/**
* 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.hadoop.hbase.trace;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import java.util.Collection;
import org.apache.hadoop.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.Waiter;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Table;
import org.apache.hadoop.hbase.testclassification.MediumTests;
import org.apache.hadoop.hbase.testclassification.MiscTests;
import org.htrace.Sampler;
import org.htrace.Span;
import org.htrace.Trace;
import org.htrace.TraceScope;
import org.htrace.TraceTree;
import org.htrace.impl.POJOSpanReceiver;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import com.google.common.collect.Multimap;
@Category({MiscTests.class, MediumTests.class})
public class TestHTraceHooks {
private static final byte[] FAMILY_BYTES = "family".getBytes();
private static final HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
private static final POJOSpanReceiver rcvr = new POJOSpanReceiver();
@BeforeClass
public static void before() throws Exception {
TEST_UTIL.startMiniCluster(2, 3);
Trace.addReceiver(rcvr);
}
@AfterClass
public static void after() throws Exception {
TEST_UTIL.shutdownMiniCluster();
Trace.removeReceiver(rcvr);
}
@Test
public void testTraceCreateTable() throws Exception {
TraceScope tableCreationSpan = Trace.startSpan("creating table", Sampler.ALWAYS);
Table table;
try {
table = TEST_UTIL.createTable(TableName.valueOf("table"),
FAMILY_BYTES);
} finally {
tableCreationSpan.close();
}
// Some table creation is async. Need to make sure that everything is full in before
// checking to see if the spans are there.
TEST_UTIL.waitFor(1000, new Waiter.Predicate<Exception>() {
@Override
public boolean evaluate() throws Exception {
return rcvr.getSpans().size() >= 5;
}
});
Collection<Span> spans = rcvr.getSpans();
TraceTree traceTree = new TraceTree(spans);
Collection<Span> roots = traceTree.getRoots();
assertEquals(1, roots.size());
Span createTableRoot = roots.iterator().next();
assertEquals("creating table", createTableRoot.getDescription());
Multimap<Long, Span> spansByParentIdMap = traceTree
.getSpansByParentIdMap();
int createTableCount = 0;
for (Span s : spansByParentIdMap.get(createTableRoot.getSpanId())) {
if (s.getDescription().startsWith("MasterService.CreateTable")) {
createTableCount++;
}
}
assertTrue(createTableCount >= 1);
assertTrue(spansByParentIdMap.get(createTableRoot.getSpanId()).size() > 3);
assertTrue(spans.size() > 5);
Put put = new Put("row".getBytes());
put.add(FAMILY_BYTES, "col".getBytes(), "value".getBytes());
TraceScope putSpan = Trace.startSpan("doing put", Sampler.ALWAYS);
try {
table.put(put);
} finally {
putSpan.close();
}
spans = rcvr.getSpans();
traceTree = new TraceTree(spans);
roots = traceTree.getRoots();
assertEquals(2, roots.size());
Span putRoot = null;
for (Span root : roots) {
if (root.getDescription().equals("doing put")) {
putRoot = root;
}
}
assertNotNull(putRoot);
}
}