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POderby.log (etc) control in a webapp
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copied!<p>Derby has a series of configuration options that are controlled by system properties. It's quite painful to arrange system property settings in a webapp. Has anyone come up with a solution?</p> <p>In addition, I have been unable to make them work in a webapp.</p> <p>Here is the code of a servlet context listener. derby.log is still created in the cwd of the container, rather than calls being made to my logging procedure.</p> <pre><code>/** * Listener to try to get Derby to behave better. */ public class ContextListener implements ServletContextListener { private static final String TEMP_DIR_ATTRIBUTE = "javax.servlet.context.tempdir"; private static ServletContext context; private static Writer logWriter; private class LogWriter extends Writer { @Override public void close() throws IOException { } @Override public void flush() throws IOException { } @Override public void write(char[] cbuf, int off, int len) throws IOException { context.log(new String(cbuf, off, len)); } } /** {@inheritDoc}*/ public void contextDestroyed(ServletContextEvent sce) { } public static Writer getLogSteam() { return logWriter; } /** {@inheritDoc}*/ public void contextInitialized(ServletContextEvent sce) { logWriter = new LogWriter(); File tempDirFile = (File)sce.getServletContext().getAttribute(TEMP_DIR_ATTRIBUTE); context = sce.getServletContext(); System.setProperty("derby.system.home", tempDirFile.getAbsolutePath()); System.setProperty("derby.stream.error.method", "com.basistech.vws.ContextListener.getLogStream"); } } </code></pre>

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