[ 
https://issues.apache.org/jira/browse/STORM-1273?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15131149#comment-15131149
 ] 

ASF GitHub Bot commented on STORM-1273:
---------------------------------------

Github user abhishekagarwal87 commented on a diff in the pull request:

    https://github.com/apache/storm/pull/1071#discussion_r51788562
  
    --- Diff: 
storm-core/src/jvm/org/apache/storm/cluster/StormZkClusterState.java ---
    @@ -0,0 +1,683 @@
    +/**
    + * Licensed to the Apache Software Foundation (ASF) under one
    + * or more contributor license agreements.  See the NOTICE file
    + * distributed with this work for additional information
    + * regarding copyright ownership.  The ASF licenses this file
    + * to you under the Apache License, Version 2.0 (the
    + * "License"); you may not use this file except in compliance
    + * with the License.  You may obtain a copy of the License at
    + *
    + * http://www.apache.org/licenses/LICENSE-2.0
    + *
    + * Unless required by applicable law or agreed to in writing, software
    + * distributed under the License is distributed on an "AS IS" BASIS,
    + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    + * See the License for the specific language governing permissions and
    + * limitations under the License.
    + */
    +package org.apache.storm.cluster;
    +
    +import clojure.lang.APersistentMap;
    +import clojure.lang.IFn;
    +import clojure.lang.PersistentArrayMap;
    +import clojure.lang.RT;
    +import org.apache.commons.lang.StringUtils;
    +import org.apache.curator.framework.CuratorFramework;
    +import org.apache.curator.framework.state.*;
    +import org.apache.curator.framework.state.ConnectionState;
    +import org.apache.storm.callback.Callback;
    +import org.apache.storm.generated.*;
    +import org.apache.storm.nimbus.NimbusInfo;
    +import org.apache.storm.utils.Time;
    +import org.apache.storm.utils.Utils;
    +import org.apache.storm.zookeeper.Zookeeper;
    +import org.apache.zookeeper.KeeperException;
    +import org.apache.zookeeper.data.ACL;
    +import org.slf4j.Logger;
    +import org.slf4j.LoggerFactory;
    +
    +import java.io.UnsupportedEncodingException;
    +import java.security.NoSuchAlgorithmException;
    +import java.util.*;
    +import java.util.concurrent.ConcurrentHashMap;
    +import java.util.concurrent.atomic.AtomicReference;
    +
    +public class StormZkClusterState implements StormClusterState {
    +
    +    private static Logger LOG = 
LoggerFactory.getLogger(StormZkClusterState.class);
    +
    +    private ClusterState clusterState;
    +
    +    private ConcurrentHashMap<String, IFn> assignmentInfoCallback;
    +    private ConcurrentHashMap<String, IFn> 
assignmentInfoWithVersionCallback;
    +    private ConcurrentHashMap<String, IFn> assignmentVersionCallback;
    +    private AtomicReference<IFn> supervisorsCallback;
    +    // we want to reigister a topo directory getChildren callback for all 
workers of this dir
    +    private ConcurrentHashMap<String, IFn> backPressureCallback;
    +    private AtomicReference<IFn> assignmentsCallback;
    +    private ConcurrentHashMap<String, IFn> stormBaseCallback;
    +    private AtomicReference<IFn> blobstoreCallback;
    +    private ConcurrentHashMap<String, IFn> credentialsCallback;
    +    private ConcurrentHashMap<String, IFn> logConfigCallback;
    +
    +    private List<ACL> acls;
    +    private String stateId;
    +    private boolean solo;
    +
    +    public StormZkClusterState(Object clusterState, List<ACL> acls, 
ClusterStateContext context) throws Exception {
    +
    +        if (clusterState instanceof ClusterState) {
    +            solo = false;
    +            this.clusterState = (ClusterState) clusterState;
    +        } else {
    +
    +            solo = true;
    +            this.clusterState = new DistributedClusterState((Map) 
clusterState, (Map) clusterState, acls, context);
    +        }
    +
    +        assignmentInfoCallback = new ConcurrentHashMap<>();
    +        assignmentInfoWithVersionCallback = new ConcurrentHashMap<>();
    +        assignmentVersionCallback = new ConcurrentHashMap<>();
    +        supervisorsCallback = new AtomicReference<>();
