状态
- UNKNOWN_STATE ： 未知
- LOOKING_STATE：查找 leader
- LEADING_STATE：leader状态
- FOLLOWING_STATE：跟随状态
- OBSERVING_STATE：观察状态
public class QuorumStats {
private final Provider provider;
public interface Provider {
String UNKNOWN_STATE = "unknown";
String LOOKING_STATE = "leaderelection";
String LEADING_STATE = "leading";
String FOLLOWING_STATE = "following";
String OBSERVING_STATE = "observing";
String[] getQuorumPeers();
String getServerState();
}
protected QuorumStats(Provider provider) {
this.provider = provider;
}
public String getServerState() {
return provider.getServerState();
}
public String[] getQuorumPeers() {
return provider.getQuorumPeers();
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder(super.toString());
String state = getServerState();
if (state.equals(Provider.LEADING_STATE)) {
sb.append("Followers:");
for (String f : getQuorumPeers()) {
sb.append(" ").append(f);
}
sb.append("\n");
} else if (state.equals(Provider.FOLLOWING_STATE) || state.equals(Provider.OBSERVING_STATE)) {
sb.append("Leader: ");
String[] ldr = getQuorumPeers();
if (ldr.length > 0) {
sb.append(ldr[0]);
} else {
sb.append("not connected");
}
sb.append("\n");
}
return sb.toString();
}
}