org.pepstock.jem.node.executors.configuration.CheckHazelcastConfiguration.java Source code

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Here is the source code for org.pepstock.jem.node.executors.configuration.CheckHazelcastConfiguration.java

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/**
JEM, the BEE - Job Entry Manager, the Batch Execution Environment
Copyright (C) 2012-2015   Andrea "Stock" Stocchero
This program 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
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.pepstock.jem.node.executors.configuration;

import java.io.IOException;
import java.io.StringReader;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.apache.commons.io.input.ReaderInputStream;
import org.pepstock.jem.node.NodeMessage;
import org.pepstock.jem.node.executors.DefaultExecutor;
import org.pepstock.jem.node.executors.ExecutorException;
import org.xml.sax.SAXException;

/**
 * Tests if Hazelcast configuration file, updated by user interface, is consistent and valid (from XML point view).
 * 
 * @author Andrea "Stock" Stocchero
 * @version 1.4
 * 
 */
public class CheckHazelcastConfiguration extends DefaultExecutor<Boolean> {

    private static final long serialVersionUID = 1L;

    private String content = null;

    /**
     * Constructs the object with Hazelcast configuration file content to test
     * @param content configuration file content to check
     */
    public CheckHazelcastConfiguration(String content) {
        this.content = content;
    }

    /**
     * Checks if content could be a Hazelcast configuration file
     * @return always TRUE
     * @throws ParserConfigurationException 
     * @throws IOException 
     * @throws SAXException 
     * @throws Exception occurs if errors
     */
    @Override
    public Boolean execute() throws ExecutorException {
        try {
            // XML syntax check
            // because Hazelcast continues if XMl error occurs
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            builder.parse(new ReaderInputStream(new StringReader(content)));
            return Boolean.TRUE;
        } catch (ParserConfigurationException e) {
            throw new ExecutorException(NodeMessage.JEMC241E, e, e.getMessage());
        } catch (SAXException e) {
            throw new ExecutorException(NodeMessage.JEMC241E, e, e.getMessage());
        } catch (IOException e) {
            throw new ExecutorException(NodeMessage.JEMC241E, e, e.getMessage());
        }
    }
}