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‎LICENSE

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BSD 3-Clause License
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Copyright (c) 2022, Automatic Controls Equipment Systems, Inc.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

‎README.md

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# GarbageCollector
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WebCTRL is a trademark of Automated Logic Corporation. Any other trademarks mentioned herein are the property of their respective owners.
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## About
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This WebCTRL add-on invokes `System.gc()` every 5 minutes. Essentially, this hints that the JVM should run its garbage collector, freeing any excess memory. In some cases, this should improve performance of a WebCTRL server.

‎config/BUILD_DETAILS

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JDK Version:
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openjdk 18.0.2.1 2022-08-18
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OpenJDK Runtime Environment (build 18.0.2.1+1-1)
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OpenJDK 64-Bit Server VM (build 18.0.2.1+1-1, mixed mode, sharing)
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Compilation Flags:
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--release 8
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Runtime Dependencies:
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addonsupport-api-addon-1.7.0
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alarmmanager-api-addon-1.7.0
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bacnet-api-addon-1.8.007-20220318.0837r
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directaccess-api-addon-1.7.0
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tomcat-embed-core-9.0.37
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webaccess-api-addon-1.7.0
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xdatabase-api-addon-1.7.0
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Packaged Dependencies:

‎config/COMPILE_FLAGS

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--release 8

‎ext/deploy.bat

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@echo off
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if "%WebCTRL%" EQU "" goto :bad
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if "%addonFile%" EQU "" goto :bad
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if "%certFile%" EQU "" goto :bad
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if /i "%*" EQU "--help" (
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echo DEPLOY Copies the .addon archive and certificate file to the bound WebCTRL installation.
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exit /b 0
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)
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if "%*" NEQ "" (
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echo Unexpected parameter.
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exit /b 1
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)
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if not exist "%addonFile%" (
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echo Cannot deploy because !name!.addon does not exist.
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exit /b 1
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)
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echo Deploying...
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if "!name!" EQU "AddonDevRefresher" (
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echo Cannot be used to self-deploy.
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echo Deployment unsuccessful.
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exit /b 1
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)
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if not exist "%WebCTRL%\addons" mkdir "%WebCTRL%\addons" >nul 2>nul
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copy /y "%certFile%" "%WebCTRL%\addons\%certFileName%" >nul
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copy /y "%addonFile%" "%WebCTRL%\addons\!name!.update" >nul
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if %ErrorLevel% NEQ 0 (
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echo Deployment unsuccessful.
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exit /b 1
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)
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set /a count=0
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:waitUpdate
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timeout 1 /nobreak >nul
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set /a count+=1
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if exist "%WebCTRL%\addons\!name!.update" (
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if "%count%" EQU "60" (
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echo Timeout occurred.
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echo Deployment unsuccessful.
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exit /b 1
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) else (
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goto :waitUpdate
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)
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)
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if exist "%WebCTRL%\addons\!name!.addon" (
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echo Deployment successful.
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exit /b 0
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) else (
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echo Deployment unsuccessful.
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exit /b 1
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)
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:bad
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echo This script should not be invoked as a stand-alone application.
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echo You must use this file as an extension to addon-dev-script.
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echo https://github.com/automatic-controls/addon-dev-script
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echo Press any key to exit.
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pause >nul
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exit /b 1

‎root/info.xml

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<extension version="1">
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<name>GarbageCollector</name>
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<description>A simple WebCTRL add-on which invoked System.gc() every 5 minutes.</description>
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<version>1.0.0</version>
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<vendor>Automatic Controls Equipment Systems, Inc.</vendor>
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</extension>

‎root/webapp/WEB-INF/web.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<web-app>
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<listener>
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<listener-class>aces.webctrl.garbage.Initializer</listener-class>
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</listener>
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<security-constraint>
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<web-resource-collection>
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<web-resource-name>WEB</web-resource-name>
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<url-pattern>/*</url-pattern>
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</web-resource-collection>
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</security-constraint>
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<filter>
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<filter-name>RoleFilterAJAX</filter-name>
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<filter-class>com.controlj.green.addonsupport.web.RoleFilter</filter-class>
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<init-param>
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<param-name>roles</param-name>
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<param-value>view_administrator_only</param-value>
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</init-param>
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</filter>
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<filter-mapping>
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<filter-name>RoleFilterAJAX</filter-name>
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<url-pattern>/*</url-pattern>
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</filter-mapping>
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</web-app>

‎src/aces/webctrl/garbage/Initializer.java

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package aces.webctrl.garbage;
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import javax.servlet.*;
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public class Initializer implements ServletContextListener {
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private volatile Thread thread;
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private volatile boolean go = true;
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@Override public void contextInitialized(ServletContextEvent sce){
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thread = new Thread(){
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@Override public void run(){
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while (go){
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try{
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System.gc();
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Thread.sleep(300000);
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}catch(InterruptedException e){}
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}
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}
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};
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thread.start();
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}
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@Override public void contextDestroyed(ServletContextEvent sce){
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try{
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go = false;
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thread.interrupt();
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thread.join();
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}catch(InterruptedException e){}
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}
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}

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