Examples of org.apache.ambari.server.state.ServiceComponent

org.apache.ambari.server.state.ServiceComponent

      } catch (ServiceNotFoundException e) {
        throw new ParentObjectNotFoundException(
            "Attempted to add a component to a service which doesn't exist:", e);
      }
      try {
        ServiceComponent sc = s.getServiceComponent(request.getComponentName());
        if (sc != null) {
          // throw error later for dup
          duplicates.add("[clusterName=" + request.getClusterName() + ", serviceName=" + request.getServiceName() +
              ", componentName=" + request.getComponentName() + "]");
          continue;
        }
      } catch (AmbariException e) {
        // Expected
      }


      StackId stackId = s.getDesiredStackVersion();
      if (!ambariMetaInfo.isValidServiceComponent(stackId.getStackName(),
          stackId.getStackVersion(), s.getName(), request.getComponentName())) {
        throw new IllegalArgumentException("Unsupported or invalid component"
            + " in stack"
            + ", clusterName=" + request.getClusterName()
            + ", serviceName=" + request.getServiceName()
            + ", componentName=" + request.getComponentName()
            + ", stackInfo=" + stackId.getStackId());
      }
    }


    // ensure only a single cluster update
    if (componentNames.size() != 1) {
      throw new IllegalArgumentException("Invalid arguments, updates allowed"
          + "on only one cluster at a time");
    }


    // Validate dups
    if (!duplicates.isEmpty()) {
      StringBuilder names = new StringBuilder();
      boolean first = true;
      for (String cName : duplicates) {
        if (!first) {
          names.append(",");
        }
        first = false;
        names.append(cName);
      }
      String msg;
      if (duplicates.size() == 1) {
        msg = "Attempted to create a component which already exists: ";
      } else {
        msg = "Attempted to create components which already exist: ";
      }
      throw new DuplicateResourceException(msg + names.toString());
    }




    // now doing actual work
    for (ServiceComponentRequest request : requests) {
      Cluster cluster = clusters.getCluster(request.getClusterName());
      Service s = cluster.getService(request.getServiceName());
      ServiceComponent sc = serviceComponentFactory.createNew(s,
          request.getComponentName());
      sc.setDesiredStackVersion(s.getDesiredStackVersion());


      if (request.getDesiredState() != null
          && !request.getDesiredState().isEmpty()) {
        State state = State.valueOf(request.getDesiredState());
        sc.setDesiredState(state);
      } else {
        sc.setDesiredState(s.getDesiredState());
      }


      // FIXME fix config versions to configs conversion
      Map<String, Config> configs = new HashMap<String, Config>();
      if (request.getConfigVersions() != null) {
      }


      sc.updateDesiredConfigs(configs);
      s.addServiceComponent(sc);
      sc.persist();
    }


  }

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      } catch (ServiceNotFoundException e) {
        throw new IllegalArgumentException(
            "The service[" + request.getServiceName() + "] associated with the component[" +
            request.getComponentName() + "] doesn't exist for the cluster[" + request.getClusterName() + "]");
      }
      ServiceComponent sc = s.getServiceComponent(
          request.getComponentName());


      Host host;
      try {
        host = clusters.getHost(request.getHostname());
      } catch (HostNotFoundException e) {
        throw new ParentObjectNotFoundException(
            "Attempted to add a host_component to a host that doesn't exist: ", e);
      }
      Set<Cluster> mappedClusters =
          clusters.getClustersForHost(request.getHostname());
      boolean validCluster = false;
      if (LOG.isDebugEnabled()) {
        LOG.debug("Looking to match host to cluster"
            + ", hostnameViaReg=" + host.getHostName()
            + ", hostname=" + request.getHostname()
            + ", clusterName=" + request.getClusterName()
            + ", hostClusterMapCount=" + mappedClusters.size());
      }
      for (Cluster mappedCluster : mappedClusters) {
        if (LOG.isDebugEnabled()) {
          LOG.debug("Host belongs to cluster"
              + ", hostname=" + request.getHostname()
              + ", clusterName=" + mappedCluster.getClusterName());
        }
        if (mappedCluster.getClusterName().equals(
            request.getClusterName())) {
          validCluster = true;
          break;
        }
      }
      if (!validCluster) {
        throw new ParentObjectNotFoundException("Attempted to add a host_component to a host that doesn't exist: " +
            "clusterName=" + request.getClusterName() + ", hostName=" + request.getHostname());
      }
      try {
        ServiceComponentHost sch = sc.getServiceComponentHost(
            request.getHostname());
        if (sch != null) {
          duplicates.add("[clusterName=" + request.getClusterName() + ", hostName=" + request.getHostname() +
              ", componentName=" +request.getComponentName() +']');
          continue;
        }
      } catch (AmbariException e) {
        // Expected
      }
    }