    +        backPressureCallback = new ConcurrentHashMap<>();
    +        assignmentsCallback = new AtomicReference<>();
    +        stormBaseCallback = new ConcurrentHashMap<>();
    +        credentialsCallback = new ConcurrentHashMap<>();
    +        logConfigCallback = new ConcurrentHashMap<>();
    +        blobstoreCallback = new AtomicReference<>();
    +
    +        stateId = this.clusterState.register(new Callback() {
    +
    +            public <T> Object execute(T... args) {
    +                if (args == null) {
    +                    LOG.warn("Input args is null");
    +                    return null;
    +                } else if (args.length < 2) {
    +                    LOG.warn("Input args is invalid, args length:" + 
args.length);
    +                    return null;
    +                }
    +                String path = (String) args[1];
    +
    +                List<String> toks = Zookeeper.tokenizePath(path);
    +                int size = toks.size();
    +                if (size >= 1) {
    +                    String params = null;
    +                    String root = toks.get(0);
    +                    IFn fn = null;
    +                    if (root.equals(Cluster.ASSIGNMENTS_ROOT)) {
    +                        if (size == 1) {
    +                            // set null and get the old value
    +                            issueCallback(assignmentsCallback);
    +                        } else {
    +                            issueMapCallback(assignmentInfoCallback, 
toks.get(1));
    +                            issueMapCallback(assignmentVersionCallback, 
toks.get(1));
    +                            
issueMapCallback(assignmentInfoWithVersionCallback, toks.get(1));
    +                        }
    +
    +                    } else if (root.equals(Cluster.SUPERVISORS_ROOT)) {
    +                        issueCallback(supervisorsCallback);
    +                    } else if (root.equals(Cluster.BLOBSTORE_ROOT)) {
    +                        issueCallback(blobstoreCallback);
    +                    } else if (root.equals(Cluster.STORMS_ROOT) && size > 
1) {
    +                        issueMapCallback(stormBaseCallback, toks.get(1));
    +                    } else if (root.equals(Cluster.CREDENTIALS_ROOT) && 
size > 1) {
    +                        issueMapCallback(credentialsCallback, toks.get(1));
    +                    } else if (root.equals(Cluster.LOGCONFIG_ROOT) && size 
> 1) {
    +                        issueMapCallback(logConfigCallback, toks.get(1));
    +                    } else if (root.equals(Cluster.BACKPRESSURE_ROOT) && 
size > 1) {
    +                        issueMapCallback(logConfigCallback, toks.get(1));
    +                    } else {
    +                        LOG.error("{} Unknown callback for subtree {}", 
new RuntimeException("Unknown callback for this path"), path);
    +                        Runtime.getRuntime().exit(30);
    +                    }
    +
    +                }
    +
    +                return null;
    +            }
    +
    +        });
    +
    +        String[] pathlist = { Cluster.ASSIGNMENTS_SUBTREE, 
Cluster.STORMS_SUBTREE, Cluster.SUPERVISORS_SUBTREE, 
Cluster.WORKERBEATS_SUBTREE,
    +                Cluster.ERRORS_SUBTREE, Cluster.BLOBSTORE_SUBTREE, 
Cluster.NIMBUSES_SUBTREE, Cluster.LOGCONFIG_SUBTREE };
    +        for (String path : pathlist) {
    +            this.clusterState.mkdirs(path, acls);
    +        }
    +
    +    }
    +
    +    protected void issueCallback(AtomicReference<IFn> cb) {
    +        IFn callback = cb.getAndSet(null);
    +        if (callback != null)
    +            callback.invoke();
    +    }
    +
    +    protected void issueMapCallback(ConcurrentHashMap<String, IFn> 
callbackConcurrentHashMap, String key) {
    +        IFn callback = callbackConcurrentHashMap.remove(key);
    +        if (callback != null)
    +            callback.invoke();
    +    }
    +
    +    @Override
    +    public List<String> assignments(IFn callback) {
    +        if (callback != null) {
    +            assignmentsCallback.set(callback);
    +        }
    +        return clusterState.get_children(Cluster.ASSIGNMENTS_SUBTREE, 
callback != null);
