net.sf.jasperreports.phantomjs.ProcessFactory.java Source code

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Here is the source code for net.sf.jasperreports.phantomjs.ProcessFactory.java

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/*
 * JasperReports - Free Java Reporting Library.
 * Copyright (C) 2001 - 2019 TIBCO Software Inc. All rights reserved.
 * http://www.jaspersoft.com
 *
 * Unless you have purchased a commercial license agreement from Jaspersoft,
 * the following license terms apply:
 *
 * This program is part of JasperReports.
 *
 * JasperReports is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * JasperReports is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with JasperReports. If not, see <http://www.gnu.org/licenses/>.
 */
package net.sf.jasperreports.phantomjs;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.pool2.BasePooledObjectFactory;
import org.apache.commons.pool2.PooledObject;
import org.apache.commons.pool2.impl.DefaultPooledObject;

import net.sf.jasperreports.engine.JRPropertiesUtil;
import net.sf.jasperreports.engine.JRRuntimeException;

/**
 * @author Lucian Chirita (lucianc@users.sourceforge.net)
 */
public class ProcessFactory extends BasePooledObjectFactory<PhantomJSProcess> {
    private static final Log log = LogFactory.getLog(ProcessFactory.class);

    private ProcessDirector director;
    private int expirationCount;
    private int expirationTime;

    public ProcessFactory(ProcessDirector director, JRPropertiesUtil properties) {
        this.director = director;

        this.expirationCount = properties.getIntegerProperty(PhantomJS.PROPERTY_PHANTOMJS_EXPIRATION_COUNT,
                PhantomJS.DEFAULT_PHANTOMJS_EXPIRATION_COUNT);
        this.expirationTime = properties.getIntegerProperty(PhantomJS.PROPERTY_PHANTOMJS_EXPIRATION_TIME,
                PhantomJS.DEFAULT_PHANTOMJS_EXPIRATION_TIME);
    }

    @Override
    public PhantomJSProcess create() throws Exception {
        int port = InetUtil.getAvailablePort();
        PhantomJSProcess process = new PhantomJSProcess(director, port);
        process.startPhantomJS();
        return process;
    }

    @Override
    public PooledObject<PhantomJSProcess> wrap(PhantomJSProcess process) {
        return new DefaultPooledObject<PhantomJSProcess>(process);
    }

    @Override
    public void activateObject(PooledObject<PhantomJSProcess> pooledObject) throws Exception {
        super.activateObject(pooledObject);

        PhantomJSProcess process = pooledObject.getObject();
        if (process.hasEnded()) {
            if (log.isDebugEnabled()) {
                log.debug(process.getId() + " has ended");
            }

            throw new JRRuntimeException("Process " + process.getId() + " has ended");
        }

        long borrowedCount = ((DefaultPooledObject<PhantomJSProcess>) pooledObject).getBorrowedCount();
        if (borrowedCount >= expirationCount) {
            if (log.isDebugEnabled()) {
                log.debug(process.getId() + " borrow count " + borrowedCount + " exceeded expiration count "
                        + expirationCount);
            }

            throw new JRRuntimeException("Process " + process.getId() + " borrow count exceeded");
        }

        long now = System.currentTimeMillis();
        if (now >= pooledObject.getCreateTime() + expirationTime) {
            if (log.isDebugEnabled()) {
                log.debug(process.getId() + " expiration time " + expirationTime + " from "
                        + pooledObject.getCreateTime() + " exceeded");
            }

            throw new JRRuntimeException("Process " + process.getId() + " expiration time exceeded");
        }
    }

    @Override
    public boolean validateObject(PooledObject<PhantomJSProcess> pooledObject) {
        PhantomJSProcess process = pooledObject.getObject();

        String message = "validate" + System.currentTimeMillis();
        String data = "{\"echo\": \"" + message + "\"}";
        if (log.isDebugEnabled()) {
            log.debug(process.getId() + " pinging with " + data);
        }

        try {
            String answer = process.getProcessConnection().runRequest(data);
            if (log.isDebugEnabled()) {
                log.debug(process.getId() + " got answer " + answer);
            }
            return answer.equals(message);
        } catch (Exception e) {
            if (log.isDebugEnabled()) {
                log.debug(process.getId() + " ping failed", e);
            }
            return false;
        }
    }

    @Override
    public void destroyObject(PooledObject<PhantomJSProcess> pooledObject) throws Exception {
        pooledObject.getObject().dispose();
    }

}