Exec.java 文件源码

/**
 * Push and collect logs.
 * @return Logs
 * @throws IOException If fails
 */
private String log() throws IOException {
    final org.apache.log4j.Logger root =
        org.apache.log4j.Logger.getRootLogger();
    final ByteArrayOutputStream baos = new ByteArrayOutputStream();
    final Appender appender = new ThreadAppender(
        new PatternLayout("%t %p %m\n"),
        baos
    );
    root.addAppender(appender);
    try {
        this.pipe.status(this.agent.push(this.events));
        return baos.toString();
    } finally {
        root.removeAppender(appender);
    }
}