TestHelixTaskHandler.java example

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helix-master
package org.apache.helix;

/*
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 * 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,
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 * "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
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import java.util.Date;

import org.apache.helix.Mocks.MockManager;
import org.apache.helix.Mocks.MockStateModel;
import org.apache.helix.Mocks.MockStateModelAnnotated;
import org.apache.helix.PropertyKey.Builder;
import org.apache.helix.api.State;
import org.apache.helix.api.StateTransitionHandlerFactory;
import org.apache.helix.api.id.MessageId;
import org.apache.helix.api.id.PartitionId;
import org.apache.helix.api.id.ResourceId;
import org.apache.helix.api.id.SessionId;
import org.apache.helix.api.id.StateModelDefId;
import org.apache.helix.messaging.handling.HelixStateTransitionHandler;
import org.apache.helix.messaging.handling.HelixTask;
import org.apache.helix.messaging.handling.HelixTaskExecutor;
import org.apache.helix.model.CurrentState;
import org.apache.helix.model.Message;
import org.apache.helix.model.Message.MessageType;
import org.apache.helix.model.StateModelDefinition;
import org.apache.helix.tools.StateModelConfigGenerator;
import org.testng.AssertJUnit;
import org.testng.annotations.Test;

public class TestHelixTaskHandler {
  @Test()
  public void testInvocation() throws Exception {
    HelixTaskExecutor executor = new HelixTaskExecutor();
    System.out.println("START TestCMTaskHandler.testInvocation()");
    Message message = new Message(MessageType.STATE_TRANSITION, MessageId.from("Some unique id"));

    message.setSrcName("cm-instance-0");
    message.setTgtSessionId(SessionId.from("1234"));
    message.setFromState(State.from("Offline"));
    message.setToState(State.from("Slave"));
    message.setPartitionId(PartitionId.from("TestDB_0"));
    message.setMessageId(MessageId.from("Some unique message id"));
    message.setResourceId(ResourceId.from("TestDB"));
    message.setTgtName("localhost");
    message.setStateModelDef(StateModelDefId.from("MasterSlave"));
    message.setStateModelFactoryName(HelixConstants.DEFAULT_STATE_MODEL_FACTORY);
    MockStateModel stateModel = new MockStateModel();
    NotificationContext context;
    MockManager manager = new MockManager("clusterName");
    HelixDataAccessor accessor = manager.getHelixDataAccessor();
    StateModelDefinition stateModelDef =
        new StateModelDefinition(StateModelConfigGenerator.generateConfigForMasterSlave());
    Builder keyBuilder = accessor.keyBuilder();
    accessor.setProperty(keyBuilder.stateModelDef("MasterSlave"), stateModelDef);

    context = new NotificationContext(manager);
    CurrentState currentStateDelta = new CurrentState("TestDB");
    currentStateDelta.setState(PartitionId.from("TestDB_0"), State.from("OFFLINE"));

    HelixStateTransitionHandler stHandler =
        new HelixStateTransitionHandler(null, stateModel, message, context, currentStateDelta);
    HelixTask handler;
    handler = new HelixTask(message, context, stHandler, executor);
    handler.call();
    AssertJUnit.assertTrue(stateModel.stateModelInvoked);
    System.out.println("END TestCMTaskHandler.testInvocation() at "
        + new Date(System.currentTimeMillis()));
  }

  @Test()
  public void testInvocationAnnotated() throws Exception {
    System.out.println("START TestCMTaskHandler.testInvocationAnnotated() at "
        + new Date(System.currentTimeMillis()));
    HelixTaskExecutor executor = new HelixTaskExecutor();
    Message message = new Message(MessageType.STATE_TRANSITION, MessageId.from("Some unique id"));
    message.setSrcName("cm-instance-0");
    message.setTgtSessionId(SessionId.from("1234"));
    message.setFromState(State.from("Offline"));
    message.setToState(State.from("Slave"));
    message.setPartitionId(PartitionId.from("TestDB_0"));
    message.setMessageId(MessageId.from("Some unique message id"));
    message.setResourceId(ResourceId.from("TestDB"));
    message.setTgtName("localhost");
    message.setStateModelDef(StateModelDefId.from("MasterSlave"));
    message.setStateModelFactoryName(HelixConstants.DEFAULT_STATE_MODEL_FACTORY);
    MockStateModelAnnotated stateModel = new MockStateModelAnnotated();
    NotificationContext context;

    MockManager manager = new MockManager("clusterName");
    HelixDataAccessor accessor = manager.getHelixDataAccessor();

    StateModelDefinition stateModelDef =
        new StateModelDefinition(StateModelConfigGenerator.generateConfigForMasterSlave());
    Builder keyBuilder = accessor.keyBuilder();
    accessor.setProperty(keyBuilder.stateModelDef("MasterSlave"), stateModelDef);

    context = new NotificationContext(manager);

    CurrentState currentStateDelta = new CurrentState("TestDB");
    currentStateDelta.setState(PartitionId.from("TestDB_0"), State.from("OFFLINE"));

    StateTransitionHandlerFactory<MockStateModelAnnotated> stateModelFactory =
        new StateTransitionHandlerFactory<MockStateModelAnnotated>() {

          @Override
          public MockStateModelAnnotated createStateTransitionHandler(ResourceId resource, PartitionId partitionName) {
            // TODO Auto-generated method stub
            return new MockStateModelAnnotated();
          }

        };

    HelixStateTransitionHandler stHandler =
        new HelixStateTransitionHandler(stateModelFactory, stateModel, message, context,
            currentStateDelta);

    HelixTask handler = new HelixTask(message, context, stHandler, executor);
    handler.call();
    AssertJUnit.assertTrue(stateModel.stateModelInvoked);
    System.out.println("END TestCMTaskHandler.testInvocationAnnotated() at "
        + new Date(System.currentTimeMillis()));
  }

}