/**
* otter所有node节点监控
*
* @author jianghang 2012-8-29 下午01:00:43
* @version 4.1.0
*/
public class NodeMonitor implements Monitor {
private static final Logger logger = LoggerFactory.getLogger(NodeMonitor.class);
private ExecutorService arbitrateExecutor;
private ZkClientx zookeeper = ZooKeeperClient.getInstance();
private List<NodeListener> listeners =
Collections.synchronizedList(new ArrayList<NodeListener>());
private volatile List<Long> aliveNodes = new ArrayList<Long>(); // se模块存活的节点
private IZkChildListener childListener;
public NodeMonitor() {
childListener =
new IZkChildListener() {
public void handleChildChange(String parentPath, List<String> currentChilds)
throws Exception {
if (currentChilds != null) {
initNodes(currentChilds);
}
}
};
List<String> childs =
zookeeper.subscribeChildChanges(ArbitrateConstants.NODE_NID_ROOT, childListener);
if (childs == null) { // 如果为null，代表系统节点为初始化
try {
zookeeper.createPersistent(ArbitrateConstants.NODE_NID_ROOT, true);
} catch (ZkNodeExistsException e) {
// ignore
}
childs = zookeeper.getChildren(ArbitrateConstants.NODE_NID_ROOT);
}
initNodes(childs);
// syncNodes();// 开始监视node节点的变化
MonitorScheduler.register(this);
}
public void reload() {
try {
initNodes(); // 更新数据
} catch (Exception e) {
}
}
public void destory() {
listeners.clear();
zookeeper.unsubscribeChildChanges(ArbitrateConstants.NODE_NID_ROOT, childListener);
MonitorScheduler.unRegister(this);
}
/** 返回当前存活的node列表 */
public List<Long> getAliveNodes(boolean reload) {
if (reload) {
initNodes();
}
return new ArrayList<Long>(aliveNodes);
}
/** 返回当前存活的node列表 */
public List<Long> getAliveNodes() {
return getAliveNodes(false);
}
private void initNodes() {
// 获取一下当前存活的所有node节点，再根据对应pipeline关联的node，检查是否在对应的存活列表里
List<String> nodes = zookeeper.getChildren(ArbitrateConstants.NODE_NID_ROOT);
initNodes(nodes);
}
private synchronized void initNodes(List<String> nodes) {
List<Long> nids = new ArrayList<Long>();
for (String node : nodes) {
if (StringUtils.isNumeric(node)) {
nids.add(Long.valueOf(node));
}
}
Collections.sort(nids);
if (!aliveNodes.equals(nids)) { // 不相同，说明有变化
if (logger.isDebugEnabled()) {
logger.debug("old aliveNodes{} ,current aliveNodes{}", new Object[] {aliveNodes, nids});
}
aliveNodes = nids; // 切换引用，需设置为volatile保证线程安全&可见性
processChanged(nids); // 通知变化
}
}
// private void syncNodes() {
// try {
// List<String> nodes = zookeeper.getChildren(ArbitrateConstants.NODE_NID_ROOT, new AsyncWatcher()
// {
//
// public void asyncProcess(WatchedEvent event) {
// // 出现session expired/connection losscase下，会触发所有的watcher响应，同时老的watcher会继续保留，所以会导致出现多次watcher响应
// boolean dataChanged = event.getType() == EventType.NodeDataChanged
// || event.getType() == EventType.NodeDeleted
// || event.getType() == EventType.NodeCreated
// || event.getType() == EventType.NodeChildrenChanged;
// if (dataChanged) {
// syncNodes();// 继续关注node节点变化
// }
// }
// });
//
// initNodes(nodes);
// } catch (KeeperException e) {
// syncNodes();
// logger.error("", e);
// } catch (InterruptedException e) {
// // ignore
// }
// }
// ======================== listener处理 ======================
public void addListener(NodeListener listener) {
if (logger.isDebugEnabled()) {
logger.debug(
"## pipeline[{}] add listener [{}]", ClassUtils.getShortClassName(listener.getClass()));
}
this.listeners.add(listener);
}
public void removeListener(NodeListener listener) {
if (logger.isDebugEnabled()) {
logger.debug("## remove listener [{}]", ClassUtils.getShortClassName(listener.getClass()));
}
this.listeners.remove(listener);
}
