whats new in Camel 4.6 (#1182)

* Whats new 4.6 blog WIP

* Whats new 4.6 blog WIP

* Whats new 4.6 blog WIP

content/blog/2024/05/camel46-whatsnew/index.md

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+---
+title: "Apache Camel 4.6 What's New"
+date: 2024-05-10
+authors: [davsclaus]
+categories: ["Releases"]
+preview: Summary of what's new and improved in the Camel 4.6 release.
+---
+
+Apache Camel 4.6 has just been [released](/blog/2024/05/RELEASE-4.6.0/).
+
+This release introduces a set of new features and noticeable improvements that we will cover in this blog post.
+
+## Camel JBang
+
+We fixed some issues using Camel JBang with Windows, but we would still like more feedback from Windows users.
+
+Camel JBang is __primary__ intended to be Camel standalone only. However, we added
+support for running with Spring Boot or Quarkus directly.
+
+You use the `--runtime` option to specify which platform to use, as shown below:
+
+    $ camel run foo.camel.yaml --runtime=spring-boot
+
+And for Quarkus:
+
+    $ camel run foo.camel.yaml --runtime=quarkus
+
+There are several limitations, one would be that Spring Boot and Quarkus cannot automatically detect new components and download JARs.
+(you can stop and run again to update dependencies).
+
+You can now also configure logging levels per package name in `application.properties` as shown below:
+
+    logging.level.org.apache.kafka = DEBUG
+    logging.level.com.foo.something = TRACE
+
+You can also do this using Quarkus _style_:
+
+    quarkus.log.category."org.apache.kafka".level = DEBUG
+    quarkus.log.category."com.foo.something".level = TRACE
+
+And we also made it possible to define JDBC `DataSource` using Spring Boot _style_ directly in `application.properties` as follows:
+
+    spring.datasource.url= jdbc:sqlserver://db.example.net:1433;databaseName=test_db
+    spring.datasource.username=user
+    spring.datasource.password=password
+    spring.datasource.driverClassName=com.microsoft.sqlserver.jdbc.SQLServerDriver
+
+## DSL
+
+The XML and YAML DSL now have harmonized defining `beans` in both routes and kamelets to be the _same_ which
+makes it possible to define beans using constructors, properties, builders, factory beans, scripts and much more, all in the same way.
+
+Added `setVariables` EIP to make it possible to set multiple variables from a single EIP.
+
+## Rest DSL with contract first 
+
+The Rest DSL has been improved with a _contract first_ approach using vanilla OpenAPI specification.
+
+The _contract first_ approach requires you to have an existing OpenAPI v3 specification file.
+This contract is a standard OpenAPI contract, and you can use any existing API design tool to build such contracts.
+
+This makes it super easy to define Rest DSL in Camel from an existing OpenAPI specification file, all you do
+is to declare this small piece of Rest DSL code:
+
+For example in Java DSL:
+
+    public void configure() throws Exception {
+        rest().openApi("petstore-v3.json");
+    }
+
+The `petstore-v3.json` is the OpenAPI specification file, and Camel will automatically parse and map each API endpoint
+to a Camel route with the `direct:operationId` convention.
+
+During development of these API endpoints in Camel you can tell Camel to ignore missing routes, so you can build, run, and test
+this one API at a time. 
+
+Here is an example for Camel Spring Boot: https://github.com/apache/camel-spring-boot-examples/tree/main/openapi-contract-first
+And here is an example for YAML DSL with JBang: https://github.com/apache/camel-kamelets-examples/tree/main/jbang/open-api-contract-first
+
+## Miscellaneous
+
+Upgraded many third-party dependencies to the latest releases at the time of release.
+
+The `camel-azure-eventbus` component has been refactored to use high-level client which is more robust and
+have better failover and reconnection support.
+
+The `camel-sql` component can now use variables in the SQL queries.
+
+The `camel-kafka` component is upgraded to Kafka 3.7 client. Added `JMSDeserializer` to `camel-kafka` that users can use to
+let Kafka handle serializing/de-serializing JMS headers correct by their expected types (long, int, string etc.)
+
+The Rest DSL `clientRequestValidation` now supports validating for allowed values as well.
+
+The `@PropertyInject` can inject as an array/list type where the string value is splitted by a separator (such as a comma)
+
+Camel Spring Boot has been upgraded to Spring Boot 3.2.5.
+
+## New Components
+
+This release only brings two new components:  
+
+- `camel-google-pubsub-lite` - Send and receive messages to/from Google Cloud Platform PubSub Lite Service.
+- `camel-pinecone` - Perform operations on the Pinecone Vector Database.
+- `camel-rest-openapi` - Refactored to use another json validator library that is Jakarta EE compatible.
+
+## Upgrading
+
+Make sure to read the [upgrade guide](/manual/camel-4x-upgrade-guide-4_6.html) if you are upgrading from a previous Camel version.
+
+If you are upgrading from, for example, 4.0 to 4.4, then make sure to follow the upgrade guides for each release in-between, i.e.
+4.0 -> 4.1, 4.1 -> 4.2, and so forth.
+
+## Release Notes
+
+You can find more information about this release in the list of JIRA tickets resolved in the release:
+
+- [Release notes 4.6](/releases/release-4.6.0/)
+
+## Roadmap
+
+The following 4.7 release (non LTS) is planned to upgrade to Spring Boot 3.3, and to be released in July.
+