Open Source Application Example

Drools Drools is a powerful rule engine. You define rules using .drl file or .xls as an decision table In this post we will see how Drool is embedded in Karaf as OSGI. Pom.xml <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>com.frontend</groupId> <artifactId>frontend-parent</artifactId> <version>1.0</version> </parent> <artifactId>frontend-cmd2</artifactId> <packaging>bundle</packaging> <properties> <runtime.version>6.5.0.Final</runtime.version> <cdi.version>1.1</cdi.version> <weld.version>2.3....

CDI Provides many features like Beans Interceptor Decorator Portable Exception Bean Proxy Interceptor     Interceptors allow you to add functionality to the business methods of a bean without modifying the bean’s method directly. The interceptor is executed before any of the business methods of the bean. Interceptors are defined as part of the Enterprise JavaBeans specification, which can be found at  JSR 318 Define the Binding package com.rest.interceptor; import static java.lang.annotation.ElementType.METHOD; import static java.lang.annotation.ElementType.TYPE; import static java.lang.annotation.RetentionPolicy.RUNTIME; import java.lang.annotation.Retention; import java.lang.annotation.Target; import javax.interceptor.InterceptorBinding; @InterceptorBinding @Target({ TYPE, METHOD }) @Retention(RUNTIME) public @interface Log { } Mark the interceptor implementation package com.rest.interceptor; impor...

Apache KARAF + PAX CDI TOC Links to All the Apache Karaf  POST   OSGI Service   OSGI Command to Consume the OSGI Service   CXF + JaxRS + CDI to Consume the OSGI Service using  cxf-jaxrs-integration   PAX-CDI + Interceptor OSGI + PAX-CDI + Drool + Karaf OSGI  + PAX-CDI + Drool + Karaf + Decision Table

Apache CXF CDI + Apache Karaf We are going to follow the following specs to create CXF application in Karaf Jaxrs Spec -  JSR-339 CDI 1.1 (JSR-346) Create an Rest API and Implement the Rest Service Provider for the Same.  Expose the feature with feature:install cxf-jaxrs-cdi supported in Apache Karaf. osgi-example-rest.api  Rest Api will  Pom.xml <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>osgi.example</groupId> <artifactId>osgi-example-rest</artifactId> <version>1.0</version> </parent> <artifactId>osgi-example-rest.api</artifactId> <packaging>bundl...