package flex.messaging;


import javax.servlet.ServletConfig;
import java.io.File;
import java.io.IOException;

/**
 * @author Ivan Latysh
 *
 * @since 9-May-2008 1:59:23 PM
 */
public class MyMessageBrokerServlet extends MessageBrokerServlet{

  protected String getFlexWritePath(ServletConfig servletConfig) throws IllegalArgumentException, IOException{
    String DEFAULT_WRITE_PATH = "WEB-INF/flex";
    File writePath = null;
    // sanity check
    if (servletConfig == null) throw new IllegalArgumentException("Given servlet config is null");
    // get write path
    String flexWritePathString = servletConfig.getInitParameter("flex.write.path");
    // use default value
    if (null==flexWritePathString) {
      // report
      servletConfig.getServletContext().log("`flex.write.path` has not been specified, will use {"+DEFAULT_WRITE_PATH+"}");
      flexWritePathString = DEFAULT_WRITE_PATH;
    }

    // get application home
    File applicationHome = new File(servletConfig.getServletContext().getRealPath("/"));
    // consult with security manager
    if (null!=System.getSecurityManager()) {
      try {
        System.getSecurityManager().checkRead(applicationHome.getAbsolutePath());
      } catch (Exception e) {
        // report
        servletConfig.getServletContext().log("Current security configuration deny READ access to {"+applicationHome.getAbsolutePath()+"}", e);
        // break here
        throw new IOException("READ access has been denied to application home directory {"+applicationHome.getAbsolutePath()+"}", e);
      }
    }

    // construct write path
    writePath = new File(applicationHome, flexWritePathString);
    // consult with security manager
    if (null!=System.getSecurityManager()) {
      try {
        System.getSecurityManager().checkWrite(writePath.getAbsolutePath());
      } catch (Exception e) {
        // report
        servletConfig.getServletContext().log("Current security configuration deny WRITE access to {"+writePath.getAbsolutePath()+"}", e);
        // add stack trace
        e.printStackTrace();
        // break here
        throw new IOException("WRITE access has been denied to {"+writePath.getAbsolutePath()+"}", e);
      }
    }

    // return write path
    return writePath.getAbsolutePath();
  }
}