List of usage examples for org.apache.zookeeper KeeperException getMessage
@Override
public String getMessage()
From source file:fr.eurecom.hybris.mds.ZkRmds.java
License:Apache License
@Override public boolean tsWrite(String key, Metadata md, long zkVersion) throws HybrisException { String path = this.storageRoot + "/" + key; try {//w w w. jav a 2s.c o m if (zkVersion == NONODE) { this.zkCli.create().forPath(path, md.serialize()); logger.debug("ZNode {} created.", path); return false; } else { this.zkCli.setData().withVersion((int) zkVersion).forPath(path, md.serialize()); logger.debug("ZNode {} modified.", path); return true; } } catch (KeeperException e) { // NONODE exception should not happen // since we set a tombstone value upon // deletion if (e.code() == KeeperException.Code.NODEEXISTS || // multiple // clients tried // to create e.code() == KeeperException.Code.BADVERSION) { // or modify // the same // znode // concurrently Stat stat = new Stat(); byte[] newValue = null; try { newValue = this.zkCli.getData().storingStatIn(stat).forPath(path); } catch (Exception e1) { throw new HybrisException(e1); } Metadata newmd = new Metadata(newValue); if (md.getTs().isGreater(newmd.getTs())) { logger.debug("Found smaller version ({}) writing {}: retrying.", newmd.getTs(), key); return this.tsWrite(key, md, stat.getVersion()); } else { logger.debug("Found greater version ({}) writing {}: overwritten.", newmd.getTs(), key); return false; } } else { logger.error("Could not write ZNode " + key); throw new HybrisException("Could not write the ZNode " + key, e); } } catch (Exception e) { logger.error("Could not write ZNode " + key, e); throw new HybrisException("Could not write ZNode " + key + ": " + e.getMessage(), e); } }
From source file:fr.eurecom.hybris.mds.ZkRmds.java
License:Apache License
@Override public boolean tsMultiWrite(LinkedHashMap<String, Metadata> mdMap, LinkedHashMap<String, Stat> statMap) throws HybrisException { try {/* w w w.j a v a2s . c o m*/ CuratorTransaction curatorTransaction = this.zkCli.inTransaction(); for (Entry<String, Metadata> entry : mdMap.entrySet()) { int ver = statMap.get(entry.getKey()).getVersion(); if (ver == NONODE) { curatorTransaction = curatorTransaction.create() .forPath(this.storageRoot + "/" + entry.getKey(), entry.getValue().serialize()).and(); } else { curatorTransaction = curatorTransaction.setData().withVersion(ver) .forPath(this.storageRoot + "/" + entry.getKey(), entry.getValue().serialize()).and(); } } if (curatorTransaction instanceof CuratorTransactionFinal) ((CuratorTransactionFinal) curatorTransaction).commit(); return true; // XXX } catch (KeeperException e) { // NONODE exception should not happen // since we set a tombstone value upon // deletion // XXX see if it is worth retrying logger.error("Could not perform transactional timestamped write."); throw new HybrisException("Could not perform transactional timestamped write: " + e.getMessage(), e); } catch (Exception e) { logger.error("Could not perform transactional timestamped write.", e); throw new HybrisException("Could not perform transactional timestamped write: " + e.getMessage(), e); } }
From source file:fr.eurecom.hybris.mds.ZkRmds.java
License:Apache License
public Metadata tsRead(String key, Stat stat) throws HybrisException { String path = this.storageRoot + "/" + key; try {/*ww w .j av a 2s. co m*/ if (quorumRead) this.zkCli.setData().forPath(this.storageRoot, new byte[] { (byte) 0x00 }); else this.zkCli.sync().forPath(path); byte[] rawMd = this.zkCli.getData().storingStatIn(stat).forPath(path); return new Metadata(rawMd); } catch (KeeperException e) { if (e.code() == KeeperException.Code.NONODE) return null; else { logger.error("Could not read ZNode " + path, e); throw new HybrisException("Could not read the ZNode " + path, e); } } catch (Exception e) { logger.error("Could not read ZNode " + path, e); throw new HybrisException("Could not read the ZNode " + path + e.getMessage(), e); } }
