I'm facing this problem while working with WSO2 ESB:
I need to transform a RPC-encoded message which includes a byte array into a new MTOM-based message which contains the ID of that byte array and the binary file as an attachment.
I'd to know if there's any mediator in the ESB to accomplish this task or if I need to create my own procedure.
Thank you!
Maybe you should just copy binary data from source message binary field into a target message binary field and enable MTOM in the proxy QoS.
Let me now if if works.
Related
I've just successfully implemented a JMS-message-processor in my WSO2-process. However, when logged in as an admin on the ActiveMQ console, I can view the stats of the queue but I cannot access the contents of the pending message. Instead, I see this error:
Cannot display ObjectMessage body. Reason: Failed to build body from content. Serializable class not available to broker. Reason: java.lang.ClassNotFoundException: org.apache.synapse.message.store.impl.commons.StorableMessage
Accessing the contents of a pending message is possible when using the RabbitMQ, so I figured it should also be possible with this message broker.
I've found solutions online, but they don't seem to be working, or perhaps they're out of date. Can somebody point me to the correct answer to solve this? I'm on WSO2 Integration Studio 8.1.0 and am using ActiveMQ 5.17.1.
It appears that WSO2 is using javax.jms.ObjectMessage despite the fact that there's a long list of reasons why doing so is a bad idea, including the issue you're currently facing, but I digress.
The problem here is that the implementation of the javax.jms.ObjectMessage (i.e. org.apache.synapse.message.store.impl.commons.StorableMessage in this case) must be on the classpath of any application which wants to deserialize that message. This class is not, in fact, on the classpath of ActiveMQ therefore the ActiveMQ web console cannot deserialize the message and display its contents (assuming those contents are human-readable in the first place). That's why a ClassNotFoundException is thrown.
You may be able to resolve the issue by putting org.apache.synapse.message.store.impl.commons.StorableMessage on ActiveMQ's classpath. Aside from that there's really nothing to be done.
I assume this is different for RabbitMQ because in that case WSO2 doesn't use the JMS API and uses the AMQP protocol which is not Java-centric like JMS.
Justin has explained the cause of the issue and as suggested you can try adding the class to ActiveMQ runtime and see whether it resolves the issue. This class is located in the Synapse-Core(synapse-core_2.x.x.wso2vXXX.jar). But remember although this may resolve the ActiveMQ UI issue, this message is not consumable by other systems unless they know how to deserialize it.
Let me add more details on why the message is serialized. Message serialization happens when you use the Store mediator, and when you store a message with Store Mediator it is intended to be only read by a Message Processor. Simply the serialized message can only be consumed by WSO2 Message Processors. In other words, Store Mediator and the Message processors are tightly coupled.
If message serialization is an issue for you. For example, if other systems are consuming the messages that WSO2 publishes you can try using the JMS transport to produce and to consume messages from ActiveMQ. Other than that you can also consider using JMS Inbound Endpoint to consume messages, which all use standard media types when storing the message.
I created a service consumer through the wizard, based on a WSDL. Proxy object is generated, all structures and methods are found. Then, I add a logical port through SOAMANAGER - all fine, it pings and the connection works.
I populate the input structure, call my method and get an error: Error during proxy processing (PART UNKNOWN (NULL)). This is a very useless error message to me.
So, I activate all manners of tracing, so I can see what's going on calling and retrieving data. I can see that
My proxy is called correctly
The payload sent TO the service looks correct
The payload received FROM the service is correct. I know this because it's identical to the XML I get back calling the service through other means.
The transformation is empty
Here a screen of (the start of) the returned XML. getRecordsResult set is what I need:
This is the second response, after "conversion":
Nothing about this service has been customized: it's generated straight up through the wizard. I have already deleted and recreated it but no results.
Anyone got any advice on what to do next?
