Caching invalidating with managed store
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This document discusses how to use caching with the NonPersistentManagedObjectStore in Mule and invalidate the cache. It shows how to configure caching in a flow using the cache scope, retrieve data from the cache even after deleting it from the database, and invalidate the entire cache using another flow that calls invalidate-cache. Testing is done using SoapUI to call the web service and observe the cached response and fresh response after cache invalidation.
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Mule Esb Data Weave
This document provides an example of using DataWeave to transform XML input into a Java Object. The XML input contains user data that is mapped to a User class using DataWeave transformations. The User class is defined with firstName and lastName properties that correspond to the name and lastName elements in the XML. DataWeave code is used to parse the XML payload and set the properties of a User object that is returned.
Active mq Installation and Master Slave setup
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Mulesoft xml to Java Conversion
This document discusses transforming XML data to a Java object using MuleSoft's DataWeave transformation language. The transformation flow reads an XML file containing user data, uses DataWeave to map the name and lastName fields to a User object's firstName and lastName properties, and outputs the result as a Java object. The User class is defined with getters and setters for firstName and lastName. DataWeave allows defining the target type as a User object which the transformed payload is cast to.
Using jersey exception mapper
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Playing with cxf interceptor in mule
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1. Configure a CXF outbound fault interceptor in the Mule flow to intercept faults.
2. Implement a custom interceptor class to handle faults by modifying fault messages.
3. Test the custom fault handling by invoking the service with a valid request and invalid request in SOAPUI.
Servlets
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A Java servlet is a Java program that extends the capabilities of a server. Although servlets can respond to any types of requests, they most commonly implement applications hosted on Web servers. Such Web servlets are the Java counterpart to other dynamic Web content technologies such as PHP and ASP.NET.
19servlets
This document provides an overview and introduction to servlet technology. It discusses what servlets are, their advantages over traditional CGI, how they handle client requests including form data and HTTP request headers, how to generate server responses, and how to debug servlets. It also provides code examples for simple servlets that generate HTML and handle request parameters.
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Web services Overview in depth
This document provides an overview of the history and evolution of XML technologies. It discusses how XML was developed based on SGML and aimed to describe data in a structured format. Key technologies enabled by XML include XML schemas, which define document structure and data types, and transformations languages like XSLT, which allow XML documents to be manipulated. The document also outlines Java APIs that can be used to programmatically work with XML documents and parse XML content.
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Mule Overview
The document discusses the open-source enterprise service bus Mule, including what Mule is, its core concepts like the universal message object and endpoints, and how Mule uses technologies like staged event-driven architecture and non-blocking I/O to move data between different systems and formats in a flexible way. It also provides examples of using Mule to move XML files between directories and handling exceptions.
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The document discusses decomposing a complex Mule flow into smaller parts using VM components.
The VM transport allows breaking a large, complex flow into smaller pieces connected by queues for better control and performance. This helps control each event queue, reduces flow complexity, and prevents resources from being overcommitted.
The example shows exposing a CXF web service by breaking the flow into two parts connected by a VM queue. It stores the SOAP action in a property before sending to the VM queue to preserve it for the second flow.
Validating a soap request in mule
The document discusses validating SOAP requests in Mule by using a schema validation filter. The filter allows validating a SOAP request against an XSD schema file. If invalid, a custom error message can be returned. The code example shows adding the filter to the flow before the SOAP service. This validates requests and routes invalid ones to a subflow to return the error.
Using xslt in mule
XSLT is used to transform XML payloads between different forms. In Mule, the XSLT transformer component allows transforming XML payloads using XSLT stylesheets. For example, a flow uses an HTTP inbound endpoint, sets an XML payload, and applies an XSLT stylesheet using the XSLT transformer to output a new transformed XML payload. The XSLT stylesheet matches elements in the input XML and outputs a new structure defined in the stylesheet.
