List of usage examples for org.apache.zookeeper KeeperException code
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From source file:io.reign.data.ZkMultiMapData.java
License:Apache License
@Override public synchronized List<String> keys() { List<String> keys = null; zkClientMultiDataUtil.lockForRead(readWriteLock, absoluteBasePath, this); try {//from w w w.j a v a 2 s . c om // if (readWriteLock == null) { // keys = zkClientMultiDataUtil.getChildListFromPathCache(absoluteBasePath, -1); // } if (keys == null) { // invalid or non-existent value in cache, so get direct Stat stat = new Stat(); keys = zkClient.getChildren(absoluteBasePath, true, stat); // pathCache.put(absoluteBasePath, stat, null, keys); } else { logger.trace("Got from cache: path={}; keys={}", absoluteBasePath, keys); } } catch (KeeperException e) { if (e.code() == KeeperException.Code.NONODE) { if (logger.isDebugEnabled()) { logger.debug("Path does not exist for data update: " + e + ": path=" + absoluteBasePath); } } else { logger.error("" + e, e); } } catch (InterruptedException e) { logger.warn("Interrupted: " + e, e); } finally { zkClientMultiDataUtil.unlockForRead(readWriteLock); } return keys != null ? keys : Collections.EMPTY_LIST; }
From source file:io.reign.metrics.MetricsService.java
License:Apache License
MetricsData getMetricsFromDataNode(String clusterId, String serviceId, String dataNode) {
PathScheme pathScheme = getContext().getPathScheme();
String dataPath = null;/* w w w . j ava 2 s . c o m*/
if (dataNode != null) {
dataPath = pathScheme.getAbsolutePath(PathType.METRICS,
pathScheme.joinTokens(clusterId, serviceId, dataNode));
} else {
dataPath = pathScheme.getAbsolutePath(PathType.METRICS, pathScheme.joinTokens(clusterId, serviceId));
}
byte[] bytes = null;
try {
Stat stat = new Stat();
bytes = getContext().getZkClient().getData(dataPath, true, stat);
logger.info("getMetricsFromDataNode(): dataPath={}; data={}", dataPath,
new String(bytes).replace("\n", ""));
MetricsData metricsData = JacksonUtil.getObjectMapper().readValue(bytes, MetricsData.class);
metricsData.setLastUpdatedTimestamp(stat.getMtime());
return metricsData;
} catch (KeeperException e) {
if (e.code() == KeeperException.Code.NONODE) {
return null;
}
logger.warn(
"Error retrieving data node: clusterId=" + clusterId + "; serviceId=" + serviceId
+ "; dataPath=" + dataPath + "; dataAsString=" + (new String(bytes, UTF_8)) + ": " + e,
e);
throw new ReignException("Error retrieving data node: clusterId=" + clusterId + "; serviceId="
+ serviceId + "; dataPath=" + dataPath + "; dataAsString=" + (new String(bytes, UTF_8)), e);
} catch (UnrecognizedPropertyException e) {
logger.warn(
"Error retrieving data node: clusterId=" + clusterId + "; serviceId=" + serviceId
+ "; dataPath=" + dataPath + "; dataAsString=" + (new String(bytes, UTF_8)) + ": " + e,
e);
return null;
} catch (Exception e) {
logger.warn(
"Error retrieving data node: clusterId=" + clusterId + "; serviceId=" + serviceId
+ "; dataPath=" + dataPath + "; dataAsString=" + (new String(bytes, UTF_8)) + ": " + e,
e);
throw new ReignException("Error retrieving data node: clusterId=" + clusterId + "; serviceId="
+ serviceId + "; dataPath=" + dataPath + "; dataAsString=" + (new String(bytes, UTF_8)), e);
}
}
From source file:io.reign.metrics.MetricsService.java
License:Apache License
@Override public ResponseMessage handleMessage(RequestMessage requestMessage) { ResponseMessage responseMessage = new SimpleResponseMessage(); try {//from w ww . ja v a 2s .c o m if (logger.isTraceEnabled()) { logger.trace("Received message: nodeId={}; request='{}:{}'", requestMessage.getSenderId(), requestMessage.getTargetService(), requestMessage.getBody()); } /** preprocess request **/ ParsedRequestMessage parsedRequestMessage = new ParsedRequestMessage(requestMessage); String resource = parsedRequestMessage.getResource(); // strip beginning and ending slashes "/" boolean endsWithSlash = false; if (resource.startsWith("/")) { resource = resource.substring(1); } if (resource.endsWith("/")) { endsWithSlash = true; resource = resource.substring(0, resource.length() - 1); } /** get response **/ if ("observe".equals(parsedRequestMessage.getMeta())) { responseMessage = new