMQ File Transfer Example
Method of class QueueMessageProducer, that sends the file message to ActiveMQ Broker:
private void sendFileAsBytesMessage(File file) throws JMSException, IOException {
BytesMessage bytesMessage = session.createBytesMessage();
bytesMessage.setStringProperty("fileName", file.getName());
bytesMessage.writeBytes(fileManager.readfileAsBytes(file));
msgProducer.send(bytesMessage);
}
, where:
ConnectionFactory connFactory =
new ActiveMQConnectionFactory(username, password, activeMqBrokerUri);
Connection connection = connFactory.createConnection();
ActiveMQSession session =
(ActiveMQSession) connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
FileAsByteArrayManager class that performs a low-level operations with files:
public class FileAsByteArrayManager {
public byte[] readfileAsBytes(File file) throws IOException {
try (RandomAccessFile accessFile = new RandomAccessFile(file, "r")) {
byte[] bytes = new byte[(int) accessFile.length()];
accessFile.readFully(bytes);
return bytes;
}
}
public void writeFile(byte[] bytes, String fileName) throws IOException {
File file = new File(fileName);
try (RandomAccessFile accessFile = new RandomAccessFile(file, "rw")) {
accessFile.write(bytes);
}
}
}