server/src/test/java/io/druid/server/metrics/MetricsModuleTest.java

/*
 * Licensed to Metamarkets Group Inc. (Metamarkets) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Metamarkets 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 io.druid.server.metrics;

import com.google.common.collect.ImmutableList;
import com.google.inject.Binder;
import com.google.inject.Injector;
import com.google.inject.Key;
import com.google.inject.Module;
import com.google.inject.name.Names;
import io.druid.guice.GuiceInjectors;
import io.druid.guice.JsonConfigProvider;
import io.druid.guice.annotations.Self;
import io.druid.initialization.Initialization;
import io.druid.server.DruidNode;
import org.junit.Assert;
import org.junit.Test;

public class MetricsModuleTest
{
  @Test
  public void testSimpleInjection()
  {
    final Injector injector = Initialization.makeInjectorWithModules(
        GuiceInjectors.makeStartupInjector(),
        ImmutableList.of(new Module()
        {

          @Override
          public void configure(Binder binder)
          {
            JsonConfigProvider.bindInstance(
                binder, Key.get(DruidNode.class, Self.class), new DruidNode("test-inject", null, null, null, true, false)
            );
          }
        })
    );
    final DataSourceTaskIdHolder dimensionIdHolder = new DataSourceTaskIdHolder();
    injector.injectMembers(dimensionIdHolder);
    Assert.assertNull(dimensionIdHolder.getDataSource());
    Assert.assertNull(dimensionIdHolder.getTaskId());
  }

  @Test
  public void testSimpleInjectionWithValues()
  {
    final String dataSource = "some datasource";
    final String taskId = "some task";
    final Injector injector = Initialization.makeInjectorWithModules(
        GuiceInjectors.makeStartupInjector(),
        ImmutableList.of(new Module()
        {

          @Override
          public void configure(Binder binder)
          {
            JsonConfigProvider.bindInstance(
                binder, Key.get(DruidNode.class, Self.class), new DruidNode("test-inject", null, null, null, true, false)
            );
            binder.bind(Key.get(
                String.class,
                Names.named(DataSourceTaskIdHolder.DATA_SOURCE_BINDING)
            )).toInstance(dataSource);
            binder.bind(Key.get(String.class, Names.named(DataSourceTaskIdHolder.TASK_ID_BINDING)))
                  .toInstance(taskId);
          }
        })
    );
    final DataSourceTaskIdHolder dimensionIdHolder = new DataSourceTaskIdHolder();
    injector.injectMembers(dimensionIdHolder);
    Assert.assertEquals(dataSource, dimensionIdHolder.getDataSource());
    Assert.assertEquals(taskId, dimensionIdHolder.getTaskId());
  }
}