Example usage for org.springframework.web.util WebUtils setWebAppRootSystemProperty

Introduction

In this page you can find the example usage for org.springframework.web.util WebUtils setWebAppRootSystemProperty.

Prototype

public static void setWebAppRootSystemProperty(ServletContext servletContext) throws IllegalStateException 

Source Link

Document

Set a system property to the web application root directory.

Usage

From source file:com.shengpay.commons.bp.logback.LogbackWebConfigurer.java

/**
 * Initialize logback, including setting the web app root system property.
 * /*from w w  w . j a v  a  2s  .  com*/
 * @param servletContext
 *            the current ServletContext
 * @see WebUtils#setWebAppRootSystemProperty
 */
public static void initLogging(ServletContext servletContext) {
    // Expose the web app root system property.
    if (exposeWebAppRoot(servletContext)) {
        WebUtils.setWebAppRootSystemProperty(servletContext);
    }

    // Only perform custom logback initialization in case of a config file.
    String location = servletContext.getInitParameter(CONFIG_LOCATION_PARAM);
    if (location != null) {
        // Perform actual logback initialization; else rely on logback's default initialization.
        try {
            // Return a URL (e.g. "classpath:" or "file:") as-is;
            // consider a plain file path as relative to the web application root directory.
            if (!ResourceUtils.isUrl(location)) {
                // Resolve system property placeholders before resolving real path.
                location = SystemPropertyUtils.resolvePlaceholders(location);
                location = WebUtils.getRealPath(servletContext, location);
            }

            // Write log message to server log.
            servletContext.log("Initializing logback from [" + location + "]");

            // Initialize without refresh check, i.e. without logback's watchdog thread.
            LogbackConfigurer.initLogging(location);

        } catch (FileNotFoundException ex) {
            throw new IllegalArgumentException("Invalid 'logbackConfigLocation' parameter: " + ex.getMessage());
        }
    }
}

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From source file:ch.qos.logback.ext.spring.web.WebLogbackConfigurer.java

/**
 * Initialize Logback, including setting the web app root system property.
 *
 * @param servletContext the current ServletContext
 * @see org.springframework.web.util.WebUtils#setWebAppRootSystemProperty
 *///from  ww  w.  j  a v a 2 s. c  o  m
public static void initLogging(ServletContext servletContext) {
    // Expose the web app root system property.
    if (exposeWebAppRoot(servletContext)) {
        WebUtils.setWebAppRootSystemProperty(servletContext);
    }

    // Only perform custom Logback initialization in case of a config file.
    String location = servletContext.getInitParameter(CONFIG_LOCATION_PARAM);
    if (location != null) {
        // Perform actual Logback initialization; else rely on Logback's default initialization.
        try {
            // Resolve system property placeholders before potentially resolving real path.
            location = ServletContextPropertyUtils.resolvePlaceholders(location);
            // Return a URL (e.g. "classpath:" or "file:") as-is;
            // consider a plain file path as relative to the web application root directory.
            if (!ResourceUtils.isUrl(location)) {
                location = WebUtils.getRealPath(servletContext, location);
            }

            // Write log message to server log.
            servletContext.log("Initializing Logback from [" + location + "]");

            // Initialize
            LogbackConfigurer.initLogging(location);
        } catch (FileNotFoundException ex) {
            throw new IllegalArgumentException("Invalid 'logbackConfigLocation' parameter: " + ex.getMessage());
        } catch (JoranException e) {
            throw new RuntimeException("Unexpected error while configuring logback", e);
        }
    }

    //If SLF4J's java.util.logging bridge is available in the classpath, install it. This will direct any messages
    //from the Java Logging framework into SLF4J. When logging is terminated, the bridge will need to be uninstalled
    try {
        Class<?> julBridge = ClassUtils.forName("org.slf4j.bridge.SLF4JBridgeHandler",
                ClassUtils.getDefaultClassLoader());

        Method removeHandlers = ReflectionUtils.findMethod(julBridge, "removeHandlersForRootLogger");
        if (removeHandlers != null) {
            servletContext.log("Removing all previous handlers for JUL to SLF4J bridge");
            ReflectionUtils.invokeMethod(removeHandlers, null);
        }

        Method install = ReflectionUtils.findMethod(julBridge, "install");
        if (install != null) {
            servletContext.log("Installing JUL to SLF4J bridge");
            ReflectionUtils.invokeMethod(install, null);
        }
    } catch (ClassNotFoundException ignored) {
        //Indicates the java.util.logging bridge is not in the classpath. This is not an indication of a problem.
        servletContext.log("JUL to SLF4J bridge is not available on the classpath");
    }
}

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