ControllerInstanceToggleTest.java example

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/**
 * Copyright (C) 2014-2016 LinkedIn Corp. (pinot-core@linkedin.com)
 *
 * Licensed 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 com.linkedin.pinot.controller.helix;

import java.util.Set;

import org.apache.helix.manager.zk.ZkClient;
import org.apache.helix.model.ExternalView;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.testng.Assert;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;

import com.linkedin.pinot.common.segment.SegmentMetadata;
import com.linkedin.pinot.common.utils.CommonConstants;
import com.linkedin.pinot.common.utils.ZkStarter;
import com.linkedin.pinot.common.utils.helix.HelixHelper;
import com.linkedin.pinot.controller.helix.core.PinotHelixResourceManager;
import com.linkedin.pinot.core.query.utils.SimpleSegmentMetadata;


public class ControllerInstanceToggleTest extends ControllerTest {

  private static final Logger LOGGER = LoggerFactory.getLogger(ControllerInstanceToggleTest.class);
  private static final String HELIX_CLUSTER_NAME = "ControllerInstanceToggleTest";
  static ZkClient _zkClient = null;

  private PinotHelixResourceManager _pinotResourceManager;

  @BeforeClass
  public void setup() throws Exception {
    startZk();
    _zkClient = new ZkClient(ZkStarter.DEFAULT_ZK_STR);
    startController();
    _pinotResourceManager = _controllerStarter.getHelixResourceManager();
    ControllerRequestBuilderUtil.addFakeBrokerInstancesToAutoJoinHelixCluster(HELIX_CLUSTER_NAME,
        ZkStarter.DEFAULT_ZK_STR, 20, true);
    ControllerRequestBuilderUtil.addFakeDataInstancesToAutoJoinHelixCluster(HELIX_CLUSTER_NAME,
        ZkStarter.DEFAULT_ZK_STR, 20, true);
  }

  @AfterClass
  public void tearDown() {
    stopController();
    try {
      if (_zkClient.exists("/" + HELIX_CLUSTER_NAME)) {
        _zkClient.deleteRecursive("/" + HELIX_CLUSTER_NAME);
      }
    } catch (Exception e) {
    }
    _zkClient.close();
    stopZk();
  }

  @Test
  public void testInstanceToggle() throws Exception {

    // Create offline table creation request
    String tableName = "testTable";
    JSONObject payload = ControllerRequestBuilderUtil.buildCreateOfflineTableJSON(tableName, null, null, 20);
    sendPostRequest(ControllerRequestURLBuilder.baseUrl(CONTROLLER_BASE_API_URL).forTableCreate(), payload.toString());
    Assert.assertEquals(
        _helixAdmin.getResourceIdealState(HELIX_CLUSTER_NAME, CommonConstants.Helix.BROKER_RESOURCE_INSTANCE)
            .getPartitionSet().size(), 1);
    Assert.assertEquals(
        _helixAdmin.getResourceIdealState(HELIX_CLUSTER_NAME, CommonConstants.Helix.BROKER_RESOURCE_INSTANCE)
            .getInstanceSet(tableName + "_OFFLINE").size(), 20);

    // Adding segments
    for (int i = 0; i < 10; ++i) {
      Assert.assertEquals(_helixAdmin.getResourceIdealState(HELIX_CLUSTER_NAME, tableName + "_OFFLINE")
          .getNumPartitions(), i);
      addOneOfflineSegment(tableName);
      Thread.sleep(2000);
      Assert.assertEquals(_helixAdmin.getResourceIdealState(HELIX_CLUSTER_NAME, tableName + "_OFFLINE")
          .getNumPartitions(), i + 1);
    }

    Thread.sleep(2000);
    // Disable Instance
    int i = 20;
    for (String instanceName : _helixAdmin.getInstancesInClusterWithTag(HELIX_CLUSTER_NAME, "DefaultTenant_OFFLINE")) {
      ExternalView resourceExternalView =
          _helixAdmin.getResourceExternalView(HELIX_CLUSTER_NAME, tableName + "_OFFLINE");
      Set<String> instanceSet = HelixHelper.getOnlineInstanceFromExternalView(resourceExternalView);
      Assert.assertEquals(instanceSet.size(), i--);
      sendPostRequest(ControllerRequestURLBuilder.baseUrl(CONTROLLER_BASE_API_URL).forInstanceState(instanceName), "disable");
      Thread.sleep(2000);
      resourceExternalView = _helixAdmin.getResourceExternalView(HELIX_CLUSTER_NAME, tableName + "_OFFLINE");
      instanceSet = HelixHelper.getOnlineInstanceFromExternalView(resourceExternalView);
      Assert.assertEquals(instanceSet.size(), i);
      LOGGER.trace("Current running server instance: " + instanceSet.size());
    }

