/*
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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,
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.edgent.test.metrics;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import java.util.Set;
import java.util.SortedMap;

import javax.management.ObjectName;

import org.apache.edgent.metrics.MetricObjectNameFactory;
import org.apache.edgent.metrics.Metrics;
import org.apache.edgent.topology.TStream;
import org.apache.edgent.topology.Topology;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;

import com.codahale.metrics.Counter;

/*
 * Failures in these tests may indicate that job/oplet id prefixes defined
 * by the embedded runtime and those used by MetricObjectNameFactory got out 
 * of sync.
 */
@Ignore("abstract, provides common tests for concrete implementations")
public abstract class MetricObjectNameFactoryTest extends MetricsOnTest {
    private MetricObjectNameFactory factory;
    
    @Before
    public void createMetricObjectNameFactory() throws Exception {
        this.factory = new MetricObjectNameFactory();
    }
    

    @Test
    public void testCreateName() throws Exception {
        String name = counterName(new String[] {"a", "b", "c"});
        
        ObjectName on = factory.createName("counters", "domain", name);
        assertEquals("domain", on.getDomain());
        assertEquals(MetricObjectNameFactory.TYPE_PREFIX + ".counters", 
                on.getKeyProperty(MetricObjectNameFactory.KEY_TYPE));
        assertEquals(job.getId(), 
                on.getKeyProperty(MetricObjectNameFactory.KEY_JOBID));
        assertEquals(MetricObjectNameFactory.PREFIX_OPID + "1", 
                on.getKeyProperty(MetricObjectNameFactory.KEY_OPID));
    }

    @Test
    public void testCreateNameWithNoJobId() throws Exception {
        String name = counterName(new String[] {"a", "b", "c"});

        name = name.replace(MetricObjectNameFactory.PREFIX_JOBID, "XXX");
        ObjectName on = factory.createName("counters", "domain", name);
        assertEquals("domain", on.getDomain());
        assertEquals(MetricObjectNameFactory.TYPE_PREFIX + ".counters", 
                on.getKeyProperty(MetricObjectNameFactory.KEY_TYPE));
        assertTrue(on.getKeyProperty(MetricObjectNameFactory.KEY_JOBID) == null);
        assertEquals(MetricObjectNameFactory.PREFIX_OPID + "1", 
                on.getKeyProperty(MetricObjectNameFactory.KEY_OPID));
    }

    @Test
    public void testCreateNameWithNoOpId() throws Exception {
        String name = counterName(new String[] {"a", "b", "c"});
        name = name.replace(MetricObjectNameFactory.PREFIX_OPID, "XXX");
        ObjectName on = factory.createName("counters", "domain", name);
        assertEquals("domain", on.getDomain());
        assertEquals(MetricObjectNameFactory.TYPE_PREFIX + ".counters", 
                on.getKeyProperty(MetricObjectNameFactory.KEY_TYPE));
        assertTrue(on.getKeyProperty(MetricObjectNameFactory.KEY_OPID) == null);
        assertEquals(job.getId(), 
                on.getKeyProperty(MetricObjectNameFactory.KEY_JOBID));
    }

    private String counterName(String[] data) throws Exception {
        Topology t = newTopology();
        TStream<String> s = t.strings(data);
        s = Metrics.counter(s);

        waitUntilComplete(t, s, data);

        if (metricRegistry != null) {
            SortedMap<String, Counter> counters = metricRegistry.getCounters();
            assertEquals(1, counters.size());
            Set<String> names = metricRegistry.getNames();
            assertEquals(1, names.size());
            for (String name : names) {
                return name;
            }
        }
        return null;
    }
}