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EnsurePreparedForHttpLogging.java
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EnsurePreparedForHttpLogging.java
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/*
* Copyright (c) 2002-2016 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.server.preflight;
import org.apache.commons.io.FileUtils;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import java.io.File;
import java.io.IOException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.neo4j.kernel.configuration.Config;
import org.neo4j.server.configuration.ServerSettings;
public class EnsurePreparedForHttpLogging implements PreflightTask
{
private String failureMessage = "";
private Config config;
public EnsurePreparedForHttpLogging( Config config )
{
this.config = config;
}
@Override
public boolean run()
{
boolean enabled = config.get( ServerSettings.http_logging_enabled );
if ( !enabled )
{
return true;
}
File configFile = config.get( ServerSettings.http_log_config_file );
if ( configFile == null )
{
failureMessage = "HTTP logging configuration file is not specified";
return false;
}
File logLocation = extractLogLocationFromConfig( configFile.getAbsolutePath() );
if ( logLocation != null )
{
return validateFileBasedLoggingConfig( logLocation );
}
// File logging is not configured, no other logging can be easily checked here
return true;
}
private boolean validateFileBasedLoggingConfig( File logLocation )
{
try
{
FileUtils.forceMkdir( logLocation );
}
catch ( IOException e )
{
failureMessage = String.format( "HTTP log directory [%s] does not exist",
logLocation.getAbsolutePath() );
return false;
}
if ( !logLocation.exists() )
{
failureMessage = String.format( "HTTP log directory [%s] cannot be created",
logLocation.getAbsolutePath() );
return false;
}
if ( !logLocation.canWrite() )
{
failureMessage = String.format( "HTTP log directory [%s] is not writable",
logLocation.getAbsolutePath() );
return false;
}
return true;
}
private File extractLogLocationFromConfig( String configLocation )
{
DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
try
{
final File file = new File( configLocation );
DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
Document doc = docBuilder.parse( file );
final Node node = doc.getElementsByTagName( "file" ).item( 0 );
return new File( node.getTextContent() ).getParentFile();
}
catch ( Exception e )
{
return null;
}
}
@Override
public String getFailureMessage()
{
return failureMessage;
}
}