I am using wso2esb4.7.0 and ActiveMQ 5.8.0 versions
i followed wso2esb docs they provided store and forward message store policy
But i dont want store i just want to consume those messages which is already has been store
by my client application i wish to pool that messages for every 5 sec
Is it possible in wso2esb jms using ActiveMq
will you write sample code of proxy
<messageProcessor name="Duplicate5" class="org.apache.synapse.message.processors.forward.ScheduledMessageForwardingProcessor" messageStore="Duplicate" xmlns="http://ws.apache.org/ns/synapse">
<parameter name="interval">1000</parameter>
<parameter name="message.processor.reply.sequence">fault</parameter>
</messageProcessor>
i tried with this but its not working
To pull messages from the queue, you need to use JMS transport..Check JMS proxy for the samples..
The message store persists the messages in the form of serializable Java objects. This might contain certain underlying information(E.g.: Properties) which is not visible in the message when you view message details in the ActiveMQ console. The message processor uses such information stored by the store when processing the message. Therefore, as far as I understand, the message store and message processor should be used together if you want to make things functional.
If you're straightaway storing the received messages in ActiveMQ queue, you might have to configure the message consumer manually. Check this usecase [1].
And also look in to this blogpost example to get an idea [2].
[1] http://docs.wso2.org/wiki/display/ESB470/ESB+as+a+JMS+Consumer
[2] http://nuwanwimalasekara.blogspot.com/2013/04/jms-proxy-service-using-wso2-esb.html
Hope this helps.
You can not use the Message-processor alone, You must have combination of Message Store and message processor. if you want to understand the behavior of the Message Store and Message processor refer the blog some time back.
If you want to use listen/pull from the JMS using ESB you have to use ESB as a JMS Consumer. Please refer further on document to implementation detail.
I m constructiong a POC. I am trying to access facebook's graph api using wso2 esb. But it seems that i m not getting the complete json data. So i decided to use Message Relays as mentioned here
But while searching for an example of how to use it i came across 2 terms namely : Message Builders & Formatters. Can any one explain me the difference between these two. Also I was unable to find a working example with sufficient explanation to use Message Relays.
Message Builder : A concepts that comes from AXis2. When a message comes through a given transport(HTTP) to a wso2 esb we need to build a SOAP message out of that (eg. convert JSON to SOAP/XML) based on the message's content type.
Message Formatter : When a message goes out from ESB, again based on the output content type, the message should be converted to the required format. (eg: SOAP to JSON)
Binary Relay : Please refer this post.
I currently have a BizTalk 2006 (r1) application which receives XML from a SQL stored proc using the SQL adapter. It maps this to another schema before sending out to a 3rd party. The send port uses a custom pipeline component which converts the XML to a flat file - in the format required by the customer. I don't use any orchestration, this is a pure message based solution.
This all works great when sending via FTP. However, the 3rd party have now requested that I push the message to a web service they hosy. I haven't received the WSDL yet but can assume that the method I'll be calling simply receives a string as a single parameter.
Could anyone advise on the best way to approach this please? I have created a simple web service stub. I then followed Recipe 6-11 from the excellent BizTalk 2006 Recipes book, generating a proxy class using wsdl.exe which I then reference from the "web service" tab of the SOAP send port. However, when processing an order I get the following message in the event log:
Could not load type 'WSProxy' from assembly 'Direct.IS.Payment.Components, Version=3.1.145.0, Culture=neutral, PublicKeyToken=dc03da781bea1472'.".
The type must derive from System.Web.Services.Protocols.SoapHttpClientProtocol.
The type must have the attribute System.Web.Services.WebServiceBindingAttribute. ".
Next step will be for me to play around with the proxy so that it address the derive and attribute issues mentioned in the even log message. However, I can't help but think that there must be an easier way?
Thanks
The custom pipeline component you have created is not producing a message that is suitable for SOAP transmission. Not knowing what the end customer is going to do, I'd hold off on trying ot make SOAP work. In the mean time, just spin up an ASPX page with the following code:
private void Page_Load(object sender, EventArgs e)
{
StreamReader reader = new StreamReader(page.Request.InputStream);
String xmlData = reader.ReadToEnd();
}
Add code to write XMLData to a DB or to a text file or something to see what it is. This is very crude and does not send a response code. It should get you started.