    // Enable Instance
    i = 0;
    for (String instanceName : _helixAdmin.getInstancesInClusterWithTag(HELIX_CLUSTER_NAME, "DefaultTenant_OFFLINE")) {
      ExternalView resourceExternalView =
          _helixAdmin.getResourceExternalView(HELIX_CLUSTER_NAME, tableName + "_OFFLINE");
      Set<String> instanceSet = HelixHelper.getOnlineInstanceFromExternalView(resourceExternalView);
      Assert.assertEquals(instanceSet.size(), i++);
      sendPostRequest(ControllerRequestURLBuilder.baseUrl(CONTROLLER_BASE_API_URL).forInstanceState(instanceName), "ENABLE");
      Thread.sleep(2000);
      resourceExternalView = _helixAdmin.getResourceExternalView(HELIX_CLUSTER_NAME, tableName + "_OFFLINE");
      instanceSet = HelixHelper.getOnlineInstanceFromExternalView(resourceExternalView);
      Assert.assertEquals(instanceSet.size(), i);
      LOGGER.trace("Current running server instance: " + instanceSet.size());
    }

    // Disable BrokerInstance
    i = 20;
    for (String instanceName : _helixAdmin.getInstancesInClusterWithTag(HELIX_CLUSTER_NAME, "DefaultTenant_BROKER")) {
      ExternalView resourceExternalView =
          _helixAdmin.getResourceExternalView(HELIX_CLUSTER_NAME, CommonConstants.Helix.BROKER_RESOURCE_INSTANCE);
      Set<String> instanceSet = HelixHelper.getOnlineInstanceFromExternalView(resourceExternalView);
      Assert.assertEquals(instanceSet.size(), i--);
      sendPostRequest(ControllerRequestURLBuilder.baseUrl(CONTROLLER_BASE_API_URL).forInstanceState(instanceName), "Disable");
      Thread.sleep(2000);
      resourceExternalView =
          _helixAdmin.getResourceExternalView(HELIX_CLUSTER_NAME, CommonConstants.Helix.BROKER_RESOURCE_INSTANCE);
      instanceSet = HelixHelper.getOnlineInstanceFromExternalView(resourceExternalView);
      Assert.assertEquals(instanceSet.size(), i);
      LOGGER.trace("Current running broker instance: " + instanceSet.size());
    }

    // Enable BrokerInstance
    i = 0;
    for (String instanceName : _helixAdmin.getInstancesInClusterWithTag(HELIX_CLUSTER_NAME, "DefaultTenant_BROKER")) {
      ExternalView resourceExternalView =
          _helixAdmin.getResourceExternalView(HELIX_CLUSTER_NAME, CommonConstants.Helix.BROKER_RESOURCE_INSTANCE);
      Set<String> instanceSet = HelixHelper.getOnlineInstanceFromExternalView(resourceExternalView);
      Assert.assertEquals(instanceSet.size(), i++);
      sendPostRequest(ControllerRequestURLBuilder.baseUrl(CONTROLLER_BASE_API_URL).forInstanceState(instanceName), "Enable");
      Thread.sleep(2000);
      resourceExternalView =
          _helixAdmin.getResourceExternalView(HELIX_CLUSTER_NAME, CommonConstants.Helix.BROKER_RESOURCE_INSTANCE);
      instanceSet = HelixHelper.getOnlineInstanceFromExternalView(resourceExternalView);
      Assert.assertEquals(instanceSet.size(), i);
      LOGGER.trace("Current running broker instance: " + instanceSet.size());
    }
    // Delete table
    sendDeleteRequest(ControllerRequestURLBuilder.baseUrl(CONTROLLER_BASE_API_URL).forTableDelete(tableName));
    Thread.sleep(2000);
    Assert.assertEquals(
        _helixAdmin.getResourceIdealState(HELIX_CLUSTER_NAME, CommonConstants.Helix.BROKER_RESOURCE_INSTANCE)
            .getPartitionSet().size(), 0);

  }

  private void addOneOfflineSegment(String resourceName) {
    final SegmentMetadata segmentMetadata = new SimpleSegmentMetadata(resourceName);
    _pinotResourceManager.addSegment(segmentMetadata, "downloadUrl");
  }

  @Override
  protected String getHelixClusterName() {
    return HELIX_CLUSTER_NAME;
  }

}