private void processChanged(final List<Long> nodes) {
for (final NodeListener listener : listeners) {
// 异步处理
arbitrateExecutor.submit(
new Runnable() {
public void run() {
listener.processChanged(nodes);
}
});
}
}
// ========= setter ========
public void setArbitrateExecutor(ExecutorService arbitrateExecutor) {
this.arbitrateExecutor = arbitrateExecutor;
}
}
/**
* 查询当前的仲裁器的一些运行状态视图
*
* @author jianghang 2011-9-27 下午05:27:38
* @version 4.0.0
*/
public class ArbitrateViewServiceImpl implements ArbitrateViewService {
private static final String CANAL_PATH = "/otter/canal/destinations/%s";
private static final String CANAL_DATA_PATH = CANAL_PATH + "/%s";
private static final String CANAL_CURSOR_PATH = CANAL_PATH + "/%s/cursor";
private ZkClientx zookeeper = ZooKeeperClient.getInstance();
public MainStemEventData mainstemData(Long channelId, Long pipelineId) {
String path = ManagePathUtils.getMainStem(channelId, pipelineId);
try {
byte[] bytes = zookeeper.readData(path);
return JsonUtils.unmarshalFromByte(bytes, MainStemEventData.class);
} catch (ZkException e) {
return null;
}
}
public Long getNextProcessId(Long channelId, Long pipelineId) {
String processRoot = ManagePathUtils.getProcessRoot(channelId, pipelineId);
IZkConnection connection = zookeeper.getConnection();
// zkclient会将获取stat信息和正常的操作分开，使用原生的zk进行优化
ZooKeeper orginZk = ((ZooKeeperx) connection).getZookeeper();
Stat processParentStat = new Stat();
// 获取所有的process列表
try {
orginZk.getChildren(processRoot, false, processParentStat);
return (Long) ((processParentStat.getCversion() + processParentStat.getNumChildren()) / 2L);
} catch (Exception e) {
return -1L;
}
}
public List<ProcessStat> listProcesses(Long channelId, Long pipelineId) {
List<ProcessStat> processStats = new ArrayList<ProcessStat>();
String processRoot = ManagePathUtils.getProcessRoot(channelId, pipelineId);
IZkConnection connection = zookeeper.getConnection();
// zkclient会将获取stat信息和正常的操作分开，使用原生的zk进行优化
ZooKeeper orginZk = ((ZooKeeperx) connection).getZookeeper();
// 获取所有的process列表
List<String> processNodes = zookeeper.getChildren(processRoot);
List<Long> processIds = new ArrayList<Long>();
for (String processNode : processNodes) {
processIds.add(ManagePathUtils.getProcessId(processNode));
}
Collections.sort(processIds);
for (int i = 0; i < processIds.size(); i++) {
Long processId = processIds.get(i);
// 当前的process可能会有变化
ProcessStat processStat = new ProcessStat();
processStat.setPipelineId(pipelineId);
processStat.setProcessId(processId);
List<StageStat> stageStats = new ArrayList<StageStat>();
processStat.setStageStats(stageStats);
try {
String processPath = ManagePathUtils.getProcess(channelId, pipelineId, processId);
Stat zkProcessStat = new Stat();
List<String> stages = orginZk.getChildren(processPath, false, zkProcessStat);
Collections.sort(stages, new StageComparator());
StageStat prev = null;
for (String stage : stages) { // 循环每个process下的stage
String stagePath = processPath + "/" + stage;
Stat zkStat = new Stat();
StageStat stageStat = new StageStat();
stageStat.setPipelineId(pipelineId);
stageStat.setProcessId(processId);
byte[] bytes = orginZk.getData(stagePath, false, zkStat);
if (bytes != null && bytes.length > 0) {
// 特殊处理zookeeper里的data信息，manager没有对应node中PipeKey的对象，所以导致反序列化会失败，需要特殊处理，删除'@'符号
String json = StringUtils.remove(new String(bytes, "UTF-8"), '@');
EtlEventData data = JsonUtils.unmarshalFromString(json, EtlEventData.class);
stageStat.setNumber(data.getNumber());
stageStat.setSize(data.getSize());
Map exts = new HashMap();