SimpleResponseMessage(ResponseStatus.OK); String[] tokens = getPathScheme().tokenizePath(resource); if (tokens.length == 2) { this.observe(tokens[0], tokens[1], this.getClientObserver(parsedRequestMessage.getSenderId(), tokens[0], tokens[1], null)); } else if (tokens.length == 3) { this.observe(tokens[0], tokens[1], this.getClientObserver(parsedRequestMessage.getSenderId(), tokens[0], tokens[1], tokens[2])); } else { responseMessage.setComment("Observing not supported: " + resource); } } else if ("observe-stop".equals(parsedRequestMessage.getMeta())) { responseMessage = new SimpleResponseMessage(ResponseStatus.OK); String absolutePath = getPathScheme().getAbsolutePath(PathType.METRICS, resource); getContext().getObserverManager().removeByOwnerId(parsedRequestMessage.getSenderId().toString(), absolutePath); } else { if (resource.length() == 0) { // list available clusters String path = getContext().getPathScheme().getAbsolutePath(PathType.METRICS); List<String> clusterList = getContext().getZkClient().getChildren(path, false); responseMessage.setBody(clusterList); } else { String[] tokens = getPathScheme().tokenizePath(resource); // logger.debug("tokens.length={}", tokens.length); if (tokens.length == 1) { // list available services String path = getContext().getPathScheme().getAbsolutePath(PathType.METRICS, tokens[0]); List<String> serviceList = getContext().getZkClient().getChildren(path, false); responseMessage.setBody(serviceList); if (serviceList == null) { responseMessage.setComment("Not found: " + resource); } } else if (tokens.length == 2) { if (endsWithSlash) { // list available nodes for a given service String path = getContext().getPathScheme().getAbsolutePath(PathType.METRICS, tokens[0], tokens[1]); List<String> nodeList = getContext().getZkClient().getChildren(path, false); responseMessage.setBody(nodeList); if (nodeList == null) { responseMessage.setComment("Not found: " + resource); } } else { // get metrics data for service MetricsData metricsData = getMetricsFromDataNode(tokens[0], tokens[1], null); if (metricsData == null) { responseMessage.setComment("Not found: " + resource); } else { responseMessage.setBody(metricsData); } } } else if (tokens.length == 3) { // get metrics data for single data node MetricsData metricsData = getMetricsFromDataNode(tokens[0], tokens[1], tokens[2]); if (metricsData == null) { responseMessage.setComment("Not found: " + resource); } else { responseMessage.setBody(metricsData); } } } } // if observe } catch (KeeperException e) { if (e.code() == KeeperException.Code.NONODE) { responseMessage.setBody(Collections.EMPTY_LIST); } else { responseMessage.setStatus(ResponseStatus.ERROR_UNEXPECTED, "" + e); } } catch (Exception e) { logger.error("" + e, e); responseMessage.setStatus(ResponseStatus.ERROR_UNEXPECTED, "" + e); } responseMessage.setId(requestMessage.getId()); return responseMessage; }
From source file:io.reign.metrics.MetricsService.java
License:Apache License
/** * Get metrics data for this service node (self) for current interval. */// www. j a va2 s .c o m public MetricsData getMyMetrics(String clusterId, String serviceId) { String key = clusterId + "/" + serviceId + "/" + getContext().getZkNodeId().getPathToken(); ExportMeta exportMeta = exportPathMap.get(key); if (exportMeta == null) { logger.trace( "MetricsData not found: data has not been exported: clusterId={}; serviceId={}; exportMeta={}", clusterId, serviceId, exportMeta); return null; } if (exportMeta.dataPath == null) { logger.trace( "MetricsData not found: waiting for data to be reported in ZK: clusterId={}; serviceId={}; exportMeta.dataPath={}", clusterId, serviceId, exportMeta.dataPath); synchronized (exportMeta) { try { exportMeta.wait(); } catch (InterruptedException e) { logger.warn("Interrupted while waiting: " + e, e); } } } try { logger.debug("Retrieving metrics: path={}", exportMeta.dataPath); Stat stat = new Stat(); byte[] bytes = getContext().getZkClient().getData(exportMeta.dataPath, true, stat); MetricsData metricsData = JacksonUtil.getObjectMapper().readValue(bytes, MetricsData.class); metricsData.setClusterId(clusterId); metricsData.setServiceId(serviceId); metricsData.setLastUpdatedTimestamp(stat.getMtime()); return metricsData; } catch (KeeperException e) { if (e.code() == KeeperException.Code.NONODE) { return null; } throw new ReignException(e); } catch (Exception e) { throw new ReignException(e); } }