From source file:fr.eurecom.hybris.mds.ZkRmds.java
License:Apache License
public Metadata tsRead(String key, Stat stat, HybrisWatcher watcher) throws HybrisException { String path = this.storageRoot + "/" + key; try {/*www. j a v a 2 s .co m*/ if (quorumRead) this.zkCli.setData().forPath(this.storageRoot, new byte[] { (byte) 0x00 }); else this.zkCli.sync().forPath(path); byte[] rawMd = this.zkCli.getData().storingStatIn(stat).usingWatcher(watcher).forPath(path); return new Metadata(rawMd); } catch (KeeperException e) { if (e.code() == KeeperException.Code.NONODE) return null; else { logger.error("Could not read ZNode " + path, e); throw new HybrisException("Could not read the ZNode " + path, e); } } catch (Exception e) { logger.error("Could not read ZNode " + path, e); throw new HybrisException("Could not read the ZNode " + path + e.getMessage(), e); } }
From source file:io.reign.conf.ConfService.java
License:Apache License
<T> T getConfValue(String absolutePath, DataSerializer<T> confSerializer) {
throwExceptionIfInvalidConfPath(absolutePath);
byte[] bytes = null;
T result = null;//w ww. j a v a 2 s . c om
try {
// not in cache, so load from ZK
Stat stat = new Stat();
bytes = getZkClient().getData(absolutePath, true, stat);
result = bytes != null ? confSerializer.deserialize(bytes) : null;
} catch (KeeperException e) {
if (e.code() == Code.NONODE) {
// set up watch on that node
try {
getZkClient().exists(absolutePath, true);
} catch (Exception e1) {
logger.error("getConfValue(): error trying to watch node: " + e1 + ": path=" + absolutePath,
e1);
}
logger.debug(
"getConfValue(): error trying to fetch node info: {}: node does not exist: path={}",
e.getMessage(), absolutePath);
} else {
logger.error("getConfValue(): error trying to fetch node info: " + e, e);
}
} catch (Exception e) {
logger.error("getConfValue(): error trying to fetch node info: " + e, e);
}
return result;
}
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 www. j a v a2 s. c om*/
/** 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 a va 2 s . c o 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;
}
From source file:io.s4.comm.zk.ZkTaskManager.java
License:Open Source License
/** * This will block the process thread from starting the task, when it is * unblocked it will return the data stored in the task node. This data can * be used by the This call assumes that the tasks are already set up * //from w ww .jav a 2 s. c o m * @return Object containing data related to the task */ @Override public Object acquireTask(Map<String, String> customTaskData) { while (true) { synchronized (mutex) { try { Stat tExists = zk.exists(tasksListRoot, false); if (tExists == null) { logger.error("Tasks znode:" + tasksListRoot + " not setup.Going to wait"); tExists = zk.exists(tasksListRoot, true); if (tExists == null) { mutex.wait(); } continue; } Stat pExists = zk.exists(processListRoot, false); if (pExists == null) { logger.error("Process root znode:" + processListRoot + " not setup.Going to wait"); pExists = zk.exists(processListRoot, true); if (pExists == null) { mutex.wait(); } continue; } // setting watch true to tasks node will trigger call back // if there is any change to task node, // this is useful to add additional tasks List<String> tasks = zk.getChildren(tasksListRoot, true); List<String> processes = zk.getChildren(processListRoot, true); if (processes.size() < tasks.size()) { ArrayList<String> tasksAvailable = new ArrayList<String>(); for (int i = 0; i < tasks.size(); i++) { tasksAvailable.add("" + i); } if (processes != null) { for (String s : processes) { String taskId = s.split("-")[1]; tasksAvailable.remove(taskId); } } // try pick up a random task Random random = new Random(); int id = Integer.parseInt(tasksAvailable.get(random.nextInt(tasksAvailable.size()))); String pNode = processListRoot + "/" + "task-" + id; String tNode = tasksListRoot + "/" + "task-" + id; Stat pNodeStat = zk.exists(pNode, false); if (pNodeStat == null) { Stat tNodeStat = zk.exists(tNode, false); byte[] bytes = zk.getData(tNode, false, tNodeStat); Map<String, Object> map = (Map<String, Object>) JSONUtil .getMapFromJson(new String(bytes)); // if(!map.containsKey("address")){ // map.put("address", // InetAddress.getLocalHost().getHostName()); // } if (customTaskData != null) { for (String key : customTaskData.keySet()) { if (!map.containsKey(key)) { map.put(key, customTaskData.get(key)); } } } map.put("taskSize", "" + tasks.size()); map.put("tasksRootNode", tasksListRoot); map.put("processRootNode", processListRoot); String create = zk.create(pNode, JSONUtil.toJsonString(map).getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL); logger.info("Created process Node:" + pNode + " :" + create); return map; } } else { // all the tasks are taken up, will wait for the logger.info("No task available to take up. Going to wait"); mutex.wait(); } } catch (KeeperException e) { logger.info("Warn:mostly ignorable " + e.getMessage(), e); } catch (InterruptedException e) { logger.info("Warn:mostly ignorable " + e.getMessage(), e); } } } }
From source file:io.tilt.minka.spectator.NodeCacheable.java
License:Apache License
/** * Create a child Znode (payload) within another parent (queue) Znode *//* w ww. ja v a 2 s .c om*/ private boolean createOrUpdatePath(final String completeName, final String clientName, final Object payload) { final CuratorFramework client = getClient(); if (client == null) { logger.error("{}: ({}) Cannot use Distributed utilities before setting Zookeeper connection", getClass().getSimpleName(), getLogId()); return false; } boolean result = false; try { //String regenPath = null; final byte[] bytes = SerializationUtils.serialize(new MessageMetadata(payload, clientName)); try { acc += bytes.length; if (logger.isDebugEnabled()) { logger.debug("({}) BYTES SENT: {} (total = {})", getLogId(), bytes.length, acc); } final Collection<CuratorTransactionResult> res = createAndSetZNodeEnsuringPath( CreateMode.PERSISTENT, completeName, 0, bytes); return checkTxGeneratedPath(res) != null; } catch (KeeperException e) { logger.error("{}: ({}) Unexpected while posting message: {}", getClass().getSimpleName(), getLogId(), completeName, e); return false; } } catch (Exception e) { if (isStarted() && isConnected()) { logger.error("{}: ({}) Unexpected while posting message: {}", getClass().getSimpleName(), getLogId(), completeName, e); } else { logger.error("{}: ({}) Zookeeper Disconnection: while posting message: {}", getClass().getSimpleName(), getLogId(), completeName, e.getMessage()); } } return result; }
From source file:io.tilt.minka.spectator.NodeCacheable.java
License:Apache License
private Collection<CuratorTransactionResult> createZNode(final CreateMode mode, final String path, final byte[] bytes) throws Exception { try {//from w ww. ja v a 2 s . co m logger.info("{}: ({}) Changing path: {}", getClass().getSimpleName(), getLogId(), path); return getClient().inTransaction().setData().forPath(path, bytes).and().commit(); } catch (KeeperException ke) { if (ke.code() == KeeperException.Code.NONODE) { logger.info("{}: ({}) Creating parent path for first time: {} because: {}", getClass().getSimpleName(), getLogId(), path, ke.getMessage()); return getClient().inTransaction().create().withMode(mode).forPath(path, bytes).and().commit(); } else { logger.error("{}: ({}) Unexpected creating node: {}", getClass().getSimpleName(), getLogId(), path); throw ke; } } }