import org.apache.zookeeper.server.quorum.LearnerHandler; //导入依赖的package包/类
public String followerInfo() {
    StringBuilder sb = new StringBuilder();
    for (LearnerHandler handler : leader.getLearners()) {
        sb.append(handler.toString()).append("\n");
    }
    return sb.toString();
}
 

import org.apache.zookeeper.server.quorum.LearnerHandler; //导入依赖的package包/类
static public void logQuorumPacket(Logger log, long mask,
        char direction, QuorumPacket qp)
{
    if (isTraceEnabled(log, mask)) { 
        logTraceMessage(log, mask, direction +
                " " + LearnerHandler.packetToString(qp));
     }
}
 

import org.apache.zookeeper.server.quorum.LearnerHandler; //导入依赖的package包/类
public String followerInfo() {
    StringBuilder sb = new StringBuilder();
    for (LearnerHandler handler : leader.learners) {
        sb.append(handler.toString()).append("\n");
    }
    return sb.toString();
}