    +    }
    +
    +    @Override
    +    public Assignment assignmentInfo(String stormId, IFn callback) {
    +        if (callback != null) {
    +            assignmentInfoCallback.put(stormId, callback);
    +        }
    +        byte[] serialized = 
clusterState.get_data(Cluster.assignmentPath(stormId), callback != null);
    +        return Cluster.maybeDeserialize(serialized, Assignment.class);
    +    }
    +
    +    @Override
    +    public APersistentMap assignmentInfoWithVersion(String stormId, IFn 
callback) {
    +        if (callback != null) {
    +            assignmentInfoWithVersionCallback.put(stormId, callback);
    +        }
    +        APersistentMap aPersistentMap = 
clusterState.get_data_with_version(Cluster.assignmentPath(stormId), callback != 
null);
    +        Assignment assignment = Cluster.maybeDeserialize((byte[]) 
aPersistentMap.get("data"), Assignment.class);
    +        Integer version = (Integer) aPersistentMap.get("version");
    +        APersistentMap map = new PersistentArrayMap(new Object[] { 
RT.keyword(null, "data"), assignment, RT.keyword(null, "version"), version });
    +        return map;
    +    }
    +
    +    @Override
    +    public Integer assignmentVersion(String stormId, IFn callback) throws 
Exception {
    +        if (callback != null) {
    +            assignmentVersionCallback.put(stormId, callback);
    +        }
    +        return clusterState.get_version(Cluster.assignmentPath(stormId), 
callback != null);
    +    }
    +
    +    // blobstore state
    +    @Override
    +    public List<String> blobstoreInfo(String blobKey) {
    +        String path = Cluster.blobstorePath(blobKey);
    +        clusterState.sync_path(path);
    +        return clusterState.get_children(path, false);
    +    }
    +
    +    @Override
    +    public List nimbuses() {
    +        List<NimbusSummary> nimbusSummaries = new ArrayList<>();
    +        List<String> nimbusIds = 
clusterState.get_children(Cluster.NIMBUSES_SUBTREE, false);
    +        for (String nimbusId : nimbusIds) {
    +            byte[] serialized = 
clusterState.get_data(Cluster.nimbusPath(nimbusId), false);
    +            NimbusSummary nimbusSummary = 
Cluster.maybeDeserialize(serialized, NimbusSummary.class);
    +            nimbusSummaries.add(nimbusSummary);
    +        }
    +        return nimbusSummaries;
    +    }
    +
    +    @Override
    +    public void addNimbusHost(final String nimbusId, final NimbusSummary 
nimbusSummary) {
    +        // explicit delete for ephmeral node to ensure this session 
creates the entry.
    +        clusterState.delete_node(Cluster.nimbusPath(nimbusId));
    +        clusterState.add_listener(new ConnectionStateListener() {
    +            @Override
    +            public void stateChanged(CuratorFramework curatorFramework, 
ConnectionState connectionState) {
    +                LOG.info("Connection state listener invoked, zookeeper 
connection state has changed to {}", connectionState);
    +                if (connectionState.equals(ConnectionState.RECONNECTED)) {
    +                    LOG.info("Connection state has changed to reconnected 
so setting nimbuses entry one more time");
    +                    
clusterState.set_ephemeral_node(Cluster.nimbusPath(nimbusId), 
Utils.serialize(nimbusSummary), acls);
    +                }
    +
    +            }
    +        });
    +
    +        clusterState.set_ephemeral_node(Cluster.nimbusPath(nimbusId), 
Utils.serialize(nimbusSummary), acls);
    +    }
    +
    +    @Override
    +    public List<String> activeStorms() {
    +        return clusterState.get_children(Cluster.STORMS_SUBTREE, false);
    +    }
    +
    +    @Override
    +    public StormBase stormBase(String stormId, IFn callback) {
    +        if (callback != null) {
    +            stormBaseCallback.put(stormId, callback);
    +        }
    +        return 
Cluster.maybeDeserialize(clusterState.get_data(Cluster.stormPath(stormId), 
callback != null), StormBase.class);
    +    }
    +
    +    @Override
    +    public ClusterWorkerHeartbeat getWorkerHeartbeat(String stormId, 
String node, Long port) {
    +        byte[] bytes = 
clusterState.get_worker_hb(Cluster.workerbeatPath(stormId, node, port), false);