    // ensure only a single cluster update
    if (hostComponentNames.size() != 1) {
      throw new IllegalArgumentException("Invalid arguments - updates allowed"
          + " on only one cluster at a time");
    }


    if (!duplicates.isEmpty()) {
      StringBuilder names = new StringBuilder();
      boolean first = true;
      for (String hName : duplicates) {
        if (!first) {
          names.append(",");
        }
        first = false;
        names.append(hName);
      }
      String msg;
      if (duplicates.size() == 1) {
        msg = "Attempted to create a host_component which already exists: ";
      } else {
        msg = "Attempted to create host_component's which already exist: ";
      }
      throw new DuplicateResourceException(msg + names.toString());
    }


    // now doing actual work
    for (ServiceComponentHostRequest request : requests) {
      Cluster cluster = clusters.getCluster(request.getClusterName());
      Service s = cluster.getService(request.getServiceName());
      ServiceComponent sc = s.getServiceComponent(
          request.getComponentName());


      StackId stackId = sc.getDesiredStackVersion();
      ComponentInfo compInfo = ambariMetaInfo.getComponentCategory(
          stackId.getStackName(), stackId.getStackVersion(),
          s.getName(), sc.getName());
      boolean isClient = compInfo.isClient();


      ServiceComponentHost sch =
          serviceComponentHostFactory.createNew(sc, request.getHostname(),
              isClient);


      if (request.getDesiredState() != null
          && !request.getDesiredState().isEmpty()) {
        State state = State.valueOf(request.getDesiredState());
        sch.setDesiredState(state);
      }


      sch.setDesiredStackVersion(sc.getDesiredStackVersion());


      // TODO fix config versions to configs conversion
      Map<String, Config> configs = new HashMap<String, Config>();
      if (request.getConfigVersions() != null) {
      }


      sch.updateDesiredConfigs(configs);
      sc.addServiceComponentHost(sch);
      sch.persist();
    }


  }

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        s = cluster.getService(request.getServiceName());
      } catch (ObjectNotFoundException e) {
        throw new ParentObjectNotFoundException("Parent Service resource doesn't exist", e);
      }


      ServiceComponent sc = s.getServiceComponent(request.getComponentName());
      response.add(sc.convertToResponse());
      return response;
    }


    boolean checkDesiredState = false;
    State desiredStateToCheck = null;
    if (request.getDesiredState() != null
        && !request.getDesiredState().isEmpty()) {
      desiredStateToCheck = State.valueOf(request.getDesiredState());
      if (!desiredStateToCheck.isValidDesiredState()) {
        throw new IllegalArgumentException("Invalid arguments, invalid desired"
            + " state, desiredState=" + desiredStateToCheck);
      }
      checkDesiredState = true;
    }


    Set<Service> services = new HashSet<Service>();
    if (request.getServiceName() != null
        && !request.getServiceName().isEmpty()) {
      services.add(cluster.getService(request.getServiceName()));
    } else {
      services.addAll(cluster.getServices().values());
    }


    for (Service s : services) {
      // filter on request.getDesiredState()
      for (ServiceComponent sc : s.getServiceComponents().values()) {
        if (checkDesiredState
            && (desiredStateToCheck != sc.getDesiredState())) {
          // skip non matching state
          continue;
        }
        response.add(sc.convertToResponse());
      }
    }
    return response;
  }

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  */


  private String getJobTrackerHost(Cluster cluster) {
    try {
      Service svc = cluster.getService("MAPREDUCE");
      ServiceComponent sc = svc.getServiceComponent(Role.JOBTRACKER.toString());
      if (sc.getServiceComponentHosts() != null
          && !sc.getServiceComponentHosts().isEmpty()) {
        return sc.getServiceComponentHosts().keySet().iterator().next();
      }
    } catch (AmbariException ex) {
      return null;
    }
    return null;

