edu.stanford.protege.webprotege.init.CheckDataDirectoryIsReadableAndWritable Maven / Gradle / Ivy

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package edu.stanford.protege.webprotege.init;

import edu.stanford.protege.webprotege.inject.DataDirectory;

import javax.inject.Inject;
import java.io.*;
import java.util.UUID;

import static com.google.common.base.Preconditions.checkNotNull;

/**
 * Author: Matthew Horridge

 * Stanford University

 * Bio-Medical Informatics Research Group

 * Date: 10/04/2013
 */
public class CheckDataDirectoryIsReadableAndWritable implements ConfigurationTask {

    private final File dataDirectory;

    @Inject
    public CheckDataDirectoryIsReadableAndWritable(@DataDirectory File dataDirectory) {
        this.dataDirectory = checkNotNull(dataDirectory);
    }

    @Override
    public void run() throws WebProtegeConfigurationException {
        File testFile = new File(dataDirectory, "write.test." + UUID.randomUUID() + ".txt");
        try {
            try {
                OutputStream os = new FileOutputStream(testFile);
                os.write(1);
                os.close();
            }
            catch (FileNotFoundException e) {
                throw new WebProtegeConfigurationException(
                        "WebProtege is not able to write to the WebProtege data directory located at " +
                                dataDirectory +
                                ".  Please check that the specified data directory exists and that " +
                                "the user which the servlet container (tomcat) runs under has both " +
                                "read and write permission for this directory and its contents.");
            }
            catch (IOException e) {
                throw new WebProtegeConfigurationException(e);
            }

            try {
                InputStream is = new FileInputStream(testFile);
                is.read();
                is.close();
            }
            catch (FileNotFoundException e) {
                throw new WebProtegeConfigurationException(
                        "WebProtege is not able to read the WebProtege data directory located at " +
                                dataDirectory +
                                ".  Please check that the specified data directory exists and that the " +
                                "user which the servlet container (tomcat) runs under has both read and " +
                                "write permission for this directory and its contents.");
            }
            catch (IOException e) {
                throw new WebProtegeConfigurationException(e);
            }
        }
        finally {
            testFile.delete();
        }


    }

}