    +        if (bytes != null) {
    +            return Cluster.maybeDeserialize(bytes, 
ClusterWorkerHeartbeat.class);
    +        }
    +        return null;
    +    }
    +
    +    @Override
    +    public List<ProfileRequest> getWorkerProfileRequests(String stormId, 
NodeInfo nodeInfo, boolean isThrift) {
    +        List<ProfileRequest> requests = new ArrayList<>();
    +        List<ProfileRequest> profileRequests = 
getTopologyProfileRequests(stormId, isThrift);
    +        for (ProfileRequest profileRequest : profileRequests) {
    +            NodeInfo nodeInfo1 = profileRequest.get_nodeInfo();
    +            if (nodeInfo1.equals(nodeInfo))
    +                requests.add(profileRequest);
    +        }
    +        return requests;
    +    }
    +
    +    @Override
    +    public List<ProfileRequest> getTopologyProfileRequests(String stormId, 
boolean isThrift) {
    +        List<ProfileRequest> profileRequests = new ArrayList<>();
    +        String path = Cluster.profilerConfigPath(stormId);
    +        if (clusterState.node_exists(path, false)) {
    +            List<String> strs = clusterState.get_children(path, false);
    +            for (String str : strs) {
    +                String childPath = path + Cluster.ZK_SEPERATOR + str;
    +                byte[] raw = clusterState.get_data(childPath, false);
    +                ProfileRequest request = Cluster.maybeDeserialize(raw, 
ProfileRequest.class);
    +                if (request != null)
    +                    profileRequests.add(request);
    +            }
    +        }
    +        return profileRequests;
    +    }
    +
    +    @Override
    +    public void setWorkerProfileRequest(String stormId, ProfileRequest 
profileRequest) {
    +        ProfileAction profileAction = profileRequest.get_action();
    +        String host = profileRequest.get_nodeInfo().get_node();
    +        Long port = 
profileRequest.get_nodeInfo().get_port_iterator().next();
    +        String path = Cluster.profilerConfigPath(stormId, host, port, 
profileAction);
    +        clusterState.set_data(path, Utils.serialize(profileRequest), acls);
    +    }
    +
    +    @Override
    +    public void deleteTopologyProfileRequests(String stormId, 
ProfileRequest profileRequest) {
    +        ProfileAction profileAction = profileRequest.get_action();
    +        String host = profileRequest.get_nodeInfo().get_node();
    +        Long port = 
profileRequest.get_nodeInfo().get_port_iterator().next();
    +        String path = Cluster.profilerConfigPath(stormId, host, port, 
profileAction);
    +        clusterState.delete_node(path);
    +    }
    +
    +    // need to take executor->node+port in explicitly so that we don't run 
into a situation where a
    +    // long dead worker with a skewed clock overrides all the timestamps. 
By only checking heartbeats
    +    // with an assigned node+port, and only reading executors from that 
heartbeat that are actually assigned,
    +    // we avoid situations like that
    +    @Override
    +    public Map<ExecutorInfo, ClusterWorkerHeartbeat> executorBeats(String 
stormId, Map<List<Long>, NodeInfo> executorNodePort) {
    +        Map<ExecutorInfo, ClusterWorkerHeartbeat> executorWhbs = new 
HashMap<>();
    +
    +        LOG.info(executorNodePort.toString());
    +        Map<NodeInfo, List<List<Long>>> nodePortExecutors = 
Cluster.reverseMap(executorNodePort);
    +        LOG.info(nodePortExecutors.toString());
    +
    +        for (Map.Entry<NodeInfo, List<List<Long>>> entry : 
nodePortExecutors.entrySet()) {
    +
    +            String node = entry.getKey().get_node();
    +            Long port = entry.getKey().get_port_iterator().next();
    +            ClusterWorkerHeartbeat whb = getWorkerHeartbeat(stormId, node, 
port);
    +            List<ExecutorInfo> executorInfoList = new ArrayList<>();
    +            for (List<Long> list : entry.getValue()) {
    +                executorInfoList.add(new 
ExecutorInfo(list.get(0).intValue(), list.get(list.size() - 1).intValue()));
    +            }
    +            
executorWhbs.putAll(Cluster.convertExecutorBeats(executorInfoList, whb));
    +        }
    +        return executorWhbs;
    +    }
    +
