import org.avaje.agentloader.AgentLoader; //导入依赖的package包/类
@Override
public void run(final Set<String> packages) {
  try {
    String params = "debug=0;packages=" + packages.stream()
        .map(pkg -> pkg + ".**")
        .collect(Collectors.joining(","));

    URL resource = getClass().getResource(transformerClass);
    String location = resource.getPath();
    int idx = location.indexOf(".jar!");
    if (idx > 0) {
      location = location.substring(0, idx + ".jar".length());
    }
    File jarLocation = location.startsWith("file:")
        ? new File(URI.create(location))
        : new File(location);

    AgentLoader.loadAgent(jarLocation.getAbsolutePath(), params);
  } catch (Exception ex) {
    log.trace("agent already loaded", ex);
  }
}
 

import org.avaje.agentloader.AgentLoader; //导入依赖的package包/类
/**
 * Load the agent from the classpath using its name and passing params.
 */
public synchronized static boolean loadAgentFromClasspath(String agentName, String params) {
    if (loaded.contains(agentName)) {
        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug(S.concat("agent already loaded: ", agentName));
        }
        // the agent is already loaded
        return true;
    }
    try {
        // Search for the agent jar in the classpath
        ClassLoader cl0 = AgentLoader.class.getClassLoader();
        if (!(cl0 instanceof URLClassLoader)) {
            cl0 = cl0.getParent();
        }
        if (cl0 instanceof URLClassLoader) {
            URLClassLoader cl = (URLClassLoader) (cl0);
            for (URL url : cl.getURLs()) {
                if (isMatch(url, agentName)) {
                    // We have found the agent jar in the classpath
                    String fullName = url.toURI().getPath();
                    if (fullName.startsWith("/") && isWindows()) {
                        fullName = fullName.substring(1);
                    }
                    if (LOGGER.isTraceEnabled()) {
                        LOGGER.trace(S.concat("loading agent: ", fullName));
                    }
                    loadAgent(fullName, params);
                    loaded.add(agentName);
                    return true;
                }
            }
        }

        // Agent not found and not loaded
        if (LOGGER.isTraceEnabled()) {
            LOGGER.trace("agent not found");
        }
        return false;

    } catch (URISyntaxException use) {
        throw new RuntimeException(use);
    }
}
 

import org.avaje.agentloader.AgentLoader; //导入依赖的package包/类
/**
 * This is needed to be done once to enhance all the entity objects for Ebean ORM.
 */
@BeforeClass
public static void runOnce() {
    AgentLoader.loadAgentFromClasspath("avaje-ebeanorm-agent", "debug=1");
}