private void ensureDownloaded(File file, String downloadLink) throws IOException {
if (file.exists()) {
file.delete();
}
file.getParentFile().mkdirs();
System.out.println("Copying: " + downloadLink + " -> " + file);
FileTools.streamFileTo(downloadLink, file);
}
public Neo4jRunner() throws IOException {
if (canControlServer() && !neo4jHome.exists()) {
// download neo4j server from a URL
File neo4jTarball = new File("./target/" + neo4jVersion + ".tar.gz");
ensureDownloaded(neo4jTarball, neo4jLink);
// Untar the neo4j server
System.out.println("Extracting: " + neo4jTarball + " -> " + neo4jDir);
FileTools.extractTarball(neo4jTarball, neo4jDir, neo4jHome);
}
}