Examples of org.apache.helix.HelixDataAccessor.removeProperty()

Class org.apache.helix.HelixDataAccessor

Examples of org.apache.helix.HelixDataAccessor.removeProperty()

org.apache.helix.HelixDataAccessor.removeProperty()
Removes the property @param key @return true if removal was successful or node does not exist. false if thenode existed and failed to remove it

    // create a cluster with the same id
    boolean created2 = createCluster(clusterId, accessor, MODIFIER, 2);
    Assert.assertFalse(created2); // should fail since cluster exists


    // remove a required property
    helixAccessor.removeProperty(helixAccessor.keyBuilder().liveInstances());


    // try again, should work this time
    created2 = createCluster(clusterId, accessor, MODIFIER, 2);
    Assert.assertTrue(created2);

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    // create a participant with the same id
    boolean created2 = createParticipant(participantId, accessor, MODIFIER, 2);
    Assert.assertFalse(created2); // should fail since participant exists


    // remove a required property
    helixAccessor.removeProperty(helixAccessor.keyBuilder().messages(participantId.stringify()));


    // try again, should work this time
    created2 = createParticipant(participantId, accessor, MODIFIER, 2);
    Assert.assertTrue(created2);

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    }


    // remove dead external-views
    for (String resourceName : curExtViews.keySet()) {
      if (!resourceMap.containsKey(ResourceId.from(resourceName))) {
        dataAccessor.removeProperty(keyBuilder.externalView(resourceName));
      }
    }


    long endTime = System.currentTimeMillis();
    LOG.info("END ExternalViewComputeStage.process(). took: " + (endTime - startTime) + " ms");

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         * note that session expiry may happen during checking leader and remove leader
         * in this race condition, we may remove a leader node created by another controller
         * this is fine since it will just invoke another round of leader-election
         */
        if (_controller.isLeader()) {
          accessor.removeProperty(keyBuilder.controllerLeader());
        }
      }


    } catch (Exception e) {
      LOG.error("Exception when trying to become leader", e);

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    LiveInstance leader = accessor.getProperty(keyBuilder.controllerLeader());
    Assert.assertNotNull(leader);
    Assert.assertEquals(leader.getInstanceName(), controllerId.stringify());


    // remove leader znode externally
    accessor.removeProperty(keyBuilder.controllerLeader());


    // verify leader is re-elected
    boolean result = TestHelper.verify(new TestHelper.Verifier() {


      @Override

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    HelixDataAccessor accessor =
        new ZKHelixDataAccessor(clusterName, new ZkBaseDataAccessor<ZNRecord>(_zkClient));
    Builder keyBuilder = accessor.keyBuilder();


    if (enabled) {
      accessor.removeProperty(keyBuilder.pause());
    } else {
      accessor.createProperty(keyBuilder.pause(), new PauseSignal("pause"));
    }
  }

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    // Remove all ideal states and resource configs to trigger a drop event
    HelixDataAccessor accessor = _manager.getHelixDataAccessor();
    PropertyKey.Builder keyBuilder = accessor.keyBuilder();
    final Set<String> toRemove = Sets.newHashSet(config.getJobDag().getAllNodes());
    for (String resourceName : toRemove) {
      accessor.removeProperty(keyBuilder.idealStates(resourceName));
      accessor.removeProperty(keyBuilder.resourceConfig(resourceName));
      // Delete context
      String contextKey = Joiner.on("/").join(TaskConstants.REBALANCER_CONTEXT_ROOT, resourceName);
      _manager.getHelixPropertyStore().remove(contextKey, AccessOption.PERSISTENT);
    }

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    HelixDataAccessor accessor = _manager.getHelixDataAccessor();
    PropertyKey.Builder keyBuilder = accessor.keyBuilder();
    final Set<String> toRemove = Sets.newHashSet(config.getJobDag().getAllNodes());
    for (String resourceName : toRemove) {
      accessor.removeProperty(keyBuilder.idealStates(resourceName));
      accessor.removeProperty(keyBuilder.resourceConfig(resourceName));
      // Delete context
      String contextKey = Joiner.on("/").join(TaskConstants.REBALANCER_CONTEXT_ROOT, resourceName);
      _manager.getHelixPropertyStore().remove(contextKey, AccessOption.PERSISTENT);
    }

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        Assert.assertTrue(callback.isFinalizeTypeInvoked());
      }
    }


    // Remove fake instance
    accessor.removeProperty(keyBuilder.liveInstance("fakeInstance"));


    // Re-enable custom-code runner
    admin.enableResource(clusterName, customCodeRunnerResource, true);
    result =
        ClusterStateVerifier

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    accessor.getBaseDataAccessor().update(workflowKey.getPath(), dagRemover,
        AccessOption.PERSISTENT);


    // Delete resource configs.
    PropertyKey cfgKey = getConfigPropertyKey(accessor, resourceName);
    if (!accessor.removeProperty(cfgKey)) {
      throw new RuntimeException(
          String
              .format(
                  "Error occurred while trying to clean up job %s. Failed to remove node %s from Helix. Aborting further clean up steps.",
                  resourceName, cfgKey));

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