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        smokeTestServices.add(serviceName);
        continue;
      }
      for (String componentName :
        changedComponentCount.get(serviceName).keySet()) {
        ServiceComponent sc = cluster.getService(serviceName)
          .getServiceComponent(componentName);
        StackId stackId = sc.getDesiredStackVersion();
        ComponentInfo compInfo = ambariMetaInfo.getComponentCategory(
          stackId.getStackName(), stackId.getStackVersion(), serviceName,
          componentName);
        if (runSmokeTest && compInfo.isMaster()) {
          smokeTestServices.add(serviceName);

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    for (String serviceName : services) {
      Service s = cluster.getService(serviceName);
      for (String component : s.getServiceComponents().keySet()) {
        List<ServiceComponentHost> potentialHosts = new
          ArrayList<ServiceComponentHost>();
        ServiceComponent sc = s.getServiceComponents().get(component);
        if (sc.isClientComponent()) {
          for (ServiceComponentHost potentialSch : sc
            .getServiceComponentHosts().values()) {
            if (!potentialSch.getHostState().equals(HostState
              .HEARTBEAT_LOST)) {
              potentialHosts.add(potentialSch);
            }
          }
        }
        if (potentialHosts != null && !potentialHosts.isEmpty()) {
          clientSchs.put(sc.getName(), potentialHosts);
        }
      }
    }
    LOG.info("Client hosts for reinstall : " + clientSchs.size());

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      }
      componentNames.get(request.getClusterName())
          .get(request.getServiceName()).add(request.getComponentName());


      Service s = cluster.getService(request.getServiceName());
      ServiceComponent sc = s.getServiceComponent(
        request.getComponentName());
      State oldState = sc.getDesiredState();
      State newState = null;
      if (request.getDesiredState() != null) {
        newState = State.valueOf(request.getDesiredState());
        if (!newState.isValidDesiredState()) {
          throw new IllegalArgumentException("Invalid arguments, invalid"
              + " desired state, desiredState=" + newState.toString());
        }
      }


      if (request.getConfigVersions() != null) {
        safeToUpdateConfigsForServiceComponent(sc, oldState, newState);


        for (Entry<String,String> entry :
            request.getConfigVersions().entrySet()) {
          Config config = cluster.getConfig(
              entry.getKey(), entry.getValue());
          if (null == config) {
            // throw error for invalid config
            throw new AmbariException("Trying to update servicecomponent with"
                + " invalid configs"
                + ", clusterName=" + cluster.getClusterName()
                + ", clusterId=" + cluster.getClusterId()
                + ", serviceName=" + s.getName()
                + ", componentName=" + sc.getName()
                + ", invalidConfigType=" + entry.getKey()
                + ", invalidConfigTag=" + entry.getValue());
          }
        }
      }


      if (newState == null) {
        if (LOG.isDebugEnabled()) {
          LOG.debug("Nothing to do for new updateServiceComponent request"
              + ", clusterName=" + request.getClusterName()
              + ", serviceName=" + request.getServiceName()
              + ", componentName=" + request.getComponentName()
              + ", newDesiredState=null");
        }
        continue;
      }


      if (sc.isClientComponent() &&
          !newState.isValidClientComponentState()) {
        throw new AmbariException("Invalid desired state for a client"
            + " component");
      }


      seenNewStates.add(newState);


      State oldScState = sc.getDesiredState();
      if (newState != oldScState) {
        if (!isValidDesiredStateTransition(oldScState, newState)) {
          // FIXME throw correct error
          throw new AmbariException("Invalid transition for"
              + " servicecomponent"
              + ", clusterName=" + cluster.getClusterName()
              + ", clusterId=" + cluster.getClusterId()
              + ", serviceName=" + sc.getServiceName()
              + ", componentName=" + sc.getName()
              + ", currentDesiredState=" + oldScState
              + ", newDesiredState=" + newState);
        }
        if (!changedComps.containsKey(newState)) {
          changedComps.put(newState, new ArrayList<ServiceComponent>());
        }
        if (LOG.isDebugEnabled()) {
          LOG.debug("Handling update to ServiceComponent"
              + ", clusterName=" + request.getClusterName()
              + ", serviceName=" + s.getName()
              + ", componentName=" + sc.getName()
              + ", currentDesiredState=" + oldScState
              + ", newDesiredState=" + newState);
        }
        changedComps.get(newState).add(sc);
      }