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Scatter gather flow control
The document discusses scatter-gather flow control in Mulesoft. Scatter-gather sends a request message concurrently to multiple targets and aggregates the responses. It replaces the deprecated all message processor by executing routes in parallel instead of sequentially, improving efficiency. Scatter-gather collects results into a message collection. If a route fails, it sets the exception payload and throws a composite exception mapping failures to routes.
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Caching invalidating with managed store
- 1. Caching and invalidating with managed-store
- 2. Today’s topic we will be discussing the NonPersistentManagedObjectStore and we will not be doing any complex Caching configuration with spring beans in our Mule config. .
- 3. How ??? I will show you how .
- 4. So, let us consider we have configured a web service with the Mule cache scope in following way:-
- 5. <flow name="ServiceFlow" doc:name="ServiceFlow"> <http:inbound-endpoint exchange-pattern="request-response" host="localhost" port="8082" path="mainData" doc:name="HTTP" /> <object-to-string-transformer doc:name="Object to String"/> <ee:cache doc:name="Cache" cachingStrategy-ref="cachingStrategy" > <vm:outbound-endpoint exchange-pattern="request-response" path="Flow1-WT-Main" doc:name="VM"/> <object-to-string-transformer doc:name="Object to String"/> </ee:cache> </flow> <flow name="ServiceFlow2" doc:name="ServiceFlow2"> <vm:inbound-endpoint exchange-pattern="request-response" path="Flow1-WT-Main" doc:name="VM"/> <cxf:jaxws-service serviceClass="com.test.services.schema.maindata.v1.MainData" doc:name="SOAP"/> <component class="com.test.services.schema.maindata.v1.Impl.MainDataImpl" doc:name="JavaMain_ServiceImpl"/> </flow> Corresponding Mule flow will be :-
- 6. Now we will configure our cachingStrategy with NonPersistentManagedObjectStore as follows:- <ee:object-store-caching-strategy name="cachingStrategy" doc:name="cachingStrategy"> <managed-store storeName="myNonPersistentManagedObjectStore" maxEntries="-1" entryTTL="20000" expirationInterval="5000"/> </ee:object-store- caching-strategy> So it is very simple right ?
- 7. In next step we will be running and testing the application. This web servicewill intereact with database retrieve a row from the database and show the row value in the SOAP response.
- 8. Here how we will test the web service :- You can see that we have used SoapUI to test the web service. Now when we hit the service, you can see in the SOAP request, it takes id as input and then fetches all the data from the database for that id.
- 9. Now, what we will do is manually deleting the entire row from the database. In my case, I have used sql server and deleted the row from the table using a SQL query:-
- 10. With this in place, if we again hit the service, we will get the same response as we got earlier:-
- 11. You can see that, though the entire row is deleted from the database table, it’s still showing the response, which means it is fetching the response from cache and not hitting the actual database
- 12. Now, let’s create a Mule flow that will invalidate and clear all the Cache So, with following flow we can clear all the Cache that has been used:-
- 13. Corresponding Mule config will be :- <flow name="cacheinvalidate" doc:name="cacheinvalidate"> <http:inbound-endpoint exchange-pattern="request-response" address="http://localhost:8083/invalidate" doc:name="HTTP"/> <object-to-string-transformer doc:name="Object to String"/> <ee:invalidate-cache cachingStrategy-ref="cachingStrategy"/> <set- payload value="All cache invalidated" doc:name="Set Payload"/> </flow> As we can see the above flow will use ee:invalidate-cache to clear all the cache.
- 14. Now if we hit the url:- http://localhost:8083/invalidate following way :-
- 15. So, we can hit the web service again to test the output. So, now if we hit service again after the cache has been invalidated, we will find the following result As you can see, it clearly shows no records are there in the database, which means the cache has invalidated successfully and the service is actually hitting the database.
- 16. It’s simple example.. isn’t it … we don’t need to configure any complex configuration for the cache as compared to the configuration we need to do in case of using cache with EHCache.
- 17. Hope you enjoyed the simple usage of Cache with NonPersistentManagedObjectStore and the way of invalidating it.