content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * 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, 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 org.apache.ambari.server.controller.internal;
  
  import static java.util.Collections.emptyMap;
  import static org.easymock.EasyMock.expect;
  import static org.hamcrest.core.Is.is;
  import static org.junit.Assert.assertThat;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Optional;
  
  import org.apache.ambari.server.controller.metrics.MetricHostProvider;
  import org.apache.ambari.server.state.ConfigHelper;
  import org.easymock.EasyMockRule;
  import org.easymock.EasyMockSupport;
  import org.easymock.Mock;
  import org.junit.Before;
  import org.junit.Rule;
  import org.junit.Test;
  
  public class OverriddenMetricsHostProviderTest extends EasyMockSupport {
    private static final String COMPONENT_WITH_OVERRIDDEN_HOST = "component1";
    private static final String CLUSTER_1 = "cluster1";
    private static final String COMPONENT_WITHOUT_OVERRIDDEN_HOST = "componentWithoutOverriddenHost";
    private static final String OVERRIDEN_HOST = "overridenHost1";
    private static final String COMPONENT_WITH_OVERRIDDEN_HOST_PLACEHOLDER = "${hdfs-site/dfs.namenode.http-address}";
    private static final String RESOLVED_HOST = "resolved.fqdn";
    @Rule
    public EasyMockRule mocks = new EasyMockRule(this);
    @Mock
    private MetricHostProvider defaultHostProvider;
    @Mock
    private ConfigHelper configHelper;
    private MetricHostProvider hostProvider;
  
    @Before
    public void setUp() throws Exception {
      hostProvider = new OverriddenMetricsHostProvider(overrideHosts(), defaultHostProvider, configHelper);
    }
  
    @Test
    public void testReturnsDefaultWhenNotOverridden() throws Exception {
      replayAll();
      assertThat(hostProvider.getExternalHostName(CLUSTER_1, COMPONENT_WITHOUT_OVERRIDDEN_HOST), is(Optional.empty()));
      verifyAll();
    }
  
    @Test
    public void testReturnOverriddenHostIfPresent() throws Exception {
      expect(configHelper.getEffectiveConfigProperties(CLUSTER_1, null)).andReturn(emptyMap()).anyTimes();
      replayAll();
      assertThat(hostProvider.getExternalHostName(CLUSTER_1, COMPONENT_WITH_OVERRIDDEN_HOST), is(Optional.of(OVERRIDEN_HOST)));
      verifyAll();
    }
  
    @Test
    public void testReplacesPlaceholderInOverriddenHost() throws Exception {
      expect(configHelper.getEffectiveConfigProperties(CLUSTER_1, null)).andReturn(config()).anyTimes();
      replayAll();
      assertThat(hostProvider.getExternalHostName(CLUSTER_1, COMPONENT_WITH_OVERRIDDEN_HOST_PLACEHOLDER), is(Optional.of(RESOLVED_HOST)));
      verifyAll();
    }
  
    private Map<String, String> overrideHosts() {
      return new HashMap<String, String>() {{
        put(COMPONENT_WITH_OVERRIDDEN_HOST, OVERRIDEN_HOST);
        put(COMPONENT_WITH_OVERRIDDEN_HOST_PLACEHOLDER, "${hdfs-site/dfs.namenode.http-address}");
      }};
    }
  
    private Map<String, Map<String, String>> config() {
      return new HashMap<String, Map<String, String>>() {{
        put("hdfs-site", new HashMap<String, String>() {{
          put("dfs.namenode.http-address", "http://" + RESOLVED_HOST + ":8080");
        }});
      }};
    }
  }