psiprobe.controllers.system.AdviseGarbageCollectionController.java Source code

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Here is the source code for psiprobe.controllers.system.AdviseGarbageCollectionController.java

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/**
 * Licensed under the GPL License. You may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 *
 * THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 * WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE.
 */
package psiprobe.controllers.system;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.ServletRequestUtils;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.ParameterizableViewController;
import org.springframework.web.servlet.view.RedirectView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Advises Java to run GC asap.
 * 
 * @author Vlad Ilyushchenko
 */
public class AdviseGarbageCollectionController extends ParameterizableViewController {

    /** The Constant logger. */
    private static final Logger logger = LoggerFactory.getLogger(AdviseGarbageCollectionController.class);

    /** The replace pattern. */
    private String replacePattern;

    /**
     * Gets the replace pattern.
     *
     * @return the replace pattern
     */
    public String getReplacePattern() {
        return replacePattern;
    }

    /**
     * Sets the replace pattern.
     *
     * @param replacePattern the new replace pattern
     */
    public void setReplacePattern(String replacePattern) {
        this.replacePattern = replacePattern;
    }

    @Override
    protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response)
            throws Exception {

        boolean finalization = ServletRequestUtils.getBooleanParameter(request, "fin", false);

        String referer = request.getHeader("Referer");
        String redirectUrl;
        if (referer != null) {
            redirectUrl = referer.replaceAll(replacePattern, "");
        } else {
            redirectUrl = request.getContextPath() + getViewName();
        }
        if (finalization) {
            Runtime.getRuntime().runFinalization();
            logger.debug("Advised finalization");
        } else {
            Runtime.getRuntime().gc();
            logger.debug("Advised Garbage Collection");
        }
        logger.debug("Redirected to {}", redirectUrl);
        return new ModelAndView(new RedirectView(redirectUrl));
    }

}