3銆丵uorumPeer瀵硅璇鋒眰榪涜鎶曠エ錛屽鏋滄秷鎭殑txid澶т簬QuorumPeer鐨則xid鍒欓氳繃璇ユ姇紲紝鍚﹀垯鍙嶅璇ユ姇紲?br />4銆乴eader鏍規嵁鎵鏈夌殑QuorumPeer鎶曠エ緇撴灉榪涜璁＄畻錛屽鏋滄湁涓鍗婁互涓婄殑QuorumPeer閫氳繃鍒欐帴鍙楁彁鍑鴻呯殑璇鋒眰錛屽惁鍒欐嫆緇濇彁鍑鴻呯殑璇鋒眰
switch (message.getType())
{
case QuorumCode.ask://璇㈤棶綾誨瀷 //璇㈤棶璇ヤ簨鍔℃槸鍚﹀彲鎿嶄綔 Ask task=new Ask(message,sc); My.executor.execute(task); m.setCode(JuiceCode.OK); break; case QuorumCode.vote://鎶曠エ綾誨瀷 if(My.txid>=message.getTxid()) //鎷掔粷 m.setCode(JuiceCode.ERROR); else
{
//閫氳繃 m.setCode(JuiceCode.OK); My.updateMyTxid(message.getTxid());
} break; case QuorumCode.ping://ping m.setCode(JuiceCode.OK); m.setMyid(message.getMyid()); break;
} public static boolean sendAndVote(Message m) throws IOException { m.setType(QuorumCode.vote); Map<Integer,Response> mp=new TreeMap<Integer,Response>(); for(Map.Entry<Integer,NIOClient> entry:voteClientMap.entrySet()) { NIOClient client=entry.getValue(); Response response=client.send(ByteUtil.getBytes(m)); mp.put(entry.getKey(), response); } Map<Integer,Message> vote=new TreeMap<Integer,Message>(); for(Map.Entry<Integer,Response> entry:mp.entrySet()) vote.put(entry.getKey(), (Message)ByteUtil.getObject(entry.getValue().getData())); int ok=0; for(Map.Entry<Integer,Message> entry:vote.entrySet()) { Message f=entry.getValue(); if(f.getCode()==JuiceCode.OK) ok++; } if(ok/(vote.size()*1.0)>1/2.0) return true; return false; }]]>
3銆佸鏋滄姇紲ㄦ暟瓚呰繃1/2鍒欓夎id涓簂eader
4銆佸鏋滄渶澶ф姇紲ㄦ暟id娌℃湁瓚呰繃1/2,鍒欐帹鑽恡xid鏈澶х殑id涓簂eader
5銆佽綆楀嚭鏈澶х殑txid鍙婂叾鏈嶅姟鍣╥d
6銆佽綆楀嚭鏈澶х殑txid鏈夊嚑涓?br />7銆佸鏋滄渶澶xid瓚呰繃涓涓紝鍒欐瘮杈冩湇鍔″櫒id錛屾帹鑽愭湇鍔d鏈澶х殑涓簂eader
8銆佸彂璧風浜岃疆鎶曠エ
Java瀹炵幇浠ｇ爜濡備笅錛?br />
/** * 閫変婦leader * @param vote 鎶曠エ淇℃伅 * @return */ public int forLeader(Map<Integer,Notification> vote) { //緇熻leader鎶曠エ鏁?/span> TreeMap<Integer,Integer> tmap=new TreeMap<Integer,Integer>(); for(Map.Entry<Integer,Notification> entry:vote.entrySet()) { Notification nf=entry.getValue(); if(tmap.containsKey(nf.leader)) tmap.put(nf.leader, tmap.get(nf.leader)+1); else tmap.put(nf.leader, 1); } //璁＄畻鍑烘姇紲ㄦ暟鏈澶х殑id int a=0; int l=0; for(Map.Entry<Integer,Integer> entry:tmap.entrySet()) { if(entry.getValue()>a) { a=entry.getValue(); l=entry.getKey(); } } //濡傛灉鎶曠エ鏁拌秴榪?/2鍒欓夎id涓簂eader if(a/(My.serverList.size()*1.0)>1/2.0) { //閫夊嚭leader if(l==My.myid) My.myServerState=ServerState.LEADING; else My.myServerState=ServerState.FLLOWING; My.leader=l; return -1; } //濡傛灉鏈澶ф姇紲ㄦ暟leader娌℃湁瓚呰繃1/2,鍒欐帹鑽恡xid鏈澶х殑id涓簂eader //璁＄畻鍑烘渶澶х殑txid鍙婂叾鏈嶅姟鍣╥d long txid=0; int leader=0; for(Map.Entry<Integer,Notification> entry:vote.entrySet()) { if(entry.getValue().txid>txid) { leader=entry.getKey(); txid=entry.getValue().txid; } } //璁＄畻鍑烘渶澶х殑txid鏈夊嚑涓?/span> Map<Integer,Notification> vte=new TreeMap<Integer,Notification>(); for(Map.Entry<Integer,Notification> entry:vote.entrySet()) { if(entry.getValue().txid==txid) { vte.put(entry.getValue().id, entry.getValue()); } } //濡傛灉瓚呰繃涓涓紝鍒欐瘮杈冩湇鍔″櫒id錛屾帹鑽愭湇鍔d鏈澶х殑涓簂eader if(vte.size()>1) { for(Map.Entry<Integer,Notification> entry:vte.entrySet()) { if(entry.getValue().id>leader) leader=entry.getKey(); } } return leader; } }]]>