Spring Boot Application Live Reload (Hot Swap) with Intellij IDEA

While developing Spring Boot Applications using Intellij IDEA, it was so annoying to restart the spring boot app after each and every change. Spring boot provides live reload (how swap) of application out of the box using the following dependency.
 

<dependency>
    <groupid>org.springframework.boot</groupid>
    <artifactid>spring-boot-devtools</artifactid> 

</dependency>

But it didn't live reload the application/container and the hot deployment, didn't work for changes. Further researching found that following changes needed to be done, in order the hot deployment to be worked correctly.

1. Open the Settings --> Build-Execution-Deployment --> Compiler
    and enable the Make Project Automatically.

2. Then press ctrl+shift+A and search for registry. In the registry make the following configuration enabled.

compiler.automake.allow.when.app.running

3. Restart the IDE.

That's it now the hot deployment works and you don't have to restart manually after each and every change. :)

How to Enable Asynchronous Logging with C5

In this post we are going to explore on how to enable asynchronous logging on C5 based servers. More on asynchronous logging can be found here.

1. Copy the disrupter dependency to the /osgi/plugins folder. You can get the disrupter OSGi bundle from here.
2. Edit launch.properties the /bin/bootstrap/org.wso2.carbon.launcher-5.1.0.jar and add the disrupter jar to the initial bundles list.

carbon.initial.osgi.bundles=\
  file\:plugins/org.eclipse.osgi.services_3.4.0.v20140312-2051.jar@1\:true,\
  file\:plugins/disruptor-3.2.0.jar@2\:true,\
  file\:plugins/org.ops4j.pax.logging.pax-logging-api_1.8.4.jar@2\:true,\
  file\:plugins/org.ops4j.pax.logging.pax-logging-log4j2_1.8.4.jar@2\:true,\
  file\:plugins/org.eclipse.equinox.simpleconfigurator_1.1.0.v20131217-1203.jar@3\:true

3. Set the org.ops4j.pax.logging.log4j2.async to true in the pax logging parameters.

4. Add the async loggers to the log4j2.xml file

<?xml version="1.0" encoding="UTF-8"?>
<!--
 Copyright (c) 2015, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
-->

<Configuration>
    <Appenders>
 <RandomAccessFile name="RandomAccessFile" fileName="${sys:carbon.home}/logs/carbon.log" immediateFlush="false" append="false">
        <PatternLayout>
          <Pattern>[%d] %5p {%c} - %m%ex%n</Pattern>
        </PatternLayout>
     </RandomAccessFile>
        <Console name="CARBON_CONSOLE" target="SYSTEM_OUT">
            <PatternLayout pattern="[%d] %5p {%c} - %m%ex%n"/>
        </Console>
        
    </Appenders>
    <Loggers>

 <AsyncLogger name="com.foo.Bar" level="trace" includeLocation="true">
      <AppenderRef ref="RandomAccessFile"/>
    </AsyncLogger>

        <Root level="debug">
     <AppenderRef ref="RandomAccessFile"/>
            <AppenderRef ref="CARBON_CONSOLE"/>
        </Root>
    </Loggers>
</Configuration>

That's it now you have enabled the asynchronous logging with C5.