From source file:io.reign.ObserverManager.java
License:Apache License
public void put(String path, T observer) { String ownerId = observer.getOwnerId(); Set<T> observerSet = getObserverSet(path, true); try {//from www. ja va 2 s . co m // decorate observer with data about the path so we can handle // notifications correctly byte[] data = zkClient.getData(path, true, new Stat()); List<String> childList = zkClient.getChildren(path, true); observer.setPath(path); observer.setData(data); observer.setChildList(childList); observerSet.add(observer); // register with owner (so we can remove all later if a client // disconnects, etc.) if (ownerId != null) { Set<T> ownerObserverSet = getOwnerObserverSet(ownerId, true); ownerObserverSet.add(observer); } logger.info( "Added observer: observer.hashCode()={}; observer.ownerId={}; path={}; pathObserverCount={}", new Object[] { observer.hashCode(), observer.getOwnerId(), path, observerSet.size() }); } catch (KeeperException e) { if (e.code() == Code.NONODE) { // set up watch on that node try { observer.setPath(path); observer.setData(null); observer.setChildList(Collections.EMPTY_LIST); observerSet.add(observer); // register with owner (so we can remove all later if a // client disconnects, etc.) if (ownerId != null) { Set<T> ownerObserverSet = getOwnerObserverSet(ownerId, true); ownerObserverSet.add(observer); } zkClient.exists(path, true); logger.info( "Added observer for nonexistent path: observer.hashCode()={}; path={}; pathObserverCount={}", new Object[] { observer.hashCode(), path, observerSet.size() }); } catch (Exception e1) { logger.error("Unable to add observer: path=" + path + "; observerType=" + observer.getClass().getSimpleName(), e); } } else { logger.error("Unable to add observer: path=" + path + "; observerType=" + observer.getClass().getSimpleName(), e); } } catch (Exception e) { logger.error("Unable to add observer: path=" + path + "; observerType=" + observer.getClass().getSimpleName(), e); } }
From source file:io.reign.ObserverManager.java
License:Apache License
@Override public void nodeChildrenChanged(final WatchedEvent event) { delegatorExecutorService.submit(new Runnable() { public void run() { String path = event.getPath(); logger.debug("Notifying ALL observers: nodeChildrenChanged: path={}", path); try { Set<T> observerSet = getObserverSet(path, false); if (observerSet.size() > 0) { List<String> updatedChildList = null; try { updatedChildList = zkClient.getChildren(path, true); } catch (KeeperException e) { if (e.code() != KeeperException.Code.NONODE) { throw e; }/*from ww w .ja v a 2 s. co m*/ } if (updatedChildList == null) { updatedChildList = Collections.EMPTY_LIST; } for (final T observer : observerSet) { logger.trace("Notifying observer: observer.hashCode()={}", observer.hashCode()); synchronized (observer) { final List<String> previousChildList = observer.getChildList(); boolean updatedValueDiffers = childListsDiffer(updatedChildList, previousChildList); observer.setChildList(updatedChildList); updateObserver(path, observer); if (updatedValueDiffers) { observer.nodeChildrenChanged(updatedChildList, previousChildList); } } } // for scheduleCheck(event); } // if observerSet > 0 } catch (KeeperException e) { logger.warn("Unable to notify observers: path=" + path, e); } catch (Exception e) { logger.warn("Unable to notify observers: path=" + path, e); } } }); }
From source file:io.reign.presence.PresenceService.java
License:Apache License
public List<String> getClusters() { /** get node data from zk **/ String path = getPathScheme().getAbsolutePath(PathType.PRESENCE); List<String> children = Collections.EMPTY_LIST; try {/*from w w w . j ava 2 s. com*/ Stat stat = new Stat(); children = getZkClient().getChildren(path, true, stat); // getPathCache().put(path, stat, null, children); } catch (KeeperException e) { if (e.code() == Code.NONODE) { logger.warn("lookupClusters(): " + e + ": node does not exist: path={}", path); } else { logger.warn("lookupClusters(): " + e, e); } return Collections.EMPTY_LIST; } catch (InterruptedException e) { logger.warn("lookupClusters(): " + e, e); return Collections.EMPTY_LIST; } return children != null ? children : Collections.EMPTY_LIST; }