      for (ServiceComponentHost sch : sc.getServiceComponentHosts().values()) {
        State oldSchState = sch.getState();
        if (oldSchState == State.MAINTENANCE || oldSchState == State.UNKNOWN) {
          if (LOG.isDebugEnabled()) {
            LOG.debug("Ignoring ServiceComponentHost"
                + ", clusterName=" + request.getClusterName()
                + ", serviceName=" + s.getName()
                + ", componentName=" + sc.getName()
                + ", hostname=" + sch.getHostName()
                + ", currentState=" + oldSchState
                + ", newDesiredState=" + newState);
          }
          continue;
        }
        if (newState == oldSchState) {
          sch.setDesiredState(newState);
          if (LOG.isDebugEnabled()) {
            LOG.debug("Ignoring ServiceComponentHost"
                + ", clusterName=" + request.getClusterName()
                + ", serviceName=" + s.getName()
                + ", componentName=" + sc.getName()
                + ", hostname=" + sch.getHostName()
                + ", currentState=" + oldSchState
                + ", newDesiredState=" + newState);
          }
          continue;
        }
        if (!isValidStateTransition(oldSchState, newState)) {
          // FIXME throw correct error
          throw new AmbariException("Invalid transition for"
              + " servicecomponenthost"
              + ", clusterName=" + cluster.getClusterName()
              + ", clusterId=" + cluster.getClusterId()
              + ", serviceName=" + sch.getServiceName()
              + ", componentName=" + sch.getServiceComponentName()
              + ", hostname=" + sch.getHostName()
              + ", currentState=" + oldSchState
              + ", newDesiredState=" + newState);
        }
        if (!changedScHosts.containsKey(sc.getName())) {
          changedScHosts.put(sc.getName(),
              new HashMap<State, List<ServiceComponentHost>>());
        }
        if (!changedScHosts.get(sc.getName()).containsKey(newState)) {
          changedScHosts.get(sc.getName()).put(newState,
              new ArrayList<ServiceComponentHost>());
        }
        if (LOG.isDebugEnabled()) {
          LOG.debug("Handling update to ServiceComponentHost"
              + ", clusterName=" + request.getClusterName()
              + ", serviceName=" + s.getName()
              + ", componentName=" + sc.getName()
              + ", hostname=" + sch.getHostName()
              + ", currentState=" + oldSchState
              + ", newDesiredState=" + newState);
        }
        changedScHosts.get(sc.getName()).get(newState).add(sch);
      }
    }


    if (seenNewStates.size() > 1) {
      // FIXME should we handle this scenario
      throw new IllegalArgumentException("Cannot handle different desired"
          + " state changes for a set of service components at the same time");
    }


    // TODO additional validation?


    // TODO if all components reach a common state, should service state be
    // modified?


    for (ServiceComponentRequest request : requests) {
      Cluster cluster = clusters.getCluster(request.getClusterName());
      Service s = cluster.getService(request.getServiceName());
      ServiceComponent sc = s.getServiceComponent(
          request.getComponentName());
      if (request.getConfigVersions() != null) {
        Map<String, Config> updated = new HashMap<String, Config>();


        for (Entry<String,String> entry :
          request.getConfigVersions().entrySet()) {
          Config config = cluster.getConfig(
              entry.getKey(), entry.getValue());
          updated.put(config.getType(), config);
        }


        if (!updated.isEmpty()) {
          sc.updateDesiredConfigs(updated);
          for (ServiceComponentHost sch :
              sc.getServiceComponentHosts().values()) {
            sch.deleteDesiredConfigs(updated.keySet());
            sch.persist();
          }
          sc.persist();
        }
      }
    }


    Cluster cluster = clusters.getCluster(clusterNames.iterator().next());

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      hostComponentNames.get(request.getClusterName())
          .get(request.getServiceName()).get(request.getComponentName())
          .add(request.getHostname());