if (!CollectionUtils.isEmpty(data.getExts())) {
exts.putAll(data.getExts());
}
exts.put("currNid", data.getCurrNid());
exts.put("nextNid", data.getNextNid());
exts.put("desc", data.getDesc());
stageStat.setExts(exts);
}
if (prev != null) { // 对应的start时间为上一个节点的结束时间
stageStat.setStartTime(prev.getEndTime());
} else {
stageStat.setStartTime(zkProcessStat.getMtime()); // process的最后修改时间,select
// await成功后会设置USED标志位
}
stageStat.setEndTime(zkStat.getMtime());
if (ArbitrateConstants.NODE_SELECTED.equals(stage)) {
stageStat.setStage(StageType.SELECT);
} else if (ArbitrateConstants.NODE_EXTRACTED.equals(stage)) {
stageStat.setStage(StageType.EXTRACT);
} else if (ArbitrateConstants.NODE_TRANSFORMED.equals(stage)) {
stageStat.setStage(StageType.TRANSFORM);
// } else if
// (ArbitrateConstants.NODE_LOADED.equals(stage)) {
// stageStat.setStage(StageType.LOAD);
}
prev = stageStat;
stageStats.add(stageStat);
}
// 添加一个当前正在处理的
StageStat currentStageStat = new StageStat();
currentStageStat.setPipelineId(pipelineId);
currentStageStat.setProcessId(processId);
if (prev == null) {
byte[] bytes = orginZk.getData(processPath, false, zkProcessStat);
if (bytes == null || bytes.length == 0) {
continue; // 直接认为未使用，忽略之
}
ProcessNodeEventData nodeData =
JsonUtils.unmarshalFromByte(bytes, ProcessNodeEventData.class);
if (nodeData.getStatus().isUnUsed()) { // process未使用,直接忽略
continue; // 跳过该process
} else {
currentStageStat.setStage(StageType.SELECT); // select操作
currentStageStat.setStartTime(zkProcessStat.getMtime());
}
} else {
// 判断上一个节点，确定当前的stage
StageType stage = prev.getStage();
if (stage.isSelect()) {
currentStageStat.setStage(StageType.EXTRACT);
} else if (stage.isExtract()) {
currentStageStat.setStage(StageType.TRANSFORM);
} else if (stage.isTransform()) {
currentStageStat.setStage(StageType.LOAD);
} else if (stage.isLoad()) { // 已经是最后一个节点了
continue;
}
currentStageStat.setStartTime(prev.getEndTime()); // 开始时间为上一个节点的结束时间
}
if (currentStageStat.getStage().isLoad()) { // load必须为第一个process节点
if (i == 0) {
stageStats.add(currentStageStat);
}
} else {
stageStats.add(currentStageStat); // 其他情况都添加
}
} catch (NoNodeException e) {
// ignore
} catch (KeeperException e) {
throw new ArbitrateException(e);
} catch (InterruptedException e) {
// ignore
} catch (UnsupportedEncodingException e) {
// ignore
}
processStats.add(processStat);
}
return processStats;
}
public PositionEventData getCanalCursor(String destination, short clientId) {
String path = String.format(CANAL_CURSOR_PATH, destination, String.valueOf(clientId));
try {
IZkConnection connection = zookeeper.getConnection();
// zkclient会将获取stat信息和正常的操作分开，使用原生的zk进行优化
ZooKeeper orginZk = ((ZooKeeperx) connection).getZookeeper();
Stat stat = new Stat();
byte[] bytes = orginZk.getData(path, false, stat);
PositionEventData eventData = new PositionEventData();
eventData.setCreateTime(new Date(stat.getCtime()));
eventData.setModifiedTime(new Date(stat.getMtime()));
eventData.setPosition(new String(bytes, "UTF-8"));
return eventData;
} catch (Exception e) {
return null;
}
}
public void removeCanalCursor(String destination, short clientId) {
String path = String.format(CANAL_CURSOR_PATH, destination, String.valueOf(clientId));
zookeeper.delete(path);
}
@Override
public void removeCanal(String destination, short clientId) {
String path = String.format(CANAL_DATA_PATH, destination, String.valueOf(clientId));
zookeeper.deleteRecursive(path);
}
public void removeCanal(String destination) {
String path = String.format(CANAL_PATH, destination);
zookeeper.deleteRecursive(path);
}
}