public void start()

in src/main/java/org/apache/log4j/varia/LogFilePatternReceiver.java [1047:1099]
51 lines of code
10 McCabe index (conditional complexity)

    public void start() {
        logger.info("activateOptions");
        active = true;
        Runnable runnable = new Runnable() {
            public void run() {
                initialize();
                while (reader == null) {
                    logger.info("attempting to load file: " + getFileURL());
                    try {
                        reader = new InputStreamReader(new URL(getFileURL()).openStream(), "UTF-8");
                    } catch (FileNotFoundException fnfe) {
                        logger.info("file not available - will try again");
                        synchronized (this) {
                            try {
                                wait(MISSING_FILE_RETRY_MILLIS);
                            } catch (InterruptedException ie) {
                            }
                        }
                    } catch (IOException ioe) {
                        logger.warn("unable to load file", ioe);
                        return;
                    }
                }
                try {
                    BufferedReader bufferedReader = new BufferedReader(reader);
                    createPattern();
                    do {
                        process(bufferedReader);
                        try {
                            synchronized (this) {
                                wait(waitMillis);
                            }
                        } catch (InterruptedException ie) {
                        }
                        if (tailing) {
                            logger.debug("tailing file");
                        }
                    } while (tailing);

                } catch (IOException ioe) {
                    //io exception - probably shut down
                    logger.info("stream closed");
                }
                logger.debug("processing " + path + " complete");
                shutdown();
            }
        };
        if (useCurrentThread) {
            runnable.run();
        } else {
            new Thread(runnable, "LogFilePatternReceiver-" + getName()).start();
        }
    }