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Free Java Reporting Library
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2022 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 .
*/
package net.sf.jasperreports.chrome;
import java.util.concurrent.atomic.AtomicLong;
import java.util.function.Function;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.github.kklisura.cdt.launch.ChromeArguments;
import com.github.kklisura.cdt.launch.ChromeLauncher;
import com.github.kklisura.cdt.services.ChromeService;
/**
* @author Lucian Chirita ([email protected])
*/
public class ChromeInstance implements ChromeInstanceHandle
{
private static final Log log = LogFactory.getLog(ChromeInstance.class);
private static final AtomicLong ID_SEQ = new AtomicLong();
private final long id;
private LaunchConfiguration configuration;
private ChromeLauncher launcher;
private ChromeService chromeService;
private volatile ChromeInstanceState state;
public ChromeInstance(LaunchConfiguration configuration)
{
this.id = ID_SEQ.incrementAndGet();
this.configuration = configuration;
this.state = ChromeInstanceState.create();
}
public long getId()
{
return id;
}
public void start()
{
launcher = new ChromeLauncher();
ChromeArguments args = ChromeArgumentsBuilder.instance().toArguments(configuration);
log.info("Launching Chrome instance " + id + " with configuration " + configuration);
chromeService = launcher.launch(configuration.getExecutablePath(), args);
}
public boolean isAlive()
{
return launcher != null && launcher.isAlive();
}
@Override
public T runWithChromeInstance(Function execution)
{
if (log.isDebugEnabled())
{
log.debug("using chrome instance " + id);
}
startUse();
try
{
return execution.apply(chromeService);
}
finally
{
if (log.isDebugEnabled())
{
log.debug("ending use of chrome instance " + id);
}
endUse();
}
}
protected synchronized void startUse()
{
state = state.incrementUse();
}
protected synchronized void endUse()
{
state = state.decrementUse();
if (state.shouldClose())
{
doClose();
}
}
public synchronized ChromeInstanceState getState()
{
return state;
}
public synchronized void close()
{
if (!state.isClosed())
{
if (log.isDebugEnabled())
{
log.debug("closing " + id);
}
state = state.close();
if (state.shouldClose())
{
doClose();
}
//else will be closed by endUse
}
}
protected void doClose()
{
log.info("Shutting down Chrome instance " + id);
launcher.close();
}
}