From source file:io.reign.presence.PresenceService.java
License:Apache License
public List<String> getServices(String clusterId) { /** get node data from zk **/ if (!getPathScheme().isValidToken(clusterId)) { throw new IllegalArgumentException("Invalid path token: pathToken='" + clusterId + "'"); }/*from w ww .j av a 2 s . c o m*/ String path = getPathScheme().getAbsolutePath(PathType.PRESENCE, clusterId); List<String> children = Collections.EMPTY_LIST; try { Stat stat = new Stat(); children = getZkClient().getChildren(path, true, stat); } catch (KeeperException e) { if (e.code() == Code.NONODE) { logger.warn("lookupServices(): " + e + ": node does not exist: path={}", path); } else { logger.warn("lookupServices(): " + e, e); } return Collections.EMPTY_LIST; } catch (InterruptedException e) { logger.warn("lookupServices(): " + e, e); return Collections.EMPTY_LIST; } return children; }
From source file:io.reign.presence.PresenceService.java
License:Apache License
ServiceInfo getServiceInfo(String clusterId, String serviceId, PresenceObserver<ServiceInfo> observer,
DataSerializer<Map<String, String>> nodeAttributeSerializer) {
/** add observer if given **/
if (observer != null) {
this.observe(clusterId, serviceId, observer);
}/*from ww w. j a v a2s. co m*/
/** get node data from zk **/
String servicePath = getPathScheme().joinTokens(clusterId, serviceId);
String path = getPathScheme().getAbsolutePath(PathType.PRESENCE, servicePath);
boolean error = false;
List<String> children = null;
try {
// get from ZK
Stat stat = new Stat();
children = getZkClient().getChildren(path, true, stat);
} catch (KeeperException e) {
error = true;
if (e.code() == Code.NONODE) {
// set up watch on that node
try {
getZkClient().exists(path, true);
} catch (Exception e1) {
logger.error("lookupServiceInfo(): error trying to watch node: " + e1 + ": path=" + path,
e1);
}
logger.debug(
"lookupServiceInfo(): error trying to fetch service info: {}: node does not exist: path={}",
e.getMessage(), path);
} else {
logger.error("lookupServiceInfo(): error trying to fetch service info: " + e, e);
}
} catch (Exception e) {
logger.warn("lookupServiceInfo(): error trying to fetch service info: " + e, e);
error = true;
}
/** build service info **/
ServiceInfo result = null;
if (!error) {
result = new StaticServiceInfo(clusterId, serviceId, children);
}
return result;
}
From source file:io.reign.presence.PresenceService.java
License:Apache License
NodeInfo getNodeInfo(String clusterId, String serviceId, String nodeId, PresenceObserver<NodeInfo> observer,
DataSerializer<Map<String, String>> nodeAttributeSerializer) {
/** get node data from zk **/
String nodePath = getPathScheme().joinTokens(clusterId, serviceId, nodeId);
String path = getPathScheme().getAbsolutePath(PathType.PRESENCE, nodePath);
/** add observer if passed in **/
if (observer != null) {
this.observe(clusterId, serviceId, nodeId, observer);
}//from w ww.j av a2s .co m
/** fetch data **/
boolean error = false;
byte[] bytes = null;
try {
// populate from ZK
Stat stat = new Stat();
bytes = getZkClient().getData(path, true, stat);
} catch (KeeperException e) {
if (e.code() == Code.NONODE) {
// set up watch on that node
try {
getZkClient().exists(path, true);
} catch (Exception e1) {
logger.error("lookupNodeInfo(): error trying to watch node: " + e1 + ": path=" + path, e1);
}
logger.debug(
"lookupNodeInfo(): error trying to fetch node info: {}: node does not exist: path={}",
e.getMessage(), path);
} else {
logger.error("lookupNodeInfo(): error trying to fetch node info: " + e, e);
}
error = true;
} catch (Exception e) {
logger.warn("lookupNodeInfo(): error trying to fetch node info: " + e, e);
error = true;
}
/** build node info **/
NodeInfo result = null;
if (!error) {
try {
result = new StaticNodeInfo(clusterId, serviceId,
getContext().getNodeIdFromZk(new ZkNodeId(nodeId, null)),
bytes != null ? nodeAttributeSerializer.deserialize(bytes) : Collections.EMPTY_MAP);
} catch (Exception e) {
throw new IllegalStateException(
"lookupNodeInfo(): error trying to fetch node info: path=" + path + ": " + e, e);
}
}
return result;
}