    +    @Override
    +    public List<String> supervisors(IFn callback) {
    +        if (callback != null) {
    +            supervisorsCallback.set(callback);
    +        }
    +        return clusterState.get_children(Cluster.SUPERVISORS_SUBTREE, 
callback != null);
    +    }
    +
    +    @Override
    +    public SupervisorInfo supervisorInfo(String supervisorId) {
    +        String path = Cluster.supervisorPath(supervisorId);
    +        return Cluster.maybeDeserialize(clusterState.get_data(path, 
false), SupervisorInfo.class);
    +    }
    +
    +    @Override
    +    public void setupHeatbeats(String stormId) {
    +        clusterState.mkdirs(Cluster.workerbeatStormRoot(stormId), acls);
    +    }
    +
    +    @Override
    +    public void teardownHeartbeats(String stormId) {
    +        try {
    +            
clusterState.delete_worker_hb(Cluster.workerbeatStormRoot(stormId));
    +        } catch (Exception e) {
    +            if (Zookeeper.exceptionCause(KeeperException.class, e)) {
    +                // do nothing
    +                LOG.warn("Could not teardown heartbeats for {}.", stormId);
    +            } else {
    +                throw e;
    +            }
    +        }
    +    }
    +
    +    @Override
    +    public void teardownTopologyErrors(String stormId) {
    +        try {
    +            clusterState.delete_node(Cluster.errorStormRoot(stormId));
    +        } catch (Exception e) {
    +            if (Zookeeper.exceptionCause(KeeperException.class, e)) {
    +                // do nothing
    +                LOG.warn("Could not teardown errors for {}.", stormId);
    +            } else {
    +                throw e;
    +            }
    +        }
    +    }
    +
    +    @Override
    +    public List<String> heartbeatStorms() {
    +        return 
clusterState.get_worker_hb_children(Cluster.WORKERBEATS_SUBTREE, false);
    +    }
    +
    +    @Override
    +    public List<String> errorTopologies() {
    +        return clusterState.get_children(Cluster.ERRORS_SUBTREE, false);
    +    }
    +
    +    @Override
    +    public void setTopologyLogConfig(String stormId, LogConfig logConfig) {
    +        clusterState.set_data(Cluster.logConfigPath(stormId), 
Utils.serialize(logConfig), acls);
    +    }
    +
    +    @Override
    +    public LogConfig topologyLogConfig(String stormId, IFn cb) {
    +        String path = Cluster.logConfigPath(stormId);
    +        return Cluster.maybeDeserialize(clusterState.get_data(path, cb != 
null), LogConfig.class);
    +    }
    +
    +    @Override
    +    public void workerHeartbeat(String stormId, String node, Long port, 
ClusterWorkerHeartbeat info) {
    +        if (info != null) {
    +            String path = Cluster.workerbeatPath(stormId, node, port);
    +            clusterState.set_worker_hb(path, Utils.serialize(info), acls);
    +        }
    +    }
    +
    +    @Override
    +    public void removeWorkerHeartbeat(String stormId, String node, Long 
port) {
    +        String path = Cluster.workerbeatPath(stormId, node, port);
    +        clusterState.delete_worker_hb(path);
    +    }
    +
    +    @Override
    +    public void supervisorHeartbeat(String supervisorId, SupervisorInfo 
info) {
    +        String path = Cluster.supervisorPath(supervisorId);
    +        clusterState.set_ephemeral_node(path, Utils.serialize(info), acls);
    +    }
    +
    +    // if znode exists and to be not on?, delete; if exists and on?, do 
nothing;
    +    // if not exists and to be on?, create; if not exists and not on?, do 
nothing;
    +    @Override
    +    public void workerBackpressure(String stormId, String node, Long port, 
boolean on) {
    +        String path = Cluster.backpressurePath(stormId, node, port);
    +        boolean existed = clusterState.node_exists(path, false);
    +        if (existed) {
    +            if (on == false)
    +                clusterState.delete_node(path);
    +
    +        } else {
    +            if (on == true) {
    +                clusterState.set_ephemeral_node(path, null, acls);
    +            }
    +        }
    +    }
    +
    +    // if the backpresure/storm-id dir is empty, this topology has 
throttle-on, otherwise not.
