commons模块阅读7:ClusterInfo

说明

作用如下:

保存cluster信息提供给网络传输
属性brokerAddrTable用于记录每个brokerName对应的BrokerData信息
属性clusterAddrTable用于记录每个clusterName对应的brokerName集合

把前面brokerData的图再拿来用,方便理解cluster，brokerName与BrokerData的关系

cluster与brokerName,BrokerData关系

源码

直接贴了也很简单

public class ClusterInfo extends RemotingSerializable {
    private HashMap<String/* brokerName */, BrokerData> brokerAddrTable;//key是brokerName
    private HashMap<String/* clusterName */, Set<String/* brokerName */>> clusterAddrTable;//key是clusterName

    public HashMap<String, BrokerData> getBrokerAddrTable() {
        return brokerAddrTable;
    }

    public void setBrokerAddrTable(HashMap<String, BrokerData> brokerAddrTable) {
        this.brokerAddrTable = brokerAddrTable;
    }

    public HashMap<String, Set<String>> getClusterAddrTable() {
        return clusterAddrTable;
    }

    public void setClusterAddrTable(HashMap<String, Set<String>> clusterAddrTable) {
        this.clusterAddrTable = clusterAddrTable;
    }

    //获取cluster下所有brokerName对应的brokerData的所有地址
    public String[] retrieveAllAddrByCluster(String cluster) {
        List<String> addrs = new ArrayList<String>();
        if (clusterAddrTable.containsKey(cluster)) {
            Set<String> brokerNames = clusterAddrTable.get(cluster);
            for (String brokerName : brokerNames) {
                BrokerData brokerData = brokerAddrTable.get(brokerName);
                if (null != brokerData) {
                    addrs.addAll(brokerData.getBrokerAddrs().values());
                }
            }
        }

        return addrs.toArray(new String[] {});
    }

    //获取所有cluster名字
    public String[] retrieveAllClusterNames() {
        return clusterAddrTable.keySet().toArray(new String[] {});
    }
}

主要注意retrieveAllAddrByCluster 和 retrieveAllClusterNames两个方法就行了