Agfdhyk

my company is shifting from tomcat to WebLogic 12.1.3, So I am trying to create a sample Spring MVC rest application on WebLogic.
I clone a sample project from here https://github.com/hasanozgan/spring-mvc-akka-maven-weblogic-demo which is working fine, then modified few files accordingly.

POM
changed spring version to 4.2.1.RELEASE
add Jackson dependency

<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/maven-v4_0_0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <groupId>com.hasanozgan.common</groupId>

    <artifactId>akka-demo</artifactId>

    <packaging>war</packaging>

    <version>1.0-SNAPSHOT</version>

    <name>Spring Akka Maven Webapp</name>

    <url>http://maven.apache.org</url>

    <properties>

        <spring.version>4.2.1.RELEASE</spring.version>

        <akka.version>2.3.0</akka.version>

        <scala.version>2.10</scala.version>

    </properties>

    <dependencies>

        <!-- Spring 3 dependencies -->

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-core</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>com.fasterxml.jackson.core</groupId>

            <artifactId>jackson-databind</artifactId>

            <version>2.9.7</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-web</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-webmvc</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <!-- AKKA Version -->

        <dependency>

            <groupId>com.typesafe.akka</groupId>

            <artifactId>akka-actor_${scala.version}</artifactId>

            <version>${akka.version}</version>

        </dependency>

        <dependency>

            <groupId>cglib</groupId>

            <artifactId>cglib</artifactId>

            <version>2.2.2</version>

        </dependency>

        <dependency>

            <groupId>javax.inject</groupId>

            <artifactId>javax.inject</artifactId>

            <version>1</version>

        </dependency>

        <dependency>

            <groupId>javax.servlet</groupId>

            <artifactId>servlet-api</artifactId>

            <version>2.5</version>

            <scope>provided</scope>

        </dependency>

    </dependencies>

    <repositories>

        <repository>

            <id>com.typesafe.repo-releases</id>

            <name>Typesafe Maven Releases Repository</name>

            <url>http://repo.typesafe.com/typesafe/releases</url>

            <releases>

                <enabled>true</enabled>

            </releases>

            <snapshots>

                <enabled>true</enabled>

            </snapshots>

        </repository>

    </repositories>

    <build>

        <finalName>akka-demo</finalName>

        <plugins>

            <plugin>

                <artifactId>maven-compiler-plugin</artifactId>

                <configuration>

                    <source>1.6</source>

                    <target>1.6</target>

                </configuration>

            </plugin>

        </plugins>

    </build>

</project>

mvc-dispatcher-servlet.xml
commented InternalResourceViewResolver because it’s a rest application.

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:context="http://www.springframework.org/schema/context"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="

        http://www.springframework.org/schema/beans     

        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

        http://www.springframework.org/schema/context 

        http://www.springframework.org/schema/context/spring-context-3.0.xsd">

    <context:component-scan base-package="com.hasanozgan.demo" />

    <!-- <bean  class="org.springframework.web.servlet.view.InternalResourceViewResolver">

        <property name="prefix">

            <value>/WEB-INF/pages/</value>

        </property>

        <property name="suffix">

            <value>.jsp</value>

        </property>

    </bean> -->

</beans>

a sample data pojo class with 3 variables.

    package com.hasanozgan.demo.controllers;

import java.util.Date;

public class Data {

    int rollNo;

    String name;

    Date d;

    public int getRollNo() {

        return rollNo;

    }

    public void setRollNo(int rollNo) {

        this.rollNo = rollNo;

    }

    public Date getD() {

        return d;

    }

    public void setD(Date d) {

        this.d = d;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

}

Controller
replaced @Controller with @RestController and add pojo class as return type

    package com.hasanozgan.demo.controllers;

import java.util.Date;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.RestController;

import com.hasanozgan.demo.controllers.Data;

@RestController

@RequestMapping("/")

public class HelloController {

    @RequestMapping(method = RequestMethod.GET)

    public Data home() {

        Data d = new Data();

        d.setName("hello");

        d.setRollNo(1);

        d.setD(new Date());

        return d;

    }

}

Deployment is successful on weblogic but when I am hitting rest url

http://localhost:7001/akka-demo with postman its saying

Root cause of ServletException.

java.lang.StackOverflowError

    at org.springframework.context.event.AbstractApplicationEventMulticaster$ListenerCacheKey.hashCode(AbstractApplicationEventMulticaster.java:312)

    at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936)

    at org.springframework.context.event.AbstractApplicationEventMulticaster.getApplicationListeners(AbstractApplicationEventMulticaster.java:169)

    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:125)

    at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:380)

    at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:334)

    at org.springframework.web.servlet.FrameworkServlet.publishRequestHandledEvent(FrameworkServlet.java:1073)

    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)

    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:731) 

What am I doing wrong?