    +    @Override
    +    public boolean topologyBackpressure(String stormId, IFn callback) {
    +        if (callback != null) {
    +            backPressureCallback.put(stormId, callback);
    +        }
    +        String path = Cluster.backpressureStormRoot(stormId);
    +        List<String> childrens = clusterState.get_children(path, callback 
!= null);
    +        return childrens.size() > 0;
    +
    +    }
    +
    +    @Override
    +    public void setupBackpressure(String stormId) {
    +        clusterState.mkdirs(Cluster.backpressureStormRoot(stormId), acls);
    +    }
    +
    +    @Override
    +    public void removeWorkerBackpressure(String stormId, String node, Long 
port) {
    +        clusterState.delete_node(Cluster.backpressurePath(stormId, node, 
port));
    +    }
    +
    +    @Override
    +    public void activateStorm(String stormId, StormBase stormBase) {
    +        String path = Cluster.stormPath(stormId);
    +        clusterState.set_data(path, Utils.serialize(stormBase), acls);
    +    }
    +
    +    // maybe exit some questions for updateStorm
    +    @Override
    +    public void updateStorm(String stormId, StormBase newElems) {
    +
    +        StormBase stormBase = stormBase(stormId, null);
    +        if (stormBase.get_component_executors() != null) {
    +
    +            Map<String, Integer> newComponentExecutors = new HashMap<>();
    +            Map<String, Integer> componentExecutors = 
newElems.get_component_executors();
    +            //componentExecutors maybe be APersistentMap, which don't 
support put
    +            for (Map.Entry<String, Integer> entry : 
componentExecutors.entrySet()) {
    +                    newComponentExecutors.put(entry.getKey(), 
entry.getValue());
    +            }
    +            for (Map.Entry<String, Integer> entry : 
stormBase.get_component_executors().entrySet()) {
    +                if (!componentExecutors.containsKey(entry.getKey())) {
    +                    newComponentExecutors.put(entry.getKey(), 
entry.getValue());
    +                }
    +            }
    +            if (newComponentExecutors.size() > 0)
    +                newElems.set_component_executors(newComponentExecutors);
    +        }
    +
    +        Map<String, DebugOptions> ComponentDebug = new HashMap<>();
    +        Map<String, DebugOptions> oldComponentDebug = 
stormBase.get_component_debug();
    +
    +        Map<String, DebugOptions> newComponentDebug = 
newElems.get_component_debug();
    +
    +        Set<String> debugOptionsKeys = oldComponentDebug.keySet();
    +        debugOptionsKeys.addAll(newComponentDebug.keySet());
    +        for (String key : debugOptionsKeys) {
    +            boolean enable = false;
    +            double samplingpct = 0;
    +            if (oldComponentDebug.containsKey(key)) {
    +                enable = oldComponentDebug.get(key).is_enable();
    +                samplingpct = oldComponentDebug.get(key).get_samplingpct();
    +            }
    +            if (newComponentDebug.containsKey(key)) {
    +                enable = newComponentDebug.get(key).is_enable();
    +                samplingpct += 
newComponentDebug.get(key).get_samplingpct();
    +            }
    +            DebugOptions debugOptions = new DebugOptions();
    +            debugOptions.set_enable(enable);
    +            debugOptions.set_samplingpct(samplingpct);
    +            ComponentDebug.put(key, debugOptions);
    +        }
    +        if (ComponentDebug.size() > 0) {
    +            newElems.set_component_debug(ComponentDebug);
    +        }
    +
    +
    +        if (StringUtils.isBlank(newElems.get_name())) {
    +            newElems.set_name(stormBase.get_name());
    +        }
    +        if (newElems.get_status() == null){
    +            newElems.set_status(stormBase.get_status());
    +        }
    +        if (newElems.get_num_workers() == 0){
    +            newElems.set_num_workers(stormBase.get_num_workers());
    +        }
    +        if (newElems.get_launch_time_secs() == 0) {
    +            
newElems.set_launch_time_secs(stormBase.get_launch_time_secs());
    +        }
    +        if (StringUtils.isBlank(newElems.get_owner())) {
    +            newElems.set_owner(stormBase.get_owner());
    +        }
    +        if (newElems.get_topology_action_options() == null) {