      Service s = cluster.getService(request.getServiceName());
      ServiceComponent sc = s.getServiceComponent(
          request.getComponentName());
      ServiceComponentHost sch = sc.getServiceComponentHost(
          request.getHostname());
      State oldState = sch.getState();
      State newState = null;
      if (request.getDesiredState() != null) {
        newState = State.valueOf(request.getDesiredState());
        if (!newState.isValidDesiredState()) {
          throw new IllegalArgumentException("Invalid arguments, invalid"
              + " desired state, desiredState=" + newState.toString());
        }
      }


      if (request.getConfigVersions() != null) {
        safeToUpdateConfigsForServiceComponentHost(sch, oldState, newState);


        for (Entry<String, String> entry :
            request.getConfigVersions().entrySet()) {
          Config config = cluster.getConfig(
              entry.getKey(), entry.getValue());
          if (null == config) {
            throw new AmbariException("Trying to update servicecomponenthost"
                + " with invalid configs"
                + ", clusterName=" + cluster.getClusterName()
                + ", clusterId=" + cluster.getClusterId()
                + ", serviceName=" + s.getName()
                + ", componentName=" + sc.getName()
                + ", hostname=" + sch.getHostName()
                + ", invalidConfigType=" + entry.getKey()
                + ", invalidConfigTag=" + entry.getValue());
          }
        }
      }


      // If upgrade request comes without state information then its an error
      boolean upgradeRequest = checkIfUpgradeRequestAndValidate(request, cluster, s, sc, sch);


      if (newState == null) {
        if (LOG.isDebugEnabled()) {
          LOG.debug("Nothing to do for new updateServiceComponentHost request"
              + ", clusterName=" + request.getClusterName()
              + ", serviceName=" + request.getServiceName()
              + ", componentName=" + request.getComponentName()
              + ", hostname=" + request.getHostname()
              + ", oldState=" + oldState
              + ", newDesiredState=null");
        }
        continue;
      }


      if (sc.isClientComponent() &&
          !newState.isValidClientComponentState()) {
        throw new IllegalArgumentException("Invalid desired state for a client"
            + " component");
      }


      seenNewStates.add(newState);


      if (!processingUpgradeRequest && upgradeRequest) {
        processingUpgradeRequest = true;
        // this needs to be the first request
        if (numberOfRequestsProcessed > 1) {
          throw new AmbariException("An upgrade request cannot be combined with " +
              "other non-upgrade requests.");
        }
        fromStackVersion = sch.getStackVersion();
      }


      if (processingUpgradeRequest) {
        if (!upgradeRequest) {
          throw new AmbariException("An upgrade request cannot be combined with " +
              "other non-upgrade requests.");
        }
        sch.setState(State.UPGRADING);
        sch.setDesiredStackVersion(cluster.getCurrentStackVersion());
      }


      State oldSchState = sch.getState();
      if (newState == oldSchState) {
        sch.setDesiredState(newState);
        if (LOG.isDebugEnabled()) {
          LOG.debug("Ignoring ServiceComponentHost"
              + ", clusterName=" + request.getClusterName()
              + ", serviceName=" + s.getName()
              + ", componentName=" + sc.getName()
              + ", hostname=" + sch.getHostName()
              + ", currentState=" + oldSchState
              + ", newDesiredState=" + newState);
        }
        continue;
      }


      if (!isValidStateTransition(oldSchState, newState)) {
        throw new AmbariException("Invalid transition for"
            + " servicecomponenthost"
            + ", clusterName=" + cluster.getClusterName()
            + ", clusterId=" + cluster.getClusterId()
            + ", serviceName=" + sch.getServiceName()
            + ", componentName=" + sch.getServiceComponentName()
            + ", hostname=" + sch.getHostName()
            + ", currentState=" + oldSchState
            + ", newDesiredState=" + newState);
      }


      if (isDirectTransition(oldSchState, newState)) {


//        if (newState == State.DELETED) {
//          if (!sch.canBeRemoved()) {
//            throw new AmbariException("Servicecomponenthost cannot be removed"
//                + ", clusterName=" + cluster.getClusterName()
//                + ", clusterId=" + cluster.getClusterId()
//                + ", serviceName=" + sch.getServiceName()
//                + ", componentName=" + sch.getServiceComponentName()
//                + ", hostname=" + sch.getHostName()
//                + ", currentState=" + oldSchState
//                + ", newDesiredState=" + newState);
//          }
//        }


