Example usage for org.apache.commons.collections4.map PassiveExpiringMap clear

Introduction

In this page you can find the example usage for org.apache.commons.collections4.map PassiveExpiringMap clear.

Prototype

@Override
public void clear() 

Source Link

Document

Normal Map#clear() behavior with the addition of clearing all expiration entries as well.

Usage

From source file:org.apache.ambari.view.utils.ambari.RemoteClusterTest.java

@Test
public void testGetConfigurationValue() throws Exception {
    URLStreamProvider urlStreamProvider = createNiceMock(URLStreamProvider.class);

    final String desiredConfigsString = "{\"Clusters\": {\"desired_configs\": {\"test-site\": {\"tag\": \"TAG\"}}}}";
    final String configurationString = "{\"items\": [{\"properties\": {\"test.property.name\": \"test property value\"}}]}";
    final int[] desiredConfigPolls = { 0 };
    final int[] testConfigPolls = { 0 };

    expect(urlStreamProvider.readFrom(//from  ww  w .j ava  2s.  co  m
            eq(AMBARI_CLUSTER_REST_URL + "?fields=services/ServiceInfo,hosts,Clusters"), eq("GET"),
            (String) isNull(), (Map<String, String>) anyObject())).andAnswer(new IAnswer<InputStream>() {
                @Override
                public InputStream answer() throws Throwable {
                    desiredConfigPolls[0] += 1;
                    return new ByteArrayInputStream(desiredConfigsString.getBytes());
                }
            }).anyTimes();

    expect(urlStreamProvider.readFrom(eq(AMBARI_CLUSTER_REST_URL + "/configurations?(type=test-site&tag=TAG)"),
            eq("GET"), (String) isNull(), (Map<String, String>) anyObject()))
                    .andAnswer(new IAnswer<InputStream>() {
                        @Override
                        public InputStream answer() throws Throwable {
                            testConfigPolls[0] += 1;
                            return new ByteArrayInputStream(configurationString.getBytes());
                        }
                    }).anyTimes();

    replay(urlStreamProvider);

    RemoteCluster cluster = new RemoteCluster(AMBARI_CLUSTER_REST_URL, urlStreamProvider);
    PassiveExpiringMap<String, JSONObject> cache = new PassiveExpiringMap<String, JSONObject>(10000L);
    cluster.configurationCache = cache;

    String value = cluster.getConfigurationValue("test-site", "test.property.name");
    assertEquals(value, "test property value");
    assertEquals(desiredConfigPolls[0], 1);
    assertEquals(testConfigPolls[0], 1);

    value = cluster.getConfigurationValue("test-site", "test.property.name");
    assertEquals(value, "test property value");
    assertEquals(desiredConfigPolls[0], 1); // cache hit
    assertEquals(testConfigPolls[0], 1);

    cache.clear();
    value = cluster.getConfigurationValue("test-site", "test.property.name");
    assertEquals(value, "test property value");
    assertEquals(desiredConfigPolls[0], 2);
    assertEquals(testConfigPolls[0], 2);
}

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