    +            
newElems.set_topology_action_options(stormBase.get_topology_action_options());
    +        }
    +        if (newElems.get_status() == null) {
    +            newElems.set_status(stormBase.get_status());
    +        }
    +        clusterState.set_data(Cluster.stormPath(stormId), 
Utils.serialize(newElems), acls);
    +    }
    +
    +    @Override
    +    public void removeStormBase(String stormId) {
    +        clusterState.delete_node(Cluster.stormPath(stormId));
    +    }
    +
    +    @Override
    +    public void setAssignment(String stormId, Assignment info) {
    +        clusterState.set_data(Cluster.assignmentPath(stormId), 
Utils.serialize(info), acls);
    +    }
    +
    +    @Override
    +    public void setupBlobstore(String key, NimbusInfo nimbusInfo, Integer 
versionInfo) {
    +        String path = Cluster.blobstorePath(key) + Cluster.ZK_SEPERATOR + 
nimbusInfo.toHostPortString() + "-" + versionInfo;
    +        LOG.info("set-path: {}", path);
    +        clusterState.mkdirs(Cluster.blobstorePath(key), acls);
    +        clusterState.delete_node_blobstore(Cluster.blobstorePath(key), 
nimbusInfo.toHostPortString());
    +        clusterState.set_ephemeral_node(path, null, acls);
    +    }
    +
    +    @Override
    +    public List<String> activeKeys() {
    +        return clusterState.get_children(Cluster.BLOBSTORE_SUBTREE, false);
    +    }
    +
    +    // blobstore state
    +    @Override
    +    public List<String> blobstore(IFn callback) {
    +        if (callback != null) {
    +            blobstoreCallback.set(callback);
    +        }
    +        clusterState.sync_path(Cluster.BLOBSTORE_SUBTREE);
    +        return clusterState.get_children(Cluster.BLOBSTORE_SUBTREE, 
callback != null);
    +
    +    }
    +
    +    @Override
    +    public void removeStorm(String stormId) {
    +        clusterState.delete_node(Cluster.assignmentPath(stormId));
    +        clusterState.delete_node(Cluster.credentialsPath(stormId));
    +        clusterState.delete_node(Cluster.logConfigPath(stormId));
    +        clusterState.delete_node(Cluster.profilerConfigPath(stormId));
    +        removeStormBase(stormId);
    +    }
    +
    +    @Override
    +    public void removeBlobstoreKey(String blobKey) {
    +        LOG.debug("remove key {}", blobKey);
    +        clusterState.delete_node(Cluster.blobstorePath(blobKey));
    +    }
    +
    +    @Override
    +    public void removeKeyVersion(String blobKey) {
    +        
clusterState.delete_node(Cluster.blobstoreMaxKeySequenceNumberPath(blobKey));
    +    }
    +
    +    @Override
    +    public void reportError(String stormId, String componentId, String 
node, Integer port, String error) {
    +
    +        try {
    +            String path = Cluster.errorPath(stormId, componentId);
    +            String lastErrorPath = Cluster.lastErrorPath(stormId, 
componentId);
    +            ErrorInfo errorInfo = new ErrorInfo(error, 
Time.currentTimeSecs());
    +            errorInfo.set_host(node);
    +            errorInfo.set_port(port.intValue());
    +            byte[] serData = Utils.serialize(errorInfo);
    +            clusterState.mkdirs(path, acls);
    +            clusterState.create_sequential(path + Cluster.ZK_SEPERATOR + 
"e", serData, acls);
    +            clusterState.set_data(lastErrorPath, serData, acls);
    +            List<String> childrens = clusterState.get_children(path, 
false);
    +
    +            Collections.sort(childrens);
    --- End diff --
    
    this will sort e1, e2, e12 to e1, e12, e2 while you want it to be e1, e2, 
e12. 


> port backtype.storm.cluster to java
> -----------------------------------
>
>                 Key: STORM-1273
>                 URL: https://issues.apache.org/jira/browse/STORM-1273
>             Project: Apache Storm
>          Issue Type: New Feature
>          Components: storm-core
>            Reporter: Robert Joseph Evans
>            Assignee: Basti Liu
>              Labels: java-migration, jstorm-merger
>
> current state of the cluster (Some of this moves to java as a part of 
> heartbeat server)
> https://github.com/apache/storm/tree/jstorm-import/jstorm-core/src/main/java/com/alibaba/jstorm/cluster
>  as an example



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