StringWriterAppender.java 文件源码

@Override
protected void append(LoggingEvent event) {
    if (this.layout == null) {
        errorHandler.error("No layout for appender " + name,
                null, ErrorCode.MISSING_LAYOUT);
        return;
    }
    String message = this.layout.format(event);
    Session session = sessions.get(event.getThreadName());
    if (session != null) {
        try {
            session.getBasicRemote().sendText(gson.toJson(new Response(message, "", false)));
        } catch (IOException ex) {
            System.err.println("IOException " + ex.getMessage());
        }
    } else {
        System.err.println("No session found for thread " + event.getThreadName());
    }
}