        if (LOG.isDebugEnabled()) {
          LOG.debug("Handling direct transition update to ServiceComponentHost"
              + ", clusterName=" + request.getClusterName()
              + ", serviceName=" + s.getName()
              + ", componentName=" + sc.getName()
              + ", hostname=" + sch.getHostName()
              + ", currentState=" + oldSchState
              + ", newDesiredState=" + newState);
        }
        directTransitionScHosts.put(sch, newState);
      } else {
        if (!changedScHosts.containsKey(sc.getName())) {
          changedScHosts.put(sc.getName(),
              new HashMap<State, List<ServiceComponentHost>>());
        }
        if (!changedScHosts.get(sc.getName()).containsKey(newState)) {
          changedScHosts.get(sc.getName()).put(newState,
              new ArrayList<ServiceComponentHost>());
        }
        if (LOG.isDebugEnabled()) {
          LOG.debug("Handling update to ServiceComponentHost"
              + ", clusterName=" + request.getClusterName()
              + ", serviceName=" + s.getName()
              + ", componentName=" + sc.getName()
              + ", hostname=" + sch.getHostName()
              + ", currentState=" + oldSchState
              + ", newDesiredState=" + newState);
        }
        changedScHosts.get(sc.getName()).get(newState).add(sch);
      }
    }


    if (seenNewStates.size() > 1) {
      // FIXME should we handle this scenario
      throw new IllegalArgumentException("Cannot handle different desired"
          + " state changes for a set of service components at the same time");
    }


    // TODO additional validation?
    for (ServiceComponentHostRequest request : requests) {
      Cluster cluster = clusters.getCluster(request.getClusterName());
      Service s = cluster.getService(request.getServiceName());
      ServiceComponent sc = s.getServiceComponent(
          request.getComponentName());
      ServiceComponentHost sch = sc.getServiceComponentHost(
          request.getHostname());
      if (request.getConfigVersions() != null) {
        Map<String, Config> updated = new HashMap<String, Config>();


        for (Entry<String, String> entry : request.getConfigVersions().entrySet()) {

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            + ", hostname=" + request.getHostname()
            + ", request=" + request);
      }


      Service service = cluster.getService(request.getServiceName());
      ServiceComponent component = service.getServiceComponent(request.getComponentName());
      ServiceComponentHost componentHost = component.getServiceComponentHost(request.getHostname());


      if (!componentHost.canBeRemoved()) {
        throw new AmbariException("Host Component cannot be removed"
            + ", clusterName=" + request.getClusterName()
            + ", serviceName=" + request.getServiceName()
            + ", componentName=" + request.getComponentName()
            + ", hostname=" + request.getHostname()
            + ", request=" + request);
      }


      //Only allow removing master components in MAINTENANCE state without stages generation
      if (component.isClientComponent() ||
          componentHost.getState() != State.MAINTENANCE) {
        throw new AmbariException("Only master or slave component can be removed. They must be in " +
            "MAINTENANCE state in order to be removed.");
      }

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    ComponentInfo compInfo =
        ambariMetaInfo.getServiceInfo(stackId.getStackName(),
            stackId.getStackVersion(), service.getName()).getClientComponent();
    if (compInfo != null) {
      try {
        ServiceComponent serviceComponent =
            service.getServiceComponent(compInfo.getName());
        if (!serviceComponent.getServiceComponentHosts().isEmpty()) {
          return getHealthyHost(serviceComponent.getServiceComponentHosts().keySet());
        }
      } catch (ServiceComponentNotFoundException e) {
        LOG.warn("Could not find required component to run action"
            + ", clusterName=" + cluster.getClusterName()
            + ", serviceName=" + service.getName()
            + ", componentName=" + compInfo.getName());




      }
    }


    // any component will do
    Map<String, ServiceComponent> components = service.getServiceComponents();
    if (components.isEmpty()) {
      return null;
    }


    for (ServiceComponent serviceComponent : components.values()) {
      if (serviceComponent.getServiceComponentHosts().isEmpty()) {
        continue;
      }
      return getHealthyHost(serviceComponent.getServiceComponentHosts().keySet());
    }
    return null;
  }

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